✨ Add a predicate matcher to fields #803
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Problem: - Custom predicates on fields can be difficult to apply. - Match machinery is not SFINAE-friendly. - Message callbacks require a user-supplied matcher which is often just `always`. Solution: - Allow `with_predicate` on fields which receives the field value, rather than needing to receive the message and extract the field. - Apply SFINAE-friendly return types to `and`, `or` and `not` match combinators. - Allow `msg::callback` to be constructed without an extra matcher, just using the message's built-in matcher.
mjcaisse-intel
approved these changes
Nov 17, 2025
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Problem:
always.Solution:
with_predicateon fields which receives the field value, rather than needing to receive the message and extract the field.and,orandnotmatch combinators.msg::callbackto be constructed without an extra matcher, just using the message's built-in matcher.