/**
* value: NUMBER | STRING | SYMBOL | '(' expr ')'
*/
private static function parseValue(Scanner $scanner)
{
switch ($scanner->tokenType()) {
case T_CONSTANT_ENCAPSED_STRING:
case T_DNUMBER:
case T_LNUMBER:
$result = new ConstantExpression($scanner->tokenValue());
break;
case T_STRING:
$result = new SymbolExpression($scanner->tokenValue());
break;
case '(':
$scanner->nextToken();
$result = self::parseExpr($scanner);
if ($scanner->tokenType() !== ')') {
throw new TemplateParserException('missing ")"', $scanner);
}
break;
default:
throw new TemplateParserException('syntax error', $scanner);
}
$scanner->nextToken();
return $result;
}
