diff options
author | Robert Griesemer <gri@golang.org> | 2021-06-02 17:05:37 -0700 |
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committer | Robert Griesemer <gri@golang.org> | 2021-06-03 03:55:37 +0000 |
commit | 10d6b36ca3f8d48a667742eee791dacbcfc888cd (patch) | |
tree | 019780ec6161df9fe256962e9cdf0c711a493bca /src/cmd/compile/internal/types2/testdata | |
parent | 8cdce85bdf80f6aa9bd3979d3ecab6565512b736 (diff) | |
download | go-10d6b36ca3f8d48a667742eee791dacbcfc888cd.tar.gz go-10d6b36ca3f8d48a667742eee791dacbcfc888cd.zip |
[dev.typeparams] cmd/compile/internal/types2: disallow ~T where T is a defined type or an interface
Change-Id: I35f6f43db00d56847da48320308f2fcfff924738
Reviewed-on: https://go-review.googlesource.com/c/go/+/324570
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Diffstat (limited to 'src/cmd/compile/internal/types2/testdata')
3 files changed, 13 insertions, 4 deletions
diff --git a/src/cmd/compile/internal/types2/testdata/check/typeinst2.go2 b/src/cmd/compile/internal/types2/testdata/check/typeinst2.go2 index 37745dfcba..14d8f0ea8c 100644 --- a/src/cmd/compile/internal/types2/testdata/check/typeinst2.go2 +++ b/src/cmd/compile/internal/types2/testdata/check/typeinst2.go2 @@ -176,12 +176,12 @@ type _ interface { // Interface type lists can contain any type, incl. *Named types. // Verify that we use the underlying type to compute the operational type. type MyInt int -func add1[T interface{~MyInt}](x T) T { +func add1[T interface{MyInt}](x T) T { return x + 1 } type MyString string -func double[T interface{~MyInt | ~MyString}](x T) T { +func double[T interface{MyInt|MyString}](x T) T { return x + x } diff --git a/src/cmd/compile/internal/types2/testdata/examples/constraints.go2 b/src/cmd/compile/internal/types2/testdata/examples/constraints.go2 index f6291ccf7d..efefaa2a25 100644 --- a/src/cmd/compile/internal/types2/testdata/examples/constraints.go2 +++ b/src/cmd/compile/internal/types2/testdata/examples/constraints.go2 @@ -24,6 +24,15 @@ type ( _ interface{int|interface /* ERROR cannot use interface */ {}} ) +type ( + // Tilde is not permitted on defined types or interfaces. + foo int + bar interface{} + _ interface{foo} + _ interface{~ /* ERROR invalid use of ~ */ foo } + _ interface{~ /* ERROR invalid use of ~ */ bar } +) + // Multiple embedded union elements are intersected. The order in which they // appear in the interface doesn't matter since intersection is a symmetric // operation. diff --git a/src/cmd/compile/internal/types2/testdata/fixedbugs/issue39634.go2 b/src/cmd/compile/internal/types2/testdata/fixedbugs/issue39634.go2 index 39ec5d7b30..6d002f5d2f 100644 --- a/src/cmd/compile/internal/types2/testdata/fixedbugs/issue39634.go2 +++ b/src/cmd/compile/internal/types2/testdata/fixedbugs/issue39634.go2 @@ -36,8 +36,8 @@ func bar8[A foo8[A]](a A) {} func main8() {} // crash 9 -type foo9[A any] interface { ~/* ERROR cannot use interface */ foo9[A] } -func _() { var _ = new(foo9 /* ERROR interface contains type constraints */ [int]) } +type foo9[A any] interface { foo9 /* ERROR illegal cycle */ [A] } +func _() { var _ = new(foo9 /* ERROR illegal cycle */ [int]) } // crash 12 var u /* ERROR cycle */ , i [func /* ERROR used as value */ /* ERROR used as value */ (u, c /* ERROR undeclared */ /* ERROR undeclared */ ) {}(0, len /* ERROR must be called */ /* ERROR must be called */ )]c /* ERROR undeclared */ /* ERROR undeclared */ |