protected function createImageLink()
{
$ext = PEG::choice('.jpg', '.png', '.gif');
$src_char = PEG::pack('[', PEG::seq(PEG::many1(PEG::subtract($this->lineChar, ']', $ext)), $ext), ']');
$src = PEG::join($src_char);
$alt_char = PEG::pack('[', PEG::many1(PEG::subtract($this->lineChar, ']')), ']');
$alt = PEG::join($alt_char);
$parser = PEG::seq($src, PEG::optional($alt));
return $this->nodeCreater(OrgModeSyntax_Node::TYPE_IMAGELINK, $parser, array('src', 'alt'));
}
<?php
/**
* 行頭に#があったら無視するパーサのサンプル
*/
include_once dirname(__FILE__) . '/../code/PEG.php';
$line = PEG::line();
$ignore = PEG::drop(PEG::andalso('#', $line));
$parser = PEG::join(PEG::many(PEG::choice($ignore, $line)));
$context = PEG::context('
Lorem ipsum dolor sit amet,
#consectetur adipisicing elit,
#sed do eiusmod tempor incididunt ut
labore et dolore magna aliqua.
');
var_dump($parser->parse($context));
/* 結果
string(64) "
Lorem ipsum dolor sit amet,
labore et dolore magna aliqua.
"
*/
protected function createNullLink()
{
$body = PEG::join(PEG::many1(PEG::subtract($this->lineChar, '[]')));
$parser = PEG::pack(']', $body, '[');
return $parser;
}
<?php
include_once dirname(__FILE__) . '/t/t.php';
$lime = new lime_test();
$join = PEG::join(PEG::seq('b', PEG::many('a')));
$context = PEG::context('baaa');
$lime->is($join->parse($context), 'baaa');
<?php
include_once dirname(__FILE__) . '/../code/PEG.php';
/*
* 単語にヒットするパーサ。
*
* EBNF:
* word := (PEG::alphabet | "_") (PEG::alphabet | PEG::digit | "_")+
*/
$word = PEG::join(PEG::seq(PEG::choice(PEG::alphabet(), PEG::token('_')), PEG::many(PEG::choice(PEG::alphabet(), PEG::digit(), PEG::token('_')))));
var_dump($word->parse(PEG::context('a')));
//=> 'a'
var_dump($word->parse(PEG::context('hogehoge')));
//=> 'hogehoge'
var_dump($word->parse(PEG::context('some_id')));
//=> 'some_id'
var_dump($word->parse(PEG::context(' ')));
//=> パースに失敗する
var_dump($word->parse(PEG::context('hoge fuga')));
//=> パースはコンテキストの途中で止まり 'hoge'が返る
