constructor argument evaluation IMHO not necessarily left to right

[PeterSommerlad]

The following code might read errno before calling open... I am happy to be convinced otherwise.

programming-with-cpp20/08.30-structuredBindingsPOSIXError4/main.cpp

Line 23 in 491c83d

return ReturnCode{open(fileName), errno};

[PeterSommerlad]

see

"21) Every expression in a comma-separated list of expressions in a parenthesized initializer is evaluated as if for a function call (indeterminately-sequenced) "

on https://en.cppreference.com/w/cpp/language/eval_order