1 // Copyright 2013 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 package types_test 6 7 import ( 8 "go/parser" 9 "testing" 10 11 . "go/types" 12 ) 13 14 var testExprs = []testEntry{ 15 // basic type literals 16 dup("x"), 17 dup("true"), 18 dup("42"), 19 dup("3.1415"), 20 dup("2.71828i"), 21 dup(`'a'`), 22 dup(`"foo"`), 23 dup("`bar`"), 24 25 // func and composite literals 26 {"func(){}", "(func() literal)"}, 27 {"func(x int) complex128 {}", "(func(x int) complex128 literal)"}, 28 {"[]int{1, 2, 3}", "([]int literal)"}, 29 30 // non-type expressions 31 dup("(x)"), 32 dup("x.f"), 33 dup("a[i]"), 34 35 dup("s[:]"), 36 dup("s[i:]"), 37 dup("s[:j]"), 38 dup("s[i:j]"), 39 dup("s[:j:k]"), 40 dup("s[i:j:k]"), 41 42 dup("x.(T)"), 43 44 dup("x.([10]int)"), 45 dup("x.([...]int)"), 46 47 dup("x.(struct{})"), 48 dup("x.(struct{x int; y, z float32; E})"), 49 50 dup("x.(func())"), 51 dup("x.(func(x int))"), 52 dup("x.(func() int)"), 53 dup("x.(func(x, y int, z float32) (r int))"), 54 dup("x.(func(a, b, c int))"), 55 dup("x.(func(x ...T))"), 56 57 dup("x.(interface{})"), 58 dup("x.(interface{m(); n(x int); E})"), 59 dup("x.(interface{m(); n(x int) T; E; F})"), 60 61 dup("x.(map[K]V)"), 62 63 dup("x.(chan E)"), 64 dup("x.(<-chan E)"), 65 dup("x.(chan<- chan int)"), 66 dup("x.(chan<- <-chan int)"), 67 dup("x.(<-chan chan int)"), 68 dup("x.(chan (<-chan int))"), 69 70 dup("f()"), 71 dup("f(x)"), 72 dup("int(x)"), 73 dup("f(x, x + y)"), 74 dup("f(s...)"), 75 dup("f(a, s...)"), 76 77 dup("*x"), 78 dup("&x"), 79 dup("x + y"), 80 dup("x + y << (2 * s)"), 81 } 82 83 func TestExprString(t *testing.T) { 84 for _, test := range testExprs { 85 x, err := parser.ParseExpr(test.src) 86 if err != nil { 87 t.Errorf("%s: %s", test.src, err) 88 continue 89 } 90 if got := ExprString(x); got != test.str { 91 t.Errorf("%s: got %s, want %s", test.src, got, test.str) 92 } 93 } 94 } 95
