...
Run Format

Source file test/const4.go

Documentation: test

  // run
  
  // Copyright 2011 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.
  
  // Test len constants and non-constants, https://golang.org/issue/3244.
  
  package main
  
  var b struct {
  	a [10]int
  }
  
  var m map[string][20]int
  
  var s [][30]int
  
  const (
  	n1 = len(b.a)
  	n2 = len(m[""])
  	n3 = len(s[10])
  )
  
  // Non-constants (see also const5.go).
  var (
  	n4 = len(f())
  	n5 = len(<-c)
  	n6 = cap(g())
  	n7 = cap(<-c1)
  )
  
  var calledF = false
  
  func f() *[40]int {
  	calledF = true
  	return nil
  }
  
  var c = func() chan *[50]int {
  	c := make(chan *[50]int, 2)
  	c <- nil
  	c <- new([50]int)
  	return c
  }()
  
  var calledG = false
  
  func g() *[60]int {
  	calledG = true
  	return nil
  }
  
  var c1 = func() chan *[70]int {
  	c := make(chan *[70]int, 2)
  	c <- nil
  	c <- new([70]int)
  	return c
  }()
  
  func main() {
  	if n1 != 10 || n2 != 20 || n3 != 30 || n4 != 40 || n5 != 50 || n6 != 60 || n7 != 70 {
  		println("BUG:", n1, n2, n3, n4, n5, n6, n7)
  		panic("fail")
  	}
  	if !calledF {
  		println("BUG: did not call f")
  		panic("fail")
  	}
  	if <-c == nil {
  		println("BUG: did not receive from c")
  		panic("fail")
  	}
  	if !calledG {
  		println("BUG: did not call g")
  		panic("fail")
  	}
  	if <-c1 == nil {
  		println("BUG: did not receive from c1")
  		panic("fail")
  	}
  }
  

View as plain text