Broken with Twig 2.10.0

[jean-gui]

Twig 2.10.0 was recently released and it seems to be breaking this extension with the following message when calling the 'filter' filter :

Unexpected token "arrow function" of value "=>".

[crabnky]

Have the same - had to switch back to twig 2.9

[DevManen]

Same error with Twig 1.41.0 Downgrading to Twig 1.39.1 worked

[vialcollet]

Same here. I had to downgrade twig from 2.11 to ~2.9

[jean-gui]

I just realized that filter and map are included in Twig 2.10 and Twig 1.41 thus making this extension unnecessary in those cases.

[crabnky]

@jean-gui yeah, right - I use it for group_by functionality

[gmhenderson]

I could be wrong, but it seems like the main issue is that this extension's => token now conflicts with Twig's built-in => token. As a (hopefully temporary) workaround, I forked the repo and changed the token to ==>. This was line 22 and 28 of LambdaExtension.php:

public function getOperators()
    {
        return [
            [
-                '=>' => [
+               '==>' => [
                    'precedence' => 0,
                    'class' => '\DPolac\TwigLambda\NodeExpression\SimpleLambda'
                ],
            ],
            [
-                '=>' => [
+               '==>' => [
                    'precedence' => 0,
                    'class' => '\DPolac\TwigLambda\NodeExpression\LambdaWithArguments',
                    'associativity' => \Twig_ExpressionParser::OPERATOR_LEFT
                ],
                ';' => [
                    'precedence' => 5,
                    'class' => '\DPolac\TwigLambda\NodeExpression\Arguments',
                    'associativity' => \Twig_ExpressionParser::OPERATOR_RIGHT
                ],
            ]
        ];
    }

I then updated my template code to use ==> instead of =>, i.e.:

{% set myVar = data|group_by(==> ...) %}

I'm not sure what other better option there is besides than changing twig-lambda's token.

[blupointmedia]

@gmhenderson, you are correct. I exended the LambdaExtension class and overrode the getOperators() method and it works again as expected.