diff options
Diffstat (limited to 'src/internal/types/testdata/fixedbugs/issue43671.go')
-rw-r--r-- | src/internal/types/testdata/fixedbugs/issue43671.go | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/internal/types/testdata/fixedbugs/issue43671.go b/src/internal/types/testdata/fixedbugs/issue43671.go new file mode 100644 index 0000000..6879aec --- /dev/null +++ b/src/internal/types/testdata/fixedbugs/issue43671.go @@ -0,0 +1,58 @@ +// 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 C0 interface{ int } +type C1 interface{ chan int } +type C2 interface{ chan int | <-chan int } +type C3 interface{ chan int | chan float32 } +type C4 interface{ chan int | chan<- int } +type C5[T any] interface{ ~chan T | <-chan T } + +func _[T any](ch T) { + <-ch // ERROR cannot receive from ch .* \(no core type\) +} + +func _[T C0](ch T) { + <-ch // ERROR cannot receive from non-channel ch +} + +func _[T C1](ch T) { + <-ch +} + +func _[T C2](ch T) { + <-ch +} + +func _[T C3](ch T) { + <-ch // ERROR cannot receive from ch .* \(no core type\) +} + +func _[T C4](ch T) { + <-ch // ERROR cannot receive from send-only channel +} + +func _[T C5[X], X any](ch T, x X) { + x = <-ch +} + +// test case from issue, slightly modified +type RecvChan[T any] interface { + ~chan T | ~<-chan T +} + +func _[T any, C RecvChan[T]](ch C) T { + return <-ch +} + +func f[T any, C interface{ chan T }](ch C) T { + return <-ch +} + +func _(ch chan int) { + var x int = f(ch) // test constraint type inference for this case + _ = x +} |