7481582774
Start implementing https://github.com/ziglang/zig/issues/4917 which is to rename instream/outstream to reader/writer. This first change allows code to use Writer/writer instead of OutStream/outStream, but still maintains the old outstream names with "Deprecated" comments.
2542 lines
119 KiB
Zig
2542 lines
119 KiB
Zig
const std = @import("../std.zig");
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const assert = std.debug.assert;
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const mem = std.mem;
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const ast = std.zig.ast;
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const Token = std.zig.Token;
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const indent_delta = 4;
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pub const Error = error{
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/// Ran out of memory allocating call stack frames to complete rendering.
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OutOfMemory,
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};
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/// Returns whether anything changed
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pub fn render(allocator: *mem.Allocator, stream: var, tree: *ast.Tree) (@TypeOf(stream).Error || Error)!bool {
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// cannot render an invalid tree
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std.debug.assert(tree.errors.len == 0);
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// make a passthrough stream that checks whether something changed
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const MyStream = struct {
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const MyStream = @This();
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const StreamError = @TypeOf(stream).Error;
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child_stream: @TypeOf(stream),
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anything_changed: bool,
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source_index: usize,
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source: []const u8,
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fn write(self: *MyStream, bytes: []const u8) StreamError!usize {
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if (!self.anything_changed) {
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const end = self.source_index + bytes.len;
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if (end > self.source.len) {
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self.anything_changed = true;
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} else {
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const src_slice = self.source[self.source_index..end];
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self.source_index += bytes.len;
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if (!mem.eql(u8, bytes, src_slice)) {
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self.anything_changed = true;
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}
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}
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}
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return self.child_stream.write(bytes);
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}
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};
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var my_stream = MyStream{
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.child_stream = stream,
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.anything_changed = false,
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.source_index = 0,
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.source = tree.source,
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};
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const my_stream_stream: std.io.Writer(*MyStream, MyStream.StreamError, MyStream.write) = .{
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.context = &my_stream,
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};
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try renderRoot(allocator, my_stream_stream, tree);
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if (my_stream.source_index != my_stream.source.len) {
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my_stream.anything_changed = true;
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}
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return my_stream.anything_changed;
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}
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fn renderRoot(
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allocator: *mem.Allocator,
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stream: var,
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tree: *ast.Tree,
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) (@TypeOf(stream).Error || Error)!void {
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// render all the line comments at the beginning of the file
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for (tree.token_ids) |token_id, i| {
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if (token_id != .LineComment) break;
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const token_loc = tree.token_locs[i];
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try stream.print("{}\n", .{mem.trimRight(u8, tree.tokenSliceLoc(token_loc), " ")});
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const next_token = tree.token_locs[i + 1];
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const loc = tree.tokenLocationLoc(token_loc.end, next_token);
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if (loc.line >= 2) {
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try stream.writeByte('\n');
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}
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}
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var start_col: usize = 0;
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var decl_i: ast.NodeIndex = 0;
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const root_decls = tree.root_node.decls();
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if (root_decls.len == 0) return;
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while (true) {
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var decl = root_decls[decl_i];
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// This loop does the following:
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//
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// - Iterates through line/doc comment tokens that precedes the current
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// decl.
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// - Figures out the first token index (`copy_start_token_index`) which
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// hasn't been copied to the output stream yet.
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// - Detects `zig fmt: (off|on)` in the line comment tokens, and
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// determines whether the current decl should be reformatted or not.
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//
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var token_index = decl.firstToken();
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var fmt_active = true;
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var found_fmt_directive = false;
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var copy_start_token_index = token_index;
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while (token_index != 0) {
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token_index -= 1;
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const token_id = tree.token_ids[token_index];
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switch (token_id) {
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.LineComment => {},
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.DocComment => {
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copy_start_token_index = token_index;
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continue;
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},
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else => break,
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}
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const token_loc = tree.token_locs[token_index];
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if (mem.eql(u8, mem.trim(u8, tree.tokenSliceLoc(token_loc)[2..], " "), "zig fmt: off")) {
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if (!found_fmt_directive) {
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fmt_active = false;
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found_fmt_directive = true;
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}
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} else if (mem.eql(u8, mem.trim(u8, tree.tokenSliceLoc(token_loc)[2..], " "), "zig fmt: on")) {
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if (!found_fmt_directive) {
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fmt_active = true;
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found_fmt_directive = true;
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}
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}
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}
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if (!fmt_active) {
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// Reformatting is disabled for the current decl and possibly some
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// more decls that follow.
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// Find the next `decl` for which reformatting is re-enabled.
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token_index = decl.firstToken();
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while (!fmt_active) {
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decl_i += 1;
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if (decl_i >= root_decls.len) {
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// If there's no next reformatted `decl`, just copy the
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// remaining input tokens and bail out.
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const start = tree.token_locs[copy_start_token_index].start;
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try copyFixingWhitespace(stream, tree.source[start..]);
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return;
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}
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decl = root_decls[decl_i];
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var decl_first_token_index = decl.firstToken();
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while (token_index < decl_first_token_index) : (token_index += 1) {
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const token_id = tree.token_ids[token_index];
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switch (token_id) {
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.LineComment => {},
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.Eof => unreachable,
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else => continue,
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}
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const token_loc = tree.token_locs[token_index];
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if (mem.eql(u8, mem.trim(u8, tree.tokenSliceLoc(token_loc)[2..], " "), "zig fmt: on")) {
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fmt_active = true;
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} else if (mem.eql(u8, mem.trim(u8, tree.tokenSliceLoc(token_loc)[2..], " "), "zig fmt: off")) {
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fmt_active = false;
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}
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}
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}
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// Found the next `decl` for which reformatting is enabled. Copy
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// the input tokens before the `decl` that haven't been copied yet.
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var copy_end_token_index = decl.firstToken();
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token_index = copy_end_token_index;
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while (token_index != 0) {
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token_index -= 1;
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const token_id = tree.token_ids[token_index];
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switch (token_id) {
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.LineComment => {},
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.DocComment => {
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copy_end_token_index = token_index;
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continue;
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},
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else => break,
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}
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}
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const start = tree.token_locs[copy_start_token_index].start;
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const end = tree.token_locs[copy_end_token_index].start;
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try copyFixingWhitespace(stream, tree.source[start..end]);
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}
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try renderTopLevelDecl(allocator, stream, tree, 0, &start_col, decl);
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decl_i += 1;
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if (decl_i >= root_decls.len) return;
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try renderExtraNewline(tree, stream, &start_col, root_decls[decl_i]);
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}
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}
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fn renderExtraNewline(tree: *ast.Tree, stream: var, start_col: *usize, node: *ast.Node) @TypeOf(stream).Error!void {
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return renderExtraNewlineToken(tree, stream, start_col, node.firstToken());
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}
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fn renderExtraNewlineToken(
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tree: *ast.Tree,
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stream: var,
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start_col: *usize,
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first_token: ast.TokenIndex,
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) @TypeOf(stream).Error!void {
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var prev_token = first_token;
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if (prev_token == 0) return;
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var newline_threshold: usize = 2;
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while (tree.token_ids[prev_token - 1] == .DocComment) {
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if (tree.tokenLocation(tree.token_locs[prev_token - 1].end, prev_token).line == 1) {
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newline_threshold += 1;
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}
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prev_token -= 1;
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}
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const prev_token_end = tree.token_locs[prev_token - 1].end;
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const loc = tree.tokenLocation(prev_token_end, first_token);
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if (loc.line >= newline_threshold) {
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try stream.writeByte('\n');
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start_col.* = 0;
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}
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}
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fn renderTopLevelDecl(allocator: *mem.Allocator, stream: var, tree: *ast.Tree, indent: usize, start_col: *usize, decl: *ast.Node) (@TypeOf(stream).Error || Error)!void {
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try renderContainerDecl(allocator, stream, tree, indent, start_col, decl, .Newline);
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}
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fn renderContainerDecl(allocator: *mem.Allocator, stream: var, tree: *ast.Tree, indent: usize, start_col: *usize, decl: *ast.Node, space: Space) (@TypeOf(stream).Error || Error)!void {
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switch (decl.id) {
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.FnProto => {
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const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", decl);
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try renderDocComments(tree, stream, fn_proto, indent, start_col);
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if (fn_proto.body_node) |body_node| {
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try renderExpression(allocator, stream, tree, indent, start_col, decl, .Space);
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try renderExpression(allocator, stream, tree, indent, start_col, body_node, space);
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} else {
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try renderExpression(allocator, stream, tree, indent, start_col, decl, .None);
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try renderToken(tree, stream, tree.nextToken(decl.lastToken()), indent, start_col, space);
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}
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},
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.Use => {
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const use_decl = @fieldParentPtr(ast.Node.Use, "base", decl);
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if (use_decl.visib_token) |visib_token| {
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try renderToken(tree, stream, visib_token, indent, start_col, .Space); // pub
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}
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try renderToken(tree, stream, use_decl.use_token, indent, start_col, .Space); // usingnamespace
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try renderExpression(allocator, stream, tree, indent, start_col, use_decl.expr, .None);
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try renderToken(tree, stream, use_decl.semicolon_token, indent, start_col, space); // ;
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},
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.VarDecl => {
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const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", decl);
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try renderDocComments(tree, stream, var_decl, indent, start_col);
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try renderVarDecl(allocator, stream, tree, indent, start_col, var_decl);
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},
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.TestDecl => {
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const test_decl = @fieldParentPtr(ast.Node.TestDecl, "base", decl);
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try renderDocComments(tree, stream, test_decl, indent, start_col);
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try renderToken(tree, stream, test_decl.test_token, indent, start_col, .Space);
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try renderExpression(allocator, stream, tree, indent, start_col, test_decl.name, .Space);
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try renderExpression(allocator, stream, tree, indent, start_col, test_decl.body_node, space);
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},
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.ContainerField => {
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const field = @fieldParentPtr(ast.Node.ContainerField, "base", decl);
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try renderDocComments(tree, stream, field, indent, start_col);
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if (field.comptime_token) |t| {
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try renderToken(tree, stream, t, indent, start_col, .Space); // comptime
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}
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const src_has_trailing_comma = blk: {
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const maybe_comma = tree.nextToken(field.lastToken());
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break :blk tree.token_ids[maybe_comma] == .Comma;
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};
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// The trailing comma is emitted at the end, but if it's not present
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// we still have to respect the specified `space` parameter
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const last_token_space: Space = if (src_has_trailing_comma) .None else space;
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if (field.type_expr == null and field.value_expr == null) {
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try renderToken(tree, stream, field.name_token, indent, start_col, last_token_space); // name
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} else if (field.type_expr != null and field.value_expr == null) {
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try renderToken(tree, stream, field.name_token, indent, start_col, .None); // name
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try renderToken(tree, stream, tree.nextToken(field.name_token), indent, start_col, .Space); // :
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if (field.align_expr) |align_value_expr| {
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try renderExpression(allocator, stream, tree, indent, start_col, field.type_expr.?, .Space); // type
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const lparen_token = tree.prevToken(align_value_expr.firstToken());
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const align_kw = tree.prevToken(lparen_token);
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const rparen_token = tree.nextToken(align_value_expr.lastToken());
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try renderToken(tree, stream, align_kw, indent, start_col, .None); // align
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try renderToken(tree, stream, lparen_token, indent, start_col, .None); // (
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try renderExpression(allocator, stream, tree, indent, start_col, align_value_expr, .None); // alignment
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try renderToken(tree, stream, rparen_token, indent, start_col, last_token_space); // )
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} else {
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try renderExpression(allocator, stream, tree, indent, start_col, field.type_expr.?, last_token_space); // type
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}
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} else if (field.type_expr == null and field.value_expr != null) {
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try renderToken(tree, stream, field.name_token, indent, start_col, .Space); // name
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try renderToken(tree, stream, tree.nextToken(field.name_token), indent, start_col, .Space); // =
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try renderExpression(allocator, stream, tree, indent, start_col, field.value_expr.?, last_token_space); // value
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} else {
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try renderToken(tree, stream, field.name_token, indent, start_col, .None); // name
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try renderToken(tree, stream, tree.nextToken(field.name_token), indent, start_col, .Space); // :
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if (field.align_expr) |align_value_expr| {
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try renderExpression(allocator, stream, tree, indent, start_col, field.type_expr.?, .Space); // type
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const lparen_token = tree.prevToken(align_value_expr.firstToken());
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const align_kw = tree.prevToken(lparen_token);
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const rparen_token = tree.nextToken(align_value_expr.lastToken());
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try renderToken(tree, stream, align_kw, indent, start_col, .None); // align
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try renderToken(tree, stream, lparen_token, indent, start_col, .None); // (
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try renderExpression(allocator, stream, tree, indent, start_col, align_value_expr, .None); // alignment
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try renderToken(tree, stream, rparen_token, indent, start_col, .Space); // )
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} else {
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try renderExpression(allocator, stream, tree, indent, start_col, field.type_expr.?, .Space); // type
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}
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try renderToken(tree, stream, tree.prevToken(field.value_expr.?.firstToken()), indent, start_col, .Space); // =
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try renderExpression(allocator, stream, tree, indent, start_col, field.value_expr.?, last_token_space); // value
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}
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if (src_has_trailing_comma) {
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const comma = tree.nextToken(field.lastToken());
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try renderToken(tree, stream, comma, indent, start_col, space);
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}
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},
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.Comptime => {
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assert(!decl.requireSemiColon());
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try renderExpression(allocator, stream, tree, indent, start_col, decl, space);
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},
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.DocComment => {
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const comment = @fieldParentPtr(ast.Node.DocComment, "base", decl);
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const kind = tree.token_ids[comment.first_line];
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try renderToken(tree, stream, comment.first_line, indent, start_col, .Newline);
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var tok_i = comment.first_line + 1;
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while (true) : (tok_i += 1) {
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const tok_id = tree.token_ids[tok_i];
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if (tok_id == kind) {
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try stream.writeByteNTimes(' ', indent);
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try renderToken(tree, stream, tok_i, indent, start_col, .Newline);
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} else if (tok_id == .LineComment) {
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continue;
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} else {
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break;
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}
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}
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},
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else => unreachable,
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}
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}
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fn renderExpression(
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allocator: *mem.Allocator,
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stream: var,
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tree: *ast.Tree,
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indent: usize,
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start_col: *usize,
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base: *ast.Node,
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space: Space,
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) (@TypeOf(stream).Error || Error)!void {
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switch (base.id) {
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.Identifier => {
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const identifier = @fieldParentPtr(ast.Node.Identifier, "base", base);
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return renderToken(tree, stream, identifier.token, indent, start_col, space);
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},
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|
.Block => {
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const block = @fieldParentPtr(ast.Node.Block, "base", base);
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if (block.label) |label| {
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try renderToken(tree, stream, label, indent, start_col, Space.None);
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try renderToken(tree, stream, tree.nextToken(label), indent, start_col, Space.Space);
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}
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|
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if (block.statements_len == 0) {
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try renderToken(tree, stream, block.lbrace, indent + indent_delta, start_col, Space.None);
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return renderToken(tree, stream, block.rbrace, indent, start_col, space);
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} else {
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const block_indent = indent + indent_delta;
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try renderToken(tree, stream, block.lbrace, block_indent, start_col, Space.Newline);
|
|
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const block_statements = block.statements();
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for (block_statements) |statement, i| {
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try stream.writeByteNTimes(' ', block_indent);
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try renderStatement(allocator, stream, tree, block_indent, start_col, statement);
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if (i + 1 < block_statements.len) {
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try renderExtraNewline(tree, stream, start_col, block_statements[i + 1]);
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}
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|
}
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try stream.writeByteNTimes(' ', indent);
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return renderToken(tree, stream, block.rbrace, indent, start_col, space);
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}
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},
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|
.Defer => {
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|
const defer_node = @fieldParentPtr(ast.Node.Defer, "base", base);
|
|
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|
try renderToken(tree, stream, defer_node.defer_token, indent, start_col, Space.Space);
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|
if (defer_node.payload) |payload| {
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try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
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}
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return renderExpression(allocator, stream, tree, indent, start_col, defer_node.expr, space);
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},
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|
.Comptime => {
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const comptime_node = @fieldParentPtr(ast.Node.Comptime, "base", base);
|
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try renderToken(tree, stream, comptime_node.comptime_token, indent, start_col, Space.Space);
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return renderExpression(allocator, stream, tree, indent, start_col, comptime_node.expr, space);
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},
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|
.Nosuspend => {
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const nosuspend_node = @fieldParentPtr(ast.Node.Nosuspend, "base", base);
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if (mem.eql(u8, tree.tokenSlice(nosuspend_node.nosuspend_token), "noasync")) {
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// TODO: remove this
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try stream.writeAll("nosuspend ");
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} else {
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try renderToken(tree, stream, nosuspend_node.nosuspend_token, indent, start_col, Space.Space);
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|
}
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return renderExpression(allocator, stream, tree, indent, start_col, nosuspend_node.expr, space);
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},
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.Suspend => {
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const suspend_node = @fieldParentPtr(ast.Node.Suspend, "base", base);
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|
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|
if (suspend_node.body) |body| {
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try renderToken(tree, stream, suspend_node.suspend_token, indent, start_col, Space.Space);
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return renderExpression(allocator, stream, tree, indent, start_col, body, space);
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|
} else {
|
|
return renderToken(tree, stream, suspend_node.suspend_token, indent, start_col, space);
|
|
}
|
|
},
|
|
|
|
.InfixOp => {
|
|
const infix_op_node = @fieldParentPtr(ast.Node.InfixOp, "base", base);
|
|
|
|
const op_space = switch (infix_op_node.op) {
|
|
ast.Node.InfixOp.Op.Period, ast.Node.InfixOp.Op.ErrorUnion, ast.Node.InfixOp.Op.Range => Space.None,
|
|
else => Space.Space,
|
|
};
|
|
try renderExpression(allocator, stream, tree, indent, start_col, infix_op_node.lhs, op_space);
|
|
|
|
const after_op_space = blk: {
|
|
const loc = tree.tokenLocation(tree.token_locs[infix_op_node.op_token].end, tree.nextToken(infix_op_node.op_token));
|
|
break :blk if (loc.line == 0) op_space else Space.Newline;
|
|
};
|
|
|
|
try renderToken(tree, stream, infix_op_node.op_token, indent, start_col, after_op_space);
|
|
if (after_op_space == Space.Newline and
|
|
tree.token_ids[tree.nextToken(infix_op_node.op_token)] != .MultilineStringLiteralLine)
|
|
{
|
|
try stream.writeByteNTimes(' ', indent + indent_delta);
|
|
start_col.* = indent + indent_delta;
|
|
}
|
|
|
|
switch (infix_op_node.op) {
|
|
ast.Node.InfixOp.Op.Catch => |maybe_payload| if (maybe_payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
|
|
},
|
|
else => {},
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, infix_op_node.rhs, space);
|
|
},
|
|
|
|
.PrefixOp => {
|
|
const prefix_op_node = @fieldParentPtr(ast.Node.PrefixOp, "base", base);
|
|
|
|
switch (prefix_op_node.op) {
|
|
.PtrType => |ptr_info| {
|
|
const op_tok_id = tree.token_ids[prefix_op_node.op_token];
|
|
switch (op_tok_id) {
|
|
.Asterisk, .AsteriskAsterisk => try stream.writeByte('*'),
|
|
.LBracket => if (tree.token_ids[prefix_op_node.op_token + 2] == .Identifier)
|
|
try stream.writeAll("[*c")
|
|
else
|
|
try stream.writeAll("[*"),
|
|
else => unreachable,
|
|
}
|
|
if (ptr_info.sentinel) |sentinel| {
|
|
const colon_token = tree.prevToken(sentinel.firstToken());
|
|
try renderToken(tree, stream, colon_token, indent, start_col, Space.None); // :
|
|
const sentinel_space = switch (op_tok_id) {
|
|
.LBracket => Space.None,
|
|
else => Space.Space,
|
|
};
|
|
try renderExpression(allocator, stream, tree, indent, start_col, sentinel, sentinel_space);
|
|
}
|
|
switch (op_tok_id) {
|
|
.Asterisk, .AsteriskAsterisk => {},
|
|
.LBracket => try stream.writeByte(']'),
|
|
else => unreachable,
|
|
}
|
|
if (ptr_info.allowzero_token) |allowzero_token| {
|
|
try renderToken(tree, stream, allowzero_token, indent, start_col, Space.Space); // allowzero
|
|
}
|
|
if (ptr_info.align_info) |align_info| {
|
|
const lparen_token = tree.prevToken(align_info.node.firstToken());
|
|
const align_token = tree.prevToken(lparen_token);
|
|
|
|
try renderToken(tree, stream, align_token, indent, start_col, Space.None); // align
|
|
try renderToken(tree, stream, lparen_token, indent, start_col, Space.None); // (
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, align_info.node, Space.None);
|
|
|
|
if (align_info.bit_range) |bit_range| {
|
|
const colon1 = tree.prevToken(bit_range.start.firstToken());
|
|
const colon2 = tree.prevToken(bit_range.end.firstToken());
|
|
|
|
try renderToken(tree, stream, colon1, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, bit_range.start, Space.None);
|
|
try renderToken(tree, stream, colon2, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, bit_range.end, Space.None);
|
|
|
|
const rparen_token = tree.nextToken(bit_range.end.lastToken());
|
|
try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
|
|
} else {
|
|
const rparen_token = tree.nextToken(align_info.node.lastToken());
|
|
try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
|
|
}
|
|
}
|
|
if (ptr_info.const_token) |const_token| {
|
|
try renderToken(tree, stream, const_token, indent, start_col, Space.Space); // const
|
|
}
|
|
if (ptr_info.volatile_token) |volatile_token| {
|
|
try renderToken(tree, stream, volatile_token, indent, start_col, Space.Space); // volatile
|
|
}
|
|
},
|
|
|
|
.SliceType => |ptr_info| {
|
|
try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.None); // [
|
|
if (ptr_info.sentinel) |sentinel| {
|
|
const colon_token = tree.prevToken(sentinel.firstToken());
|
|
try renderToken(tree, stream, colon_token, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, sentinel, Space.None);
|
|
try renderToken(tree, stream, tree.nextToken(sentinel.lastToken()), indent, start_col, Space.None); // ]
|
|
} else {
|
|
try renderToken(tree, stream, tree.nextToken(prefix_op_node.op_token), indent, start_col, Space.None); // ]
|
|
}
|
|
|
|
if (ptr_info.allowzero_token) |allowzero_token| {
|
|
try renderToken(tree, stream, allowzero_token, indent, start_col, Space.Space); // allowzero
|
|
}
|
|
if (ptr_info.align_info) |align_info| {
|
|
const lparen_token = tree.prevToken(align_info.node.firstToken());
|
|
const align_token = tree.prevToken(lparen_token);
|
|
|
|
try renderToken(tree, stream, align_token, indent, start_col, Space.None); // align
|
|
try renderToken(tree, stream, lparen_token, indent, start_col, Space.None); // (
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, align_info.node, Space.None);
|
|
|
|
if (align_info.bit_range) |bit_range| {
|
|
const colon1 = tree.prevToken(bit_range.start.firstToken());
|
|
const colon2 = tree.prevToken(bit_range.end.firstToken());
|
|
|
|
try renderToken(tree, stream, colon1, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, bit_range.start, Space.None);
|
|
try renderToken(tree, stream, colon2, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, bit_range.end, Space.None);
|
|
|
|
const rparen_token = tree.nextToken(bit_range.end.lastToken());
|
|
try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
|
|
} else {
|
|
const rparen_token = tree.nextToken(align_info.node.lastToken());
|
|
try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
|
|
}
|
|
}
|
|
if (ptr_info.const_token) |const_token| {
|
|
try renderToken(tree, stream, const_token, indent, start_col, Space.Space);
|
|
}
|
|
if (ptr_info.volatile_token) |volatile_token| {
|
|
try renderToken(tree, stream, volatile_token, indent, start_col, Space.Space);
|
|
}
|
|
},
|
|
|
|
.ArrayType => |array_info| {
|
|
const lbracket = prefix_op_node.op_token;
|
|
const rbracket = tree.nextToken(if (array_info.sentinel) |sentinel|
|
|
sentinel.lastToken()
|
|
else
|
|
array_info.len_expr.lastToken());
|
|
|
|
try renderToken(tree, stream, lbracket, indent, start_col, Space.None); // [
|
|
|
|
const starts_with_comment = tree.token_ids[lbracket + 1] == .LineComment;
|
|
const ends_with_comment = tree.token_ids[rbracket - 1] == .LineComment;
|
|
const new_indent = if (ends_with_comment) indent + indent_delta else indent;
|
|
const new_space = if (ends_with_comment) Space.Newline else Space.None;
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, array_info.len_expr, new_space);
|
|
if (starts_with_comment) {
|
|
try stream.writeByte('\n');
|
|
}
|
|
if (ends_with_comment or starts_with_comment) {
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
if (array_info.sentinel) |sentinel| {
|
|
const colon_token = tree.prevToken(sentinel.firstToken());
|
|
try renderToken(tree, stream, colon_token, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, sentinel, Space.None);
|
|
}
|
|
try renderToken(tree, stream, rbracket, indent, start_col, Space.None); // ]
|
|
},
|
|
.BitNot,
|
|
.BoolNot,
|
|
.Negation,
|
|
.NegationWrap,
|
|
.OptionalType,
|
|
.AddressOf,
|
|
=> {
|
|
try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.None);
|
|
},
|
|
|
|
.Try,
|
|
.Resume,
|
|
=> {
|
|
try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.Space);
|
|
},
|
|
|
|
.Await => |await_info| {
|
|
try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.Space);
|
|
},
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, prefix_op_node.rhs, space);
|
|
},
|
|
|
|
.ArrayInitializer, .ArrayInitializerDot => {
|
|
var rtoken: ast.TokenIndex = undefined;
|
|
var exprs: []*ast.Node = undefined;
|
|
const lhs: union(enum) { dot: ast.TokenIndex, node: *ast.Node } = switch (base.id) {
|
|
.ArrayInitializerDot => blk: {
|
|
const casted = @fieldParentPtr(ast.Node.ArrayInitializerDot, "base", base);
|
|
rtoken = casted.rtoken;
|
|
exprs = casted.list();
|
|
break :blk .{ .dot = casted.dot };
|
|
},
|
|
.ArrayInitializer => blk: {
|
|
const casted = @fieldParentPtr(ast.Node.ArrayInitializer, "base", base);
|
|
rtoken = casted.rtoken;
|
|
exprs = casted.list();
|
|
break :blk .{ .node = casted.lhs };
|
|
},
|
|
else => unreachable,
|
|
};
|
|
|
|
const lbrace = switch (lhs) {
|
|
.dot => |dot| tree.nextToken(dot),
|
|
.node => |node| tree.nextToken(node.lastToken()),
|
|
};
|
|
|
|
if (exprs.len == 0) {
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None),
|
|
}
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None);
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
}
|
|
|
|
if (exprs.len == 1 and tree.token_ids[exprs[0].lastToken() + 1] == .RBrace) {
|
|
const expr = exprs[0];
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None),
|
|
}
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, expr, Space.None);
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
}
|
|
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None),
|
|
}
|
|
|
|
// scan to find row size
|
|
const maybe_row_size: ?usize = blk: {
|
|
var count: usize = 1;
|
|
for (exprs) |expr, i| {
|
|
if (i + 1 < exprs.len) {
|
|
const expr_last_token = expr.lastToken() + 1;
|
|
const loc = tree.tokenLocation(tree.token_locs[expr_last_token].end, exprs[i + 1].firstToken());
|
|
if (loc.line != 0) break :blk count;
|
|
count += 1;
|
|
} else {
|
|
const expr_last_token = expr.lastToken();
|
|
const loc = tree.tokenLocation(tree.token_locs[expr_last_token].end, rtoken);
|
|
if (loc.line == 0) {
|
|
// all on one line
|
|
const src_has_trailing_comma = trailblk: {
|
|
const maybe_comma = tree.prevToken(rtoken);
|
|
break :trailblk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
if (src_has_trailing_comma) {
|
|
break :blk 1; // force row size 1
|
|
} else {
|
|
break :blk null; // no newlines
|
|
}
|
|
}
|
|
break :blk count;
|
|
}
|
|
}
|
|
unreachable;
|
|
};
|
|
|
|
if (maybe_row_size) |row_size| {
|
|
// A place to store the width of each expression and its column's maximum
|
|
var widths = try allocator.alloc(usize, exprs.len + row_size);
|
|
defer allocator.free(widths);
|
|
mem.set(usize, widths, 0);
|
|
|
|
var expr_widths = widths[0 .. widths.len - row_size];
|
|
var column_widths = widths[widths.len - row_size ..];
|
|
|
|
// Null stream for counting the printed length of each expression
|
|
var counting_stream = std.io.countingOutStream(std.io.null_out_stream);
|
|
|
|
for (exprs) |expr, i| {
|
|
counting_stream.bytes_written = 0;
|
|
var dummy_col: usize = 0;
|
|
try renderExpression(allocator, counting_stream.outStream(), tree, indent, &dummy_col, expr, Space.None);
|
|
const width = @intCast(usize, counting_stream.bytes_written);
|
|
const col = i % row_size;
|
|
column_widths[col] = std.math.max(column_widths[col], width);
|
|
expr_widths[i] = width;
|
|
}
|
|
|
|
var new_indent = indent + indent_delta;
|
|
|
|
if (tree.token_ids[tree.nextToken(lbrace)] != .MultilineStringLiteralLine) {
|
|
try renderToken(tree, stream, lbrace, new_indent, start_col, Space.Newline);
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
} else {
|
|
new_indent -= indent_delta;
|
|
try renderToken(tree, stream, lbrace, new_indent, start_col, Space.None);
|
|
}
|
|
|
|
var col: usize = 1;
|
|
for (exprs) |expr, i| {
|
|
if (i + 1 < exprs.len) {
|
|
const next_expr = exprs[i + 1];
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, expr, Space.None);
|
|
|
|
const comma = tree.nextToken(expr.lastToken());
|
|
|
|
if (col != row_size) {
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.Space); // ,
|
|
|
|
const padding = column_widths[i % row_size] - expr_widths[i];
|
|
try stream.writeByteNTimes(' ', padding);
|
|
|
|
col += 1;
|
|
continue;
|
|
}
|
|
col = 1;
|
|
|
|
if (tree.token_ids[tree.nextToken(comma)] != .MultilineStringLiteralLine) {
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.Newline); // ,
|
|
} else {
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.None); // ,
|
|
}
|
|
|
|
try renderExtraNewline(tree, stream, start_col, next_expr);
|
|
if (next_expr.id != .MultilineStringLiteral) {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
}
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, expr, Space.Comma); // ,
|
|
}
|
|
}
|
|
if (exprs[exprs.len - 1].id != .MultilineStringLiteral) {
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
} else {
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Space);
|
|
for (exprs) |expr, i| {
|
|
if (i + 1 < exprs.len) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, expr, Space.None);
|
|
const comma = tree.nextToken(expr.lastToken());
|
|
try renderToken(tree, stream, comma, indent, start_col, Space.Space); // ,
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, expr, Space.Space);
|
|
}
|
|
}
|
|
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
}
|
|
},
|
|
|
|
.StructInitializer, .StructInitializerDot => {
|
|
var rtoken: ast.TokenIndex = undefined;
|
|
var field_inits: []*ast.Node = undefined;
|
|
const lhs: union(enum) { dot: ast.TokenIndex, node: *ast.Node } = switch (base.id) {
|
|
.StructInitializerDot => blk: {
|
|
const casted = @fieldParentPtr(ast.Node.StructInitializerDot, "base", base);
|
|
rtoken = casted.rtoken;
|
|
field_inits = casted.list();
|
|
break :blk .{ .dot = casted.dot };
|
|
},
|
|
.StructInitializer => blk: {
|
|
const casted = @fieldParentPtr(ast.Node.StructInitializer, "base", base);
|
|
rtoken = casted.rtoken;
|
|
field_inits = casted.list();
|
|
break :blk .{ .node = casted.lhs };
|
|
},
|
|
else => unreachable,
|
|
};
|
|
|
|
const lbrace = switch (lhs) {
|
|
.dot => |dot| tree.nextToken(dot),
|
|
.node => |node| tree.nextToken(node.lastToken()),
|
|
};
|
|
|
|
if (field_inits.len == 0) {
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None),
|
|
}
|
|
try renderToken(tree, stream, lbrace, indent + indent_delta, start_col, Space.None);
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
}
|
|
|
|
const src_has_trailing_comma = blk: {
|
|
const maybe_comma = tree.prevToken(rtoken);
|
|
break :blk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
|
|
const src_same_line = blk: {
|
|
const loc = tree.tokenLocation(tree.token_locs[lbrace].end, rtoken);
|
|
break :blk loc.line == 0;
|
|
};
|
|
|
|
const expr_outputs_one_line = blk: {
|
|
// render field expressions until a LF is found
|
|
for (field_inits) |field_init| {
|
|
var find_stream = FindByteOutStream.init('\n');
|
|
var dummy_col: usize = 0;
|
|
try renderExpression(allocator, find_stream.outStream(), tree, 0, &dummy_col, field_init, Space.None);
|
|
if (find_stream.byte_found) break :blk false;
|
|
}
|
|
break :blk true;
|
|
};
|
|
|
|
if (field_inits.len == 1) blk: {
|
|
const field_init = field_inits[0].cast(ast.Node.FieldInitializer).?;
|
|
|
|
switch (field_init.expr.id) {
|
|
.StructInitializer,
|
|
.StructInitializerDot,
|
|
=> break :blk,
|
|
|
|
else => {},
|
|
}
|
|
|
|
// if the expression outputs to multiline, make this struct multiline
|
|
if (!expr_outputs_one_line or src_has_trailing_comma) {
|
|
break :blk;
|
|
}
|
|
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None),
|
|
}
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Space);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, &field_init.base, Space.Space);
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
}
|
|
|
|
if (!src_has_trailing_comma and src_same_line and expr_outputs_one_line) {
|
|
// render all on one line, no trailing comma
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None),
|
|
}
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Space);
|
|
|
|
for (field_inits) |field_init, i| {
|
|
if (i + 1 < field_inits.len) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, field_init, Space.None);
|
|
|
|
const comma = tree.nextToken(field_init.lastToken());
|
|
try renderToken(tree, stream, comma, indent, start_col, Space.Space);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, field_init, Space.Space);
|
|
}
|
|
}
|
|
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
}
|
|
|
|
const new_indent = indent + indent_delta;
|
|
|
|
switch (lhs) {
|
|
.dot => |dot| try renderToken(tree, stream, dot, new_indent, start_col, Space.None),
|
|
.node => |node| try renderExpression(allocator, stream, tree, new_indent, start_col, node, Space.None),
|
|
}
|
|
try renderToken(tree, stream, lbrace, new_indent, start_col, Space.Newline);
|
|
|
|
for (field_inits) |field_init, i| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
if (i + 1 < field_inits.len) {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, field_init, Space.None);
|
|
|
|
const comma = tree.nextToken(field_init.lastToken());
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.Newline);
|
|
|
|
try renderExtraNewline(tree, stream, start_col, field_inits[i + 1]);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, field_init, Space.Comma);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, rtoken, indent, start_col, space);
|
|
},
|
|
|
|
.Call => {
|
|
const call = @fieldParentPtr(ast.Node.Call, "base", base);
|
|
if (call.async_token) |async_token| {
|
|
try renderToken(tree, stream, async_token, indent, start_col, Space.Space);
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, call.lhs, Space.None);
|
|
|
|
const lparen = tree.nextToken(call.lhs.lastToken());
|
|
|
|
if (call.params_len == 0) {
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None);
|
|
return renderToken(tree, stream, call.rtoken, indent, start_col, space);
|
|
}
|
|
|
|
const src_has_trailing_comma = blk: {
|
|
const maybe_comma = tree.prevToken(call.rtoken);
|
|
break :blk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
|
|
if (src_has_trailing_comma) {
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, lparen, new_indent, start_col, Space.Newline);
|
|
|
|
const params = call.params();
|
|
for (params) |param_node, i| {
|
|
const param_node_new_indent = if (param_node.id == .MultilineStringLiteral) blk: {
|
|
break :blk indent;
|
|
} else blk: {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
break :blk new_indent;
|
|
};
|
|
|
|
if (i + 1 < params.len) {
|
|
try renderExpression(allocator, stream, tree, param_node_new_indent, start_col, param_node, Space.None);
|
|
const comma = tree.nextToken(param_node.lastToken());
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.Newline); // ,
|
|
try renderExtraNewline(tree, stream, start_col, params[i + 1]);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, param_node_new_indent, start_col, param_node, Space.Comma);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, call.rtoken, indent, start_col, space);
|
|
}
|
|
}
|
|
}
|
|
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
const params = call.params();
|
|
for (params) |param_node, i| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, param_node, Space.None);
|
|
|
|
if (i + 1 < params.len) {
|
|
const comma = tree.nextToken(param_node.lastToken());
|
|
try renderToken(tree, stream, comma, indent, start_col, Space.Space);
|
|
}
|
|
}
|
|
return renderToken(tree, stream, call.rtoken, indent, start_col, space);
|
|
},
|
|
|
|
.SuffixOp => {
|
|
const suffix_op = @fieldParentPtr(ast.Node.SuffixOp, "base", base);
|
|
|
|
switch (suffix_op.op) {
|
|
.ArrayAccess => |index_expr| {
|
|
const lbracket = tree.nextToken(suffix_op.lhs.lastToken());
|
|
const rbracket = tree.nextToken(index_expr.lastToken());
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
try renderToken(tree, stream, lbracket, indent, start_col, Space.None); // [
|
|
|
|
const starts_with_comment = tree.token_ids[lbracket + 1] == .LineComment;
|
|
const ends_with_comment = tree.token_ids[rbracket - 1] == .LineComment;
|
|
const new_indent = if (ends_with_comment) indent + indent_delta else indent;
|
|
const new_space = if (ends_with_comment) Space.Newline else Space.None;
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, index_expr, new_space);
|
|
if (starts_with_comment) {
|
|
try stream.writeByte('\n');
|
|
}
|
|
if (ends_with_comment or starts_with_comment) {
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
return renderToken(tree, stream, rbracket, indent, start_col, space); // ]
|
|
},
|
|
|
|
.Deref => {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space); // .*
|
|
},
|
|
|
|
.UnwrapOptional => {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
try renderToken(tree, stream, tree.prevToken(suffix_op.rtoken), indent, start_col, Space.None); // .
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space); // ?
|
|
},
|
|
|
|
.Slice => |range| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
|
|
const lbracket = tree.prevToken(range.start.firstToken());
|
|
const dotdot = tree.nextToken(range.start.lastToken());
|
|
|
|
const after_start_space_bool = nodeCausesSliceOpSpace(range.start) or
|
|
(if (range.end) |end| nodeCausesSliceOpSpace(end) else false);
|
|
const after_start_space = if (after_start_space_bool) Space.Space else Space.None;
|
|
const after_op_space = if (range.end != null) after_start_space else Space.None;
|
|
|
|
try renderToken(tree, stream, lbracket, indent, start_col, Space.None); // [
|
|
try renderExpression(allocator, stream, tree, indent, start_col, range.start, after_start_space);
|
|
try renderToken(tree, stream, dotdot, indent, start_col, after_op_space); // ..
|
|
if (range.end) |end| {
|
|
const after_end_space = if (range.sentinel != null) Space.Space else Space.None;
|
|
try renderExpression(allocator, stream, tree, indent, start_col, end, after_end_space);
|
|
}
|
|
if (range.sentinel) |sentinel| {
|
|
const colon = tree.prevToken(sentinel.firstToken());
|
|
try renderToken(tree, stream, colon, indent, start_col, Space.None); // :
|
|
try renderExpression(allocator, stream, tree, indent, start_col, sentinel, Space.None);
|
|
}
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space); // ]
|
|
},
|
|
}
|
|
},
|
|
|
|
.ControlFlowExpression => {
|
|
const flow_expr = @fieldParentPtr(ast.Node.ControlFlowExpression, "base", base);
|
|
|
|
switch (flow_expr.kind) {
|
|
.Break => |maybe_label| {
|
|
if (maybe_label == null and flow_expr.rhs == null) {
|
|
return renderToken(tree, stream, flow_expr.ltoken, indent, start_col, space); // break
|
|
}
|
|
|
|
try renderToken(tree, stream, flow_expr.ltoken, indent, start_col, Space.Space); // break
|
|
if (maybe_label) |label| {
|
|
const colon = tree.nextToken(flow_expr.ltoken);
|
|
try renderToken(tree, stream, colon, indent, start_col, Space.None); // :
|
|
|
|
if (flow_expr.rhs == null) {
|
|
return renderExpression(allocator, stream, tree, indent, start_col, label, space); // label
|
|
}
|
|
try renderExpression(allocator, stream, tree, indent, start_col, label, Space.Space); // label
|
|
}
|
|
},
|
|
.Continue => |maybe_label| {
|
|
assert(flow_expr.rhs == null);
|
|
|
|
if (maybe_label == null and flow_expr.rhs == null) {
|
|
return renderToken(tree, stream, flow_expr.ltoken, indent, start_col, space); // continue
|
|
}
|
|
|
|
try renderToken(tree, stream, flow_expr.ltoken, indent, start_col, Space.Space); // continue
|
|
if (maybe_label) |label| {
|
|
const colon = tree.nextToken(flow_expr.ltoken);
|
|
try renderToken(tree, stream, colon, indent, start_col, Space.None); // :
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, label, space);
|
|
}
|
|
},
|
|
.Return => {
|
|
if (flow_expr.rhs == null) {
|
|
return renderToken(tree, stream, flow_expr.ltoken, indent, start_col, space);
|
|
}
|
|
try renderToken(tree, stream, flow_expr.ltoken, indent, start_col, Space.Space);
|
|
},
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, flow_expr.rhs.?, space);
|
|
},
|
|
|
|
.Payload => {
|
|
const payload = @fieldParentPtr(ast.Node.Payload, "base", base);
|
|
|
|
try renderToken(tree, stream, payload.lpipe, indent, start_col, Space.None);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload.error_symbol, Space.None);
|
|
return renderToken(tree, stream, payload.rpipe, indent, start_col, space);
|
|
},
|
|
|
|
.PointerPayload => {
|
|
const payload = @fieldParentPtr(ast.Node.PointerPayload, "base", base);
|
|
|
|
try renderToken(tree, stream, payload.lpipe, indent, start_col, Space.None);
|
|
if (payload.ptr_token) |ptr_token| {
|
|
try renderToken(tree, stream, ptr_token, indent, start_col, Space.None);
|
|
}
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload.value_symbol, Space.None);
|
|
return renderToken(tree, stream, payload.rpipe, indent, start_col, space);
|
|
},
|
|
|
|
.PointerIndexPayload => {
|
|
const payload = @fieldParentPtr(ast.Node.PointerIndexPayload, "base", base);
|
|
|
|
try renderToken(tree, stream, payload.lpipe, indent, start_col, Space.None);
|
|
if (payload.ptr_token) |ptr_token| {
|
|
try renderToken(tree, stream, ptr_token, indent, start_col, Space.None);
|
|
}
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload.value_symbol, Space.None);
|
|
|
|
if (payload.index_symbol) |index_symbol| {
|
|
const comma = tree.nextToken(payload.value_symbol.lastToken());
|
|
|
|
try renderToken(tree, stream, comma, indent, start_col, Space.Space);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, index_symbol, Space.None);
|
|
}
|
|
|
|
return renderToken(tree, stream, payload.rpipe, indent, start_col, space);
|
|
},
|
|
|
|
.GroupedExpression => {
|
|
const grouped_expr = @fieldParentPtr(ast.Node.GroupedExpression, "base", base);
|
|
|
|
try renderToken(tree, stream, grouped_expr.lparen, indent, start_col, Space.None);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, grouped_expr.expr, Space.None);
|
|
return renderToken(tree, stream, grouped_expr.rparen, indent, start_col, space);
|
|
},
|
|
|
|
.FieldInitializer => {
|
|
const field_init = @fieldParentPtr(ast.Node.FieldInitializer, "base", base);
|
|
|
|
try renderToken(tree, stream, field_init.period_token, indent, start_col, Space.None); // .
|
|
try renderToken(tree, stream, field_init.name_token, indent, start_col, Space.Space); // name
|
|
try renderToken(tree, stream, tree.nextToken(field_init.name_token), indent, start_col, Space.Space); // =
|
|
return renderExpression(allocator, stream, tree, indent, start_col, field_init.expr, space);
|
|
},
|
|
|
|
.IntegerLiteral => {
|
|
const integer_literal = @fieldParentPtr(ast.Node.IntegerLiteral, "base", base);
|
|
return renderToken(tree, stream, integer_literal.token, indent, start_col, space);
|
|
},
|
|
.FloatLiteral => {
|
|
const float_literal = @fieldParentPtr(ast.Node.FloatLiteral, "base", base);
|
|
return renderToken(tree, stream, float_literal.token, indent, start_col, space);
|
|
},
|
|
.StringLiteral => {
|
|
const string_literal = @fieldParentPtr(ast.Node.StringLiteral, "base", base);
|
|
return renderToken(tree, stream, string_literal.token, indent, start_col, space);
|
|
},
|
|
.CharLiteral => {
|
|
const char_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
|
|
return renderToken(tree, stream, char_literal.token, indent, start_col, space);
|
|
},
|
|
.BoolLiteral => {
|
|
const bool_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
|
|
return renderToken(tree, stream, bool_literal.token, indent, start_col, space);
|
|
},
|
|
.NullLiteral => {
|
|
const null_literal = @fieldParentPtr(ast.Node.NullLiteral, "base", base);
|
|
return renderToken(tree, stream, null_literal.token, indent, start_col, space);
|
|
},
|
|
.Unreachable => {
|
|
const unreachable_node = @fieldParentPtr(ast.Node.Unreachable, "base", base);
|
|
return renderToken(tree, stream, unreachable_node.token, indent, start_col, space);
|
|
},
|
|
.ErrorType => {
|
|
const error_type = @fieldParentPtr(ast.Node.ErrorType, "base", base);
|
|
return renderToken(tree, stream, error_type.token, indent, start_col, space);
|
|
},
|
|
.VarType => {
|
|
const var_type = @fieldParentPtr(ast.Node.VarType, "base", base);
|
|
return renderToken(tree, stream, var_type.token, indent, start_col, space);
|
|
},
|
|
.ContainerDecl => {
|
|
const container_decl = @fieldParentPtr(ast.Node.ContainerDecl, "base", base);
|
|
|
|
if (container_decl.layout_token) |layout_token| {
|
|
try renderToken(tree, stream, layout_token, indent, start_col, Space.Space);
|
|
}
|
|
|
|
switch (container_decl.init_arg_expr) {
|
|
.None => {
|
|
try renderToken(tree, stream, container_decl.kind_token, indent, start_col, Space.Space); // union
|
|
},
|
|
.Enum => |enum_tag_type| {
|
|
try renderToken(tree, stream, container_decl.kind_token, indent, start_col, Space.None); // union
|
|
|
|
const lparen = tree.nextToken(container_decl.kind_token);
|
|
const enum_token = tree.nextToken(lparen);
|
|
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
try renderToken(tree, stream, enum_token, indent, start_col, Space.None); // enum
|
|
|
|
if (enum_tag_type) |expr| {
|
|
try renderToken(tree, stream, tree.nextToken(enum_token), indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, expr, Space.None);
|
|
|
|
const rparen = tree.nextToken(expr.lastToken());
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.None); // )
|
|
try renderToken(tree, stream, tree.nextToken(rparen), indent, start_col, Space.Space); // )
|
|
} else {
|
|
try renderToken(tree, stream, tree.nextToken(enum_token), indent, start_col, Space.Space); // )
|
|
}
|
|
},
|
|
.Type => |type_expr| {
|
|
try renderToken(tree, stream, container_decl.kind_token, indent, start_col, Space.None); // union
|
|
|
|
const lparen = tree.nextToken(container_decl.kind_token);
|
|
const rparen = tree.nextToken(type_expr.lastToken());
|
|
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, type_expr, Space.None);
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.Space); // )
|
|
},
|
|
}
|
|
|
|
if (container_decl.fields_and_decls_len == 0) {
|
|
try renderToken(tree, stream, container_decl.lbrace_token, indent + indent_delta, start_col, Space.None); // {
|
|
return renderToken(tree, stream, container_decl.rbrace_token, indent, start_col, space); // }
|
|
}
|
|
|
|
const src_has_trailing_comma = blk: {
|
|
var maybe_comma = tree.prevToken(container_decl.lastToken());
|
|
// Doc comments for a field may also appear after the comma, eg.
|
|
// field_name: T, // comment attached to field_name
|
|
if (tree.token_ids[maybe_comma] == .DocComment)
|
|
maybe_comma = tree.prevToken(maybe_comma);
|
|
break :blk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
|
|
const fields_and_decls = container_decl.fieldsAndDecls();
|
|
|
|
// Check if the first declaration and the { are on the same line
|
|
const src_has_newline = !tree.tokensOnSameLine(
|
|
container_decl.lbrace_token,
|
|
fields_and_decls[0].firstToken(),
|
|
);
|
|
|
|
// We can only print all the elements in-line if all the
|
|
// declarations inside are fields
|
|
const src_has_only_fields = blk: {
|
|
for (fields_and_decls) |decl| {
|
|
if (decl.id != .ContainerField) break :blk false;
|
|
}
|
|
break :blk true;
|
|
};
|
|
|
|
if (src_has_trailing_comma or !src_has_only_fields) {
|
|
// One declaration per line
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, container_decl.lbrace_token, new_indent, start_col, .Newline); // {
|
|
|
|
for (fields_and_decls) |decl, i| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderContainerDecl(allocator, stream, tree, new_indent, start_col, decl, .Newline);
|
|
|
|
if (i + 1 < fields_and_decls.len) {
|
|
try renderExtraNewline(tree, stream, start_col, fields_and_decls[i + 1]);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
} else if (src_has_newline) {
|
|
// All the declarations on the same line, but place the items on
|
|
// their own line
|
|
try renderToken(tree, stream, container_decl.lbrace_token, indent, start_col, .Newline); // {
|
|
|
|
const new_indent = indent + indent_delta;
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
for (fields_and_decls) |decl, i| {
|
|
const space_after_decl: Space = if (i + 1 >= fields_and_decls.len) .Newline else .Space;
|
|
try renderContainerDecl(allocator, stream, tree, new_indent, start_col, decl, space_after_decl);
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
} else {
|
|
// All the declarations on the same line
|
|
try renderToken(tree, stream, container_decl.lbrace_token, indent, start_col, .Space); // {
|
|
|
|
for (fields_and_decls) |decl| {
|
|
try renderContainerDecl(allocator, stream, tree, indent, start_col, decl, .Space);
|
|
}
|
|
}
|
|
|
|
return renderToken(tree, stream, container_decl.rbrace_token, indent, start_col, space); // }
|
|
},
|
|
|
|
.ErrorSetDecl => {
|
|
const err_set_decl = @fieldParentPtr(ast.Node.ErrorSetDecl, "base", base);
|
|
|
|
const lbrace = tree.nextToken(err_set_decl.error_token);
|
|
|
|
if (err_set_decl.decls_len == 0) {
|
|
try renderToken(tree, stream, err_set_decl.error_token, indent, start_col, Space.None);
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None);
|
|
return renderToken(tree, stream, err_set_decl.rbrace_token, indent, start_col, space);
|
|
}
|
|
|
|
if (err_set_decl.decls_len == 1) blk: {
|
|
const node = err_set_decl.decls()[0];
|
|
|
|
// if there are any doc comments or same line comments
|
|
// don't try to put it all on one line
|
|
if (node.cast(ast.Node.ErrorTag)) |tag| {
|
|
if (tag.doc_comments != null) break :blk;
|
|
} else {
|
|
break :blk;
|
|
}
|
|
|
|
try renderToken(tree, stream, err_set_decl.error_token, indent, start_col, Space.None); // error
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None); // {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None);
|
|
return renderToken(tree, stream, err_set_decl.rbrace_token, indent, start_col, space); // }
|
|
}
|
|
|
|
try renderToken(tree, stream, err_set_decl.error_token, indent, start_col, Space.None); // error
|
|
|
|
const src_has_trailing_comma = blk: {
|
|
const maybe_comma = tree.prevToken(err_set_decl.rbrace_token);
|
|
break :blk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
|
|
if (src_has_trailing_comma) {
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Newline); // {
|
|
const new_indent = indent + indent_delta;
|
|
|
|
const decls = err_set_decl.decls();
|
|
for (decls) |node, i| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
if (i + 1 < decls.len) {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, node, Space.None);
|
|
try renderToken(tree, stream, tree.nextToken(node.lastToken()), new_indent, start_col, Space.Newline); // ,
|
|
|
|
try renderExtraNewline(tree, stream, start_col, decls[i + 1]);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, node, Space.Comma);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, err_set_decl.rbrace_token, indent, start_col, space); // }
|
|
} else {
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Space); // {
|
|
|
|
const decls = err_set_decl.decls();
|
|
for (decls) |node, i| {
|
|
if (i + 1 < decls.len) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None);
|
|
|
|
const comma_token = tree.nextToken(node.lastToken());
|
|
assert(tree.token_ids[comma_token] == .Comma);
|
|
try renderToken(tree, stream, comma_token, indent, start_col, Space.Space); // ,
|
|
try renderExtraNewline(tree, stream, start_col, decls[i + 1]);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.Space);
|
|
}
|
|
}
|
|
|
|
return renderToken(tree, stream, err_set_decl.rbrace_token, indent, start_col, space); // }
|
|
}
|
|
},
|
|
|
|
.ErrorTag => {
|
|
const tag = @fieldParentPtr(ast.Node.ErrorTag, "base", base);
|
|
|
|
try renderDocComments(tree, stream, tag, indent, start_col);
|
|
return renderToken(tree, stream, tag.name_token, indent, start_col, space); // name
|
|
},
|
|
|
|
.MultilineStringLiteral => {
|
|
// TODO: Don't indent in this function, but let the caller indent.
|
|
// If this has been implemented, a lot of hacky solutions in i.e. ArrayInit and FunctionCall can be removed
|
|
const multiline_str_literal = @fieldParentPtr(ast.Node.MultilineStringLiteral, "base", base);
|
|
|
|
var skip_first_indent = true;
|
|
if (tree.token_ids[multiline_str_literal.firstToken() - 1] != .LineComment) {
|
|
try stream.print("\n", .{});
|
|
skip_first_indent = false;
|
|
}
|
|
|
|
for (multiline_str_literal.lines()) |t| {
|
|
if (!skip_first_indent) {
|
|
try stream.writeByteNTimes(' ', indent + indent_delta);
|
|
}
|
|
try renderToken(tree, stream, t, indent, start_col, Space.None);
|
|
skip_first_indent = false;
|
|
}
|
|
try stream.writeByteNTimes(' ', indent);
|
|
},
|
|
.UndefinedLiteral => {
|
|
const undefined_literal = @fieldParentPtr(ast.Node.UndefinedLiteral, "base", base);
|
|
return renderToken(tree, stream, undefined_literal.token, indent, start_col, space);
|
|
},
|
|
|
|
.BuiltinCall => {
|
|
const builtin_call = @fieldParentPtr(ast.Node.BuiltinCall, "base", base);
|
|
|
|
try renderToken(tree, stream, builtin_call.builtin_token, indent, start_col, Space.None); // @name
|
|
|
|
const src_params_trailing_comma = blk: {
|
|
if (builtin_call.params_len < 2) break :blk false;
|
|
const last_node = builtin_call.params()[builtin_call.params_len - 1];
|
|
const maybe_comma = tree.nextToken(last_node.lastToken());
|
|
break :blk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
|
|
const lparen = tree.nextToken(builtin_call.builtin_token);
|
|
|
|
if (!src_params_trailing_comma) {
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
// render all on one line, no trailing comma
|
|
const params = builtin_call.params();
|
|
for (params) |param_node, i| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, param_node, Space.None);
|
|
|
|
if (i + 1 < params.len) {
|
|
const comma_token = tree.nextToken(param_node.lastToken());
|
|
try renderToken(tree, stream, comma_token, indent, start_col, Space.Space); // ,
|
|
}
|
|
}
|
|
} else {
|
|
// one param per line
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, lparen, new_indent, start_col, Space.Newline); // (
|
|
|
|
for (builtin_call.params()) |param_node| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, param_node, Space.Comma);
|
|
}
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
|
|
return renderToken(tree, stream, builtin_call.rparen_token, indent, start_col, space); // )
|
|
},
|
|
|
|
.FnProto => {
|
|
const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", base);
|
|
|
|
if (fn_proto.visib_token) |visib_token_index| {
|
|
const visib_token = tree.token_ids[visib_token_index];
|
|
assert(visib_token == .Keyword_pub or visib_token == .Keyword_export);
|
|
|
|
try renderToken(tree, stream, visib_token_index, indent, start_col, Space.Space); // pub
|
|
}
|
|
|
|
if (fn_proto.extern_export_inline_token) |extern_export_inline_token| {
|
|
if (!fn_proto.is_extern_prototype)
|
|
try renderToken(tree, stream, extern_export_inline_token, indent, start_col, Space.Space); // extern/export/inline
|
|
}
|
|
|
|
if (fn_proto.lib_name) |lib_name| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, lib_name, Space.Space);
|
|
}
|
|
|
|
const lparen = if (fn_proto.name_token) |name_token| blk: {
|
|
try renderToken(tree, stream, fn_proto.fn_token, indent, start_col, Space.Space); // fn
|
|
try renderToken(tree, stream, name_token, indent, start_col, Space.None); // name
|
|
break :blk tree.nextToken(name_token);
|
|
} else blk: {
|
|
try renderToken(tree, stream, fn_proto.fn_token, indent, start_col, Space.Space); // fn
|
|
break :blk tree.nextToken(fn_proto.fn_token);
|
|
};
|
|
assert(tree.token_ids[lparen] == .LParen);
|
|
|
|
const rparen = tree.prevToken(
|
|
// the first token for the annotation expressions is the left
|
|
// parenthesis, hence the need for two prevToken
|
|
if (fn_proto.align_expr) |align_expr|
|
|
tree.prevToken(tree.prevToken(align_expr.firstToken()))
|
|
else if (fn_proto.section_expr) |section_expr|
|
|
tree.prevToken(tree.prevToken(section_expr.firstToken()))
|
|
else if (fn_proto.callconv_expr) |callconv_expr|
|
|
tree.prevToken(tree.prevToken(callconv_expr.firstToken()))
|
|
else switch (fn_proto.return_type) {
|
|
.Explicit => |node| node.firstToken(),
|
|
.InferErrorSet => |node| tree.prevToken(node.firstToken()),
|
|
.Invalid => unreachable,
|
|
});
|
|
assert(tree.token_ids[rparen] == .RParen);
|
|
|
|
const src_params_trailing_comma = blk: {
|
|
const maybe_comma = tree.token_ids[rparen - 1];
|
|
break :blk maybe_comma == .Comma or maybe_comma == .LineComment;
|
|
};
|
|
|
|
if (!src_params_trailing_comma) {
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
// render all on one line, no trailing comma
|
|
for (fn_proto.params()) |param_decl, i| {
|
|
try renderParamDecl(allocator, stream, tree, indent, start_col, param_decl, Space.None);
|
|
|
|
if (i + 1 < fn_proto.params_len) {
|
|
const comma = tree.nextToken(param_decl.lastToken());
|
|
try renderToken(tree, stream, comma, indent, start_col, Space.Space); // ,
|
|
}
|
|
}
|
|
} else {
|
|
// one param per line
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, lparen, new_indent, start_col, Space.Newline); // (
|
|
|
|
for (fn_proto.params()) |param_decl| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderParamDecl(allocator, stream, tree, new_indent, start_col, param_decl, Space.Comma);
|
|
}
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.Space); // )
|
|
|
|
if (fn_proto.align_expr) |align_expr| {
|
|
const align_rparen = tree.nextToken(align_expr.lastToken());
|
|
const align_lparen = tree.prevToken(align_expr.firstToken());
|
|
const align_kw = tree.prevToken(align_lparen);
|
|
|
|
try renderToken(tree, stream, align_kw, indent, start_col, Space.None); // align
|
|
try renderToken(tree, stream, align_lparen, indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, align_expr, Space.None);
|
|
try renderToken(tree, stream, align_rparen, indent, start_col, Space.Space); // )
|
|
}
|
|
|
|
if (fn_proto.section_expr) |section_expr| {
|
|
const section_rparen = tree.nextToken(section_expr.lastToken());
|
|
const section_lparen = tree.prevToken(section_expr.firstToken());
|
|
const section_kw = tree.prevToken(section_lparen);
|
|
|
|
try renderToken(tree, stream, section_kw, indent, start_col, Space.None); // section
|
|
try renderToken(tree, stream, section_lparen, indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, section_expr, Space.None);
|
|
try renderToken(tree, stream, section_rparen, indent, start_col, Space.Space); // )
|
|
}
|
|
|
|
if (fn_proto.callconv_expr) |callconv_expr| {
|
|
const callconv_rparen = tree.nextToken(callconv_expr.lastToken());
|
|
const callconv_lparen = tree.prevToken(callconv_expr.firstToken());
|
|
const callconv_kw = tree.prevToken(callconv_lparen);
|
|
|
|
try renderToken(tree, stream, callconv_kw, indent, start_col, Space.None); // callconv
|
|
try renderToken(tree, stream, callconv_lparen, indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, callconv_expr, Space.None);
|
|
try renderToken(tree, stream, callconv_rparen, indent, start_col, Space.Space); // )
|
|
} else if (fn_proto.is_extern_prototype) {
|
|
try stream.writeAll("callconv(.C) ");
|
|
} else if (fn_proto.is_async) {
|
|
try stream.writeAll("callconv(.Async) ");
|
|
}
|
|
|
|
switch (fn_proto.return_type) {
|
|
.Explicit => |node| {
|
|
return renderExpression(allocator, stream, tree, indent, start_col, node, space);
|
|
},
|
|
.InferErrorSet => |node| {
|
|
try renderToken(tree, stream, tree.prevToken(node.firstToken()), indent, start_col, Space.None); // !
|
|
return renderExpression(allocator, stream, tree, indent, start_col, node, space);
|
|
},
|
|
.Invalid => unreachable,
|
|
}
|
|
},
|
|
|
|
.AnyFrameType => {
|
|
const anyframe_type = @fieldParentPtr(ast.Node.AnyFrameType, "base", base);
|
|
|
|
if (anyframe_type.result) |result| {
|
|
try renderToken(tree, stream, anyframe_type.anyframe_token, indent, start_col, Space.None); // anyframe
|
|
try renderToken(tree, stream, result.arrow_token, indent, start_col, Space.None); // ->
|
|
return renderExpression(allocator, stream, tree, indent, start_col, result.return_type, space);
|
|
} else {
|
|
return renderToken(tree, stream, anyframe_type.anyframe_token, indent, start_col, space); // anyframe
|
|
}
|
|
},
|
|
|
|
.DocComment => unreachable, // doc comments are attached to nodes
|
|
|
|
.Switch => {
|
|
const switch_node = @fieldParentPtr(ast.Node.Switch, "base", base);
|
|
|
|
try renderToken(tree, stream, switch_node.switch_token, indent, start_col, Space.Space); // switch
|
|
try renderToken(tree, stream, tree.nextToken(switch_node.switch_token), indent, start_col, Space.None); // (
|
|
|
|
const rparen = tree.nextToken(switch_node.expr.lastToken());
|
|
const lbrace = tree.nextToken(rparen);
|
|
|
|
if (switch_node.cases_len == 0) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, switch_node.expr, Space.None);
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.Space); // )
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None); // {
|
|
return renderToken(tree, stream, switch_node.rbrace, indent, start_col, space); // }
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, switch_node.expr, Space.None);
|
|
|
|
const new_indent = indent + indent_delta;
|
|
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.Space); // )
|
|
try renderToken(tree, stream, lbrace, new_indent, start_col, Space.Newline); // {
|
|
|
|
const cases = switch_node.cases();
|
|
for (cases) |node, i| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, node, Space.Comma);
|
|
|
|
if (i + 1 < cases.len) {
|
|
try renderExtraNewline(tree, stream, start_col, cases[i + 1]);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, switch_node.rbrace, indent, start_col, space); // }
|
|
},
|
|
|
|
.SwitchCase => {
|
|
const switch_case = @fieldParentPtr(ast.Node.SwitchCase, "base", base);
|
|
|
|
assert(switch_case.items_len != 0);
|
|
const src_has_trailing_comma = blk: {
|
|
const last_node = switch_case.items()[switch_case.items_len - 1];
|
|
const maybe_comma = tree.nextToken(last_node.lastToken());
|
|
break :blk tree.token_ids[maybe_comma] == .Comma;
|
|
};
|
|
|
|
if (switch_case.items_len == 1 or !src_has_trailing_comma) {
|
|
const items = switch_case.items();
|
|
for (items) |node, i| {
|
|
if (i + 1 < items.len) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None);
|
|
|
|
const comma_token = tree.nextToken(node.lastToken());
|
|
try renderToken(tree, stream, comma_token, indent, start_col, Space.Space); // ,
|
|
try renderExtraNewline(tree, stream, start_col, items[i + 1]);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.Space);
|
|
}
|
|
}
|
|
} else {
|
|
const items = switch_case.items();
|
|
for (items) |node, i| {
|
|
if (i + 1 < items.len) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.None);
|
|
|
|
const comma_token = tree.nextToken(node.lastToken());
|
|
try renderToken(tree, stream, comma_token, indent, start_col, Space.Newline); // ,
|
|
try renderExtraNewline(tree, stream, start_col, items[i + 1]);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node, Space.Comma);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
}
|
|
}
|
|
|
|
try renderToken(tree, stream, switch_case.arrow_token, indent, start_col, Space.Space); // =>
|
|
|
|
if (switch_case.payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, switch_case.expr, space);
|
|
},
|
|
.SwitchElse => {
|
|
const switch_else = @fieldParentPtr(ast.Node.SwitchElse, "base", base);
|
|
return renderToken(tree, stream, switch_else.token, indent, start_col, space);
|
|
},
|
|
.Else => {
|
|
const else_node = @fieldParentPtr(ast.Node.Else, "base", base);
|
|
|
|
const body_is_block = nodeIsBlock(else_node.body);
|
|
const same_line = body_is_block or tree.tokensOnSameLine(else_node.else_token, else_node.body.lastToken());
|
|
|
|
const after_else_space = if (same_line or else_node.payload != null) Space.Space else Space.Newline;
|
|
try renderToken(tree, stream, else_node.else_token, indent, start_col, after_else_space);
|
|
|
|
if (else_node.payload) |payload| {
|
|
const payload_space = if (same_line) Space.Space else Space.Newline;
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, payload_space);
|
|
}
|
|
|
|
if (same_line) {
|
|
return renderExpression(allocator, stream, tree, indent, start_col, else_node.body, space);
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent + indent_delta);
|
|
start_col.* = indent + indent_delta;
|
|
return renderExpression(allocator, stream, tree, indent, start_col, else_node.body, space);
|
|
},
|
|
|
|
.While => {
|
|
const while_node = @fieldParentPtr(ast.Node.While, "base", base);
|
|
|
|
if (while_node.label) |label| {
|
|
try renderToken(tree, stream, label, indent, start_col, Space.None); // label
|
|
try renderToken(tree, stream, tree.nextToken(label), indent, start_col, Space.Space); // :
|
|
}
|
|
|
|
if (while_node.inline_token) |inline_token| {
|
|
try renderToken(tree, stream, inline_token, indent, start_col, Space.Space); // inline
|
|
}
|
|
|
|
try renderToken(tree, stream, while_node.while_token, indent, start_col, Space.Space); // while
|
|
try renderToken(tree, stream, tree.nextToken(while_node.while_token), indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, while_node.condition, Space.None);
|
|
|
|
const cond_rparen = tree.nextToken(while_node.condition.lastToken());
|
|
|
|
const body_is_block = nodeIsBlock(while_node.body);
|
|
|
|
var block_start_space: Space = undefined;
|
|
var after_body_space: Space = undefined;
|
|
|
|
if (body_is_block) {
|
|
block_start_space = Space.BlockStart;
|
|
after_body_space = if (while_node.@"else" == null) space else Space.SpaceOrOutdent;
|
|
} else if (tree.tokensOnSameLine(cond_rparen, while_node.body.lastToken())) {
|
|
block_start_space = Space.Space;
|
|
after_body_space = if (while_node.@"else" == null) space else Space.Space;
|
|
} else {
|
|
block_start_space = Space.Newline;
|
|
after_body_space = if (while_node.@"else" == null) space else Space.Newline;
|
|
}
|
|
|
|
{
|
|
const rparen_space = if (while_node.payload != null or while_node.continue_expr != null) Space.Space else block_start_space;
|
|
try renderToken(tree, stream, cond_rparen, indent, start_col, rparen_space); // )
|
|
}
|
|
|
|
if (while_node.payload) |payload| {
|
|
const payload_space = if (while_node.continue_expr != null) Space.Space else block_start_space;
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, payload_space);
|
|
}
|
|
|
|
if (while_node.continue_expr) |continue_expr| {
|
|
const rparen = tree.nextToken(continue_expr.lastToken());
|
|
const lparen = tree.prevToken(continue_expr.firstToken());
|
|
const colon = tree.prevToken(lparen);
|
|
|
|
try renderToken(tree, stream, colon, indent, start_col, Space.Space); // :
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, continue_expr, Space.None);
|
|
|
|
try renderToken(tree, stream, rparen, indent, start_col, block_start_space); // )
|
|
}
|
|
|
|
var new_indent = indent;
|
|
if (block_start_space == Space.Newline) {
|
|
new_indent += indent_delta;
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
start_col.* = new_indent;
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, while_node.body, after_body_space);
|
|
|
|
if (while_node.@"else") |@"else"| {
|
|
if (after_body_space == Space.Newline) {
|
|
try stream.writeByteNTimes(' ', indent);
|
|
start_col.* = indent;
|
|
}
|
|
return renderExpression(allocator, stream, tree, indent, start_col, &@"else".base, space);
|
|
}
|
|
},
|
|
|
|
.For => {
|
|
const for_node = @fieldParentPtr(ast.Node.For, "base", base);
|
|
|
|
if (for_node.label) |label| {
|
|
try renderToken(tree, stream, label, indent, start_col, Space.None); // label
|
|
try renderToken(tree, stream, tree.nextToken(label), indent, start_col, Space.Space); // :
|
|
}
|
|
|
|
if (for_node.inline_token) |inline_token| {
|
|
try renderToken(tree, stream, inline_token, indent, start_col, Space.Space); // inline
|
|
}
|
|
|
|
try renderToken(tree, stream, for_node.for_token, indent, start_col, Space.Space); // for
|
|
try renderToken(tree, stream, tree.nextToken(for_node.for_token), indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, for_node.array_expr, Space.None);
|
|
|
|
const rparen = tree.nextToken(for_node.array_expr.lastToken());
|
|
|
|
const body_is_block = for_node.body.id == .Block;
|
|
const src_one_line_to_body = !body_is_block and tree.tokensOnSameLine(rparen, for_node.body.firstToken());
|
|
const body_on_same_line = body_is_block or src_one_line_to_body;
|
|
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.Space); // )
|
|
|
|
const space_after_payload = if (body_on_same_line) Space.Space else Space.Newline;
|
|
try renderExpression(allocator, stream, tree, indent, start_col, for_node.payload, space_after_payload); // |x|
|
|
|
|
const space_after_body = blk: {
|
|
if (for_node.@"else") |@"else"| {
|
|
const src_one_line_to_else = tree.tokensOnSameLine(rparen, @"else".firstToken());
|
|
if (body_is_block or src_one_line_to_else) {
|
|
break :blk Space.Space;
|
|
} else {
|
|
break :blk Space.Newline;
|
|
}
|
|
} else {
|
|
break :blk space;
|
|
}
|
|
};
|
|
|
|
const body_indent = if (body_on_same_line) indent else indent + indent_delta;
|
|
if (!body_on_same_line) try stream.writeByteNTimes(' ', body_indent);
|
|
try renderExpression(allocator, stream, tree, body_indent, start_col, for_node.body, space_after_body); // { body }
|
|
|
|
if (for_node.@"else") |@"else"| {
|
|
if (space_after_body == Space.Newline) try stream.writeByteNTimes(' ', indent);
|
|
return renderExpression(allocator, stream, tree, indent, start_col, &@"else".base, space); // else
|
|
}
|
|
},
|
|
|
|
.If => {
|
|
const if_node = @fieldParentPtr(ast.Node.If, "base", base);
|
|
|
|
const lparen = tree.nextToken(if_node.if_token);
|
|
const rparen = tree.nextToken(if_node.condition.lastToken());
|
|
|
|
try renderToken(tree, stream, if_node.if_token, indent, start_col, Space.Space); // if
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, if_node.condition, Space.None); // condition
|
|
|
|
const body_is_if_block = if_node.body.id == .If;
|
|
const body_is_block = nodeIsBlock(if_node.body);
|
|
|
|
if (body_is_if_block) {
|
|
try renderExtraNewline(tree, stream, start_col, if_node.body);
|
|
} else if (body_is_block) {
|
|
const after_rparen_space = if (if_node.payload == null) Space.BlockStart else Space.Space;
|
|
try renderToken(tree, stream, rparen, indent, start_col, after_rparen_space); // )
|
|
|
|
if (if_node.payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.BlockStart); // |x|
|
|
}
|
|
|
|
if (if_node.@"else") |@"else"| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, if_node.body, Space.SpaceOrOutdent);
|
|
return renderExpression(allocator, stream, tree, indent, start_col, &@"else".base, space);
|
|
} else {
|
|
return renderExpression(allocator, stream, tree, indent, start_col, if_node.body, space);
|
|
}
|
|
}
|
|
|
|
const src_has_newline = !tree.tokensOnSameLine(rparen, if_node.body.lastToken());
|
|
|
|
if (src_has_newline) {
|
|
const after_rparen_space = if (if_node.payload == null) Space.Newline else Space.Space;
|
|
try renderToken(tree, stream, rparen, indent, start_col, after_rparen_space); // )
|
|
|
|
if (if_node.payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Newline);
|
|
}
|
|
|
|
const new_indent = indent + indent_delta;
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
if (if_node.@"else") |@"else"| {
|
|
const else_is_block = nodeIsBlock(@"else".body);
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, if_node.body, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
|
|
if (else_is_block) {
|
|
try renderToken(tree, stream, @"else".else_token, indent, start_col, Space.Space); // else
|
|
|
|
if (@"else".payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, @"else".body, space);
|
|
} else {
|
|
const after_else_space = if (@"else".payload == null) Space.Newline else Space.Space;
|
|
try renderToken(tree, stream, @"else".else_token, indent, start_col, after_else_space); // else
|
|
|
|
if (@"else".payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Newline);
|
|
}
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
return renderExpression(allocator, stream, tree, new_indent, start_col, @"else".body, space);
|
|
}
|
|
} else {
|
|
return renderExpression(allocator, stream, tree, new_indent, start_col, if_node.body, space);
|
|
}
|
|
}
|
|
|
|
try renderToken(tree, stream, rparen, indent, start_col, Space.Space); // )
|
|
|
|
if (if_node.payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
|
|
}
|
|
|
|
if (if_node.@"else") |@"else"| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, if_node.body, Space.Space);
|
|
try renderToken(tree, stream, @"else".else_token, indent, start_col, Space.Space);
|
|
|
|
if (@"else".payload) |payload| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, @"else".body, space);
|
|
} else {
|
|
return renderExpression(allocator, stream, tree, indent, start_col, if_node.body, space);
|
|
}
|
|
},
|
|
|
|
.Asm => {
|
|
const asm_node = @fieldParentPtr(ast.Node.Asm, "base", base);
|
|
|
|
try renderToken(tree, stream, asm_node.asm_token, indent, start_col, Space.Space); // asm
|
|
|
|
if (asm_node.volatile_token) |volatile_token| {
|
|
try renderToken(tree, stream, volatile_token, indent, start_col, Space.Space); // volatile
|
|
try renderToken(tree, stream, tree.nextToken(volatile_token), indent, start_col, Space.None); // (
|
|
} else {
|
|
try renderToken(tree, stream, tree.nextToken(asm_node.asm_token), indent, start_col, Space.None); // (
|
|
}
|
|
|
|
if (asm_node.outputs.len == 0 and asm_node.inputs.len == 0 and asm_node.clobbers.len == 0) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_node.template, Space.None);
|
|
return renderToken(tree, stream, asm_node.rparen, indent, start_col, space);
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_node.template, Space.Newline);
|
|
|
|
const indent_once = indent + indent_delta;
|
|
|
|
if (asm_node.template.id == .MultilineStringLiteral) {
|
|
// After rendering a multiline string literal the cursor is
|
|
// already offset by indent
|
|
try stream.writeByteNTimes(' ', indent_delta);
|
|
} else {
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
}
|
|
|
|
const colon1 = tree.nextToken(asm_node.template.lastToken());
|
|
const indent_extra = indent_once + 2;
|
|
|
|
const colon2 = if (asm_node.outputs.len == 0) blk: {
|
|
try renderToken(tree, stream, colon1, indent, start_col, Space.Newline); // :
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
|
|
break :blk tree.nextToken(colon1);
|
|
} else blk: {
|
|
try renderToken(tree, stream, colon1, indent, start_col, Space.Space); // :
|
|
|
|
for (asm_node.outputs) |*asm_output, i| {
|
|
if (i + 1 < asm_node.outputs.len) {
|
|
const next_asm_output = asm_node.outputs[i + 1];
|
|
try renderAsmOutput(allocator, stream, tree, indent_extra, start_col, asm_output, Space.None);
|
|
|
|
const comma = tree.prevToken(next_asm_output.firstToken());
|
|
try renderToken(tree, stream, comma, indent_extra, start_col, Space.Newline); // ,
|
|
try renderExtraNewlineToken(tree, stream, start_col, next_asm_output.firstToken());
|
|
|
|
try stream.writeByteNTimes(' ', indent_extra);
|
|
} else if (asm_node.inputs.len == 0 and asm_node.clobbers.len == 0) {
|
|
try renderAsmOutput(allocator, stream, tree, indent_extra, start_col, asm_output, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, asm_node.rparen, indent, start_col, space);
|
|
} else {
|
|
try renderAsmOutput(allocator, stream, tree, indent_extra, start_col, asm_output, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
const comma_or_colon = tree.nextToken(asm_output.lastToken());
|
|
break :blk switch (tree.token_ids[comma_or_colon]) {
|
|
.Comma => tree.nextToken(comma_or_colon),
|
|
else => comma_or_colon,
|
|
};
|
|
}
|
|
}
|
|
unreachable;
|
|
};
|
|
|
|
const colon3 = if (asm_node.inputs.len == 0) blk: {
|
|
try renderToken(tree, stream, colon2, indent, start_col, Space.Newline); // :
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
|
|
break :blk tree.nextToken(colon2);
|
|
} else blk: {
|
|
try renderToken(tree, stream, colon2, indent, start_col, Space.Space); // :
|
|
|
|
for (asm_node.inputs) |*asm_input, i| {
|
|
if (i + 1 < asm_node.inputs.len) {
|
|
const next_asm_input = &asm_node.inputs[i + 1];
|
|
try renderAsmInput(allocator, stream, tree, indent_extra, start_col, asm_input, Space.None);
|
|
|
|
const comma = tree.prevToken(next_asm_input.firstToken());
|
|
try renderToken(tree, stream, comma, indent_extra, start_col, Space.Newline); // ,
|
|
try renderExtraNewlineToken(tree, stream, start_col, next_asm_input.firstToken());
|
|
|
|
try stream.writeByteNTimes(' ', indent_extra);
|
|
} else if (asm_node.clobbers.len == 0) {
|
|
try renderAsmInput(allocator, stream, tree, indent_extra, start_col, asm_input, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, asm_node.rparen, indent, start_col, space); // )
|
|
} else {
|
|
try renderAsmInput(allocator, stream, tree, indent_extra, start_col, asm_input, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
const comma_or_colon = tree.nextToken(asm_input.lastToken());
|
|
break :blk switch (tree.token_ids[comma_or_colon]) {
|
|
.Comma => tree.nextToken(comma_or_colon),
|
|
else => comma_or_colon,
|
|
};
|
|
}
|
|
}
|
|
unreachable;
|
|
};
|
|
|
|
try renderToken(tree, stream, colon3, indent, start_col, Space.Space); // :
|
|
|
|
for (asm_node.clobbers) |clobber_node, i| {
|
|
if (i + 1 >= asm_node.clobbers.len) {
|
|
try renderExpression(allocator, stream, tree, indent_extra, start_col, clobber_node, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, asm_node.rparen, indent, start_col, space);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent_extra, start_col, clobber_node, Space.None);
|
|
const comma = tree.nextToken(clobber_node.lastToken());
|
|
try renderToken(tree, stream, comma, indent_once, start_col, Space.Space); // ,
|
|
}
|
|
}
|
|
},
|
|
|
|
.EnumLiteral => {
|
|
const enum_literal = @fieldParentPtr(ast.Node.EnumLiteral, "base", base);
|
|
|
|
try renderToken(tree, stream, enum_literal.dot, indent, start_col, Space.None); // .
|
|
return renderToken(tree, stream, enum_literal.name, indent, start_col, space); // name
|
|
},
|
|
|
|
.ContainerField,
|
|
.Root,
|
|
.VarDecl,
|
|
.Use,
|
|
.TestDecl,
|
|
=> unreachable,
|
|
}
|
|
}
|
|
|
|
fn renderAsmOutput(
|
|
allocator: *mem.Allocator,
|
|
stream: var,
|
|
tree: *ast.Tree,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
asm_output: *const ast.Node.Asm.Output,
|
|
space: Space,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
try stream.writeAll("[");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_output.symbolic_name, Space.None);
|
|
try stream.writeAll("] ");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_output.constraint, Space.None);
|
|
try stream.writeAll(" (");
|
|
|
|
switch (asm_output.kind) {
|
|
ast.Node.Asm.Output.Kind.Variable => |variable_name| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, &variable_name.base, Space.None);
|
|
},
|
|
ast.Node.Asm.Output.Kind.Return => |return_type| {
|
|
try stream.writeAll("-> ");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, return_type, Space.None);
|
|
},
|
|
}
|
|
|
|
return renderToken(tree, stream, asm_output.lastToken(), indent, start_col, space); // )
|
|
}
|
|
|
|
fn renderAsmInput(
|
|
allocator: *mem.Allocator,
|
|
stream: var,
|
|
tree: *ast.Tree,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
asm_input: *const ast.Node.Asm.Input,
|
|
space: Space,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
try stream.writeAll("[");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_input.symbolic_name, Space.None);
|
|
try stream.writeAll("] ");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_input.constraint, Space.None);
|
|
try stream.writeAll(" (");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_input.expr, Space.None);
|
|
return renderToken(tree, stream, asm_input.lastToken(), indent, start_col, space); // )
|
|
}
|
|
|
|
fn renderVarDecl(
|
|
allocator: *mem.Allocator,
|
|
stream: var,
|
|
tree: *ast.Tree,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
var_decl: *ast.Node.VarDecl,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
if (var_decl.visib_token) |visib_token| {
|
|
try renderToken(tree, stream, visib_token, indent, start_col, Space.Space); // pub
|
|
}
|
|
|
|
if (var_decl.extern_export_token) |extern_export_token| {
|
|
try renderToken(tree, stream, extern_export_token, indent, start_col, Space.Space); // extern
|
|
|
|
if (var_decl.lib_name) |lib_name| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, lib_name, Space.Space); // "lib"
|
|
}
|
|
}
|
|
|
|
if (var_decl.comptime_token) |comptime_token| {
|
|
try renderToken(tree, stream, comptime_token, indent, start_col, Space.Space); // comptime
|
|
}
|
|
|
|
if (var_decl.thread_local_token) |thread_local_token| {
|
|
try renderToken(tree, stream, thread_local_token, indent, start_col, Space.Space); // threadlocal
|
|
}
|
|
try renderToken(tree, stream, var_decl.mut_token, indent, start_col, Space.Space); // var
|
|
|
|
const name_space = if (var_decl.type_node == null and (var_decl.align_node != null or
|
|
var_decl.section_node != null or var_decl.init_node != null)) Space.Space else Space.None;
|
|
try renderToken(tree, stream, var_decl.name_token, indent, start_col, name_space);
|
|
|
|
if (var_decl.type_node) |type_node| {
|
|
try renderToken(tree, stream, tree.nextToken(var_decl.name_token), indent, start_col, Space.Space);
|
|
const s = if (var_decl.align_node != null or
|
|
var_decl.section_node != null or
|
|
var_decl.init_node != null) Space.Space else Space.None;
|
|
try renderExpression(allocator, stream, tree, indent, start_col, type_node, s);
|
|
}
|
|
|
|
if (var_decl.align_node) |align_node| {
|
|
const lparen = tree.prevToken(align_node.firstToken());
|
|
const align_kw = tree.prevToken(lparen);
|
|
const rparen = tree.nextToken(align_node.lastToken());
|
|
try renderToken(tree, stream, align_kw, indent, start_col, Space.None); // align
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, align_node, Space.None);
|
|
const s = if (var_decl.section_node != null or var_decl.init_node != null) Space.Space else Space.None;
|
|
try renderToken(tree, stream, rparen, indent, start_col, s); // )
|
|
}
|
|
|
|
if (var_decl.section_node) |section_node| {
|
|
const lparen = tree.prevToken(section_node.firstToken());
|
|
const section_kw = tree.prevToken(lparen);
|
|
const rparen = tree.nextToken(section_node.lastToken());
|
|
try renderToken(tree, stream, section_kw, indent, start_col, Space.None); // linksection
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
try renderExpression(allocator, stream, tree, indent, start_col, section_node, Space.None);
|
|
const s = if (var_decl.init_node != null) Space.Space else Space.None;
|
|
try renderToken(tree, stream, rparen, indent, start_col, s); // )
|
|
}
|
|
|
|
if (var_decl.init_node) |init_node| {
|
|
const s = if (init_node.id == .MultilineStringLiteral) Space.None else Space.Space;
|
|
try renderToken(tree, stream, var_decl.eq_token.?, indent, start_col, s); // =
|
|
try renderExpression(allocator, stream, tree, indent, start_col, init_node, Space.None);
|
|
}
|
|
|
|
try renderToken(tree, stream, var_decl.semicolon_token, indent, start_col, Space.Newline);
|
|
}
|
|
|
|
fn renderParamDecl(
|
|
allocator: *mem.Allocator,
|
|
stream: var,
|
|
tree: *ast.Tree,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
param_decl: ast.Node.FnProto.ParamDecl,
|
|
space: Space,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
try renderDocComments(tree, stream, param_decl, indent, start_col);
|
|
|
|
if (param_decl.comptime_token) |comptime_token| {
|
|
try renderToken(tree, stream, comptime_token, indent, start_col, Space.Space);
|
|
}
|
|
if (param_decl.noalias_token) |noalias_token| {
|
|
try renderToken(tree, stream, noalias_token, indent, start_col, Space.Space);
|
|
}
|
|
if (param_decl.name_token) |name_token| {
|
|
try renderToken(tree, stream, name_token, indent, start_col, Space.None);
|
|
try renderToken(tree, stream, tree.nextToken(name_token), indent, start_col, Space.Space); // :
|
|
}
|
|
switch (param_decl.param_type) {
|
|
.var_args => |token| try renderToken(tree, stream, token, indent, start_col, space),
|
|
.var_type, .type_expr => |node| try renderExpression(allocator, stream, tree, indent, start_col, node, space),
|
|
}
|
|
}
|
|
|
|
fn renderStatement(
|
|
allocator: *mem.Allocator,
|
|
stream: var,
|
|
tree: *ast.Tree,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
base: *ast.Node,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
switch (base.id) {
|
|
.VarDecl => {
|
|
const var_decl = @fieldParentPtr(ast.Node.VarDecl, "base", base);
|
|
try renderVarDecl(allocator, stream, tree, indent, start_col, var_decl);
|
|
},
|
|
else => {
|
|
if (base.requireSemiColon()) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, base, Space.None);
|
|
|
|
const semicolon_index = tree.nextToken(base.lastToken());
|
|
assert(tree.token_ids[semicolon_index] == .Semicolon);
|
|
try renderToken(tree, stream, semicolon_index, indent, start_col, Space.Newline);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, base, Space.Newline);
|
|
}
|
|
},
|
|
}
|
|
}
|
|
|
|
const Space = enum {
|
|
None,
|
|
Newline,
|
|
Comma,
|
|
Space,
|
|
SpaceOrOutdent,
|
|
NoNewline,
|
|
NoComment,
|
|
BlockStart,
|
|
};
|
|
|
|
fn renderTokenOffset(
|
|
tree: *ast.Tree,
|
|
stream: var,
|
|
token_index: ast.TokenIndex,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
space: Space,
|
|
token_skip_bytes: usize,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
if (space == Space.BlockStart) {
|
|
if (start_col.* < indent + indent_delta)
|
|
return renderToken(tree, stream, token_index, indent, start_col, Space.Space);
|
|
try renderToken(tree, stream, token_index, indent, start_col, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
start_col.* = indent;
|
|
return;
|
|
}
|
|
|
|
var token_loc = tree.token_locs[token_index];
|
|
try stream.writeAll(mem.trimRight(u8, tree.tokenSliceLoc(token_loc)[token_skip_bytes..], " "));
|
|
|
|
if (space == Space.NoComment)
|
|
return;
|
|
|
|
var next_token_id = tree.token_ids[token_index + 1];
|
|
var next_token_loc = tree.token_locs[token_index + 1];
|
|
|
|
if (space == Space.Comma) switch (next_token_id) {
|
|
.Comma => return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline),
|
|
.LineComment => {
|
|
try stream.writeAll(", ");
|
|
return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline);
|
|
},
|
|
else => {
|
|
if (token_index + 2 < tree.token_ids.len and
|
|
tree.token_ids[token_index + 2] == .MultilineStringLiteralLine)
|
|
{
|
|
try stream.writeAll(",");
|
|
return;
|
|
} else {
|
|
try stream.writeAll(",\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
};
|
|
|
|
// Skip over same line doc comments
|
|
var offset: usize = 1;
|
|
if (next_token_id == .DocComment) {
|
|
const loc = tree.tokenLocationLoc(token_loc.end, next_token_loc);
|
|
if (loc.line == 0) {
|
|
offset += 1;
|
|
next_token_id = tree.token_ids[token_index + offset];
|
|
next_token_loc = tree.token_locs[token_index + offset];
|
|
}
|
|
}
|
|
|
|
if (next_token_id != .LineComment) blk: {
|
|
switch (space) {
|
|
Space.None, Space.NoNewline => return,
|
|
Space.Newline => {
|
|
if (next_token_id == .MultilineStringLiteralLine) {
|
|
return;
|
|
} else {
|
|
try stream.writeAll("\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
Space.Space, Space.SpaceOrOutdent => {
|
|
if (next_token_id == .MultilineStringLiteralLine)
|
|
return;
|
|
try stream.writeByte(' ');
|
|
return;
|
|
},
|
|
Space.NoComment, Space.Comma, Space.BlockStart => unreachable,
|
|
}
|
|
}
|
|
|
|
while (true) {
|
|
const comment_is_empty = mem.trimRight(u8, tree.tokenSliceLoc(next_token_loc), " ").len == 2;
|
|
if (comment_is_empty) {
|
|
switch (space) {
|
|
Space.Newline => {
|
|
offset += 1;
|
|
token_loc = next_token_loc;
|
|
next_token_id = tree.token_ids[token_index + offset];
|
|
next_token_loc = tree.token_locs[token_index + offset];
|
|
if (next_token_id != .LineComment) {
|
|
try stream.writeByte('\n');
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
else => break,
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
var loc = tree.tokenLocationLoc(token_loc.end, next_token_loc);
|
|
if (loc.line == 0) {
|
|
try stream.print(" {}", .{mem.trimRight(u8, tree.tokenSliceLoc(next_token_loc), " ")});
|
|
offset = 2;
|
|
token_loc = next_token_loc;
|
|
next_token_loc = tree.token_locs[token_index + offset];
|
|
next_token_id = tree.token_ids[token_index + offset];
|
|
if (next_token_id != .LineComment) {
|
|
switch (space) {
|
|
Space.None, Space.Space => {
|
|
try stream.writeByte('\n');
|
|
const after_comment_token = tree.token_ids[token_index + offset];
|
|
const next_line_indent = switch (after_comment_token) {
|
|
.RParen, .RBrace, .RBracket => indent,
|
|
else => indent + indent_delta,
|
|
};
|
|
try stream.writeByteNTimes(' ', next_line_indent);
|
|
start_col.* = next_line_indent;
|
|
},
|
|
Space.SpaceOrOutdent => {
|
|
try stream.writeByte('\n');
|
|
try stream.writeByteNTimes(' ', indent);
|
|
start_col.* = indent;
|
|
},
|
|
Space.Newline => {
|
|
if (next_token_id == .MultilineStringLiteralLine) {
|
|
return;
|
|
} else {
|
|
try stream.writeAll("\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
Space.NoNewline => {},
|
|
Space.NoComment, Space.Comma, Space.BlockStart => unreachable,
|
|
}
|
|
return;
|
|
}
|
|
loc = tree.tokenLocationLoc(token_loc.end, next_token_loc);
|
|
}
|
|
|
|
while (true) {
|
|
// translate-c doesn't generate correct newlines
|
|
// in generated code (loc.line == 0) so treat that case
|
|
// as though there was meant to be a newline between the tokens
|
|
const newline_count = if (loc.line <= 1) @as(u8, 1) else @as(u8, 2);
|
|
try stream.writeByteNTimes('\n', newline_count);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
try stream.writeAll(mem.trimRight(u8, tree.tokenSliceLoc(next_token_loc), " "));
|
|
|
|
offset += 1;
|
|
token_loc = next_token_loc;
|
|
next_token_loc = tree.token_locs[token_index + offset];
|
|
next_token_id = tree.token_ids[token_index + offset];
|
|
if (next_token_id != .LineComment) {
|
|
switch (space) {
|
|
Space.Newline => {
|
|
if (next_token_id == .MultilineStringLiteralLine) {
|
|
return;
|
|
} else {
|
|
try stream.writeAll("\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
Space.None, Space.Space => {
|
|
try stream.writeByte('\n');
|
|
|
|
const after_comment_token = tree.token_ids[token_index + offset];
|
|
const next_line_indent = switch (after_comment_token) {
|
|
.RParen, .RBrace, .RBracket => blk: {
|
|
if (indent > indent_delta) {
|
|
break :blk indent - indent_delta;
|
|
} else {
|
|
break :blk 0;
|
|
}
|
|
},
|
|
else => indent,
|
|
};
|
|
try stream.writeByteNTimes(' ', next_line_indent);
|
|
start_col.* = next_line_indent;
|
|
},
|
|
Space.SpaceOrOutdent => {
|
|
try stream.writeByte('\n');
|
|
try stream.writeByteNTimes(' ', indent);
|
|
start_col.* = indent;
|
|
},
|
|
Space.NoNewline => {},
|
|
Space.NoComment, Space.Comma, Space.BlockStart => unreachable,
|
|
}
|
|
return;
|
|
}
|
|
loc = tree.tokenLocationLoc(token_loc.end, next_token_loc);
|
|
}
|
|
}
|
|
|
|
fn renderToken(
|
|
tree: *ast.Tree,
|
|
stream: var,
|
|
token_index: ast.TokenIndex,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
space: Space,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
return renderTokenOffset(tree, stream, token_index, indent, start_col, space, 0);
|
|
}
|
|
|
|
fn renderDocComments(
|
|
tree: *ast.Tree,
|
|
stream: var,
|
|
node: var,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
const comment = node.doc_comments orelse return;
|
|
return renderDocCommentsToken(tree, stream, comment, node.firstToken(), indent, start_col);
|
|
}
|
|
|
|
fn renderDocCommentsToken(
|
|
tree: *ast.Tree,
|
|
stream: var,
|
|
comment: *ast.Node.DocComment,
|
|
first_token: ast.TokenIndex,
|
|
indent: usize,
|
|
start_col: *usize,
|
|
) (@TypeOf(stream).Error || Error)!void {
|
|
var tok_i = comment.first_line;
|
|
while (true) : (tok_i += 1) {
|
|
switch (tree.token_ids[tok_i]) {
|
|
.DocComment, .ContainerDocComment => {
|
|
if (comment.first_line < first_token) {
|
|
try renderToken(tree, stream, tok_i, indent, start_col, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
} else {
|
|
try renderToken(tree, stream, tok_i, indent, start_col, Space.NoComment);
|
|
try stream.writeAll("\n");
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
},
|
|
.LineComment => continue,
|
|
else => break,
|
|
}
|
|
}
|
|
}
|
|
|
|
fn nodeIsBlock(base: *const ast.Node) bool {
|
|
return switch (base.id) {
|
|
.Block,
|
|
.If,
|
|
.For,
|
|
.While,
|
|
.Switch,
|
|
=> true,
|
|
else => false,
|
|
};
|
|
}
|
|
|
|
fn nodeCausesSliceOpSpace(base: *ast.Node) bool {
|
|
const infix_op = base.cast(ast.Node.InfixOp) orelse return false;
|
|
return switch (infix_op.op) {
|
|
ast.Node.InfixOp.Op.Period => false,
|
|
else => true,
|
|
};
|
|
}
|
|
|
|
/// A `std.io.OutStream` that returns whether the given character has been written to it.
|
|
/// The contents are not written to anything.
|
|
const FindByteOutStream = struct {
|
|
byte_found: bool,
|
|
byte: u8,
|
|
|
|
pub const Error = error{};
|
|
pub const OutStream = std.io.OutStream(*FindByteOutStream, Error, write);
|
|
|
|
pub fn init(byte: u8) FindByteOutStream {
|
|
return FindByteOutStream{
|
|
.byte = byte,
|
|
.byte_found = false,
|
|
};
|
|
}
|
|
|
|
pub fn write(self: *FindByteOutStream, bytes: []const u8) Error!usize {
|
|
if (self.byte_found) return bytes.len;
|
|
self.byte_found = blk: {
|
|
for (bytes) |b|
|
|
if (b == self.byte) break :blk true;
|
|
break :blk false;
|
|
};
|
|
return bytes.len;
|
|
}
|
|
|
|
pub fn outStream(self: *FindByteOutStream) OutStream {
|
|
return .{ .context = self };
|
|
}
|
|
};
|
|
|
|
fn copyFixingWhitespace(stream: var, slice: []const u8) @TypeOf(stream).Error!void {
|
|
for (slice) |byte| switch (byte) {
|
|
'\t' => try stream.writeAll(" "),
|
|
'\r' => {},
|
|
else => try stream.writeByte(byte),
|
|
};
|
|
}
|