/**
* @return Expression
*/
public function parseVariableOrMethodCallExpression()
{
list($token, $name) = $this->tokenStream->current();
if ($token !== Tokens::T_LITERAL) {
throw ParseException::createInvalidTokenException([Tokens::T_LITERAL], $this->tokenStream);
}
$this->tokenStream->next();
list($token, ) = $this->tokenStream->current();
// check for method call
if ($token === Tokens::T_OPEN_PAREN) {
// eat open paren
$this->tokenStream->next();
$arguments = [];
do {
list($token, ) = $this->tokenStream->current();
if ($token !== Tokens::T_CLOSE_PAREN) {
$arguments[] = $this->parseExpression();
list($token, ) = $this->tokenStream->current();
if ($token !== Tokens::T_COMMA && $token !== Tokens::T_CLOSE_PAREN) {
throw ParseException::createInvalidTokenException([Tokens::T_COMMA, Tokens::T_CLOSE_PAREN], $this->tokenStream);
}
}
// eat T_COMMA or T_CLOSE_PAREN
$this->tokenStream->next();
} while ($token !== Tokens::T_CLOSE_PAREN);
$expression = new Expressions\MethodCall($name, $arguments);
list($token, ) = $this->tokenStream->current();
} else {
// strip preceding '$' string, if present
if (strpos($name, '$') === 0) {
$name = substr($name, 1);
}
$expression = new Expressions\Variable($name);
while ($token === Tokens::T_ATTR_SEP) {
$this->tokenStream->next();
list($token, $attributeName) = $this->tokenStream->current();
if ($token !== Tokens::T_LITERAL) {
throw ParseException::createInvalidTokenException([Tokens::T_LITERAL], $this->tokenStream);
}
$this->tokenStream->next();
$expression = new Expressions\GetAttribute($expression, $attributeName);
list($token, ) = $this->tokenStream->current();
}
}
if ($token === Tokens::T_PIPE) {
// eat pipe token
$this->tokenStream->next();
list($token, $filterName) = $this->tokenStream->current();
if ($token !== Tokens::T_LITERAL) {
throw ParseException::createInvalidTokenException([Tokens::T_LITERAL], $this->tokenStream);
}
$this->tokenStream->next();
$expression = new Expressions\MethodCall($filterName, [$expression]);
}
return $expression;
}
private function parseIfBlock()
{
list($token, ) = $this->tokenStream->current();
if ($token !== Tokens::T_BLOCK_IF && $token !== Tokens::T_BLOCK_UNLESS) {
throw ParseException::createInvalidTokenException([Tokens::T_BLOCK_IF, Tokens::T_BLOCK_UNLESS], $this->tokenStream);
}
$invertedCondition = $token === Tokens::T_BLOCK_UNLESS;
$this->tokenStream->next();
$condition = $this->expressionParser->parseExpression();
if ($invertedCondition) {
$condition = new Expressions\Unary($condition, Expressions\Unary::OPERATION_NOT);
}
$this->visitor->ifBlock($condition);
// keep parsing statements until we see a block end
list($token, ) = $this->tokenStream->current();
while ($token !== Tokens::T_BLOCK_END) {
// check if we have an "else" or "else if" block
if ($token === Tokens::T_BLOCK_ELSE) {
$this->visitor->elseBlock();
$this->tokenStream->next();
} else {
if ($token === Tokens::T_BLOCK_ELSE_IF) {
$this->tokenStream->next();
$condition = $this->expressionParser->parseExpression();
$this->visitor->elseIfBlock($condition);
}
}
$this->parseStatement();
list($token, ) = $this->tokenStream->current();
}
// consume T_BLOCK_END
$this->tokenStream->next();
// skip optional trailing literal
if ($this->tokenStream->current()[0] === Tokens::T_LITERAL) {
$this->tokenStream->next();
}
$this->visitor->endIfBlock();
}