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<?php
class ConstantTemplateSyntaxElement extends AbstractTemplateSyntaxElement
{
public static function is_element(StringInputStream $input)
{
return $input->assert_next('(?:[0-9]+(?:\.[0-9]+)?)|(?:\'[^\']*\')|(?:true)|(?:false)');
}
public function parse(TemplateSyntaxParserContext $context, StringInputStream $input, StringOutputStream $output)
{
$matches = array();
if ($input->consume_next('(?P<constant>(?:[0-9]+(?:\.[0-9]+)?)|(?:\'[^\']*\')|(?:true)|(?:false))', '', $matches))
{
$constant = $matches['constant'];
$output->write($constant);
}
else
{
throw new TemplateRenderingException('invalid constant variable', $input);
}
}
}
?>