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author | Robert Griesemer <gri@golang.org> | 2021-08-26 12:27:06 -0700 |
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committer | Robert Griesemer <gri@golang.org> | 2021-08-26 20:39:56 +0000 |
commit | af80af22b507ae23ae04372f30b98f7720c85f8a (patch) | |
tree | 4736603bb7007667634985efcb7759825d75ab05 /src/cmd/compile/internal/types2/testdata/fixedbugs/issue47968.go2 | |
parent | 03db2c24136939416903b284a19905d97ceea40d (diff) | |
download | go-af80af22b507ae23ae04372f30b98f7720c85f8a.tar.gz go-af80af22b507ae23ae04372f30b98f7720c85f8a.zip |
cmd/compile/internal/types2: do not declare new methods on instantiated types
Report an error if an alias is used to declare a method on an
instantiated type.
Also, when resolving the receiver type, don't use asNamed to
avoid premature expansion of the type.
Fixes #47968.
Change-Id: Ie5acc4cfb1944deaaeeaee98707f31e256f8ef5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/345472
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Diffstat (limited to 'src/cmd/compile/internal/types2/testdata/fixedbugs/issue47968.go2')
-rw-r--r-- | src/cmd/compile/internal/types2/testdata/fixedbugs/issue47968.go2 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/types2/testdata/fixedbugs/issue47968.go2 b/src/cmd/compile/internal/types2/testdata/fixedbugs/issue47968.go2 new file mode 100644 index 0000000000..bbbe6805f2 --- /dev/null +++ b/src/cmd/compile/internal/types2/testdata/fixedbugs/issue47968.go2 @@ -0,0 +1,21 @@ +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package p + +type T[P any] struct{} + +func (T[P]) m1() + +type A1 = T + +func (A1[P]) m2() {} + +type A2 = T[int] + +func (A2 /* ERROR cannot define methods on instantiated type T\[int\] */) m3() {} +func (_ /* ERROR cannot define methods on instantiated type T\[int\] */ A2) m4() {} + +func (T[int]) m5() {} // int is the type parameter name, not an instantiation +func (T[* /* ERROR must be an identifier */ int]) m6() {} // syntax error |