go issue39755 源码
golang issue39755 代码
文件路径：/test/typeparam/issue39755.go
// compile
// Copyright 2020 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.
// copied from cmd/compile/internal/types2/testdata/fixedbugs/issue39755.go
package p
func _[T interface{ ~map[string]int }](x T) {
_ = x == nil
}
// simplified test case from issue
type PathParamsConstraint interface {
~map[string]string | ~[]struct{ key, value string }
}
type PathParams[T PathParamsConstraint] struct {
t T
}
func (pp *PathParams[T]) IsNil() bool {
return pp.t == nil // this must succeed
}
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