github.com/powerman/golang-tools@v0.1.11-0.20220410185822-5ad214d8d803/cmd/stringer/testdata/typeparams/conv2.go (about)

     1  // Copyright 2021 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // This is a version of ../conv.go with type params
     6  
     7  // Check that constants defined as a conversion are accepted.
     8  
     9  package main
    10  
    11  import "fmt"
    12  
    13  // For now, a lone type parameter is not permitted as RHS in a type declaration (issue #45639).
    14  // type Other[T interface{ ~int | ~uint }] T // Imagine this is in another package.
    15  type Other int
    16  
    17  const (
    18  	// alpha Other[int] = iota
    19  	alpha Other = iota
    20  	beta
    21  	gamma
    22  	delta
    23  )
    24  
    25  // type Conv2 Other[int]
    26  type Conv2 Other
    27  
    28  const (
    29  	Alpha = Conv2(alpha)
    30  	Beta  = Conv2(beta)
    31  	Gamma = Conv2(gamma)
    32  	Delta = Conv2(delta)
    33  )
    34  
    35  func main() {
    36  	ck(Alpha, "Alpha")
    37  	ck(Beta, "Beta")
    38  	ck(Gamma, "Gamma")
    39  	ck(Delta, "Delta")
    40  	ck(42, "Conv2(42)")
    41  }
    42  
    43  func ck(c Conv2, str string) {
    44  	if fmt.Sprint(c) != str {
    45  		panic("conv2.go: " + str)
    46  	}
    47  }