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Merge pull request #4590 from xackus/fix-4587

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fix failed assert on generic fn opaque return type
This commit is contained in:
Andrew Kelley
2020-03-09 22:10:57 -04:00
committed by GitHub
parent 1f44b29724 e7cc456421
commit 675f01f176
4 changed files with 68 additions and 24 deletions
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36
test/compile_errors.zig
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@@ -6558,9 +6558,41 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
\\export fn bar() !FooType {
\\ return error.InvalidValue;
\\}
\\export fn bav() !@TypeOf(null) {
\\ return error.InvalidValue;
\\}
\\export fn baz() !@TypeOf(undefined) {
\\ return error.InvalidValue;
\\}
, &[_][]const u8{
"tmp.zig:2:18: error: opaque return type 'FooType' not allowed",
"tmp.zig:1:1: note: declared here",
"tmp.zig:2:18: error: Opaque return type 'FooType' not allowed",
"tmp.zig:1:1: note: type declared here",
"tmp.zig:5:18: error: Null return type '(null)' not allowed",
"tmp.zig:8:18: error: Undefined return type '(undefined)' not allowed",
});
cases.add("generic function returning opaque type",
\\const FooType = @OpaqueType();
\\fn generic(comptime T: type) !T {
\\ return undefined;
\\}
\\export fn bar() void {
\\ _ = generic(FooType);
\\}
\\export fn bav() void {
\\ _ = generic(@TypeOf(null));
\\}
\\export fn baz() void {
\\ _ = generic(@TypeOf(undefined));
\\}
, &[_][]const u8{
"tmp.zig:6:16: error: call to generic function with Opaque return type 'FooType' not allowed",
"tmp.zig:2:1: note: function declared here",
"tmp.zig:1:1: note: type declared here",
"tmp.zig:9:16: error: call to generic function with Null return type '(null)' not allowed",
"tmp.zig:2:1: note: function declared here",
"tmp.zig:12:16: error: call to generic function with Undefined return type '(undefined)' not allowed",
"tmp.zig:2:1: note: function declared here",
});
cases.add( // fixed bug #2032