2091 compilation failed with fno exception

[BartolomeyKant]

solves #2091

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[ispeters]

I don't actually have any authority here, but I'd prefer to see the changes made slightly narrower.

[ispeters]

I think this choice of scope excludes too many tests; I think it's only the scenarios that say throw that cause problems for -fno-exceptions builds. I'd prefer to have the other tests run in the no-exceptions build by narrowing the scope of this #if to only exclude the problematic scenarios.

[BartolomeyKant]

Do you mean exclude only throwing sections here and keep the "int() noexcept from just(42)" ?

[ericniebler]

/ok to test 3f26d49

[BartolomeyKant]

There is problems form Catch I forgot about. In local build I just remove Werror temporally.

/home/coder/stdexec/build/_deps/catch2-src/src/catch2/../catch2/catch_translate_exception.hpp:32:73: warning: unused parameter 'it' [-Wunused-parameter]
   32 |             std::string translate( ExceptionTranslators::const_iterator it, ExceptionTranslators::const_iterator itEnd ) const override {
      |                                                                         ^
/home/coder/stdexec/build/_deps/catch2-src/src/catch2/../catch2/catch_translate_exception.hpp:32:114: warning: unused parameter 'itEnd' [-Wunused-parameter]
   32 |             std::string translate( ExceptionTranslators::const_iterator it, ExceptionTranslators::const_iterator itEnd ) const override {
      |                                                                                                                  ^
2 warnings generated.