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fix abi alignment of union-enums not counting tag type

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add more tests for unions

See #618
This commit is contained in:
Andrew Kelley
2017-12-04 00:32:12 -05:00
parent 5a8367e892
commit fce435db26
4 changed files with 291 additions and 194 deletions
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47
test/compile_errors.zig
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@@ -2524,4 +2524,51 @@ pub fn addCases(cases: &tests.CompileErrorContext) {
,
".tmp_source.zig:6:17: error: enum field missing: 'C'",
".tmp_source.zig:4:5: note: declared here");
cases.add("@TagType when union has no attached enum",
\\const Foo = union {
\\ A: i32,
\\};
\\export fn entry() {
\\ const x = @TagType(Foo);
\\}
,
".tmp_source.zig:5:24: error: union 'Foo' has no tag",
".tmp_source.zig:1:13: note: consider 'union(enum)' here");
cases.add("non-integer tag type to automatic union enum",
\\const Foo = union(enum(f32)) {
\\ A: i32,
\\};
\\export fn entry() {
\\ const x = @TagType(Foo);
\\}
,
".tmp_source.zig:1:23: error: expected integer tag type, found 'f32'");
cases.add("non-enum tag type passed to union",
\\const Foo = union(u32) {
\\ A: i32,
\\};
\\export fn entry() {
\\ const x = @TagType(Foo);
\\}
,
".tmp_source.zig:1:18: error: expected enum tag type, found 'u32'");
cases.add("union auto-enum value already taken",
\\const MultipleChoice = union(enum(u32)) {
\\ A = 20,
\\ B = 40,
\\ C = 60,
\\ D = 1000,
\\ E = 60,
\\};
\\export fn entry() {
\\ var x = MultipleChoice { .C = {} };
\\}
,
".tmp_source.zig:6:9: error: enum tag value 60 already taken",
".tmp_source.zig:4:9: note: other occurrence here");
}