shrub/outside/re2/doc/mksyntaxgo
Steve Dee 27dd121d14 Add 'outside/re2/' from commit '539b44fc4c5a49c3453b80e3af85d297f4cab4bf'
git-subtree-dir: outside/re2
git-subtree-mainline: f94738bfd171ae447133e0964843addbb497894f
git-subtree-split: 539b44fc4c5a49c3453b80e3af85d297f4cab4bf
2014-04-10 11:36:47 -07:00

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#!/bin/sh
set -e
out=$GOROOT/src/pkg/regexp/syntax/doc.go
cp syntax.txt $out
sam -d $out <<'!'
,x g/NOT SUPPORTED/d
/^Unicode character class/,$d
,s/[«»]//g
,x g/^Possessive repetitions:/d
,x g/\\C/d
,x g/Flag syntax/d
,s/.=(true|false)/flag &/g
,s/^Flags:/ Flag syntax is xyz (set) or -xyz (clear) or xy-z (set xy, clear z). The flags are:\n/
,s/\n\n\n+/\n\n/g
,x/(^.* .*\n)+/ | awk -F' ' '{printf(" %-14s %s\n", $1, $2)}'
1,2c
// Copyright 2012 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.
// DO NOT EDIT. This file is generated by mksyntaxgo from the RE2 distribution.
/*
Package syntax parses regular expressions into parse trees and compiles
parse trees into programs. Most clients of regular expressions will use the
facilities of package regexp (such as Compile and Match) instead of this package.
Syntax
The regular expression syntax understood by this package when parsing with the Perl flag is as follows.
Parts of the syntax can be disabled by passing alternate flags to Parse.
.
$a
*/
package syntax
.
w
q
!