Make warnings in assertions fire for GCC/Clang again

The old code caused warnings to fire under MSVC, and Clang <3.8.
I could not find a GCC version where it worked, but I assume that it
did at some point.

This new code causes all of MSVC, GCC, Clang, in current versions,
to emit signed/unsigned comparison warning in test like this:

```cpp
TEST_CASE() {
    int32_t i = -1;
    uint32_t j = 1;
    REQUIRE(i != j);
}
```

Where previously only MSVC would emit the warning.

Fixes #1880
3 files changed
tree: 1a75042517e65540e55c6d2b2b863b19ffdc1ac1
  1. .conan/
  2. .github/
  3. artwork/
  4. CMake/
  5. contrib/
  6. docs/
  7. examples/
  8. include/
  9. misc/
  10. projects/
  11. scripts/
  12. single_include/
  13. third_party/
  14. .gitattributes
  15. .gitignore
  16. .travis.yml
  17. appveyor.yml
  18. CMakeLists.txt
  19. CODE_OF_CONDUCT.md
  20. codecov.yml
  21. conanfile.py
  22. LICENSE.txt
  23. README.md
README.md

catch logo

Github Releases Build Status Build status codecov Try online Join the chat in Discord: https://discord.gg/4CWS9zD

The latest version of the single header can be downloaded directly using this link

Catch2 is released!

If you've been using an earlier version of Catch, please see the Breaking Changes section of the release notes before moving to Catch2. You might also like to read this blog post for more details.

What's the Catch?

Catch2 is a multi-paradigm test framework for C++. which also supports Objective-C (and maybe C). It is primarily distributed as a single header file, although certain extensions may require additional headers.

How to use it

This documentation comprises these three parts:

More