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@Type for union fixes

master
Tadeo Kondrak 2020-08-27 13:34:02 -06:00
parent 771f35c593
commit acdf1f0bde
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GPG Key ID: D41E092CA43F1D8B
3 changed files with 115 additions and 52 deletions
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103
src/analyze.cpp
View File

@ -2603,16 +2603,16 @@ static Error resolve_enum_zero_bits(CodeGen *g, ZigType *enum_type) {
if (decl_node->type == NodeTypeContainerDecl) {
assert(!enum_type->data.enumeration.fields);
field_count = (uint32_t)decl_node->data.container_decl.fields.length;
if (field_count == 0) {
add_node_error(g, decl_node, buf_sprintf("enums must have 1 or more fields"));
enum_type->data.enumeration.src_field_count = field_count;
enum_type->data.enumeration.fields = nullptr;
enum_type->data.enumeration.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
} else {
field_count = enum_type->data.enumeration.src_field_count;
field_count = enum_type->data.enumeration.src_field_count + enum_type->data.enumeration.non_exhaustive;
}
if (field_count == 0) {
add_node_error(g, decl_node, buf_sprintf("enums must have 1 or more fields"));
enum_type->data.enumeration.src_field_count = field_count;
enum_type->data.enumeration.fields = nullptr;
enum_type->data.enumeration.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
Scope *scope = &enum_type->data.enumeration.decls_scope->base;
@ -3072,18 +3072,19 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
if (decl_node->type == NodeTypeContainerDecl) {
assert(union_type->data.unionation.fields == nullptr);
field_count = (uint32_t)decl_node->data.container_decl.fields.length;
if (field_count == 0) {
add_node_error(g, decl_node, buf_sprintf("unions must have 1 or more fields"));
union_type->data.unionation.src_field_count = field_count;
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
union_type->data.unionation.src_field_count = field_count;
union_type->data.unionation.fields = heap::c_allocator.allocate<TypeUnionField>(field_count);
union_type->data.unionation.fields_by_name.init(field_count);
} else {
assert(union_type->data.unionation.fields != nullptr);
field_count = union_type->data.unionation.src_field_count;
assert(field_count == 0 || union_type->data.unionation.fields != nullptr);
}
if (field_count == 0) {
add_node_error(g, decl_node, buf_sprintf("unions must have 1 or more fields"));
union_type->data.unionation.src_field_count = field_count;
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
Scope *scope = &union_type->data.unionation.decls_scope->base;
@ -3217,41 +3218,6 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
}
assert(field_type_val->special != ConstValSpecialRuntime);
union_field->type_val = field_type_val;
if (union_type->data.unionation.resolve_status == ResolveStatusInvalid)
return ErrorSemanticAnalyzeFail;
bool field_is_opaque_type;
if ((err = type_val_resolve_is_opaque_type(g, field_type_val, &field_is_opaque_type))) {
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
if (field_is_opaque_type) {
add_node_error(g, field_node,
buf_create_from_str(
"opaque types have unknown size and therefore cannot be directly embedded in unions"));
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
switch (type_val_resolve_requires_comptime(g, field_type_val)) {
case ReqCompTimeInvalid:
if (g->trace_err != nullptr) {
g->trace_err = add_error_note(g, g->trace_err, field_node,
buf_create_from_str("while checking this field"));
}
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
case ReqCompTimeYes:
union_type->data.unionation.requires_comptime = true;
break;
case ReqCompTimeNo:
break;
}
if ((err = type_val_resolve_zero_bits(g, field_type_val, union_type, nullptr, &is_zero_bits[i]))) {
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
}
if (field_node->data.struct_field.value != nullptr && !is_auto_enum) {
@ -3261,6 +3227,41 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
}
}
if (union_field->type_val != nullptr) {
bool field_is_opaque_type;
if ((err = type_val_resolve_is_opaque_type(g, union_field->type_val, &field_is_opaque_type))) {
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
if (field_is_opaque_type) {
add_node_error(g, union_field->decl_node,
buf_create_from_str(
"opaque types have unknown size and therefore cannot be directly embedded in unions"));
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
switch (type_val_resolve_requires_comptime(g, union_field->type_val)) {
case ReqCompTimeInvalid:
if (g->trace_err != nullptr) {
g->trace_err = add_error_note(g, g->trace_err, union_field->decl_node,
buf_create_from_str("while checking this field"));
}
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
case ReqCompTimeYes:
union_type->data.unionation.requires_comptime = true;
break;
case ReqCompTimeNo:
break;
}
if ((err = type_val_resolve_zero_bits(g, union_field->type_val, union_type, nullptr, &is_zero_bits[i]))) {
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
}
if (create_enum_type) {
di_enumerators[i] = ZigLLVMCreateDebugEnumerator(g->dbuilder, buf_ptr(union_field->name), i);
union_field->enum_field = &tag_type->data.enumeration.fields[i];

7
src/ir.cpp
View File

@ -26222,14 +26222,19 @@ static ZigType *type_info_to_type(IrAnalyze *ira, IrInst *source_instr, ZigTypeI
assert(payload->type == ir_type_info_get_type(ira, "Union", nullptr));
ZigValue *layout_value = get_const_field(ira, source_instr->source_node, payload, "layout", 0);
if (layout_value == nullptr)
return ira->codegen->invalid_inst_gen->value->type;
assert(layout_value->special == ConstValSpecialStatic);
assert(layout_value->type == ir_type_info_get_type(ira, "ContainerLayout", nullptr));
ContainerLayout layout = (ContainerLayout)bigint_as_u32(&layout_value->data.x_enum_tag);
ZigType *tag_type = get_const_field_meta_type_optional(ira, source_instr->source_node, payload, "tag_type", 1);
if (tag_type != nullptr && type_is_invalid(tag_type)) {
return ira->codegen->invalid_inst_gen->value->type;
}
if (tag_type != nullptr && tag_type->id != ZigTypeIdEnum) {
ir_add_error(ira, source_instr, buf_sprintf(
"union tag type must be an enum, not %s", type_id_name(tag_type->id)));
"expected enum type, found '%s'", type_id_name(tag_type->id)));
return ira->codegen->invalid_inst_gen->value->type;
}

57
test/compile_errors.zig
View File

@ -10,6 +10,63 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
"tmp.zig:2:37: error: expected type '[:1]const u8', found '*const [2:2]u8'",
});
cases.add("@Type for union with opaque field",
\\const TypeInfo = @import("builtin").TypeInfo;
\\const Untagged = @Type(.{
\\ .Union = .{
\\ .layout = .Auto,
\\ .tag_type = null,
\\ .fields = &[_]TypeInfo.UnionField{
\\ .{ .name = "foo", .field_type = @Type(.Opaque) },
\\ },
\\ .decls = &[_]TypeInfo.Declaration{},
\\ },
\\});
\\export fn entry() void {
\\ _ = Untagged{};
\\}
, &[_][]const u8{
"tmp.zig:2:25: error: opaque types have unknown size and therefore cannot be directly embedded in unions",
"tmp.zig:13:17: note: referenced here",
});
cases.add("@Type for union with zero fields",
\\const TypeInfo = @import("builtin").TypeInfo;
\\const Untagged = @Type(.{
\\ .Union = .{
\\ .layout = .Auto,
\\ .tag_type = null,
\\ .fields = &[_]TypeInfo.UnionField{},
\\ .decls = &[_]TypeInfo.Declaration{},
\\ },
\\});
\\export fn entry() void {
\\ _ = Untagged{};
\\}
, &[_][]const u8{
"tmp.zig:2:25: error: unions must have 1 or more fields",
"tmp.zig:11:17: note: referenced here",
});
cases.add("@Type for exhaustive enum with zero fields",
\\const TypeInfo = @import("builtin").TypeInfo;
\\const Tag = @Type(.{
\\ .Enum = .{
\\ .layout = .Auto,
\\ .tag_type = u1,
\\ .fields = &[_]TypeInfo.EnumField{},
\\ .decls = &[_]TypeInfo.Declaration{},
\\ .is_exhaustive = true,
\\ },
\\});
\\export fn entry() void {
\\ _ = @intToEnum(Tag, 0);
\\}
, &[_][]const u8{
"tmp.zig:2:20: error: enums must have 1 or more fields",
"tmp.zig:12:9: note: referenced here",
});
cases.add("@Type for tagged union with extra union field",
\\const TypeInfo = @import("builtin").TypeInfo;
\\const Tag = @Type(.{