[Issue 24176] Parameters of opApply delegate don't have to be `ref`

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24176

Dlang Bot <dlang-bot at dlang.rocks> changed:

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--- Comment #1 from Dlang Bot <dlang-bot at dlang.rocks> ---
@ntrel created dlang/dlang.org pull request #3699 "[spec] Improve `opApply`
docs" fixing this issue:

- [spec] Improve `opApply` docs

  Show grammar for signature.
  Don't require `ref` delegate parameter.
  Explain non-ref ForeachType can match a ref OpApplyParameter.

  Fixes Issue 24176 - Parameters of opApply delegate don't have to be `ref`.

https://github.com/dlang/dlang.org/pull/3699

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