/**
* Will parse the regex into generator
*
* @access public
* @return
*/
public function parse($sub = false)
{
try {
while ($this->lexer->moveNext()) {
$result = null;
$scope = null;
$parser = null;
switch (true) {
case $this->lexer->isNextToken(Lexer::T_GROUP_OPEN):
# is the group character the first token? is the regex wrapped in brackets.
//if($this->lexer->token === null) {
// continue;
//}
# note this is a new group create new parser instance.
$parser = new Parser($this->lexer, new Scope(), new Scope());
$this->left = $parser->parse(true)->getResult();
$this->head->attach($this->left);
break;
case $this->lexer->isNextToken(Lexer::T_GROUP_CLOSE):
# group is finished don't want to contine this loop break = 2
break 2;
break;
case $this->lexer->isNextTokenAny(array(Lexer::T_LITERAL_CHAR, Lexer::T_LITERAL_NUMERIC)):
# test for literal characters (abcd)
$this->left = new LiteralScope();
$this->left->addLiteral($this->lexer->lookahead['value']);
$this->head->attach($this->left);
break;
case $this->lexer->isNextToken(Lexer::T_SET_OPEN):
# character classes [a-z]
$this->left = new LiteralScope();
self::createSubParser('character')->parse($this->left, $this->head, $this->lexer);
$this->head->attach($this->left);
break;
case $this->lexer->isNextTokenAny(array(Lexer::T_DOT, Lexer::T_SHORT_D, Lexer::T_SHORT_NOT_D, Lexer::T_SHORT_W, Lexer::T_SHORT_NOT_W, Lexer::T_SHORT_S, Lexer::T_SHORT_NOT_S)):
# match short (. \d \D \w \W \s \S)
$this->left = new LiteralScope();
self::createSubParser('short')->parse($this->left, $this->head, $this->lexer);
$this->head->attach($this->left);
break;
case $this->lexer->isNextTokenAny(array(Lexer::T_SHORT_P, Lexer::T_SHORT_UNICODE_X, Lexer::T_SHORT_X)):
# match short (\p{L} \x \X )
$this->left = new LiteralScope();
self::createSubParser('unicode')->parse($this->left, $this->head, $this->lexer);
$this->head->attach($this->left);
break;
case $this->lexer->isNextTokenAny(array(Lexer::T_QUANTIFIER_OPEN, Lexer::T_QUANTIFIER_PLUS, Lexer::T_QUANTIFIER_QUESTION, Lexer::T_QUANTIFIER_STAR, Lexer::T_QUANTIFIER_OPEN)):
# match quantifiers
self::createSubParser('quantifer')->parse($this->left, $this->head, $this->lexer);
break;
case $this->lexer->isNextToken(Lexer::T_CHOICE_BAR):
# match alternations
$this->left = $this->head;
$this->head = new Scope();
$this->result->useAlternatingStrategy();
$this->result->attach($this->head);
break;
default:
# ignore character
}
}
} catch (ParserException $e) {
$pos = $this->lexer->lookahead['position'];
$compressed = $this->compress();
throw new ParserException(sprintf('Error found STARTING at position %s after `%s` with msg %s ', $pos, $compressed, $e->getMessage()));
}
return $this;
}
public function testGenerateWithAlternatingStrategy()
{
$scope = new Scope('scope1');
$gen = new MersenneRandom(700);
$result = '';
$scope->setMinOccurances(7);
$scope->setMaxOccurances(7);
for ($i = 1; $i <= 6; $i++) {
$lit = new LiteralScope('label_' . $i);
$lit->addLiteral($i);
$scope->attach($lit);
$lit = null;
}
$scope->useAlternatingStrategy();
$scope->generate($result, $gen);
$this->assertRegExp('/[1-6]{7}/', $result);
}
