1971 lines
95 KiB
Zig
1971 lines
95 KiB
Zig
const std = @import("../index.zig");
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const builtin = @import("builtin");
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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).Child.Error || Error)!bool {
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comptime assert(@typeId(@typeOf(stream)) == builtin.TypeId.Pointer);
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var anything_changed: bool = false;
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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).Child.Error;
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const Stream = std.io.OutStream(StreamError);
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anything_changed_ptr: &bool,
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child_stream: @typeOf(stream),
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stream: Stream,
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source_index: usize,
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source: []const u8,
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fn write(iface_stream: &Stream, bytes: []const u8) StreamError!void {
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const self = @fieldParentPtr(MyStream, "stream", iface_stream);
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if (!self.anything_changed_ptr.*) {
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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_ptr.* = 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_ptr.* = true;
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}
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}
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}
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try 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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.stream = MyStream.Stream{ .writeFn = MyStream.write },
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.child_stream = stream,
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.anything_changed_ptr = &anything_changed,
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.source_index = 0,
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.source = tree.source,
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};
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try renderRoot(allocator, &my_stream.stream, tree);
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return 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).Child.Error || Error)!void {
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// render all the line comments at the beginning of the file
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var tok_it = tree.tokens.iterator(0);
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while (tok_it.next()) |token| {
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if (token.id != Token.Id.LineComment) break;
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try stream.print("{}\n", mem.trimRight(u8, tree.tokenSlicePtr(token), " "));
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if (tok_it.peek()) |next_token| {
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const loc = tree.tokenLocationPtr(token.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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}
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var start_col: usize = 0;
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var it = tree.root_node.decls.iterator(0);
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while (it.next()) |decl| {
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try renderTopLevelDecl(allocator, stream, tree, 0, &start_col, decl.*);
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if (it.peek()) |next_decl| {
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try renderExtraNewline(tree, stream, &start_col, next_decl.*);
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}
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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) !void {
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const first_token = node.firstToken();
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var prev_token = first_token;
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while (tree.tokens.at(prev_token - 1).id == Token.Id.DocComment) {
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prev_token -= 1;
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}
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const prev_token_end = tree.tokens.at(prev_token - 1).end;
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const loc = tree.tokenLocation(prev_token_end, first_token);
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if (loc.line >= 2) {
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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).Child.Error || Error)!void {
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switch (decl.id) {
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ast.Node.Id.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.Space);
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try renderExpression(allocator, stream, tree, indent, start_col, body_node, Space.Newline);
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} else {
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try renderExpression(allocator, stream, tree, indent, start_col, decl, Space.None);
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try renderToken(tree, stream, tree.nextToken(decl.lastToken()), indent, start_col, Space.Newline);
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}
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},
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ast.Node.Id.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.Space); // pub
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}
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try renderToken(tree, stream, use_decl.use_token, indent, start_col, Space.Space); // use
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try renderExpression(allocator, stream, tree, indent, start_col, use_decl.expr, Space.None);
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try renderToken(tree, stream, use_decl.semicolon_token, indent, start_col, Space.Newline); // ;
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},
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ast.Node.Id.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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ast.Node.Id.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.Space);
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try renderExpression(allocator, stream, tree, indent, start_col, test_decl.name, Space.Space);
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try renderExpression(allocator, stream, tree, indent, start_col, test_decl.body_node, Space.Newline);
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},
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ast.Node.Id.StructField => {
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const field = @fieldParentPtr(ast.Node.StructField, "base", decl);
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try renderDocComments(tree, stream, field, indent, start_col);
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if (field.visib_token) |visib_token| {
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try renderToken(tree, stream, visib_token, indent, start_col, Space.Space); // pub
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}
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try renderToken(tree, stream, field.name_token, indent, start_col, Space.None); // name
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try renderToken(tree, stream, tree.nextToken(field.name_token), indent, start_col, Space.Space); // :
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try renderExpression(allocator, stream, tree, indent, start_col, field.type_expr, Space.Comma); // type,
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},
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ast.Node.Id.UnionTag => {
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const tag = @fieldParentPtr(ast.Node.UnionTag, "base", decl);
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try renderDocComments(tree, stream, tag, indent, start_col);
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if (tag.type_expr == null and tag.value_expr == null) {
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return renderToken(tree, stream, tag.name_token, indent, start_col, Space.Comma); // name,
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}
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if (tag.type_expr == null) {
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try renderToken(tree, stream, tag.name_token, indent, start_col, Space.Space); // name
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} else {
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try renderToken(tree, stream, tag.name_token, indent, start_col, Space.None); // name
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}
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if (tag.type_expr) |type_expr| {
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try renderToken(tree, stream, tree.nextToken(tag.name_token), indent, start_col, Space.Space); // :
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if (tag.value_expr == null) {
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try renderExpression(allocator, stream, tree, indent, start_col, type_expr, Space.Comma); // type,
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return;
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} else {
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try renderExpression(allocator, stream, tree, indent, start_col, type_expr, Space.Space); // type
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}
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}
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const value_expr = ??tag.value_expr;
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try renderToken(tree, stream, tree.prevToken(value_expr.firstToken()), indent, start_col, Space.Space); // =
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try renderExpression(allocator, stream, tree, indent, start_col, value_expr, Space.Comma); // value,
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},
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ast.Node.Id.EnumTag => {
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const tag = @fieldParentPtr(ast.Node.EnumTag, "base", decl);
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try renderDocComments(tree, stream, tag, indent, start_col);
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if (tag.value) |value| {
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try renderToken(tree, stream, tag.name_token, indent, start_col, Space.Space); // name
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try renderToken(tree, stream, tree.nextToken(tag.name_token), indent, start_col, Space.Space); // =
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try renderExpression(allocator, stream, tree, indent, start_col, value, Space.Comma);
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} else {
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try renderToken(tree, stream, tag.name_token, indent, start_col, Space.Comma); // name
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}
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},
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ast.Node.Id.Comptime => {
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assert(!decl.requireSemiColon());
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try renderExpression(allocator, stream, tree, indent, start_col, decl, Space.Newline);
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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).Child.Error || Error)!void {
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switch (base.id) {
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ast.Node.Id.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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ast.Node.Id.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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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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var it = block.statements.iterator(0);
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while (it.next()) |statement| {
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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 (it.peek()) |next_statement| {
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try renderExtraNewline(tree, stream, start_col, next_statement.*);
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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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ast.Node.Id.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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return renderExpression(allocator, stream, tree, indent, start_col, defer_node.expr, space);
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},
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ast.Node.Id.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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ast.Node.Id.AsyncAttribute => {
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const async_attr = @fieldParentPtr(ast.Node.AsyncAttribute, "base", base);
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if (async_attr.allocator_type) |allocator_type| {
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try renderToken(tree, stream, async_attr.async_token, indent, start_col, Space.None); // async
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try renderToken(tree, stream, tree.nextToken(async_attr.async_token), indent, start_col, Space.None); // <
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try renderExpression(allocator, stream, tree, indent, start_col, allocator_type, Space.None); // allocator
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return renderToken(tree, stream, tree.nextToken(allocator_type.lastToken()), indent, start_col, space); // >
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} else {
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return renderToken(tree, stream, async_attr.async_token, indent, start_col, space); // async
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}
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},
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ast.Node.Id.Suspend => {
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const suspend_node = @fieldParentPtr(ast.Node.Suspend, "base", base);
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if (suspend_node.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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if (suspend_node.payload) |payload| {
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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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try renderExpression(allocator, stream, tree, indent, start_col, payload, Space.Space);
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return renderExpression(allocator, stream, tree, indent, start_col, body, space);
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} else {
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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, payload, space);
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}
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} else 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 {
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return renderToken(tree, stream, suspend_node.suspend_token, indent, start_col, space);
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}
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},
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ast.Node.Id.InfixOp => {
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const infix_op_node = @fieldParentPtr(ast.Node.InfixOp, "base", base);
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const op_token = tree.tokens.at(infix_op_node.op_token);
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const op_space = switch (infix_op_node.op) {
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ast.Node.InfixOp.Op.Period, ast.Node.InfixOp.Op.ErrorUnion, ast.Node.InfixOp.Op.Range => Space.None,
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else => Space.Space,
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};
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try renderExpression(allocator, stream, tree, indent, start_col, infix_op_node.lhs, op_space);
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const after_op_space = blk: {
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const loc = tree.tokenLocation(tree.tokens.at(infix_op_node.op_token).end, tree.nextToken(infix_op_node.op_token));
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break :blk if (loc.line == 0) op_space else Space.Newline;
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};
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try renderToken(tree, stream, infix_op_node.op_token, indent, start_col, after_op_space);
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if (after_op_space == Space.Newline) {
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try stream.writeByteNTimes(' ', indent + indent_delta);
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start_col.* = indent + indent_delta;
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}
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switch (infix_op_node.op) {
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ast.Node.InfixOp.Op.Catch => |maybe_payload| if (maybe_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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else => {},
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}
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return renderExpression(allocator, stream, tree, indent, start_col, infix_op_node.rhs, space);
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},
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ast.Node.Id.PrefixOp => {
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const prefix_op_node = @fieldParentPtr(ast.Node.PrefixOp, "base", base);
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switch (prefix_op_node.op) {
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ast.Node.PrefixOp.Op.AddrOf => |addr_of_info| {
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try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.None); // &
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if (addr_of_info.align_info) |align_info| {
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const lparen_token = tree.prevToken(align_info.node.firstToken());
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const align_token = tree.prevToken(lparen_token);
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try renderToken(tree, stream, align_token, indent, start_col, Space.None); // align
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try renderToken(tree, stream, lparen_token, indent, start_col, Space.None); // (
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try renderExpression(allocator, stream, tree, indent, start_col, align_info.node, Space.None);
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if (align_info.bit_range) |bit_range| {
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const colon1 = tree.prevToken(bit_range.start.firstToken());
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const colon2 = tree.prevToken(bit_range.end.firstToken());
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try renderToken(tree, stream, colon1, indent, start_col, Space.None); // :
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try renderExpression(allocator, stream, tree, indent, start_col, bit_range.start, Space.None);
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try renderToken(tree, stream, colon2, indent, start_col, Space.None); // :
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try renderExpression(allocator, stream, tree, indent, start_col, bit_range.end, Space.None);
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const rparen_token = tree.nextToken(bit_range.end.lastToken());
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try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
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} else {
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const rparen_token = tree.nextToken(align_info.node.lastToken());
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try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
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}
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}
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if (addr_of_info.const_token) |const_token| {
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try renderToken(tree, stream, const_token, indent, start_col, Space.Space); // const
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}
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if (addr_of_info.volatile_token) |volatile_token| {
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try renderToken(tree, stream, volatile_token, indent, start_col, Space.Space); // volatile
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}
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},
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ast.Node.PrefixOp.Op.SliceType => |addr_of_info| {
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try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.None); // [
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try renderToken(tree, stream, tree.nextToken(prefix_op_node.op_token), indent, start_col, Space.None); // ]
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if (addr_of_info.align_info) |align_info| {
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const lparen_token = tree.prevToken(align_info.node.firstToken());
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const align_token = tree.prevToken(lparen_token);
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try renderToken(tree, stream, align_token, indent, start_col, Space.None); // align
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try renderToken(tree, stream, lparen_token, indent, start_col, Space.None); // (
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try renderExpression(allocator, stream, tree, indent, start_col, align_info.node, Space.None);
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if (align_info.bit_range) |bit_range| {
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const colon1 = tree.prevToken(bit_range.start.firstToken());
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const colon2 = tree.prevToken(bit_range.end.firstToken());
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try renderToken(tree, stream, colon1, indent, start_col, Space.None); // :
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try renderExpression(allocator, stream, tree, indent, start_col, bit_range.start, Space.None);
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try renderToken(tree, stream, colon2, indent, start_col, Space.None); // :
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try renderExpression(allocator, stream, tree, indent, start_col, bit_range.end, Space.None);
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const rparen_token = tree.nextToken(bit_range.end.lastToken());
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try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
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} else {
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const rparen_token = tree.nextToken(align_info.node.lastToken());
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try renderToken(tree, stream, rparen_token, indent, start_col, Space.Space); // )
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}
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}
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if (addr_of_info.const_token) |const_token| {
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try renderToken(tree, stream, const_token, indent, start_col, Space.Space);
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}
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if (addr_of_info.volatile_token) |volatile_token| {
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try renderToken(tree, stream, volatile_token, indent, start_col, Space.Space);
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}
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},
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ast.Node.PrefixOp.Op.ArrayType => |array_index| {
|
|
try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.None); // [
|
|
try renderExpression(allocator, stream, tree, indent, start_col, array_index, Space.None);
|
|
try renderToken(tree, stream, tree.nextToken(array_index.lastToken()), indent, start_col, Space.None); // ]
|
|
},
|
|
ast.Node.PrefixOp.Op.BitNot,
|
|
ast.Node.PrefixOp.Op.BoolNot,
|
|
ast.Node.PrefixOp.Op.Negation,
|
|
ast.Node.PrefixOp.Op.NegationWrap,
|
|
ast.Node.PrefixOp.Op.UnwrapMaybe,
|
|
ast.Node.PrefixOp.Op.MaybeType,
|
|
ast.Node.PrefixOp.Op.PointerType,
|
|
=> {
|
|
try renderToken(tree, stream, prefix_op_node.op_token, indent, start_col, Space.None);
|
|
},
|
|
|
|
ast.Node.PrefixOp.Op.Try,
|
|
ast.Node.PrefixOp.Op.Await,
|
|
ast.Node.PrefixOp.Op.Cancel,
|
|
ast.Node.PrefixOp.Op.Resume,
|
|
=> {
|
|
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);
|
|
},
|
|
|
|
ast.Node.Id.SuffixOp => {
|
|
const suffix_op = @fieldParentPtr(ast.Node.SuffixOp, "base", base);
|
|
|
|
switch (suffix_op.op) {
|
|
@TagType(ast.Node.SuffixOp.Op).Call => |*call_info| {
|
|
if (call_info.async_attr) |async_attr| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, &async_attr.base, Space.Space);
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
|
|
const lparen = tree.nextToken(suffix_op.lhs.lastToken());
|
|
|
|
if (call_info.params.len == 0) {
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
|
|
const src_has_trailing_comma = blk: {
|
|
const maybe_comma = tree.prevToken(suffix_op.rtoken);
|
|
break :blk tree.tokens.at(maybe_comma).id == Token.Id.Comma;
|
|
};
|
|
|
|
if (src_has_trailing_comma) {
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, lparen, new_indent, start_col, Space.Newline);
|
|
|
|
var it = call_info.params.iterator(0);
|
|
while (true) {
|
|
const param_node = ??it.next();
|
|
|
|
const param_node_new_indent = if (param_node.*.id == ast.Node.Id.MultilineStringLiteral) blk: {
|
|
break :blk indent;
|
|
} else blk: {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
break :blk new_indent;
|
|
};
|
|
|
|
if (it.peek()) |next_node| {
|
|
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, next_node.*);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, param_node_new_indent, start_col, param_node.*, Space.Comma);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
}
|
|
}
|
|
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
var it = call_info.params.iterator(0);
|
|
while (it.next()) |param_node| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, param_node.*, Space.None);
|
|
|
|
if (it.peek() != null) {
|
|
const comma = tree.nextToken(param_node.*.lastToken());
|
|
try renderToken(tree, stream, comma, indent, start_col, Space.Space);
|
|
}
|
|
}
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
},
|
|
|
|
ast.Node.SuffixOp.Op.ArrayAccess => |index_expr| {
|
|
const lbracket = tree.prevToken(index_expr.firstToken());
|
|
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); // [
|
|
try renderExpression(allocator, stream, tree, indent, start_col, index_expr, Space.None);
|
|
return renderToken(tree, stream, rbracket, indent, start_col, space); // ]
|
|
},
|
|
|
|
ast.Node.SuffixOp.Op.Deref => {
|
|
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); // *
|
|
},
|
|
|
|
@TagType(ast.Node.SuffixOp.Op).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| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, end, Space.None);
|
|
}
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space); // ]
|
|
},
|
|
|
|
ast.Node.SuffixOp.Op.StructInitializer => |*field_inits| {
|
|
const lbrace = tree.nextToken(suffix_op.lhs.lastToken());
|
|
|
|
if (field_inits.len == 0) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
|
|
if (field_inits.len == 1) blk: {
|
|
const field_init = ??field_inits.at(0).*.cast(ast.Node.FieldInitializer);
|
|
|
|
if (field_init.expr.cast(ast.Node.SuffixOp)) |nested_suffix_op| {
|
|
if (nested_suffix_op.op == ast.Node.SuffixOp.Op.StructInitializer) {
|
|
break :blk;
|
|
}
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, 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, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
|
|
const src_has_trailing_comma = blk: {
|
|
const maybe_comma = tree.prevToken(suffix_op.rtoken);
|
|
break :blk tree.tokens.at(maybe_comma).id == Token.Id.Comma;
|
|
};
|
|
|
|
const src_same_line = blk: {
|
|
const loc = tree.tokenLocation(tree.tokens.at(lbrace).end, suffix_op.rtoken);
|
|
break :blk loc.line == 0;
|
|
};
|
|
|
|
if (!src_has_trailing_comma and src_same_line) {
|
|
// render all on one line, no trailing comma
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Space);
|
|
|
|
var it = field_inits.iterator(0);
|
|
while (it.next()) |field_init| {
|
|
if (it.peek() != null) {
|
|
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, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Newline);
|
|
|
|
const new_indent = indent + indent_delta;
|
|
|
|
var it = field_inits.iterator(0);
|
|
while (it.next()) |field_init| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
if (it.peek()) |next_field_init| {
|
|
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, next_field_init.*);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, field_init.*, Space.Comma);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
},
|
|
|
|
ast.Node.SuffixOp.Op.ArrayInitializer => |*exprs| {
|
|
const lbrace = tree.nextToken(suffix_op.lhs.lastToken());
|
|
|
|
if (exprs.len == 0) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.None);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
if (exprs.len == 1) {
|
|
const expr = exprs.at(0).*;
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, 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, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
|
|
try renderExpression(allocator, stream, tree, indent, start_col, suffix_op.lhs, Space.None);
|
|
|
|
// scan to find row size
|
|
const maybe_row_size: ?usize = blk: {
|
|
var count: usize = 1;
|
|
var it = exprs.iterator(0);
|
|
while (true) {
|
|
const expr = (??it.next()).*;
|
|
if (it.peek()) |next_expr| {
|
|
const expr_last_token = expr.*.lastToken() + 1;
|
|
const loc = tree.tokenLocation(tree.tokens.at(expr_last_token).end, next_expr.*.firstToken());
|
|
if (loc.line != 0) break :blk count;
|
|
count += 1;
|
|
} else {
|
|
const expr_last_token = expr.*.lastToken();
|
|
const loc = tree.tokenLocation(tree.tokens.at(expr_last_token).end, suffix_op.rtoken);
|
|
if (loc.line == 0) {
|
|
// all on one line
|
|
const src_has_trailing_comma = trailblk: {
|
|
const maybe_comma = tree.prevToken(suffix_op.rtoken);
|
|
break :trailblk tree.tokens.at(maybe_comma).id == Token.Id.Comma;
|
|
};
|
|
if (src_has_trailing_comma) {
|
|
break :blk 1; // force row size 1
|
|
} else {
|
|
break :blk null; // no newlines
|
|
}
|
|
}
|
|
break :blk count;
|
|
}
|
|
}
|
|
};
|
|
|
|
if (maybe_row_size) |row_size| {
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, lbrace, new_indent, start_col, Space.Newline);
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
var it = exprs.iterator(0);
|
|
var i: usize = 1;
|
|
while (it.next()) |expr| {
|
|
if (it.peek()) |next_expr| {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, expr.*, Space.None);
|
|
|
|
const comma = tree.nextToken(expr.*.lastToken());
|
|
|
|
if (i != row_size) {
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.Space); // ,
|
|
i += 1;
|
|
continue;
|
|
}
|
|
i = 1;
|
|
|
|
try renderToken(tree, stream, comma, new_indent, start_col, Space.Newline); // ,
|
|
|
|
try renderExtraNewline(tree, stream, start_col, next_expr.*);
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, expr.*, Space.Comma); // ,
|
|
}
|
|
}
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, suffix_op.rtoken, indent, start_col, space);
|
|
} else {
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Space);
|
|
var it = exprs.iterator(0);
|
|
while (it.next()) |expr| {
|
|
if (it.peek()) |next_expr| {
|
|
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, suffix_op.rtoken, indent, start_col, space);
|
|
}
|
|
},
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.ControlFlowExpression => {
|
|
const flow_expr = @fieldParentPtr(ast.Node.ControlFlowExpression, "base", base);
|
|
|
|
switch (flow_expr.kind) {
|
|
ast.Node.ControlFlowExpression.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
|
|
}
|
|
},
|
|
ast.Node.ControlFlowExpression.Kind.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);
|
|
}
|
|
},
|
|
ast.Node.ControlFlowExpression.Kind.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);
|
|
},
|
|
|
|
ast.Node.Id.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);
|
|
},
|
|
|
|
ast.Node.Id.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);
|
|
},
|
|
|
|
ast.Node.Id.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);
|
|
},
|
|
|
|
ast.Node.Id.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);
|
|
},
|
|
|
|
ast.Node.Id.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);
|
|
},
|
|
|
|
ast.Node.Id.IntegerLiteral => {
|
|
const integer_literal = @fieldParentPtr(ast.Node.IntegerLiteral, "base", base);
|
|
return renderToken(tree, stream, integer_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.FloatLiteral => {
|
|
const float_literal = @fieldParentPtr(ast.Node.FloatLiteral, "base", base);
|
|
return renderToken(tree, stream, float_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.StringLiteral => {
|
|
const string_literal = @fieldParentPtr(ast.Node.StringLiteral, "base", base);
|
|
return renderToken(tree, stream, string_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.CharLiteral => {
|
|
const char_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
|
|
return renderToken(tree, stream, char_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.BoolLiteral => {
|
|
const bool_literal = @fieldParentPtr(ast.Node.CharLiteral, "base", base);
|
|
return renderToken(tree, stream, bool_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.NullLiteral => {
|
|
const null_literal = @fieldParentPtr(ast.Node.NullLiteral, "base", base);
|
|
return renderToken(tree, stream, null_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.ThisLiteral => {
|
|
const this_literal = @fieldParentPtr(ast.Node.ThisLiteral, "base", base);
|
|
return renderToken(tree, stream, this_literal.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.Unreachable => {
|
|
const unreachable_node = @fieldParentPtr(ast.Node.Unreachable, "base", base);
|
|
return renderToken(tree, stream, unreachable_node.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.ErrorType => {
|
|
const error_type = @fieldParentPtr(ast.Node.ErrorType, "base", base);
|
|
return renderToken(tree, stream, error_type.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.VarType => {
|
|
const var_type = @fieldParentPtr(ast.Node.VarType, "base", base);
|
|
return renderToken(tree, stream, var_type.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.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) {
|
|
ast.Node.ContainerDecl.InitArg.None => {
|
|
try renderToken(tree, stream, container_decl.kind_token, indent, start_col, Space.Space); // union
|
|
},
|
|
ast.Node.ContainerDecl.InitArg.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); // )
|
|
}
|
|
},
|
|
ast.Node.ContainerDecl.InitArg.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); // }
|
|
} else {
|
|
const new_indent = indent + indent_delta;
|
|
try renderToken(tree, stream, container_decl.lbrace_token, new_indent, start_col, Space.Newline); // {
|
|
|
|
var it = container_decl.fields_and_decls.iterator(0);
|
|
while (it.next()) |decl| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderTopLevelDecl(allocator, stream, tree, new_indent, start_col, decl.*);
|
|
|
|
if (it.peek()) |next_decl| {
|
|
try renderExtraNewline(tree, stream, start_col, next_decl.*);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, container_decl.rbrace_token, indent, start_col, space); // }
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.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.at(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
|
|
try renderToken(tree, stream, lbrace, indent, start_col, Space.Newline); // {
|
|
const new_indent = indent + indent_delta;
|
|
|
|
var it = err_set_decl.decls.iterator(0);
|
|
while (it.next()) |node| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
|
|
if (it.peek()) |next_node| {
|
|
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, next_node.*);
|
|
} 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); // }
|
|
},
|
|
|
|
ast.Node.Id.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
|
|
},
|
|
|
|
ast.Node.Id.MultilineStringLiteral => {
|
|
const multiline_str_literal = @fieldParentPtr(ast.Node.MultilineStringLiteral, "base", base);
|
|
|
|
var skip_first_indent = true;
|
|
if (tree.tokens.at(multiline_str_literal.firstToken() - 1).id != Token.Id.LineComment) {
|
|
try stream.print("\n");
|
|
skip_first_indent = false;
|
|
}
|
|
|
|
var i: usize = 0;
|
|
while (i < multiline_str_literal.lines.len) : (i += 1) {
|
|
const t = multiline_str_literal.lines.at(i).*;
|
|
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);
|
|
},
|
|
ast.Node.Id.UndefinedLiteral => {
|
|
const undefined_literal = @fieldParentPtr(ast.Node.UndefinedLiteral, "base", base);
|
|
return renderToken(tree, stream, undefined_literal.token, indent, start_col, space);
|
|
},
|
|
|
|
ast.Node.Id.BuiltinCall => {
|
|
const builtin_call = @fieldParentPtr(ast.Node.BuiltinCall, "base", base);
|
|
|
|
try renderToken(tree, stream, builtin_call.builtin_token, indent, start_col, Space.None); // @name
|
|
try renderToken(tree, stream, tree.nextToken(builtin_call.builtin_token), indent, start_col, Space.None); // (
|
|
|
|
var it = builtin_call.params.iterator(0);
|
|
while (it.next()) |param_node| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, param_node.*, Space.None);
|
|
|
|
if (it.peek() != null) {
|
|
const comma_token = tree.nextToken(param_node.*.lastToken());
|
|
try renderToken(tree, stream, comma_token, indent, start_col, Space.Space); // ,
|
|
}
|
|
}
|
|
return renderToken(tree, stream, builtin_call.rparen_token, indent, start_col, space); // )
|
|
},
|
|
|
|
ast.Node.Id.FnProto => {
|
|
const fn_proto = @fieldParentPtr(ast.Node.FnProto, "base", base);
|
|
|
|
if (fn_proto.visib_token) |visib_token_index| {
|
|
const visib_token = tree.tokens.at(visib_token_index);
|
|
assert(visib_token.id == Token.Id.Keyword_pub or visib_token.id == Token.Id.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| {
|
|
try renderToken(tree, stream, extern_export_inline_token, indent, start_col, Space.Space); // extern/export
|
|
}
|
|
|
|
if (fn_proto.lib_name) |lib_name| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, lib_name, Space.Space);
|
|
}
|
|
|
|
if (fn_proto.cc_token) |cc_token| {
|
|
try renderToken(tree, stream, cc_token, indent, start_col, Space.Space); // stdcallcc
|
|
}
|
|
|
|
if (fn_proto.async_attr) |async_attr| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, &async_attr.base, 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);
|
|
};
|
|
|
|
const rparen = tree.prevToken(switch (fn_proto.return_type) {
|
|
ast.Node.FnProto.ReturnType.Explicit => |node| node.firstToken(),
|
|
ast.Node.FnProto.ReturnType.InferErrorSet => |node| tree.prevToken(node.firstToken()),
|
|
});
|
|
|
|
const src_params_trailing_comma = blk: {
|
|
const maybe_comma = tree.prevToken(rparen);
|
|
break :blk tree.tokens.at(maybe_comma).id == Token.Id.Comma;
|
|
};
|
|
const src_params_same_line = blk: {
|
|
const loc = tree.tokenLocation(tree.tokens.at(lparen).end, rparen);
|
|
break :blk loc.line == 0;
|
|
};
|
|
|
|
if (!src_params_trailing_comma and src_params_same_line) {
|
|
try renderToken(tree, stream, lparen, indent, start_col, Space.None); // (
|
|
|
|
// render all on one line, no trailing comma
|
|
var it = fn_proto.params.iterator(0);
|
|
while (it.next()) |param_decl_node| {
|
|
try renderParamDecl(allocator, stream, tree, indent, start_col, param_decl_node.*, Space.None);
|
|
|
|
if (it.peek() != null) {
|
|
const comma = tree.nextToken(param_decl_node.*.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); // (
|
|
|
|
var it = fn_proto.params.iterator(0);
|
|
while (it.next()) |param_decl_node| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderParamDecl(allocator, stream, tree, indent, start_col, param_decl_node.*, 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); // )
|
|
}
|
|
|
|
switch (fn_proto.return_type) {
|
|
ast.Node.FnProto.ReturnType.Explicit => |node| {
|
|
return renderExpression(allocator, stream, tree, indent, start_col, node, space);
|
|
},
|
|
ast.Node.FnProto.ReturnType.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);
|
|
},
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.PromiseType => {
|
|
const promise_type = @fieldParentPtr(ast.Node.PromiseType, "base", base);
|
|
|
|
if (promise_type.result) |result| {
|
|
try renderToken(tree, stream, promise_type.promise_token, indent, start_col, Space.None); // promise
|
|
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, promise_type.promise_token, indent, start_col, space); // promise
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.DocComment => unreachable, // doc comments are attached to nodes
|
|
|
|
ast.Node.Id.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); // {
|
|
|
|
var it = switch_node.cases.iterator(0);
|
|
while (it.next()) |node| {
|
|
try stream.writeByteNTimes(' ', new_indent);
|
|
try renderExpression(allocator, stream, tree, new_indent, start_col, node.*, Space.Comma);
|
|
|
|
if (it.peek()) |next_node| {
|
|
try renderExtraNewline(tree, stream, start_col, next_node.*);
|
|
}
|
|
}
|
|
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, switch_node.rbrace, indent, start_col, space); // }
|
|
},
|
|
|
|
ast.Node.Id.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.at(switch_case.items.len - 1).*;
|
|
const maybe_comma = tree.nextToken(last_node.lastToken());
|
|
break :blk tree.tokens.at(maybe_comma).id == Token.Id.Comma;
|
|
};
|
|
|
|
if (switch_case.items.len == 1 or !src_has_trailing_comma) {
|
|
var it = switch_case.items.iterator(0);
|
|
while (it.next()) |node| {
|
|
if (it.peek()) |next_node| {
|
|
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, next_node.*);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node.*, Space.Space);
|
|
}
|
|
}
|
|
} else {
|
|
var it = switch_case.items.iterator(0);
|
|
while (true) {
|
|
const node = ??it.next();
|
|
if (it.peek()) |next_node| {
|
|
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, next_node.*);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, node.*, Space.Comma);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
},
|
|
ast.Node.Id.SwitchElse => {
|
|
const switch_else = @fieldParentPtr(ast.Node.SwitchElse, "base", base);
|
|
return renderToken(tree, stream, switch_else.token, indent, start_col, space);
|
|
},
|
|
ast.Node.Id.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);
|
|
},
|
|
|
|
ast.Node.Id.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);
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.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 rparen_space = if (for_node.payload != null or
|
|
for_node.body.id == ast.Node.Id.Block) Space.Space else Space.Newline;
|
|
try renderToken(tree, stream, rparen, indent, start_col, rparen_space); // )
|
|
|
|
if (for_node.payload) |payload| {
|
|
const payload_space = if (for_node.body.id == ast.Node.Id.Block) Space.Space else Space.Newline;
|
|
try renderExpression(allocator, stream, tree, indent, start_col, payload, payload_space);
|
|
}
|
|
|
|
const body_space = blk: {
|
|
if (for_node.@"else" != null) {
|
|
if (for_node.body.id == ast.Node.Id.Block) {
|
|
break :blk Space.Space;
|
|
} else {
|
|
break :blk Space.Newline;
|
|
}
|
|
} else {
|
|
break :blk space;
|
|
}
|
|
};
|
|
if (for_node.body.id == ast.Node.Id.Block) {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, for_node.body, body_space);
|
|
} else {
|
|
try stream.writeByteNTimes(' ', indent + indent_delta);
|
|
try renderExpression(allocator, stream, tree, indent, start_col, for_node.body, body_space);
|
|
}
|
|
|
|
if (for_node.@"else") |@"else"| {
|
|
if (for_node.body.id != ast.Node.Id.Block) {
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
|
|
return renderExpression(allocator, stream, tree, indent, start_col, &@"else".base, space);
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.If => {
|
|
const if_node = @fieldParentPtr(ast.Node.If, "base", base);
|
|
|
|
const lparen = tree.prevToken(if_node.condition.firstToken());
|
|
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_block = nodeIsBlock(if_node.body);
|
|
|
|
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);
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.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;
|
|
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); // :
|
|
|
|
var it = asm_node.outputs.iterator(0);
|
|
while (true) {
|
|
const asm_output = ??it.next();
|
|
const node = &(asm_output.*).base;
|
|
|
|
if (it.peek()) |next_asm_output| {
|
|
try renderExpression(allocator, stream, tree, indent_extra, start_col, node, Space.None);
|
|
const next_node = &(next_asm_output.*).base;
|
|
|
|
const comma = tree.prevToken(next_asm_output.*.firstToken());
|
|
try renderToken(tree, stream, comma, indent_extra, start_col, Space.Newline); // ,
|
|
try renderExtraNewline(tree, stream, start_col, next_node);
|
|
|
|
try stream.writeByteNTimes(' ', indent_extra);
|
|
} else if (asm_node.inputs.len == 0 and asm_node.clobbers.len == 0) {
|
|
try renderExpression(allocator, stream, tree, indent_extra, start_col, 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, node, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
const comma_or_colon = tree.nextToken(node.lastToken());
|
|
break :blk switch (tree.tokens.at(comma_or_colon).id) {
|
|
Token.Id.Comma => tree.nextToken(comma_or_colon),
|
|
else => comma_or_colon,
|
|
};
|
|
}
|
|
}
|
|
};
|
|
|
|
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); // :
|
|
|
|
var it = asm_node.inputs.iterator(0);
|
|
while (true) {
|
|
const asm_input = ??it.next();
|
|
const node = &(asm_input.*).base;
|
|
|
|
if (it.peek()) |next_asm_input| {
|
|
try renderExpression(allocator, stream, tree, indent_extra, start_col, node, Space.None);
|
|
const next_node = &(next_asm_input.*).base;
|
|
|
|
const comma = tree.prevToken(next_asm_input.*.firstToken());
|
|
try renderToken(tree, stream, comma, indent_extra, start_col, Space.Newline); // ,
|
|
try renderExtraNewline(tree, stream, start_col, next_node);
|
|
|
|
try stream.writeByteNTimes(' ', indent_extra);
|
|
} else if (asm_node.clobbers.len == 0) {
|
|
try renderExpression(allocator, stream, tree, indent_extra, start_col, 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, node, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent_once);
|
|
const comma_or_colon = tree.nextToken(node.lastToken());
|
|
break :blk switch (tree.tokens.at(comma_or_colon).id) {
|
|
Token.Id.Comma => tree.nextToken(comma_or_colon),
|
|
else => comma_or_colon,
|
|
};
|
|
}
|
|
}
|
|
};
|
|
|
|
try renderToken(tree, stream, colon3, indent, start_col, Space.Space); // :
|
|
|
|
var it = asm_node.clobbers.iterator(0);
|
|
while (true) {
|
|
const clobber_token = ??it.next();
|
|
|
|
if (it.peek() == null) {
|
|
try renderToken(tree, stream, clobber_token.*, indent_once, start_col, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
return renderToken(tree, stream, asm_node.rparen, indent, start_col, space);
|
|
} else {
|
|
try renderToken(tree, stream, clobber_token.*, indent_once, start_col, Space.None);
|
|
const comma = tree.nextToken(clobber_token.*);
|
|
try renderToken(tree, stream, comma, indent_once, start_col, Space.Space); // ,
|
|
}
|
|
}
|
|
},
|
|
|
|
ast.Node.Id.AsmInput => {
|
|
const asm_input = @fieldParentPtr(ast.Node.AsmInput, "base", base);
|
|
|
|
try stream.write("[");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_input.symbolic_name, Space.None);
|
|
try stream.write("] ");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_input.constraint, Space.None);
|
|
try stream.write(" (");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_input.expr, Space.None);
|
|
return renderToken(tree, stream, asm_input.lastToken(), indent, start_col, space); // )
|
|
},
|
|
|
|
ast.Node.Id.AsmOutput => {
|
|
const asm_output = @fieldParentPtr(ast.Node.AsmOutput, "base", base);
|
|
|
|
try stream.write("[");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_output.symbolic_name, Space.None);
|
|
try stream.write("] ");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, asm_output.constraint, Space.None);
|
|
try stream.write(" (");
|
|
|
|
switch (asm_output.kind) {
|
|
ast.Node.AsmOutput.Kind.Variable => |variable_name| {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, &variable_name.base, Space.None);
|
|
},
|
|
ast.Node.AsmOutput.Kind.Return => |return_type| {
|
|
try stream.write("-> ");
|
|
try renderExpression(allocator, stream, tree, indent, start_col, return_type, Space.None);
|
|
},
|
|
}
|
|
|
|
return renderToken(tree, stream, asm_output.lastToken(), indent, start_col, space); // )
|
|
},
|
|
|
|
ast.Node.Id.StructField,
|
|
ast.Node.Id.UnionTag,
|
|
ast.Node.Id.EnumTag,
|
|
ast.Node.Id.Root,
|
|
ast.Node.Id.VarDecl,
|
|
ast.Node.Id.Use,
|
|
ast.Node.Id.TestDecl,
|
|
ast.Node.Id.ParamDecl,
|
|
=> unreachable,
|
|
}
|
|
}
|
|
|
|
fn renderVarDecl(
|
|
allocator: &mem.Allocator,
|
|
stream: var,
|
|
tree: &ast.Tree,
|
|
indent: usize,
|
|
start_col: &usize,
|
|
var_decl: &ast.Node.VarDecl,
|
|
) (@typeOf(stream).Child.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
|
|
}
|
|
|
|
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.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.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.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 == ast.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,
|
|
base: &ast.Node,
|
|
space: Space,
|
|
) (@typeOf(stream).Child.Error || Error)!void {
|
|
const param_decl = @fieldParentPtr(ast.Node.ParamDecl, "base", base);
|
|
|
|
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); // :
|
|
}
|
|
if (param_decl.var_args_token) |var_args_token| {
|
|
try renderToken(tree, stream, var_args_token, indent, start_col, space);
|
|
} else {
|
|
try renderExpression(allocator, stream, tree, indent, start_col, param_decl.type_node, space);
|
|
}
|
|
}
|
|
|
|
fn renderStatement(
|
|
allocator: &mem.Allocator,
|
|
stream: var,
|
|
tree: &ast.Tree,
|
|
indent: usize,
|
|
start_col: &usize,
|
|
base: &ast.Node,
|
|
) (@typeOf(stream).Child.Error || Error)!void {
|
|
switch (base.id) {
|
|
ast.Node.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.tokens.at(semicolon_index).id == Token.Id.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 renderToken(tree: &ast.Tree, stream: var, token_index: ast.TokenIndex, indent: usize, start_col: &usize, space: Space) (@typeOf(stream).Child.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 = tree.tokens.at(token_index);
|
|
try stream.write(mem.trimRight(u8, tree.tokenSlicePtr(token), " "));
|
|
|
|
if (space == Space.NoComment)
|
|
return;
|
|
|
|
var next_token = tree.tokens.at(token_index + 1);
|
|
|
|
if (space == Space.Comma) switch (next_token.id) {
|
|
Token.Id.Comma => return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline),
|
|
Token.Id.LineComment => {
|
|
try stream.write(", ");
|
|
return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline);
|
|
},
|
|
else => {
|
|
if (tree.tokens.at(token_index + 2).id == Token.Id.MultilineStringLiteralLine) {
|
|
try stream.write(",");
|
|
return;
|
|
} else {
|
|
try stream.write(",\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
};
|
|
|
|
// Skip over same line doc comments
|
|
var offset: usize = 1;
|
|
if (next_token.id == Token.Id.DocComment) {
|
|
const loc = tree.tokenLocationPtr(token.end, next_token);
|
|
if (loc.line == 0) {
|
|
offset += 1;
|
|
next_token = tree.tokens.at(token_index + offset);
|
|
}
|
|
}
|
|
|
|
if (next_token.id != Token.Id.LineComment) blk: {
|
|
switch (space) {
|
|
Space.None, Space.NoNewline => return,
|
|
Space.Newline => {
|
|
if (next_token.id == Token.Id.MultilineStringLiteralLine) {
|
|
return;
|
|
} else {
|
|
try stream.write("\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
Space.Space, Space.SpaceOrOutdent => {
|
|
if (next_token.id == Token.Id.MultilineStringLiteralLine)
|
|
return;
|
|
try stream.writeByte(' ');
|
|
return;
|
|
},
|
|
Space.NoComment, Space.Comma, Space.BlockStart => unreachable,
|
|
}
|
|
}
|
|
|
|
const comment_is_empty = mem.trimRight(u8, tree.tokenSlicePtr(next_token), " ").len == 2;
|
|
if (comment_is_empty) {
|
|
switch (space) {
|
|
Space.Newline => {
|
|
try stream.writeByte('\n');
|
|
start_col.* = 0;
|
|
return;
|
|
},
|
|
else => {},
|
|
}
|
|
}
|
|
|
|
var loc = tree.tokenLocationPtr(token.end, next_token);
|
|
if (loc.line == 0) {
|
|
try stream.print(" {}", mem.trimRight(u8, tree.tokenSlicePtr(next_token), " "));
|
|
offset = 2;
|
|
token = next_token;
|
|
next_token = tree.tokens.at(token_index + offset);
|
|
if (next_token.id != Token.Id.LineComment) {
|
|
switch (space) {
|
|
Space.None, Space.Space => {
|
|
try stream.writeByte('\n');
|
|
const after_comment_token = tree.tokens.at(token_index + offset);
|
|
const next_line_indent = switch (after_comment_token.id) {
|
|
Token.Id.RParen, Token.Id.RBrace, Token.Id.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 == Token.Id.MultilineStringLiteralLine) {
|
|
return;
|
|
} else {
|
|
try stream.write("\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
Space.NoNewline => {},
|
|
Space.NoComment, Space.Comma, Space.BlockStart => unreachable,
|
|
}
|
|
return;
|
|
}
|
|
loc = tree.tokenLocationPtr(token.end, next_token);
|
|
}
|
|
|
|
while (true) {
|
|
assert(loc.line != 0);
|
|
const newline_count = if (loc.line == 1) u8(1) else u8(2);
|
|
try stream.writeByteNTimes('\n', newline_count);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
try stream.write(mem.trimRight(u8, tree.tokenSlicePtr(next_token), " "));
|
|
|
|
offset += 1;
|
|
token = next_token;
|
|
next_token = tree.tokens.at(token_index + offset);
|
|
if (next_token.id != Token.Id.LineComment) {
|
|
switch (space) {
|
|
Space.Newline => {
|
|
if (next_token.id == Token.Id.MultilineStringLiteralLine) {
|
|
return;
|
|
} else {
|
|
try stream.write("\n");
|
|
start_col.* = 0;
|
|
return;
|
|
}
|
|
},
|
|
Space.None, Space.Space => {
|
|
try stream.writeByte('\n');
|
|
|
|
const after_comment_token = tree.tokens.at(token_index + offset);
|
|
const next_line_indent = switch (after_comment_token.id) {
|
|
Token.Id.RParen, Token.Id.RBrace, Token.Id.RBracket => indent - indent_delta,
|
|
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.tokenLocationPtr(token.end, next_token);
|
|
}
|
|
}
|
|
|
|
fn renderDocComments(
|
|
tree: &ast.Tree,
|
|
stream: var,
|
|
node: var,
|
|
indent: usize,
|
|
start_col: &usize,
|
|
) (@typeOf(stream).Child.Error || Error)!void {
|
|
const comment = node.doc_comments ?? return;
|
|
var it = comment.lines.iterator(0);
|
|
const first_token = node.firstToken();
|
|
while (it.next()) |line_token_index| {
|
|
if (line_token_index.* < first_token) {
|
|
try renderToken(tree, stream, line_token_index.*, indent, start_col, Space.Newline);
|
|
try stream.writeByteNTimes(' ', indent);
|
|
} else {
|
|
try renderToken(tree, stream, line_token_index.*, indent, start_col, Space.NoComment);
|
|
try stream.write("\n");
|
|
try stream.writeByteNTimes(' ', indent);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn nodeIsBlock(base: &const ast.Node) bool {
|
|
return switch (base.id) {
|
|
ast.Node.Id.Block,
|
|
ast.Node.Id.If,
|
|
ast.Node.Id.For,
|
|
ast.Node.Id.While,
|
|
ast.Node.Id.Switch,
|
|
=> true,
|
|
else => false,
|
|
};
|
|
}
|
|
|
|
fn nodeCausesSliceOpSpace(base: &ast.Node) bool {
|
|
const infix_op = base.cast(ast.Node.InfixOp) ?? return false;
|
|
return switch (infix_op.op) {
|
|
ast.Node.InfixOp.Op.Period => false,
|
|
else => true,
|
|
};
|
|
}
|