[SUGGESTION] Option to disable UFCS

[MaxSagebaum]

As shown in the comment https://github.com/hsutter/cppfront/pull/904#issuecomment-2150622367 UFCS macro/template can have a real impact on compile times. Also, it improved with the later patches, the error messages a some times quite problematic.

name	compile	compile adjusted	compile relative
base_03_cpp2_struct-compile	14.14	0	0
cleanup_00_base-compile	25.48	11.35	1
cleanup_01_remove_UFCS-compile	19.49	5.36	0.47

Therefore I would like to start a discussion about options to disable UFCS for some code parts and maybe for other safety features as well.

• What do you think about the general idea?
• One idea of mine would be to use metafunctions to change the state of the cppfront compiler. e.g.

  test: @UFCS_NO namespace = {
  // UFCS disabled for the namespace
  func: () = {
  @UFCS_YES {
     // UFCS enabled in this scope.
  }
  }
  }

  • A different function call operator? E.g. obj.func(! a, b) or func2(! a, b). So the (! operator disables UFCS. ( I used (! because I have no better idea.)
  • The same technique could be used to disable e.g. bounds checking in loops.

What are your thoughts?

[zaucy]

possibly duplicate of #1004

[MaxSagebaum]

Yes, sorry forgot to search.