Commit ff2ed966bb
Changed files (6)
lib/std/builtin.zig
@@ -317,7 +317,6 @@ pub const TypeInfo = union(enum) {
/// therefore must be kept in sync with the compiler implementation.
pub const UnionField = struct {
name: []const u8,
- enum_field: ?EnumField,
field_type: type,
};
src/analyze.cpp
@@ -2372,7 +2372,10 @@ static Error resolve_union_alignment(CodeGen *g, ZigType *union_type) {
if (field->gen_index == UINT32_MAX)
continue;
- AstNode *align_expr = field->decl_node->data.struct_field.align_expr;
+ AstNode *align_expr = nullptr;
+ if (union_type->data.unionation.decl_node->type == NodeTypeContainerDecl) {
+ align_expr = field->decl_node->data.struct_field.align_expr;
+ }
if (align_expr != nullptr) {
if (!analyze_const_align(g, &union_type->data.unionation.decls_scope->base, align_expr,
&field->align))
@@ -2468,9 +2471,6 @@ static Error resolve_union_type(CodeGen *g, ZigType *union_type) {
AstNode *decl_node = union_type->data.unionation.decl_node;
-
- assert(decl_node->type == NodeTypeContainerDecl);
-
uint32_t field_count = union_type->data.unionation.src_field_count;
TypeUnionField *most_aligned_union_member = union_type->data.unionation.most_aligned_union_member;
@@ -3055,7 +3055,6 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
return ErrorNone;
AstNode *decl_node = union_type->data.unionation.decl_node;
- assert(decl_node->type == NodeTypeContainerDecl);
if (union_type->data.unionation.resolve_loop_flag_zero_bits) {
if (union_type->data.unionation.resolve_status != ResolveStatusInvalid) {
@@ -3069,30 +3068,50 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
union_type->data.unionation.resolve_loop_flag_zero_bits = true;
- assert(union_type->data.unionation.fields == nullptr);
- uint32_t 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"));
+ uint32_t field_count;
+ 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.resolve_status = ResolveStatusInvalid;
- return ErrorSemanticAnalyzeFail;
+ 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;
}
- 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);
Scope *scope = &union_type->data.unionation.decls_scope->base;
HashMap<BigInt, AstNode *, bigint_hash, bigint_eql> occupied_tag_values = {};
- AstNode *enum_type_node = decl_node->data.container_decl.init_arg_expr;
- union_type->data.unionation.have_explicit_tag_type = decl_node->data.container_decl.auto_enum ||
- enum_type_node != nullptr;
- bool auto_layout = (union_type->data.unionation.layout == ContainerLayoutAuto);
- bool want_safety = (field_count >= 2) && (auto_layout || enum_type_node != nullptr) && !(g->build_mode == BuildModeFastRelease || g->build_mode == BuildModeSmallRelease);
+ bool is_auto_enum; // union(enum) or union(enum(expr))
+ bool is_explicit_enum; // union(expr)
+ AstNode *enum_type_node; // expr in union(enum(expr)) or union(expr)
+ if (decl_node->type == NodeTypeContainerDecl) {
+ is_auto_enum = decl_node->data.container_decl.auto_enum;
+ is_explicit_enum = decl_node->data.container_decl.init_arg_expr != nullptr;
+ enum_type_node = decl_node->data.container_decl.init_arg_expr;
+ } else {
+ is_auto_enum = false;
+ is_explicit_enum = union_type->data.unionation.tag_type != nullptr;
+ enum_type_node = nullptr;
+ }
+ union_type->data.unionation.have_explicit_tag_type = is_auto_enum || is_explicit_enum;
+
+ bool is_auto_layout = union_type->data.unionation.layout == ContainerLayoutAuto;
+ bool want_safety = (field_count >= 2)
+ && (is_auto_layout || is_explicit_enum)
+ && !(g->build_mode == BuildModeFastRelease || g->build_mode == BuildModeSmallRelease);
ZigType *tag_type;
- bool create_enum_type = decl_node->data.container_decl.auto_enum || (enum_type_node == nullptr && want_safety);
+ bool create_enum_type = is_auto_enum || (!is_explicit_enum && want_safety);
bool *covered_enum_fields;
+ bool *is_zero_bits = heap::c_allocator.allocate<bool>(field_count);
ZigLLVMDIEnumerator **di_enumerators;
if (create_enum_type) {
occupied_tag_values.init(field_count);
@@ -3150,105 +3169,111 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
return err;
}
tag_type = enum_type;
- covered_enum_fields = heap::c_allocator.allocate<bool>(enum_type->data.enumeration.src_field_count);
} else {
- tag_type = nullptr;
+ if (decl_node->type == NodeTypeContainerDecl) {
+ tag_type = nullptr;
+ } else {
+ tag_type = union_type->data.unionation.tag_type;
+ }
+ }
+ if (tag_type != nullptr) {
+ covered_enum_fields = heap::c_allocator.allocate<bool>(tag_type->data.enumeration.src_field_count);
}
union_type->data.unionation.tag_type = tag_type;
- uint32_t gen_field_index = 0;
for (uint32_t i = 0; i < field_count; i += 1) {
- AstNode *field_node = decl_node->data.container_decl.fields.at(i);
- Buf *field_name = field_node->data.struct_field.name;
TypeUnionField *union_field = &union_type->data.unionation.fields[i];
- union_field->name = field_node->data.struct_field.name;
- union_field->decl_node = field_node;
- union_field->gen_index = UINT32_MAX;
-
- auto field_entry = union_type->data.unionation.fields_by_name.put_unique(union_field->name, union_field);
- if (field_entry != nullptr) {
- ErrorMsg *msg = add_node_error(g, field_node,
- buf_sprintf("duplicate union field: '%s'", buf_ptr(union_field->name)));
- add_error_note(g, msg, field_entry->value->decl_node, buf_sprintf("other field here"));
- union_type->data.unionation.resolve_status = ResolveStatusInvalid;
- return ErrorSemanticAnalyzeFail;
- }
+ if (decl_node->type == NodeTypeContainerDecl) {
+ AstNode *field_node = decl_node->data.container_decl.fields.at(i);
+ union_field->name = field_node->data.struct_field.name;
+ union_field->decl_node = field_node;
+ union_field->gen_index = UINT32_MAX;
+ is_zero_bits[i] = false;
- bool field_is_zero_bits;
- if (field_node->data.struct_field.type == nullptr) {
- if (decl_node->data.container_decl.auto_enum ||
- decl_node->data.container_decl.init_arg_expr != nullptr)
- {
- union_field->type_entry = g->builtin_types.entry_void;
- field_is_zero_bits = true;
- } else {
- add_node_error(g, field_node, buf_sprintf("union field missing type"));
- union_type->data.unionation.resolve_status = ResolveStatusInvalid;
- return ErrorSemanticAnalyzeFail;
- }
- } else {
- ZigValue *field_type_val = analyze_const_value(g, scope,
- field_node->data.struct_field.type, g->builtin_types.entry_type, nullptr, LazyOkNoUndef);
- if (type_is_invalid(field_type_val->type)) {
+ auto field_entry = union_type->data.unionation.fields_by_name.put_unique(union_field->name, union_field);
+ if (field_entry != nullptr) {
+ ErrorMsg *msg = add_node_error(g, union_field->decl_node,
+ buf_sprintf("duplicate union field: '%s'", buf_ptr(union_field->name)));
+ add_error_note(g, msg, field_entry->value->decl_node, buf_sprintf("other field here"));
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
return ErrorSemanticAnalyzeFail;
}
- 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;
- }
+ if (field_node->data.struct_field.type == nullptr) {
+ if (is_auto_enum || is_explicit_enum) {
+ union_field->type_entry = g->builtin_types.entry_void;
+ is_zero_bits[i] = true;
+ } else {
+ add_node_error(g, field_node, buf_sprintf("union field missing type"));
+ union_type->data.unionation.resolve_status = ResolveStatusInvalid;
+ return ErrorSemanticAnalyzeFail;
+ }
+ } else {
+ ZigValue *field_type_val = analyze_const_value(g, scope,
+ field_node->data.struct_field.type, g->builtin_types.entry_type, nullptr, LazyOkNoUndef);
+ if (type_is_invalid(field_type_val->type)) {
+ union_type->data.unionation.resolve_status = ResolveStatusInvalid;
+ return ErrorSemanticAnalyzeFail;
+ }
+ assert(field_type_val->special != ConstValSpecialRuntime);
+ union_field->type_val = field_type_val;
+ if (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"));
- }
+ 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;
- case ReqCompTimeYes:
- union_type->data.unionation.requires_comptime = true;
- break;
- case ReqCompTimeNo:
- break;
- }
+ }
+ 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;
+ }
- if ((err = type_val_resolve_zero_bits(g, field_type_val, union_type, nullptr, &field_is_zero_bits))) {
- 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 && !decl_node->data.container_decl.auto_enum) {
- ErrorMsg *msg = add_node_error(g, field_node->data.struct_field.value,
- buf_create_from_str("untagged union field assignment"));
- add_error_note(g, msg, decl_node, buf_create_from_str("consider 'union(enum)' here"));
+ if (field_node->data.struct_field.value != nullptr && !is_auto_enum) {
+ ErrorMsg *msg = add_node_error(g, field_node->data.struct_field.value,
+ buf_create_from_str("untagged union field assignment"));
+ add_error_note(g, msg, decl_node, buf_create_from_str("consider 'union(enum)' here"));
+ }
}
if (create_enum_type) {
- di_enumerators[i] = ZigLLVMCreateDebugEnumerator(g->dbuilder, buf_ptr(field_name), i);
+ di_enumerators[i] = ZigLLVMCreateDebugEnumerator(g->dbuilder, buf_ptr(union_field->name), i);
union_field->enum_field = &tag_type->data.enumeration.fields[i];
- union_field->enum_field->name = field_name;
+ union_field->enum_field->name = union_field->name;
union_field->enum_field->decl_index = i;
- union_field->enum_field->decl_node = field_node;
+ union_field->enum_field->decl_node = union_field->decl_node;
auto prev_entry = tag_type->data.enumeration.fields_by_name.put_unique(union_field->enum_field->name, union_field->enum_field);
assert(prev_entry == nullptr); // caught by union de-duplicator above
- AstNode *tag_value = field_node->data.struct_field.value;
+ AstNode *tag_value = decl_node->type == NodeTypeContainerDecl
+ ? union_field->decl_node->data.struct_field.value : nullptr;
+
// In this first pass we resolve explicit tag values.
// In a second pass we will fill in the unspecified ones.
if (tag_value != nullptr) {
@@ -3276,11 +3301,11 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
return ErrorSemanticAnalyzeFail;
}
}
- } else if (enum_type_node != nullptr) {
- union_field->enum_field = find_enum_type_field(tag_type, field_name);
+ } else if (tag_type != nullptr) {
+ union_field->enum_field = find_enum_type_field(tag_type, union_field->name);
if (union_field->enum_field == nullptr) {
- ErrorMsg *msg = add_node_error(g, field_node,
- buf_sprintf("enum field not found: '%s'", buf_ptr(field_name)));
+ ErrorMsg *msg = add_node_error(g, union_field->decl_node,
+ buf_sprintf("enum field not found: '%s'", buf_ptr(union_field->name)));
add_error_note(g, msg, tag_type->data.enumeration.decl_node,
buf_sprintf("enum declared here"));
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
@@ -3289,21 +3314,23 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
covered_enum_fields[union_field->enum_field->decl_index] = true;
} else {
union_field->enum_field = heap::c_allocator.create<TypeEnumField>();
- union_field->enum_field->name = field_name;
+ union_field->enum_field->name = union_field->name;
union_field->enum_field->decl_index = i;
bigint_init_unsigned(&union_field->enum_field->value, i);
}
assert(union_field->enum_field != nullptr);
+ }
- if (field_is_zero_bits)
- continue;
-
- union_field->gen_index = gen_field_index;
- gen_field_index += 1;
+ uint32_t gen_field_index = 0;
+ for (uint32_t i = 0; i < field_count; i += 1) {
+ TypeUnionField *union_field = &union_type->data.unionation.fields[i];
+ if (!is_zero_bits[i]) {
+ union_field->gen_index = gen_field_index;
+ gen_field_index += 1;
+ }
}
- bool src_have_tag = decl_node->data.container_decl.auto_enum ||
- decl_node->data.container_decl.init_arg_expr != nullptr;
+ bool src_have_tag = is_auto_enum || is_explicit_enum;
if (src_have_tag && union_type->data.unionation.layout != ContainerLayoutAuto) {
const char *qual_str;
@@ -3317,8 +3344,7 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
qual_str = "extern";
break;
}
- AstNode *source_node = (decl_node->data.container_decl.init_arg_expr != nullptr) ?
- decl_node->data.container_decl.init_arg_expr : decl_node;
+ AstNode *source_node = enum_type_node != nullptr ? enum_type_node : decl_node;
add_node_error(g, source_node,
buf_sprintf("%s union does not support enum tag type", qual_str));
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
@@ -3326,43 +3352,47 @@ static Error resolve_union_zero_bits(CodeGen *g, ZigType *union_type) {
}
if (create_enum_type) {
- // Now iterate again and populate the unspecified tag values
- uint32_t next_maybe_unoccupied_index = 0;
+ if (decl_node->type == NodeTypeContainerDecl) {
+ // Now iterate again and populate the unspecified tag values
+ uint32_t next_maybe_unoccupied_index = 0;
- for (uint32_t field_i = 0; field_i < field_count; field_i += 1) {
- AstNode *field_node = decl_node->data.container_decl.fields.at(field_i);
- TypeUnionField *union_field = &union_type->data.unionation.fields[field_i];
- AstNode *tag_value = field_node->data.struct_field.value;
+ for (uint32_t field_i = 0; field_i < field_count; field_i += 1) {
+ AstNode *field_node = decl_node->data.container_decl.fields.at(field_i);
+ TypeUnionField *union_field = &union_type->data.unionation.fields[field_i];
+ AstNode *tag_value = field_node->data.struct_field.value;
- if (tag_value == nullptr) {
- if (occupied_tag_values.size() == 0) {
- bigint_init_unsigned(&union_field->enum_field->value, next_maybe_unoccupied_index);
- next_maybe_unoccupied_index += 1;
- } else {
- BigInt proposed_value;
- for (;;) {
- bigint_init_unsigned(&proposed_value, next_maybe_unoccupied_index);
+ if (tag_value == nullptr) {
+ if (occupied_tag_values.size() == 0) {
+ bigint_init_unsigned(&union_field->enum_field->value, next_maybe_unoccupied_index);
next_maybe_unoccupied_index += 1;
- auto entry = occupied_tag_values.put_unique(proposed_value, field_node);
- if (entry != nullptr) {
- continue;
+ } else {
+ BigInt proposed_value;
+ for (;;) {
+ bigint_init_unsigned(&proposed_value, next_maybe_unoccupied_index);
+ next_maybe_unoccupied_index += 1;
+ auto entry = occupied_tag_values.put_unique(proposed_value, field_node);
+ if (entry != nullptr) {
+ continue;
+ }
+ break;
}
- break;
+ bigint_init_bigint(&union_field->enum_field->value, &proposed_value);
}
- bigint_init_bigint(&union_field->enum_field->value, &proposed_value);
}
}
}
- } else if (enum_type_node != nullptr) {
+ } else if (tag_type != nullptr) {
for (uint32_t i = 0; i < tag_type->data.enumeration.src_field_count; i += 1) {
TypeEnumField *enum_field = &tag_type->data.enumeration.fields[i];
if (!covered_enum_fields[i]) {
- AstNode *enum_decl_node = tag_type->data.enumeration.decl_node;
- AstNode *field_node = enum_decl_node->data.container_decl.fields.at(i);
ErrorMsg *msg = add_node_error(g, decl_node,
buf_sprintf("enum field missing: '%s'", buf_ptr(enum_field->name)));
- add_error_note(g, msg, field_node,
- buf_sprintf("declared here"));
+ if (decl_node->type == NodeTypeContainerDecl) {
+ AstNode *enum_decl_node = tag_type->data.enumeration.decl_node;
+ AstNode *field_node = enum_decl_node->data.container_decl.fields.at(i);
+ add_error_note(g, msg, field_node,
+ buf_sprintf("declared here"));
+ }
union_type->data.unionation.resolve_status = ResolveStatusInvalid;
}
}
@@ -8350,7 +8380,7 @@ static void resolve_llvm_types_struct(CodeGen *g, ZigType *struct_type, ResolveS
ZigLLVMDIFile *di_file;
ZigLLVMDIScope *di_scope;
unsigned line;
- if (decl_node != nullptr && !struct_type->data.structure.created_by_at_type) {
+ if (decl_node != nullptr) {
Scope *scope = &struct_type->data.structure.decls_scope->base;
ZigType *import = get_scope_import(scope);
di_file = import->data.structure.root_struct->di_file;
@@ -8713,7 +8743,7 @@ static void resolve_llvm_types_union(CodeGen *g, ZigType *union_type, ResolveSta
uint64_t store_size_in_bits = union_field->type_entry->size_in_bits;
uint64_t abi_align_in_bits = 8*union_field->type_entry->abi_align;
- AstNode *field_node = decl_node->data.container_decl.fields.at(i);
+ AstNode *field_node = union_field->decl_node;
union_inner_di_types[union_field->gen_index] = ZigLLVMCreateDebugMemberType(g->dbuilder,
ZigLLVMTypeToScope(union_type->llvm_di_type), buf_ptr(union_field->enum_field->name),
import->data.structure.root_struct->di_file, (unsigned)(field_node->line + 1),
src/ir.cpp
@@ -25424,8 +25424,6 @@ static Error ir_make_type_info_value(IrAnalyze *ira, IrInst* source_instr, ZigTy
init_const_slice(ira->codegen, fields[2], union_field_array, 0, union_field_count, false);
- ZigType *type_info_enum_field_type = ir_type_info_get_type(ira, "EnumField", nullptr);
-
for (uint32_t union_field_index = 0; union_field_index < union_field_count; union_field_index++) {
TypeUnionField *union_field = &type_entry->data.unionation.fields[union_field_index];
ZigValue *union_field_val = &union_field_array->data.x_array.data.s_none.elements[union_field_index];
@@ -25433,20 +25431,10 @@ static Error ir_make_type_info_value(IrAnalyze *ira, IrInst* source_instr, ZigTy
union_field_val->special = ConstValSpecialStatic;
union_field_val->type = type_info_union_field_type;
- ZigValue **inner_fields = alloc_const_vals_ptrs(ira->codegen, 3);
+ ZigValue **inner_fields = alloc_const_vals_ptrs(ira->codegen, 2);
inner_fields[1]->special = ConstValSpecialStatic;
- inner_fields[1]->type = get_optional_type(ira->codegen, type_info_enum_field_type);
-
- if (fields[1]->data.x_optional == nullptr) {
- inner_fields[1]->data.x_optional = nullptr;
- } else {
- inner_fields[1]->data.x_optional = ira->codegen->pass1_arena->create<ZigValue>();
- make_enum_field_val(ira, inner_fields[1]->data.x_optional, union_field->enum_field, type_info_enum_field_type);
- }
-
- inner_fields[2]->special = ConstValSpecialStatic;
- inner_fields[2]->type = ira->codegen->builtin_types.entry_type;
- inner_fields[2]->data.x_type = union_field->type_entry;
+ inner_fields[1]->type = ira->codegen->builtin_types.entry_type;
+ inner_fields[1]->data.x_type = union_field->type_entry;
ZigValue *name = create_const_str_lit(ira->codegen, union_field->name)->data.x_ptr.data.ref.pointee;
init_const_slice(ira->codegen, inner_fields[0], name, 0, buf_len(union_field->name), true);
@@ -26102,7 +26090,8 @@ static ZigType *type_info_to_type(IrAnalyze *ira, IrInst *source_instr, ZigTypeI
entry->data.structure.layout = layout;
entry->data.structure.special = is_tuple ? StructSpecialInferredTuple : StructSpecialNone;
entry->data.structure.created_by_at_type = true;
- entry->data.structure.decls_scope = create_decls_scope(ira->codegen, nullptr, nullptr, entry, entry, &entry->name);
+ entry->data.structure.decls_scope = create_decls_scope(
+ ira->codegen, source_instr->source_node, source_instr->scope, entry, get_scope_import(source_instr->scope), &entry->name);
assert(fields_ptr->data.x_ptr.special == ConstPtrSpecialBaseArray);
assert(fields_ptr->data.x_ptr.data.base_array.elem_index == 0);
@@ -26226,13 +26215,84 @@ static ZigType *type_info_to_type(IrAnalyze *ira, IrInst *source_instr, ZigTypeI
return ira->codegen->invalid_inst_gen->value->type;
field->value = *field_int_value;
}
+ return entry;
+ }
+ case ZigTypeIdUnion: {
+ assert(payload->special == ConstValSpecialStatic);
+ 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);
+ 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 && 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)));
+ return ira->codegen->invalid_inst_gen->value->type;
+ }
+
+ ZigValue *fields_value = get_const_field(ira, source_instr->source_node, payload, "fields", 2);
+ if (fields_value == nullptr)
+ return ira->codegen->invalid_inst_gen->value->type;
+
+ assert(fields_value->special == ConstValSpecialStatic);
+ assert(is_slice(fields_value->type));
+ ZigValue *fields_ptr = fields_value->data.x_struct.fields[slice_ptr_index];
+ ZigValue *fields_len_value = fields_value->data.x_struct.fields[slice_len_index];
+ size_t fields_len = bigint_as_usize(&fields_len_value->data.x_bigint);
+
+ ZigValue *decls_value = get_const_field(ira, source_instr->source_node, payload, "decls", 3);
+ if (decls_value == nullptr)
+ return ira->codegen->invalid_inst_gen->value->type;
+
+ assert(decls_value->special == ConstValSpecialStatic);
+ assert(is_slice(decls_value->type));
+ ZigValue *decls_len_value = decls_value->data.x_struct.fields[slice_len_index];
+ size_t decls_len = bigint_as_usize(&decls_len_value->data.x_bigint);
+ if (decls_len != 0) {
+ ir_add_error(ira, source_instr, buf_create_from_str("TypeInfo.Union.decls must be empty for @Type"));
+ return ira->codegen->invalid_inst_gen->value->type;
+ }
+
+ ZigType *entry = new_type_table_entry(ZigTypeIdUnion);
+ buf_init_from_buf(&entry->name,
+ get_anon_type_name(ira->codegen, ira->old_irb.exec, "union", source_instr->scope, source_instr->source_node, &entry->name));
+ entry->data.unionation.decl_node = source_instr->source_node;
+ entry->data.unionation.fields = heap::c_allocator.allocate<TypeUnionField>(fields_len);
+ entry->data.unionation.fields_by_name.init(fields_len);
+ entry->data.unionation.decls_scope = create_decls_scope(
+ ira->codegen, source_instr->source_node, source_instr->scope, entry, get_scope_import(source_instr->scope), &entry->name);
+ entry->data.unionation.tag_type = tag_type;
+ entry->data.unionation.src_field_count = fields_len;
+ entry->data.unionation.layout = layout;
+
+ assert(fields_ptr->data.x_ptr.special == ConstPtrSpecialBaseArray);
+ assert(fields_ptr->data.x_ptr.data.base_array.elem_index == 0);
+ ZigValue *fields_arr = fields_ptr->data.x_ptr.data.base_array.array_val;
+ assert(fields_arr->special == ConstValSpecialStatic);
+ assert(fields_arr->data.x_array.special == ConstArraySpecialNone);
+ for (size_t i = 0; i < fields_len; i++) {
+ ZigValue *field_value = &fields_arr->data.x_array.data.s_none.elements[i];
+ assert(field_value->type == ir_type_info_get_type(ira, "UnionField", nullptr));
+ TypeUnionField *field = &entry->data.unionation.fields[i];
+ field->name = buf_alloc();
+ if ((err = get_const_field_buf(ira, source_instr->source_node, field_value, "name", 0, field->name)))
+ return ira->codegen->invalid_inst_gen->value->type;
+ if (entry->data.unionation.fields_by_name.put_unique(field->name, field) != nullptr) {
+ ir_add_error(ira, source_instr, buf_sprintf("duplicate union field '%s'", buf_ptr(field->name)));
+ return ira->codegen->invalid_inst_gen->value->type;
+ }
+ field->decl_node = source_instr->source_node;
+ ZigValue *type_value = get_const_field(ira, source_instr->source_node, field_value, "field_type", 1);
+ if (type_value == nullptr)
+ return ira->codegen->invalid_inst_gen->value->type;
+ field->type_val = type_value;
+ field->type_entry = type_value->data.x_type;
+ }
return entry;
}
- case ZigTypeIdUnion:
- ir_add_error(ira, source_instr, buf_sprintf(
- "TODO implement @Type for 'TypeInfo.%s': see https://github.com/ziglang/zig/issues/2907", type_id_name(tagTypeId)));
- return ira->codegen->invalid_inst_gen->value->type;
case ZigTypeIdFn:
case ZigTypeIdBoundFn:
ir_add_error(ira, source_instr, buf_sprintf(
test/stage1/behavior/type.zig
@@ -313,3 +313,64 @@ test "Type.Enum" {
testing.expectEqual(@as(u32, 5), @enumToInt(Bar.b));
testing.expectEqual(@as(u32, 6), @enumToInt(@intToEnum(Bar, 6)));
}
+
+test "Type.Union" {
+ const Untagged = @Type(.{
+ .Union = .{
+ .layout = .Auto,
+ .tag_type = null,
+ .fields = &[_]TypeInfo.UnionField{
+ .{ .name = "int", .field_type = i32 },
+ .{ .name = "float", .field_type = f32 },
+ },
+ .decls = &[_]TypeInfo.Declaration{},
+ },
+ });
+ var untagged = Untagged{ .int = 1 };
+ untagged.float = 2.0;
+ untagged.int = 3;
+ testing.expectEqual(@as(i32, 3), untagged.int);
+
+ const PackedUntagged = @Type(.{
+ .Union = .{
+ .layout = .Packed,
+ .tag_type = null,
+ .fields = &[_]TypeInfo.UnionField{
+ .{ .name = "signed", .field_type = i32 },
+ .{ .name = "unsigned", .field_type = u32 },
+ },
+ .decls = &[_]TypeInfo.Declaration{},
+ },
+ });
+ var packed_untagged = PackedUntagged{ .signed = -1 };
+ testing.expectEqual(@as(i32, -1), packed_untagged.signed);
+ testing.expectEqual(~@as(u32, 0), packed_untagged.unsigned);
+
+ const Tag = @Type(.{
+ .Enum = .{
+ .layout = .Auto,
+ .tag_type = u1,
+ .fields = &[_]TypeInfo.EnumField{
+ .{ .name = "signed", .value = 0 },
+ .{ .name = "unsigned", .value = 1 },
+ },
+ .decls = &[_]TypeInfo.Declaration{},
+ .is_exhaustive = true,
+ },
+ });
+ const Tagged = @Type(.{
+ .Union = .{
+ .layout = .Auto,
+ .tag_type = Tag,
+ .fields = &[_]TypeInfo.UnionField{
+ .{ .name = "signed", .field_type = i32 },
+ .{ .name = "unsigned", .field_type = u32 },
+ },
+ .decls = &[_]TypeInfo.Declaration{},
+ },
+ });
+ var tagged = Tagged{ .signed = -1 };
+ testing.expectEqual(Tag.signed, tagged);
+ tagged = .{ .unsigned = 1 };
+ testing.expectEqual(Tag.unsigned, tagged);
+}
test/stage1/behavior/type_info.zig
@@ -198,8 +198,6 @@ fn testUnion() void {
expect(typeinfo_info.Union.layout == .Auto);
expect(typeinfo_info.Union.tag_type.? == TypeId);
expect(typeinfo_info.Union.fields.len == 25);
- expect(typeinfo_info.Union.fields[4].enum_field != null);
- expect(typeinfo_info.Union.fields[4].enum_field.?.value == 4);
expect(typeinfo_info.Union.fields[4].field_type == @TypeOf(@typeInfo(u8).Int));
expect(typeinfo_info.Union.decls.len == 21);
@@ -213,7 +211,6 @@ fn testUnion() void {
expect(notag_union_info.Union.tag_type == null);
expect(notag_union_info.Union.layout == .Auto);
expect(notag_union_info.Union.fields.len == 2);
- expect(notag_union_info.Union.fields[0].enum_field == null);
expect(notag_union_info.Union.fields[1].field_type == u32);
const TestExternUnion = extern union {
@@ -223,7 +220,6 @@ fn testUnion() void {
const extern_union_info = @typeInfo(TestExternUnion);
expect(extern_union_info.Union.layout == .Extern);
expect(extern_union_info.Union.tag_type == null);
- expect(extern_union_info.Union.fields[0].enum_field == null);
expect(extern_union_info.Union.fields[0].field_type == *c_void);
}
test/compile_errors.zig
@@ -10,6 +10,78 @@ 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 tagged union with extra union field",
+ \\const TypeInfo = @import("builtin").TypeInfo;
+ \\const Tag = @Type(.{
+ \\ .Enum = .{
+ \\ .layout = .Auto,
+ \\ .tag_type = u1,
+ \\ .fields = &[_]TypeInfo.EnumField{
+ \\ .{ .name = "signed", .value = 0 },
+ \\ .{ .name = "unsigned", .value = 1 },
+ \\ },
+ \\ .decls = &[_]TypeInfo.Declaration{},
+ \\ .is_exhaustive = true,
+ \\ },
+ \\});
+ \\const Tagged = @Type(.{
+ \\ .Union = .{
+ \\ .layout = .Auto,
+ \\ .tag_type = Tag,
+ \\ .fields = &[_]TypeInfo.UnionField{
+ \\ .{ .name = "signed", .field_type = i32 },
+ \\ .{ .name = "unsigned", .field_type = u32 },
+ \\ .{ .name = "arst", .field_type = f32 },
+ \\ },
+ \\ .decls = &[_]TypeInfo.Declaration{},
+ \\ },
+ \\});
+ \\export fn entry() void {
+ \\ var tagged = Tagged{ .signed = -1 };
+ \\ tagged = .{ .unsigned = 1 };
+ \\}
+ , &[_][]const u8{
+ "tmp.zig:14:23: error: enum field not found: 'arst'",
+ "tmp.zig:2:20: note: enum declared here",
+ "tmp.zig:27:24: note: referenced here",
+ });
+
+ cases.add("@Type for tagged union with extra enum field",
+ \\const TypeInfo = @import("builtin").TypeInfo;
+ \\const Tag = @Type(.{
+ \\ .Enum = .{
+ \\ .layout = .Auto,
+ \\ .tag_type = u2,
+ \\ .fields = &[_]TypeInfo.EnumField{
+ \\ .{ .name = "signed", .value = 0 },
+ \\ .{ .name = "unsigned", .value = 1 },
+ \\ .{ .name = "arst", .field_type = 2 },
+ \\ },
+ \\ .decls = &[_]TypeInfo.Declaration{},
+ \\ .is_exhaustive = true,
+ \\ },
+ \\});
+ \\const Tagged = @Type(.{
+ \\ .Union = .{
+ \\ .layout = .Auto,
+ \\ .tag_type = Tag,
+ \\ .fields = &[_]TypeInfo.UnionField{
+ \\ .{ .name = "signed", .field_type = i32 },
+ \\ .{ .name = "unsigned", .field_type = u32 },
+ \\ },
+ \\ .decls = &[_]TypeInfo.Declaration{},
+ \\ },
+ \\});
+ \\export fn entry() void {
+ \\ var tagged = Tagged{ .signed = -1 };
+ \\ tagged = .{ .unsigned = 1 };
+ \\}
+ , &[_][]const u8{
+ "tmp.zig:9:32: error: no member named 'field_type' in struct 'std.builtin.EnumField'",
+ "tmp.zig:18:21: note: referenced here",
+ "tmp.zig:27:18: note: referenced here",
+ });
+
cases.add("@Type with undefined",
\\comptime {
\\ _ = @Type(.{ .Array = .{ .len = 0, .child = u8, .sentinel = undefined } });
@@ -7419,7 +7491,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
});
cases.add( // fixed bug #2032
- "compile diagnostic string for top level decl type",
+ "compile diagnostic string for top level decl type",
\\export fn entry() void {
\\ var foo: u32 = @This(){};
\\}