👍

Thank you @jdespatis.

Actually, wrapping in quotes is not required in YAML 1.2 (which is used by Symfony), only in YAML 1.0 or 1.1 (which is used by Pygments when doing syntax highlighting)

@stof , I'm using https://github.com/nodeca/js-yaml as a YAML 1.2 Parser, and it crashes because of those %..%

=> You think it's a bug in this tool that doesn't respect 1.2 spec?

if it crashes on such file, it means it is not a compliant 1.2 parser. You should report a bug to the parser

ok, gonna do that so
(indeed, it doesn't crash but mark the %..% as invalid)

@stof according to the yaml 1.2 specs: http://www.yaml.org/spec/1.2/spec.html, the % is forbidden, it's a directive start symbol
(look at the 5.3. Indicator Characters section)

@fabpot Is there some unit test somewhere that checks the validity of each yaml file of symfony-standard ?
I think it would be interesting to have this to be sure all yaml config files are valid

My yaml reader crashes for another yaml file for example: https://github.com/symfony/symfony-standard/blob/v2.6.4/app/config/routing.yml
due to the @ symbol, which is forbidden, (reserved for futur use in yaml 1.2)

@jdespatis See http://www.yaml.org/spec/1.2/spec.html#id2788859 The plain style for scalars allows %, because it is not ambiguous with directives

@stof I've read this section, but I'm not sure to see where it's said that this % is allowed (I can however read the starting character : ? ~ are allowed on some circumstances)

Please could you quote to me the text that indicates it's possible ?