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encoding/cbor: fully support marshal/unmarshal of unions

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This commit is contained in:
Laytan Laats
2024-03-04 17:26:19 +01:00
parent 363769d4d3
commit d77ae9abab
4 changed files with 325 additions and 46 deletions
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core/encoding/cbor/marshal.odin
+25 -1
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@@ -506,8 +506,32 @@ marshal_into_encoder :: proc(e: Encoder, v: any) -> (err: Marshal_Error) {
if v.data == nil || tag <= 0 {
return _encode_nil(e.writer)
}
id := info.variants[tag-1].id
return marshal_into(e, any{v.data, id})
if len(info.variants) == 1 {
id := info.variants[tag-1].id
return marshal_into(e, any{v.data, id})
}
// Encode a non-nil multi-variant union as the `TAG_OBJECT_TYPE`.
// Which is a tag of an array, where the first element is the textual id/type of the object
// that follows it.
err_conv(_encode_u16(e, TAG_OBJECT_TYPE, .Tag)) or_return
_encode_u8(e.writer, 2, .Array) or_return
vti := reflect.union_variant_type_info(v)
#partial switch vt in vti.variant {
case reflect.Type_Info_Named:
err_conv(_encode_text(e, vt.name)) or_return
case:
builder := strings.builder_make(context.temp_allocator) or_return
defer strings.builder_destroy(&builder)
reflect.write_type(&builder, vti)
err_conv(_encode_text(e, strings.to_string(builder))) or_return
}
return marshal_into(e, any{v.data, vti.id})
case runtime.Type_Info_Enum:
return marshal_into(e, any{v.data, info.base.id})