1 // errorcheck 2 3 // Copyright 2009 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 // Verify that illegal uses of indirection are caught by the compiler. 8 // Does not compile. 9 10 package main 11 12 var m0 map[string]int 13 var m1 *map[string]int 14 var m2 *map[string]int = &m0 15 var m3 map[string]int = map[string]int{"a": 1} 16 var m4 *map[string]int = &m3 17 18 var s0 string 19 var s1 *string 20 var s2 *string = &s0 21 var s3 string = "a" 22 var s4 *string = &s3 23 24 var a0 [10]int 25 var a1 *[10]int 26 var a2 *[10]int = &a0 27 28 var b0 []int 29 var b1 *[]int 30 var b2 *[]int = &b0 31 var b3 []int = []int{1, 2, 3} 32 var b4 *[]int = &b3 33 34 func f() { 35 // this is spaced funny so that 36 // the compiler will print a different 37 // line number for each len call when 38 // it decides there are type errors. 39 x := 40 len(m0)+ 41 len(m1)+ // ERROR "illegal|invalid|must be" 42 len(m2)+ // ERROR "illegal|invalid|must be" 43 len(m3)+ 44 len(m4)+ // ERROR "illegal|invalid|must be" 45 46 len(s0)+ 47 len(s1)+ // ERROR "illegal|invalid|must be" 48 len(s2)+ // ERROR "illegal|invalid|must be" 49 len(s3)+ 50 len(s4)+ // ERROR "illegal|invalid|must be" 51 52 len(a0)+ 53 len(a1)+ 54 len(a2)+ 55 56 cap(a0)+ 57 cap(a1)+ 58 cap(a2)+ 59 60 len(b0)+ 61 len(b1)+ // ERROR "illegal|invalid|must be" 62 len(b2)+ // ERROR "illegal|invalid|must be" 63 len(b3)+ 64 len(b4)+ // ERROR "illegal|invalid|must be" 65 66 cap(b0)+ 67 cap(b1)+ // ERROR "illegal|invalid|must be" 68 cap(b2)+ // ERROR "illegal|invalid|must be" 69 cap(b3)+ 70 cap(b4) // ERROR "illegal|invalid|must be" 71 _ = x 72 } 73
