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extern structs support comptime bitcasting

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This commit is contained in:
Andrew Kelley
2019-02-21 08:46:43 -05:00
parent 3ee9d06cbd
commit db31c2524d
2 changed files with 42 additions and 3 deletions
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17
src/ir.cpp
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@@ -20923,8 +20923,19 @@ static void buf_write_value_bytes(CodeGen *codegen, uint8_t *buf, ConstExprValue
switch (val->type->data.structure.layout) {
case ContainerLayoutAuto:
zig_unreachable();
case ContainerLayoutExtern:
zig_panic("TODO buf_write_value_bytes extern struct");
case ContainerLayoutExtern: {
size_t src_field_count = val->type->data.structure.src_field_count;
for (size_t field_i = 0; field_i < src_field_count; field_i += 1) {
TypeStructField *type_field = &val->type->data.structure.fields[field_i];
if (type_field->gen_index == SIZE_MAX)
continue;
ConstExprValue *field_val = &val->data.x_struct.fields[field_i];
size_t offset = LLVMOffsetOfElement(codegen->target_data_ref, val->type->type_ref,
type_field->gen_index);
buf_write_value_bytes(codegen, buf + offset, field_val);
}
return;
}
case ContainerLayoutPacked: {
size_t src_field_count = val->type->data.structure.src_field_count;
size_t gen_field_count = val->type->data.structure.gen_field_count;
@@ -20979,9 +20990,9 @@ static void buf_write_value_bytes(CodeGen *codegen, uint8_t *buf, ConstExprValue
offset += big_int_byte_count;
gen_i += 1;
}
return;
}
}
return;
case ZigTypeIdOptional:
zig_panic("TODO buf_write_value_bytes maybe type");
case ZigTypeIdErrorUnion: