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38729cff96
For #50646. Change-Id: I7420545556e0df2659836364a62ce2c32ad7a8b1 Reviewed-on: https://go-review.googlesource.com/c/go/+/380654 Trust: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com>
40 lines
711 B
Go
40 lines
711 B
Go
// run -gcflags=-G=3
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// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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func eql[P comparable](x, y P) {
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if x != y {
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panic("not equal")
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}
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}
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func expectPanic(f func()) {
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defer func() {
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if recover() == nil {
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panic("function succeeded unexpectedly")
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}
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}()
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f()
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}
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func main() {
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eql[int](1, 1)
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eql(1, 1)
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// all interfaces implement comparable
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var x, y any = 2, 2
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eql[any](x, y)
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eql(x, y)
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// but we may get runtime panics
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x, y = 1, 2 // x != y
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expectPanic(func() { eql(x, y) })
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x, y = main, main // functions are not comparable
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expectPanic(func() { eql(x, y) })
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}
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