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minor #4296 Clarify docs on registerUndefinedTokenParserCallback() (fabpot)

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This PR was merged into the 3.x branch.

Discussion
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Clarify docs on registerUndefinedTokenParserCallback()

Closes #3762

Commits
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d1b05519af Clarify docs on registerUndefinedTokenParserCallback()
This commit is contained in:
Fabien Potencier
2024-09-10 22:39:00 +02:00
parent 7ec2a4f112 d1b05519af
commit 34734d338f
1 changed files with 8 additions and 0 deletions
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doc/recipes.rst
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@@ -300,6 +300,14 @@ does not return ``false``.
As the resolution of functions/filters/tags is done during compilation,
there is no overhead when registering these callbacks.
.. warning::
As parsing a tag is specific to each tag (the syntax is free form), the
``registerUndefinedTokenParserCallback()`` cannot be used to define a
default implementation for all unknown tags. It's mainly useful to override
the default exception or to register on the fly TokenParser instances for
specific known tags.
Validating the Template Syntax
------------------------------