/**
* @param ASTFunctionCall $functionCall
*
* @return mixed
* @throws Exception\UQLInterpreterException
*/
private function callFunction(ASTFunctionCall $functionCall)
{
try {
return $this->extensionContainer->callFunction($functionCall->getFunctionName(), $functionCall->getArguments());
} catch (\Exception $e) {
throw new UQLInterpreterException("The execution of function '" . $functionCall->getFunctionName() . "' failed. Please check the arguments are valid. (" . $e->getMessage() . ")");
}
}
/**
* Tries to match the following tokens to an <assertion>.
*
* @throws Exception\UQLSyntaxError
* @return bool|ASTAssertion
*/
public function matchAssertion()
{
$identifier = $this->nextToken();
if ($identifier['token'] != 'T_IDENTIFIER') {
// If a stream doesn't start with an identifier, it's not an <assertion>.
$this->rewindToken();
return false;
}
$operator = $this->matchOperator();
if ($operator === false) {
$this->nextToken();
// MatchOperator rewinds
$this->throwUnexpectedTokenSyntaxError(['OPERATOR'], 'Comparison operator expected after identifier');
}
$array = $this->matchArray();
if ($array) {
if ($operator['token'] !== 'T_OP_IN') {
throw new UQLSyntaxError("Arrays are only valid after operator IN");
}
return new ASTAssertion($identifier['match'], $operator['token'], $array);
}
$literal = $this->nextToken();
if ($literal['token'] == 'T_FUNCTION_CALL') {
return new ASTAssertion($identifier['match'], $operator['token'], ASTFunctionCall::createFromExpression($literal['match']));
}
if (strpos($literal['token'], 'T_LITERAL') !== 0) {
$this->throwUnexpectedTokenSyntaxError(['ARRAY_START', 'LITERAL'], 'Array, value or function call expected after comparison operator');
}
$literal = $this->transformLiteral($literal);
return new ASTAssertion($identifier['match'], $operator['token'], $literal['match']);
}
