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Union tag stored as an integer

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This commit is contained in:
Ginger Bill
2017-10-08 15:16:13 +01:00
parent 4e42d7df43
commit 6424966b7a
7 changed files with 151 additions and 124 deletions
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core/_preload.odin
+1
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@@ -86,6 +86,7 @@ Type_Info_Struct :: struct #ordered {
Type_Info_Union :: struct #ordered {
variants: []^Type_Info,
tag_offset: int,
tag_type: ^Type_Info,
};
Type_Info_Enum :: struct #ordered {
base: ^Type_Info,
core/fmt.odin
+20 -5
View File
@@ -920,11 +920,28 @@ fmt_value :: proc(fi: ^Fmt_Info, v: any, verb: rune) {
case Type_Info_Union:
data := cast(^u8)v.data;
tipp := cast(^^Type_Info)(data + info.tag_offset);
if data == nil || tipp == nil {
tag_ptr := rawptr(data + info.tag_offset);
tag_any := any{tag_ptr, info.tag_type};
tag: i64 = -1;
switch i in tag_any {
case u8: tag = i64(i);
case i8: tag = i64(i);
case u16: tag = i64(i);
case i16: tag = i64(i);
case u32: tag = i64(i);
case i32: tag = i64(i);
case u64: tag = i64(i);
case i64: tag = i64(i);
case u128: tag = i64(i);
case i128: tag = i64(i);
case: panic("Invalid union tag type");
}
if data == nil || tag < 0 {
write_string(fi.buf, "(union)");
} else {
ti := tipp^;
ti := info.variants[tag-1];
fmt_arg(fi, any{data, ti}, verb);
}
@@ -1007,10 +1024,8 @@ fmt_arg :: proc(fi: ^Fmt_Info, arg: any, verb: rune) {
case u64: fmt_int(fi, u128(a), false, 64, verb);
case u128: fmt_int(fi, u128(a), false, 128, verb);
case string: fmt_string(fi, a, verb);
case: fmt_value(fi, arg, verb);
}