Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

Make regexp build and install officially

Browse source 
R=rsc
DELTA=335  (172 added, 156 deleted, 7 changed)
OCL=17167
CL=17180
This commit is contained in:
Rob Pike 2008-10-14 22:16:45 -07:00
parent 151c0de8bc
commit 84523402fc
6 changed files with 24 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

160
src/lib/regexp/main.go
View file

@ -1,160 +0,0 @@
// Copyright 2009 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.
package main
import (
"os";
"regexp";
)
var good_re = []string{
``,
`.`,
`^.$`,
`a`,
`a*`,
`a+`,
`a?`,
`a|b`,
`a*|b*`,
`(a*|b)(c*|d)`,
`[a-z]`,
`[a-abc-c\-\]\[]`,
`[a-z]+`,
`[]`,
`[abc]`,
`[^1234]`,
}
// TODO: nice to do this with a map but we don't have an iterator
type StringError struct {
re string;
err *os.Error;
}
var bad_re = []StringError{
StringError{ `*`, regexp.ErrBareClosure },
StringError{ `(abc`, regexp.ErrUnmatchedLpar },
StringError{ `abc)`, regexp.ErrUnmatchedRpar },
StringError{ `x[a-z`, regexp.ErrUnmatchedLbkt },
StringError{ `abc]`, regexp.ErrUnmatchedRbkt },
StringError{ `[z-a]`, regexp.ErrBadRange },
StringError{ `abc\`, regexp.ErrExtraneousBackslash },
StringError{ `a**`, regexp.ErrBadClosure },
StringError{ `a*+`, regexp.ErrBadClosure },
StringError{ `a??`, regexp.ErrBadClosure },
StringError{ `*`, regexp.ErrBareClosure },
StringError{ `\x`, regexp.ErrBadBackslash },
}
type Vec [20]int;
type Tester struct {
re string;
text string;
match Vec;
}
const END = -1000
var matches = []Tester {
Tester{ ``, "", Vec{0,0, END} },
Tester{ `a`, "a", Vec{0,1, END} },
Tester{ `b`, "abc", Vec{1,2, END} },
Tester{ `.`, "a", Vec{0,1, END} },
Tester{ `.*`, "abcdef", Vec{0,6, END} },
Tester{ `^abcd$`, "abcd", Vec{0,4, END} },
Tester{ `^bcd'`, "abcdef", Vec{END} },
Tester{ `^abcd$`, "abcde", Vec{END} },
Tester{ `a+`, "baaab", Vec{1,4, END} },
Tester{ `a*`, "baaab", Vec{0,0, END} },
Tester{ `[a-z]+`, "abcd", Vec{0,4, END} },
Tester{ `[^a-z]+`, "ab1234cd", Vec{2,6, END} },
Tester{ `[a\-\]z]+`, "az]-bcz", Vec{0,4, END} },
Tester{ `[日本語]+`, "日本語日本語", Vec{0,18, END} },
Tester{ `()`, "", Vec{0,0, 0,0, END} },
Tester{ `(a)`, "a", Vec{0,1, 0,1, END} },
Tester{ `(.)(.)`, "日a", Vec{0,4, 0,3, 3,4, END} },
Tester{ `(.*)`, "", Vec{0,0, 0,0, END} },
Tester{ `(.*)`, "abcd", Vec{0,4, 0,4, END} },
Tester{ `(..)(..)`, "abcd", Vec{0,4, 0,2, 2,4, END} },
Tester{ `(([^xyz]*)(d))`, "abcd", Vec{0,4, 0,4, 0,3, 3,4, END} },
Tester{ `((a|b|c)*(d))`, "abcd", Vec{0,4, 0,4, 2,3, 3,4, END} },
Tester{ `(((a|b|c)*)(d))`, "abcd", Vec{0,4, 0,4, 0,3, 2,3, 3,4, END} },
Tester{ `a*(|(b))c*`, "aacc", Vec{0,4, 2,2, -1,-1, END} },
}
func Compile(expr string, error *os.Error) regexp.Regexp {
re, err := regexp.Compile(expr);
if err != error {
print("compiling `", expr, "`; unexpected error: ", err.String(), "\n");
sys.exit(1);
}
return re
}
func MarkedLen(m *[] int) int {
if m == nil {
return 0
}
var i int;
for i = 0; i < len(m) && m[i] != END; i = i+2 {
}
return i
}
func PrintVec(m *[] int) {
l := MarkedLen(m);
if l == 0 {
print("<no match>");
} else {
for i := 0; i < l && m[i] != END; i = i+2 {
print(m[i], ",", m[i+1], " ")
}
}
}
func Equal(m1, m2 *[]int) bool {
l := MarkedLen(m1);
if l != MarkedLen(m2) {
return false
}
for i := 0; i < l; i++ {
if m1[i] != m2[i] {
return false
}
}
return true
}
func Match(expr string, str string, match *[]int) {
re := Compile(expr, nil);
m := re.Execute(str);
if !Equal(m, match) {
print("failure on `", expr, "` matching `", str, "`:\n");
PrintVec(m);
print("\nshould be:\n");
PrintVec(match);
print("\n");
sys.exit(1);
}
}
func main() {
//regexp.debug = true;
if sys.argc() > 1 {
Compile(sys.argv(1), nil);
sys.exit(0);
}
for i := 0; i < len(good_re); i++ {
Compile(good_re[i], nil);
}
for i := 0; i < len(bad_re); i++ {
Compile(bad_re[i].re, bad_re[i].err)
}
for i := 0; i < len(matches); i++ {
t := &matches[i];
Match(t.re, t.text, &t.match)
}
}