gcc/testsuite/go.test/test/string_lit.go

   1 // run
   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 // Test string literal syntax.
   8
   9 package main
  10
  11 import "os"
  12
  13 var ecode int
  14
  15 func assert(a, b, c string) {
  16         if a != b {
  17                 ecode = 1
  18                 print("FAIL: ", c, ": ", a, "!=", b, "\n")
  19                 var max int = len(a)
  20                 if len(b) > max {
  21                         max = len(b)
  22                 }
  23                 for i := 0; i < max; i++ {
  24                         ac := 0
  25                         bc := 0
  26                         if i < len(a) {
  27                                 ac = int(a[i])
  28                         }
  29                         if i < len(b) {
  30                                 bc = int(b[i])
  31                         }
  32                         if ac != bc {
  33                                 print("\ta[", i, "] = ", ac, "; b[", i, "] =", bc, "\n")
  34                         }
  35                 }
  36                 panic("string_lit")
  37         }
  38 }
  39
  40 const (
  41         gx1    = "aä本☺"
  42         gx2    = "aä\xFF\xFF本☺"
  43         gx2fix = "aä\uFFFD\uFFFD本☺"
  44 )
  45
  46 var (
  47         gr1 = []rune(gx1)
  48         gr2 = []rune(gx2)
  49         gb1 = []byte(gx1)
  50         gb2 = []byte(gx2)
  51 )
  52
  53 func main() {
  54         ecode = 0
  55         s :=
  56                 "" +
  57                         " " +
  58                         "'`" +
  59                         "a" +
  60                         "ä" +
  61                         "本" +
  62                         "\a\b\f\n\r\t\v\\\"" +
  63                         "\000\123\x00\xca\xFE\u0123\ubabe\U0000babe" +
  64
  65                         `` +
  66                         ` ` +
  67                         `'"` +
  68                         `a` +
  69                         `ä` +
  70                         `本` +
  71                         `\a\b\f\n\r\t\v\\\'` +
  72                         `\000\123\x00\xca\xFE\u0123\ubabe\U0000babe` +
  73                         `\x\u\U\`
  74
  75         assert("", ``, "empty")
  76         assert(" ", " ", "blank")
  77         assert("\x61", "a", "lowercase a")
  78         assert("\x61", `a`, "lowercase a (backquote)")
  79         assert("\u00e4", "ä", "a umlaut")
  80         assert("\u00e4", `ä`, "a umlaut (backquote)")
  81         assert("\u672c", "本", "nihon")
  82         assert("\u672c", `本`, "nihon (backquote)")
  83         assert("\x07\x08\x0c\x0a\x0d\x09\x0b\x5c\x22",
  84                 "\a\b\f\n\r\t\v\\\"",
  85                 "backslashes")
  86         assert("\\a\\b\\f\\n\\r\\t\\v\\\\\\\"",
  87                 `\a\b\f\n\r\t\v\\\"`,
  88                 "backslashes (backquote)")
  89         assert("\x00\x53\000\xca\376S몾몾",
  90                 "\000\123\x00\312\xFE\u0053\ubabe\U0000babe",
  91                 "backslashes 2")
  92         assert("\\000\\123\\x00\\312\\xFE\\u0123\\ubabe\\U0000babe",
  93                 `\000\123\x00\312\xFE\u0123\ubabe\U0000babe`,
  94                 "backslashes 2 (backquote)")
  95         assert("\\x\\u\\U\\", `\x\u\U\`, "backslash 3 (backquote)")
  96
  97         // test large and surrogate-half runes. perhaps not the most logical place for these tests.
  98         var r int32
  99         r = 0x10ffff // largest rune value
 100         s = string(r)
 101         assert(s, "\xf4\x8f\xbf\xbf", "largest rune")
 102         r = 0x10ffff + 1
 103         s = string(r)
 104         assert(s, "\xef\xbf\xbd", "too-large rune")
 105         r = 0xD800
 106         s = string(r)
 107         assert(s, "\xef\xbf\xbd", "surrogate rune min")
 108         r = 0xDFFF
 109         s = string(r)
 110         assert(s, "\xef\xbf\xbd", "surrogate rune max")
 111         r = -1
 112         s = string(r)
 113         assert(s, "\xef\xbf\xbd", "negative rune")
 114
 115         // the large rune tests again, this time using constants instead of a variable.
 116         // these conversions will be done at compile time.
 117         s = string(0x10ffff) // largest rune value
 118         assert(s, "\xf4\x8f\xbf\xbf", "largest rune constant")
 119         s = string(0x10ffff + 1)
 120         assert(s, "\xef\xbf\xbd", "too-large rune constant")
 121         s = string(0xD800)
 122         assert(s, "\xef\xbf\xbd", "surrogate rune min constant")
 123         s = string(0xDFFF)
 124         assert(s, "\xef\xbf\xbd", "surrogate rune max constant")
 125         s = string(-1)
 126         assert(s, "\xef\xbf\xbd", "negative rune")
 127
 128         // the large rune tests yet again, with a slice.
 129         rs := []rune{0x10ffff, 0x10ffff + 1, 0xD800, 0xDFFF, -1}
 130         s = string(rs)
 131         assert(s, "\xf4\x8f\xbf\xbf\xef\xbf\xbd\xef\xbf\xbd\xef\xbf\xbd\xef\xbf\xbd", "large rune slice")
 132
 133         assert(string(gr1), gx1, "global ->[]rune")
 134         assert(string(gr2), gx2fix, "global invalid ->[]rune")
 135         assert(string(gb1), gx1, "->[]byte")
 136         assert(string(gb2), gx2, "global invalid ->[]byte")
 137
 138         var (
 139                 r1 = []rune(gx1)
 140                 r2 = []rune(gx2)
 141                 b1 = []byte(gx1)
 142                 b2 = []byte(gx2)
 143         )
 144         assert(string(r1), gx1, "->[]rune")
 145         assert(string(r2), gx2fix, "invalid ->[]rune")
 146         assert(string(b1), gx1, "->[]byte")
 147         assert(string(b2), gx2, "invalid ->[]byte")
 148
 149         os.Exit(ecode)
 150 }