try.hpp File Reference

#include <tl_expected/expected.hpp>

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Macros
#define	TRY(expected)
	Unwrap an expected into a stack variable or return the unexpected value. More...

Macro Definition Documentation

TRY

#define TRY

(

expected

)

Value:

    ({                                                                             \
        auto const& _expected = (expected); /* Uglify name to prevent shadowing */ \
        if (!_expected.has_value()) return tl::unexpected(_expected.error());      \
        _expected.value();                                                         \
    })

Unwrap an expected into a stack variable or return the unexpected value.

This macro requires the use of non-standard C++. Compiler extensions must be enabled and -Wpedantic cannot be used. With GCC and Clang, you can disable -Wpedantic for an entire translation unit like this:

#pragma GCC diagnostic ignored "-Wpedantic"

You can disable -Wpedantic for a specific segment of code like so:

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
//...
#pragma GCC diagnostic pop

For more information on this particular compiler extension go to https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html