function EnumFunction::compile

Overrides FunctionExpression::compile

File

vendor/twig/twig/src/Node/Expression/FunctionNode/EnumFunction.php, line 12

Class

EnumFunction

Namespace

Twig\Node\Expression\FunctionNode

Code

public function compile(Compiler $compiler) : void {
    $arguments = $this->getNode('arguments');
    if ($arguments->hasNode('enum')) {
        $firstArgument = $arguments->getNode('enum');
    }
    elseif ($arguments->hasNode('0')) {
        $firstArgument = $arguments->getNode('0');
    }
    else {
        $firstArgument = null;
    }
    if (!$firstArgument instanceof ConstantExpression || 1 !== \count($arguments)) {
        parent::compile($compiler);
        return;
    }
    $value = $firstArgument->getAttribute('value');
    if (!\is_string($value)) {
        throw new SyntaxError('The first argument of the "enum" function must be a string.', $this->getTemplateLine(), $this->getSourceContext());
    }
    if (!enum_exists($value)) {
        throw new SyntaxError(\sprintf('The first argument of the "enum" function must be the name of an enum, "%s" given.', $value), $this->getTemplateLine(), $this->getSourceContext());
    }
    if (!($cases = $value::cases())) {
        throw new SyntaxError(\sprintf('The first argument of the "enum" function must be a non-empty enum, "%s" given.', $value), $this->getTemplateLine(), $this->getSourceContext());
    }
    $compiler->raw(\sprintf('%s::%s', $value, $cases[0]->name));
}