Feature: defer

[liss-h]

Implements a mechanism like GO's defer or C23's defer proposal or Andrei Alexandrescu's SCOPE_EXIT mechanism.

Open question:

• Do we want to keep the macro naming as is or do we name them DICE_DEFER to avoid conflicts?
  • Pro keeping names: short, readable
  • Pro changing names: more unlikely to conflict with macros from other people

[bigerl]

Thx for the PR. Beautifully built. thx. two minor things.
Regarding your question: I would change the names to DICE_DEFER, etc.

[bigerl]

docstring comments ScopeGuardOnExit not the namespace at the moment. To document the namespace, it's name should be changed. Please also change the name of the namespace where it is used.

PS: The changes look good otherwise and the explanations are easy to follow. 👍🏻

[bigerl]

Sorry for the review dribbling in one thing after another.

I just had another look at the branch and realized that a mentioning of the new library feature in https://github.com/dice-group/dice-template-library/tree/feature/defer?tab=readme-ov-file#dice-template-library and a short description in https://github.com/dice-group/dice-template-library/tree/feature/defer?tab=readme-ov-file#usage is missing.

[bigerl]

The change DEFER* -> DICE_DEFER* is still missing

see: #31 (review)

[liss-h]

The change DEFER* -> DICE_DEFER* is still missing

see: #31 (review)

Ups, I didn't see that

[bigerl]

pefect. thx :)