github.com/cockroachdb/tools@v0.0.0-20230222021103-a6d27438930d/go/callgraph/cha/testdata/issue23925.go (about)

     1  package main
     2  
     3  // Regression test for https://golang.org/issue/23925
     4  
     5  type stringFlagImpl string
     6  
     7  func (*stringFlagImpl) Set(s string) error { return nil }
     8  
     9  type boolFlagImpl bool
    10  
    11  func (*boolFlagImpl) Set(s string) error { return nil }
    12  func (*boolFlagImpl) extra()             {}
    13  
    14  // A copy of flag.boolFlag interface, without a dependency.
    15  // Must appear first, so that it becomes the owner of the Set methods.
    16  type boolFlag interface {
    17  	flagValue
    18  	extra()
    19  }
    20  
    21  // A copy of flag.Value, without adding a dependency.
    22  type flagValue interface {
    23  	Set(string) error
    24  }
    25  
    26  func main() {
    27  	var x flagValue = new(stringFlagImpl)
    28  	x.Set("")
    29  
    30  	var y boolFlag = new(boolFlagImpl)
    31  	y.Set("")
    32  }
    33  
    34  // WANT:
    35  // Dynamic calls
    36  //   main --> (*boolFlagImpl).Set
    37  //   main --> (*boolFlagImpl).Set
    38  //   main --> (*stringFlagImpl).Set