github.com/xushiwei/go@v0.0.0-20130601165731-2b9d83f45bc9/test/fixedbugs/issue4545.go (about)

     1  // errorcheck
     2  
     3  // Copyright 2012 The Go Authors.  All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Issue 4545: untyped constants are incorrectly coerced
     8  // to concrete types when used in interface{} context.
     9  
    10  package main
    11  
    12  import "fmt"
    13  
    14  func main() {
    15  	var s uint
    16  	fmt.Println(1.0 + 1<<s) // ERROR "invalid operation"
    17  	x := 1.0 + 1<<s         // ERROR "invalid operation"
    18  	_ = x
    19  }