[Validator] Deprecate constraint "ExpressionLanguageSyntax", use "Expre…

[nicolas-grekas]

Q	A
Feature PR	symfony/symfony#45623
PR author(s)	@mpiot
Merged in	6.1

[wouterj]

Hi @mplot. Thanks for working on this Symfony feature. With the 6.1 release coming closer, are you willing to update the docs for this change?

I think it boils down to almost copy-pasting https://symfony.com/doc/current/reference/constraints/ExpressionLanguageSyntax.html and adding a .. deprecation:: 6.1 box in the old constraint? (similar to what I did in #16784 )

[mpiot]

@wouterj I've try a way:

• Add a link to the new ExpressionSyntax (copy/paste the old one)
• Add (deprecated) after the ExpressionLanguageSyntax (to not miss the old one)
• Add a message on the old ExpressionLanguageSyntax page

The other way is to delete the old, but it seems more difficult to retrieve the previous have informations about the change.

[javiereguiluz]

Closing as fixed in #16786.