[cfe-dev] Language not recognized: 'c++-module-cpp-output'

[Boris Kolpackov via cfe-dev]

Boris Kolpackov <boris at codesynthesis.com> writes:

> David Blaikie <dblaikie at gmail.com> writes:
> 
> > I don't think it can, but maybe - the issue being that the contents of the
> > assert expression mustn't be evaluated or even parsed, etc, if assertions
> > are not enabled.
> 
> I don't think it will affect a lot of code if it is parsed and discarded
> when disabled. One will have to do things differently based on NDEBUG to
> craft something like this. Which will then disqualify it from this "already
> preprocessed" mode.
> 
> In fact, I would very much like to have a version of assert() that always
> evaluates the condition.

It was pointed to me off-list that there is a proposal[1] that would
provide the assert attribute as an alternative to the assert() macro:

[[assert: foo != 0 && bar == 0]];

[1] http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0542r0.html

Boris