/**
* @todo use ast builder
*/
public function testGenerateXml()
{
$visitor = new Xml();
$this->assertEquals('<?xml version="1.0" encoding="utf-8"?>', $visitor->getXmlString());
$syntax = new Syntax();
$syntax->meta = "EBNF defined in itself.";
$syntax->title = "xis/ebnf v2.0 http://wiki.karmin.ch/ebnf/ gpl3";
$visitor = new Xml();
$syntax->accept($visitor);
$xml = file_get_contents(EBNF_TESTS_FIXTURS . "/visitor/syntax.xml");
$this->assertEquals('<?xml version="1.0" encoding="utf-8"?>' . "\n" . '<syntax title="xis/ebnf v2.0 http://wiki.karmin.ch/ebnf/ gpl3" meta="EBNF defined in itself."/>', $visitor->getXmlString());
$syntax = new Syntax();
$syntax->title = "EBNF defined in itself.";
$syntax->meta = "xis/ebnf v2.0 http://wiki.karmin.ch/ebnf/ gpl3";
$syntaxRule = new Rule($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$syntaxRule->name = "syntax";
$seq = new Sequence($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$opt = new Option($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "title";
$opt->addChild($ident);
$seq->addChild($opt);
$terminal = new Terminal($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal->value = "{";
$seq->addChild($terminal);
$loop = new Loop($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "rule";
$loop->addChild($ident);
$seq->addChild($loop);
$terminal = new Terminal($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal->value = "}";
$seq->addChild($terminal);
$opt = new Option($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "comment";
$opt->addChild($ident);
$seq->addChild($opt);
$syntaxRule->addChild($seq);
$syntax->addChild($syntaxRule);
$ruleRule = new Rule($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ruleRule->name = "rule";
$seq = new Sequence($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "identifier";
$seq->addChild($ident);
$choice = new Choice($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
foreach (array("=", ":", ":==") as $literal) {
$terminal = new Terminal($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal->value = $literal;
$choice->addChild($terminal);
}
$seq->addChild($choice);
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "expression";
$seq->addChild($ident);
$choice = new Choice($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
foreach (array(".", ";") as $literal) {
$terminal = new Terminal($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal->value = $literal;
$choice->addChild($terminal);
}
$seq->addChild($choice);
$ruleRule->addChild($seq);
$syntax->addChild($ruleRule);
$literalRule = new Rule($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$literalRule->name = "literal";
$choice = new Choice($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$seq = new Sequence($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal = new Terminal($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal->value = "'";
$seq->addChild($terminal);
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "character";
$seq->addChild($ident);
$loop = new Loop($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "character";
$loop->addChild($ident);
$seq->addChild($loop);
$seq->addChild($terminal);
$choice->addChild($seq);
$seq = new Sequence($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal = new Terminal($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$terminal->value = '"';
$seq->addChild($terminal);
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "character";
$seq->addChild($ident);
$loop = new Loop($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident = new Identifier($this->getMock('de\\weltraumschaf\\ebnf\\ast\\Node'));
$ident->value = "character";
$loop->addChild($ident);
$seq->addChild($loop);
$seq->addChild($terminal);
$choice->addChild($seq);
$literalRule->addChild($choice);
$syntax->addChild($literalRule);
$visitor = new Xml();
$syntax->accept($visitor);
$xml = file_get_contents(EBNF_TESTS_FIXTURS . "/visitor/syntax.xml");
$this->assertEquals($xml, $visitor->getXmlString());
}
/**
* Parses an EBNF factor:
* factor = identifier
* | literal
* | "[" expression "]"
* | "(" expression ")"
* | "{" expression "}" .
*
* @param Node $parent Parent node.
*
* @throws SyntaxtException
* @return DOMElement
*/
private function parseFactor(Node $parent)
{
if ($this->scanner->currentToken()->isType(Token::IDENTIFIER)) {
$identifier = $this->dom->createElement(Type::IDENTIFIER);
$identifier->setAttribute('value', $this->scanner->currentToken()->getValue());
$identifierNode = new Identifier($parent);
$identifierNode->value = $this->scanner->currentToken()->getValue();
return array($identifier, $identifierNode);
}
if ($this->scanner->currentToken()->isType(Token::LITERAL)) {
/*if ($this->assertToken($this->scanner->peekToken(), Token::OPERATOR, "::")) {
echo "range";
$range = $this->dom->createElement(Type::RANGE);
$range->setAttribute("from", $this->scanner->currentToken()->getValue(true));
$this->scanner->nextToken(); // Omit ".." literal.
$this->scanner->nextToken();
$range->setAttribute("to", $this->scanner->currentToken()->getValue(true));
return $range;
}*/
$literal = $this->dom->createElement(Type::TERMINAL);
$literal->setAttribute('value', $this->scanner->currentToken()->getValue(true));
$literalNode = new Terminal($parent);
$literalNode->value = $this->scanner->currentToken()->getValue(true);
return array($literal, $literalNode);
}
if ($this->assertToken($this->scanner->currentToken(), Token::OPERATOR, '(')) {
$this->scanner->nextToken();
$expression = $this->parseExpression($parent);
if (!$this->assertToken($this->scanner->currentToken(), Token::OPERATOR, ')')) {
$this->raiseError("Group must end with ')'");
}
return $expression;
}
if ($this->assertToken($this->scanner->currentToken(), Token::OPERATOR, '[')) {
$option = $this->dom->createElement(Type::OPTION);
$this->scanner->nextToken();
$expression = $this->parseExpression($parent);
$option->appendChild($expression[0]);
$optionNode = new Option($parent);
$optionNode->addChild($expression[1]);
if (!$this->assertToken($this->scanner->currentToken(), Token::OPERATOR, ']')) {
$this->raiseError("Option must end with ']'");
}
return array($option, $optionNode);
}
if ($this->assertToken($this->scanner->currentToken(), Token::OPERATOR, '{')) {
$loop = $this->dom->createElement(Type::LOOP);
$this->scanner->nextToken();
$expression = $this->parseExpression($parent);
$loop->appendChild($expression[0]);
$loopNode = new Loop($parent);
$loopNode->addChild($expression[1]);
if (!$this->assertToken($this->scanner->currentToken(), Token::OPERATOR, '}')) {
$this->raiseError("Loop must end with '}'");
}
return array($loop, $loopNode);
}
$this->raiseError("Factor expected");
}