mirror of
https://github.com/golang/go
synced 2024-11-19 02:04:42 -07:00
testing: eliminate testing/regexp
Rather than updating the stripped-down regexp implementation embedded in testing, delete it by passing the one function we need from the package main file created by gotest. R=rsc CC=golang-dev https://golang.org/cl/2761043
This commit is contained in:
Rob Pike
parent
1f4d54ea01
commit
4e9cc085d2
@ -147,6 +147,7 @@ importpath=$(gomake -s importpath)
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echo 'import "./_xtest_"'
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fi
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echo 'import "testing"'
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echo 'import __regexp__ "regexp"' # rename in case tested package is called regexp
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# test array
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echo
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echo 'var tests = []testing.Test{'
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@ -166,8 +167,8 @@ importpath=$(gomake -s importpath)
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# body
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echo
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echo 'func main() {'
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echo ' testing.Main(tests)'
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echo ' testing.RunBenchmarks(benchmarks)'
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echo ' testing.Main(__regexp__.MatchString, tests)'
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echo ' testing.RunBenchmarks(__regexp__.MatchString, benchmarks)'
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echo '}'
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}>_testmain.go
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@ -151,6 +151,7 @@ NOTEST=\
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rand\
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runtime/pprof\
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syscall\
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testing\
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testing/iotest\
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try\
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../libcgo\
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@ -11,6 +11,7 @@ import (
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"log"
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"os"
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"reflect"
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"regexp"
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"testing"
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)
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@ -89,9 +90,9 @@ func (a test) run(t *testing.T, name string) {
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}
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func match(t *testing.T, err os.Error, pat string) bool {
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ok, errstr := testing.MatchString(pat, err.String())
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if errstr != "" {
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t.Fatalf("compile regexp %s: %v", pat, errstr)
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ok, err1 := regexp.MatchString(pat, err.String())
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if err1 != nil {
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t.Fatalf("compile regexp %s: %v", pat, err1)
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}
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return ok
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}
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@ -10,6 +10,7 @@ import (
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"io"
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"os"
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"reflect"
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"regexp"
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"strings"
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"testing"
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"utf8"
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@ -101,7 +102,7 @@ func (x *Xs) Scan(state ScanState, verb int) os.Error {
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if err != nil {
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return err
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}
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if !testing.MustCompile("^" + string(verb) + "+$").MatchString(tok) {
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if !regexp.MustCompile("^" + string(verb) + "+$").MatchString(tok) {
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return os.ErrorString("syntax error for xs")
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}
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*x = Xs(tok)
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@ -385,7 +386,7 @@ func TestScanf(t *testing.T) {
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func TestScanOverflow(t *testing.T) {
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// different machines and different types report errors with different strings.
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re := testing.MustCompile("overflow|too large|out of range|not representable")
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re := regexp.MustCompile("overflow|too large|out of range|not representable")
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for _, test := range overflowTests {
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_, err := Sscan(test.text, test.in)
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if err == nil {
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@ -23,7 +23,7 @@ func TestTempFile(t *testing.T) {
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t.Errorf("TempFile(dir, `ioutil_test`) = %v, %v", f, err)
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}
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if f != nil {
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re := testing.MustCompile("^" + regexp.QuoteMeta(dir) + "/ioutil_test[0-9]+$")
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re := regexp.MustCompile("^" + regexp.QuoteMeta(dir) + "/ioutil_test[0-9]+$")
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if !re.MatchString(f.Name()) {
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t.Errorf("TempFile(`"+dir+"`, `ioutil_test`) created bad name %s", f.Name())
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}
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@ -7,7 +7,6 @@ include ../../Make.inc
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TARG=testing
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GOFILES=\
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benchmark.go\
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regexp.go\
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testing.go\
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include ../../Make.pkg
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@ -148,18 +148,18 @@ func (b *B) run() {
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// An internal function but exported because it is cross-package; part of the implementation
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// of gotest.
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func RunBenchmarks(benchmarks []Benchmark) {
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func RunBenchmarks(matchString func(pat, str string) (bool, os.Error), benchmarks []Benchmark) {
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// If no flag was specified, don't run benchmarks.
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if len(*matchBenchmarks) == 0 {
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return
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}
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re, err := CompileRegexp(*matchBenchmarks)
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if err != "" {
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println("invalid regexp for -benchmarks:", err)
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os.Exit(1)
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}
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for _, Benchmark := range benchmarks {
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if !re.MatchString(Benchmark.Name) {
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matched, err := matchString(*matchBenchmarks, Benchmark.Name)
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if err != nil {
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println("invalid regexp for -benchmarks:", err)
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os.Exit(1)
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}
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if !matched {
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continue
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}
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b := &B{benchmark: Benchmark}
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@ -1,751 +0,0 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// The testing package implements a simple regular expression library.
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// It is a reduced version of the regular expression package suitable
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// for use in tests; it avoids many dependencies.
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//
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// The syntax of the regular expressions accepted is:
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//
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// regexp:
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// concatenation { '|' concatenation }
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// concatenation:
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// { closure }
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// closure:
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// term [ '*' | '+' | '?' ]
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// term:
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// '^'
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// '$'
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// '.'
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// character
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// '[' [ '^' ] character-ranges ']'
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// '(' regexp ')'
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//
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package testing
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import (
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"utf8"
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)
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var debug = false
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// Error codes returned by failures to parse an expression.
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var (
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ErrInternal = "internal error"
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ErrUnmatchedLpar = "unmatched '('"
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ErrUnmatchedRpar = "unmatched ')'"
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ErrUnmatchedLbkt = "unmatched '['"
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ErrUnmatchedRbkt = "unmatched ']'"
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ErrBadRange = "bad range in character class"
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ErrExtraneousBackslash = "extraneous backslash"
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ErrBadClosure = "repeated closure (**, ++, etc.)"
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ErrBareClosure = "closure applies to nothing"
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ErrBadBackslash = "illegal backslash escape"
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)
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// An instruction executed by the NFA
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type instr interface {
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kind() int // the type of this instruction: _CHAR, _ANY, etc.
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next() instr // the instruction to execute after this one
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setNext(i instr)
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index() int
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setIndex(i int)
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print()
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}
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// Fields and methods common to all instructions
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type common struct {
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_next instr
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_index int
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}
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func (c *common) next() instr { return c._next }
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func (c *common) setNext(i instr) { c._next = i }
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func (c *common) index() int { return c._index }
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func (c *common) setIndex(i int) { c._index = i }
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// The representation of a compiled regular expression.
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// The public interface is entirely through methods.
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type Regexp struct {
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expr string // the original expression
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inst []instr
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start instr
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nbra int // number of brackets in expression, for subexpressions
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}
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const (
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_START = iota // beginning of program
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_END // end of program: success
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_BOT // '^' beginning of text
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_EOT // '$' end of text
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_CHAR // 'a' regular character
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_CHARCLASS // [a-z] character class
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_ANY // '.' any character including newline
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_NOTNL // [^\n] special case: any character but newline
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_BRA // '(' parenthesized expression
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_EBRA // ')'; end of '(' parenthesized expression
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_ALT // '|' alternation
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_NOP // do nothing; makes it easy to link without patching
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)
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// --- START start of program
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type _Start struct {
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common
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}
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func (start *_Start) kind() int { return _START }
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func (start *_Start) print() { print("start") }
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// --- END end of program
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type _End struct {
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common
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}
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func (end *_End) kind() int { return _END }
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func (end *_End) print() { print("end") }
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// --- BOT beginning of text
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type _Bot struct {
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common
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}
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func (bot *_Bot) kind() int { return _BOT }
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func (bot *_Bot) print() { print("bot") }
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// --- EOT end of text
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type _Eot struct {
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common
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}
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func (eot *_Eot) kind() int { return _EOT }
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func (eot *_Eot) print() { print("eot") }
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// --- CHAR a regular character
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type _Char struct {
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common
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char int
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}
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func (char *_Char) kind() int { return _CHAR }
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func (char *_Char) print() { print("char ", string(char.char)) }
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func newChar(char int) *_Char {
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c := new(_Char)
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c.char = char
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return c
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}
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// --- CHARCLASS [a-z]
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type _CharClass struct {
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common
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char int
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negate bool // is character class negated? ([^a-z])
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// stored pairwise: [a-z] is (a,z); x is (x,x):
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ranges []int
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}
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func (cclass *_CharClass) kind() int { return _CHARCLASS }
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func (cclass *_CharClass) print() {
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print("charclass")
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if cclass.negate {
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print(" (negated)")
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}
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for i := 0; i < len(cclass.ranges); i += 2 {
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l := cclass.ranges[i]
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r := cclass.ranges[i+1]
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if l == r {
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print(" [", string(l), "]")
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} else {
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print(" [", string(l), "-", string(r), "]")
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}
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}
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}
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func (cclass *_CharClass) addRange(a, b int) {
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// range is a through b inclusive
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cclass.ranges = append(cclass.ranges, a, b)
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}
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func (cclass *_CharClass) matches(c int) bool {
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for i := 0; i < len(cclass.ranges); i = i + 2 {
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min := cclass.ranges[i]
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max := cclass.ranges[i+1]
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if min <= c && c <= max {
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return !cclass.negate
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}
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}
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return cclass.negate
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}
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func newCharClass() *_CharClass {
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c := new(_CharClass)
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c.ranges = make([]int, 0, 20)
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return c
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}
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// --- ANY any character
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type _Any struct {
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common
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}
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func (any *_Any) kind() int { return _ANY }
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func (any *_Any) print() { print("any") }
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// --- NOTNL any character but newline
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type _NotNl struct {
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common
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}
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func (notnl *_NotNl) kind() int { return _NOTNL }
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func (notnl *_NotNl) print() { print("notnl") }
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// --- BRA parenthesized expression
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type _Bra struct {
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common
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n int // subexpression number
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}
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func (bra *_Bra) kind() int { return _BRA }
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func (bra *_Bra) print() { print("bra", bra.n) }
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// --- EBRA end of parenthesized expression
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type _Ebra struct {
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common
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n int // subexpression number
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}
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func (ebra *_Ebra) kind() int { return _EBRA }
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func (ebra *_Ebra) print() { print("ebra ", ebra.n) }
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// --- ALT alternation
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type _Alt struct {
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common
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left instr // other branch
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}
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func (alt *_Alt) kind() int { return _ALT }
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func (alt *_Alt) print() { print("alt(", alt.left.index(), ")") }
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// --- NOP no operation
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type _Nop struct {
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common
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}
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func (nop *_Nop) kind() int { return _NOP }
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func (nop *_Nop) print() { print("nop") }
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func (re *Regexp) add(i instr) instr {
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i.setIndex(len(re.inst))
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re.inst = append(re.inst, i)
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return i
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}
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type parser struct {
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re *Regexp
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nlpar int // number of unclosed lpars
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pos int
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ch int
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}
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func (p *parser) error(err string) {
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panic(err)
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}
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const endOfFile = -1
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func (p *parser) c() int { return p.ch }
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func (p *parser) nextc() int {
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if p.pos >= len(p.re.expr) {
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p.ch = endOfFile
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} else {
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c, w := utf8.DecodeRuneInString(p.re.expr[p.pos:])
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p.ch = c
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p.pos += w
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}
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return p.ch
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}
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func newParser(re *Regexp) *parser {
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p := new(parser)
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p.re = re
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p.nextc() // load p.ch
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return p
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}
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func special(c int) bool {
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s := `\.+*?()|[]^$`
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for i := 0; i < len(s); i++ {
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if c == int(s[i]) {
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return true
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}
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}
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return false
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}
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func specialcclass(c int) bool {
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s := `\-[]`
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for i := 0; i < len(s); i++ {
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if c == int(s[i]) {
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return true
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}
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}
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return false
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}
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func (p *parser) charClass() instr {
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cc := newCharClass()
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if p.c() == '^' {
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cc.negate = true
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p.nextc()
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}
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left := -1
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for {
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switch c := p.c(); c {
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case ']', endOfFile:
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if left >= 0 {
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p.error(ErrBadRange)
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}
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// Is it [^\n]?
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if cc.negate && len(cc.ranges) == 2 &&
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cc.ranges[0] == '\n' && cc.ranges[1] == '\n' {
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nl := new(_NotNl)
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p.re.add(nl)
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return nl
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}
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p.re.add(cc)
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return cc
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case '-': // do this before backslash processing
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p.error(ErrBadRange)
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case '\\':
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c = p.nextc()
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switch {
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case c == endOfFile:
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p.error(ErrExtraneousBackslash)
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case c == 'n':
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c = '\n'
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case specialcclass(c):
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// c is as delivered
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default:
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p.error(ErrBadBackslash)
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}
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fallthrough
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default:
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p.nextc()
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switch {
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case left < 0: // first of pair
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if p.c() == '-' { // range
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p.nextc()
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left = c
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} else { // single char
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cc.addRange(c, c)
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}
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case left <= c: // second of pair
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cc.addRange(left, c)
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left = -1
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default:
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p.error(ErrBadRange)
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}
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}
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}
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return nil
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}
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func (p *parser) term() (start, end instr) {
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switch c := p.c(); c {
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case '|', endOfFile:
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return nil, nil
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case '*', '+':
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p.error(ErrBareClosure)
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return
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case ')':
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if p.nlpar == 0 {
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p.error(ErrUnmatchedRpar)
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}
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return nil, nil
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case ']':
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p.error(ErrUnmatchedRbkt)
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case '^':
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p.nextc()
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start = p.re.add(new(_Bot))
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return start, start
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case '$':
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p.nextc()
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start = p.re.add(new(_Eot))
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return start, start
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case '.':
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p.nextc()
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start = p.re.add(new(_Any))
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return start, start
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case '[':
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p.nextc()
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start = p.charClass()
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if p.c() != ']' {
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p.error(ErrUnmatchedLbkt)
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}
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p.nextc()
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return start, start
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case '(':
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p.nextc()
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p.nlpar++
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p.re.nbra++ // increment first so first subexpr is \1
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nbra := p.re.nbra
|
||||
start, end = p.regexp()
|
||||
if p.c() != ')' {
|
||||
p.error(ErrUnmatchedLpar)
|
||||
}
|
||||
p.nlpar--
|
||||
p.nextc()
|
||||
bra := new(_Bra)
|
||||
p.re.add(bra)
|
||||
ebra := new(_Ebra)
|
||||
p.re.add(ebra)
|
||||
bra.n = nbra
|
||||
ebra.n = nbra
|
||||
if start == nil {
|
||||
if end == nil {
|
||||
p.error(ErrInternal)
|
||||
}
|
||||
start = ebra
|
||||
} else {
|
||||
end.setNext(ebra)
|
||||
}
|
||||
bra.setNext(start)
|
||||
return bra, ebra
|
||||
case '\\':
|
||||
c = p.nextc()
|
||||
switch {
|
||||
case c == endOfFile:
|
||||
p.error(ErrExtraneousBackslash)
|
||||
return
|
||||
case c == 'n':
|
||||
c = '\n'
|
||||
case special(c):
|
||||
// c is as delivered
|
||||
default:
|
||||
p.error(ErrBadBackslash)
|
||||
}
|
||||
fallthrough
|
||||
default:
|
||||
p.nextc()
|
||||
start = newChar(c)
|
||||
p.re.add(start)
|
||||
return start, start
|
||||
}
|
||||
panic("unreachable")
|
||||
}
|
||||
|
||||
func (p *parser) closure() (start, end instr) {
|
||||
start, end = p.term()
|
||||
if start == nil {
|
||||
return
|
||||
}
|
||||
switch p.c() {
|
||||
case '*':
|
||||
// (start,end)*:
|
||||
alt := new(_Alt)
|
||||
p.re.add(alt)
|
||||
end.setNext(alt) // after end, do alt
|
||||
alt.left = start // alternate brach: return to start
|
||||
start = alt // alt becomes new (start, end)
|
||||
end = alt
|
||||
case '+':
|
||||
// (start,end)+:
|
||||
alt := new(_Alt)
|
||||
p.re.add(alt)
|
||||
end.setNext(alt) // after end, do alt
|
||||
alt.left = start // alternate brach: return to start
|
||||
end = alt // start is unchanged; end is alt
|
||||
case '?':
|
||||
// (start,end)?:
|
||||
alt := new(_Alt)
|
||||
p.re.add(alt)
|
||||
nop := new(_Nop)
|
||||
p.re.add(nop)
|
||||
alt.left = start // alternate branch is start
|
||||
alt.setNext(nop) // follow on to nop
|
||||
end.setNext(nop) // after end, go to nop
|
||||
start = alt // start is now alt
|
||||
end = nop // end is nop pointed to by both branches
|
||||
default:
|
||||
return
|
||||
}
|
||||
switch p.nextc() {
|
||||
case '*', '+', '?':
|
||||
p.error(ErrBadClosure)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func (p *parser) concatenation() (start, end instr) {
|
||||
for {
|
||||
nstart, nend := p.closure()
|
||||
switch {
|
||||
case nstart == nil: // end of this concatenation
|
||||
if start == nil { // this is the empty string
|
||||
nop := p.re.add(new(_Nop))
|
||||
return nop, nop
|
||||
}
|
||||
return
|
||||
case start == nil: // this is first element of concatenation
|
||||
start, end = nstart, nend
|
||||
default:
|
||||
end.setNext(nstart)
|
||||
end = nend
|
||||
}
|
||||
}
|
||||
panic("unreachable")
|
||||
}
|
||||
|
||||
func (p *parser) regexp() (start, end instr) {
|
||||
start, end = p.concatenation()
|
||||
for {
|
||||
switch p.c() {
|
||||
default:
|
||||
return
|
||||
case '|':
|
||||
p.nextc()
|
||||
nstart, nend := p.concatenation()
|
||||
alt := new(_Alt)
|
||||
p.re.add(alt)
|
||||
alt.left = start
|
||||
alt.setNext(nstart)
|
||||
nop := new(_Nop)
|
||||
p.re.add(nop)
|
||||
end.setNext(nop)
|
||||
nend.setNext(nop)
|
||||
start, end = alt, nop
|
||||
}
|
||||
}
|
||||
panic("unreachable")
|
||||
}
|
||||
|
||||
func unNop(i instr) instr {
|
||||
for i.kind() == _NOP {
|
||||
i = i.next()
|
||||
}
|
||||
return i
|
||||
}
|
||||
|
||||
func (re *Regexp) eliminateNops() {
|
||||
for i := 0; i < len(re.inst); i++ {
|
||||
inst := re.inst[i]
|
||||
if inst.kind() == _END {
|
||||
continue
|
||||
}
|
||||
inst.setNext(unNop(inst.next()))
|
||||
if inst.kind() == _ALT {
|
||||
alt := inst.(*_Alt)
|
||||
alt.left = unNop(alt.left)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (re *Regexp) doParse() {
|
||||
p := newParser(re)
|
||||
start := new(_Start)
|
||||
re.add(start)
|
||||
s, e := p.regexp()
|
||||
start.setNext(s)
|
||||
re.start = start
|
||||
e.setNext(re.add(new(_End)))
|
||||
re.eliminateNops()
|
||||
}
|
||||
|
||||
// CompileRegexp parses a regular expression and returns, if successful, a Regexp
|
||||
// object that can be used to match against text.
|
||||
func CompileRegexp(str string) (regexp *Regexp, error string) {
|
||||
regexp = new(Regexp)
|
||||
// doParse will panic if there is a parse error.
|
||||
defer func() {
|
||||
if e := recover(); e != nil {
|
||||
regexp = nil
|
||||
error = e.(string) // Will re-panic if error was not a string, e.g. nil-pointer exception
|
||||
}
|
||||
}()
|
||||
regexp.expr = str
|
||||
regexp.inst = make([]instr, 0, 20)
|
||||
regexp.doParse()
|
||||
return
|
||||
}
|
||||
|
||||
// MustCompileRegexp is like CompileRegexp but panics if the expression cannot be parsed.
|
||||
// It simplifies safe initialization of global variables holding compiled regular
|
||||
// expressions.
|
||||
func MustCompile(str string) *Regexp {
|
||||
regexp, error := CompileRegexp(str)
|
||||
if error != "" {
|
||||
panic(`regexp: compiling "` + str + `": ` + error)
|
||||
}
|
||||
return regexp
|
||||
}
|
||||
|
||||
type state struct {
|
||||
inst instr // next instruction to execute
|
||||
match []int // pairs of bracketing submatches. 0th is start,end
|
||||
}
|
||||
|
||||
// Append new state to to-do list. Leftmost-longest wins so avoid
|
||||
// adding a state that's already active.
|
||||
func addState(s []state, inst instr, match []int) []state {
|
||||
index := inst.index()
|
||||
l := len(s)
|
||||
pos := match[0]
|
||||
// TODO: Once the state is a vector and we can do insert, have inputs always
|
||||
// go in order correctly and this "earlier" test is never necessary,
|
||||
for i := 0; i < l; i++ {
|
||||
if s[i].inst.index() == index && // same instruction
|
||||
s[i].match[0] < pos { // earlier match already going; lefmost wins
|
||||
return s
|
||||
}
|
||||
}
|
||||
if l == cap(s) {
|
||||
s1 := make([]state, 2*l)[0:l]
|
||||
for i := 0; i < l; i++ {
|
||||
s1[i] = s[i]
|
||||
}
|
||||
s = s1
|
||||
}
|
||||
s = s[0 : l+1]
|
||||
s[l].inst = inst
|
||||
s[l].match = match
|
||||
return s
|
||||
}
|
||||
|
||||
// Accepts either string or bytes - the logic is identical either way.
|
||||
// If bytes == nil, scan str.
|
||||
func (re *Regexp) doExecute(str string, bytes []byte, pos int) []int {
|
||||
var s [2][]state // TODO: use a vector when state values (not ptrs) can be vector elements
|
||||
s[0] = make([]state, 10)[0:0]
|
||||
s[1] = make([]state, 10)[0:0]
|
||||
in, out := 0, 1
|
||||
var final state
|
||||
found := false
|
||||
end := len(str)
|
||||
if bytes != nil {
|
||||
end = len(bytes)
|
||||
}
|
||||
for pos <= end {
|
||||
if !found {
|
||||
// prime the pump if we haven't seen a match yet
|
||||
match := make([]int, 2*(re.nbra+1))
|
||||
for i := 0; i < len(match); i++ {
|
||||
match[i] = -1 // no match seen; catches cases like "a(b)?c" on "ac"
|
||||
}
|
||||
match[0] = pos
|
||||
s[out] = addState(s[out], re.start.next(), match)
|
||||
}
|
||||
in, out = out, in // old out state is new in state
|
||||
s[out] = s[out][0:0] // clear out state
|
||||
if len(s[in]) == 0 {
|
||||
// machine has completed
|
||||
break
|
||||
}
|
||||
charwidth := 1
|
||||
c := endOfFile
|
||||
if pos < end {
|
||||
if bytes == nil {
|
||||
c, charwidth = utf8.DecodeRuneInString(str[pos:end])
|
||||
} else {
|
||||
c, charwidth = utf8.DecodeRune(bytes[pos:end])
|
||||
}
|
||||
}
|
||||
for i := 0; i < len(s[in]); i++ {
|
||||
st := s[in][i]
|
||||
switch s[in][i].inst.kind() {
|
||||
case _BOT:
|
||||
if pos == 0 {
|
||||
s[in] = addState(s[in], st.inst.next(), st.match)
|
||||
}
|
||||
case _EOT:
|
||||
if pos == end {
|
||||
s[in] = addState(s[in], st.inst.next(), st.match)
|
||||
}
|
||||
case _CHAR:
|
||||
if c == st.inst.(*_Char).char {
|
||||
s[out] = addState(s[out], st.inst.next(), st.match)
|
||||
}
|
||||
case _CHARCLASS:
|
||||
if st.inst.(*_CharClass).matches(c) {
|
||||
s[out] = addState(s[out], st.inst.next(), st.match)
|
||||
}
|
||||
case _ANY:
|
||||
if c != endOfFile {
|
||||
s[out] = addState(s[out], st.inst.next(), st.match)
|
||||
}
|
||||
case _NOTNL:
|
||||
if c != endOfFile && c != '\n' {
|
||||
s[out] = addState(s[out], st.inst.next(), st.match)
|
||||
}
|
||||
case _BRA:
|
||||
n := st.inst.(*_Bra).n
|
||||
st.match[2*n] = pos
|
||||
s[in] = addState(s[in], st.inst.next(), st.match)
|
||||
case _EBRA:
|
||||
n := st.inst.(*_Ebra).n
|
||||
st.match[2*n+1] = pos
|
||||
s[in] = addState(s[in], st.inst.next(), st.match)
|
||||
case _ALT:
|
||||
s[in] = addState(s[in], st.inst.(*_Alt).left, st.match)
|
||||
// give other branch a copy of this match vector
|
||||
s1 := make([]int, 2*(re.nbra+1))
|
||||
for i := 0; i < len(s1); i++ {
|
||||
s1[i] = st.match[i]
|
||||
}
|
||||
s[in] = addState(s[in], st.inst.next(), s1)
|
||||
case _END:
|
||||
// choose leftmost longest
|
||||
if !found || // first
|
||||
st.match[0] < final.match[0] || // leftmost
|
||||
(st.match[0] == final.match[0] && pos > final.match[1]) { // longest
|
||||
final = st
|
||||
final.match[1] = pos
|
||||
}
|
||||
found = true
|
||||
default:
|
||||
st.inst.print()
|
||||
panic("unknown instruction in execute")
|
||||
}
|
||||
}
|
||||
pos += charwidth
|
||||
}
|
||||
return final.match
|
||||
}
|
||||
|
||||
|
||||
// MatchString returns whether the Regexp matches the string s.
|
||||
// The return value is a boolean: true for match, false for no match.
|
||||
func (re *Regexp) MatchString(s string) bool { return len(re.doExecute(s, nil, 0)) > 0 }
|
||||
|
||||
|
||||
// Match returns whether the Regexp matches the byte slice b.
|
||||
// The return value is a boolean: true for match, false for no match.
|
||||
func (re *Regexp) Match(b []byte) bool { return len(re.doExecute("", b, 0)) > 0 }
|
||||
|
||||
|
||||
// MatchString checks whether a textual regular expression
|
||||
// matches a string. More complicated queries need
|
||||
// to use Compile and the full Regexp interface.
|
||||
func MatchString(pattern string, s string) (matched bool, error string) {
|
||||
re, err := CompileRegexp(pattern)
|
||||
if err != "" {
|
||||
return false, err
|
||||
}
|
||||
return re.MatchString(s), ""
|
||||
}
|
||||
|
||||
|
||||
// Match checks whether a textual regular expression
|
||||
// matches a byte slice. More complicated queries need
|
||||
// to use Compile and the full Regexp interface.
|
||||
func Match(pattern string, b []byte) (matched bool, error string) {
|
||||
re, err := CompileRegexp(pattern)
|
||||
if err != "" {
|
||||
return false, err
|
||||
}
|
||||
return re.Match(b), ""
|
||||
}
|
||||
@ -1,143 +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 testing
|
||||
|
||||
var good_re = []string{
|
||||
``,
|
||||
`.`,
|
||||
`^.$`,
|
||||
`a`,
|
||||
`a*`,
|
||||
`a+`,
|
||||
`a?`,
|
||||
`a|b`,
|
||||
`a*|b*`,
|
||||
`(a*|b)(c*|d)`,
|
||||
`[a-z]`,
|
||||
`[a-abc-c\-\]\[]`,
|
||||
`[a-z]+`,
|
||||
`[]`,
|
||||
`[abc]`,
|
||||
`[^1234]`,
|
||||
`[^\n]`,
|
||||
}
|
||||
|
||||
// TODO: nice to do this with a map
|
||||
type stringError struct {
|
||||
re string
|
||||
err string
|
||||
}
|
||||
|
||||
var bad_re = []stringError{
|
||||
{`*`, ErrBareClosure},
|
||||
{`(abc`, ErrUnmatchedLpar},
|
||||
{`abc)`, ErrUnmatchedRpar},
|
||||
{`x[a-z`, ErrUnmatchedLbkt},
|
||||
{`abc]`, ErrUnmatchedRbkt},
|
||||
{`[z-a]`, ErrBadRange},
|
||||
{`abc\`, ErrExtraneousBackslash},
|
||||
{`a**`, ErrBadClosure},
|
||||
{`a*+`, ErrBadClosure},
|
||||
{`a??`, ErrBadClosure},
|
||||
{`*`, ErrBareClosure},
|
||||
{`\x`, ErrBadBackslash},
|
||||
}
|
||||
|
||||
type vec []int
|
||||
|
||||
type tester struct {
|
||||
re string
|
||||
text string
|
||||
match vec
|
||||
}
|
||||
|
||||
var matches = []tester{
|
||||
{``, "", vec{0, 0}},
|
||||
{`a`, "a", vec{0, 1}},
|
||||
{`x`, "y", vec{}},
|
||||
{`b`, "abc", vec{1, 2}},
|
||||
{`.`, "a", vec{0, 1}},
|
||||
{`.*`, "abcdef", vec{0, 6}},
|
||||
{`^abcd$`, "abcd", vec{0, 4}},
|
||||
{`^bcd'`, "abcdef", vec{}},
|
||||
{`^abcd$`, "abcde", vec{}},
|
||||
{`a+`, "baaab", vec{1, 4}},
|
||||
{`a*`, "baaab", vec{0, 0}},
|
||||
{`[a-z]+`, "abcd", vec{0, 4}},
|
||||
{`[^a-z]+`, "ab1234cd", vec{2, 6}},
|
||||
{`[a\-\]z]+`, "az]-bcz", vec{0, 4}},
|
||||
{`[^\n]+`, "abcd\n", vec{0, 4}},
|
||||
{`[日本語]+`, "日本語日本語", vec{0, 18}},
|
||||
{`()`, "", vec{0, 0, 0, 0}},
|
||||
{`(a)`, "a", vec{0, 1, 0, 1}},
|
||||
{`(.)(.)`, "日a", vec{0, 4, 0, 3, 3, 4}},
|
||||
{`(.*)`, "", vec{0, 0, 0, 0}},
|
||||
{`(.*)`, "abcd", vec{0, 4, 0, 4}},
|
||||
{`(..)(..)`, "abcd", vec{0, 4, 0, 2, 2, 4}},
|
||||
{`(([^xyz]*)(d))`, "abcd", vec{0, 4, 0, 4, 0, 3, 3, 4}},
|
||||
{`((a|b|c)*(d))`, "abcd", vec{0, 4, 0, 4, 2, 3, 3, 4}},
|
||||
{`(((a|b|c)*)(d))`, "abcd", vec{0, 4, 0, 4, 0, 3, 2, 3, 3, 4}},
|
||||
{`a*(|(b))c*`, "aacc", vec{0, 4, 2, 2, -1, -1}},
|
||||
}
|
||||
|
||||
func compileTest(t *T, expr string, error string) *Regexp {
|
||||
re, err := CompileRegexp(expr)
|
||||
if err != error {
|
||||
t.Error("compiling `", expr, "`; unexpected error: ", err)
|
||||
}
|
||||
return re
|
||||
}
|
||||
|
||||
func TestGoodCompile(t *T) {
|
||||
for i := 0; i < len(good_re); i++ {
|
||||
compileTest(t, good_re[i], "")
|
||||
}
|
||||
}
|
||||
|
||||
func TestBadCompile(t *T) {
|
||||
for i := 0; i < len(bad_re); i++ {
|
||||
compileTest(t, bad_re[i].re, bad_re[i].err)
|
||||
}
|
||||
}
|
||||
|
||||
func matchTest(t *T, expr string, str string, match []int) {
|
||||
re := compileTest(t, expr, "")
|
||||
if re == nil {
|
||||
return
|
||||
}
|
||||
m := re.MatchString(str)
|
||||
if m != (len(match) > 0) {
|
||||
t.Error("MatchString failure on `", expr, "` matching `", str, "`:", m, "should be", len(match) > 0)
|
||||
}
|
||||
// now try bytes
|
||||
m = re.Match([]byte(str))
|
||||
if m != (len(match) > 0) {
|
||||
t.Error("Match failure on `", expr, "` matching `", str, "`:", m, "should be", len(match) > 0)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMatch(t *T) {
|
||||
for i := 0; i < len(matches); i++ {
|
||||
test := &matches[i]
|
||||
matchTest(t, test.re, test.text, test.match)
|
||||
}
|
||||
}
|
||||
|
||||
func matchFunctionTest(t *T, expr string, str string, match []int) {
|
||||
m, err := MatchString(expr, str)
|
||||
if err == "" {
|
||||
return
|
||||
}
|
||||
if m != (len(match) > 0) {
|
||||
t.Error("function Match failure on `", expr, "` matching `", str, "`:", m, "should be", len(match) > 0)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMatchFunction(t *T) {
|
||||
for i := 0; i < len(matches); i++ {
|
||||
test := &matches[i]
|
||||
matchFunctionTest(t, test.re, test.text, test.match)
|
||||
}
|
||||
}
|
||||
@ -135,19 +135,19 @@ func tRunner(t *T, test *Test) {
|
||||
|
||||
// An internal function but exported because it is cross-package; part of the implementation
|
||||
// of gotest.
|
||||
func Main(tests []Test) {
|
||||
func Main(matchString func(pat, str string) (bool, os.Error), tests []Test) {
|
||||
flag.Parse()
|
||||
ok := true
|
||||
if len(tests) == 0 {
|
||||
println("testing: warning: no tests to run")
|
||||
}
|
||||
re, err := CompileRegexp(*match)
|
||||
if err != "" {
|
||||
println("invalid regexp for -match:", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
for i := 0; i < len(tests); i++ {
|
||||
if !re.MatchString(tests[i].Name) {
|
||||
matched, err := matchString(*match, tests[i].Name)
|
||||
if err != nil {
|
||||
println("invalid regexp for -match:", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
if !matched {
|
||||
continue
|
||||
}
|
||||
if *chatty {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user