Compilers and argument order of evaluation in C++

Question

Okay, I\'m aware that the standard dictates that a C++ implementation may choose in which order arguments of a function are evaluated, but are there any implementations that

Answer 1

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It's not an exact copy of your question, but my answer (and a few others) cover your question as well.

There are very good optimization reasons why the compiler might not just choose right-to-left but also interleave them.

The standard doesn't even guarantee a sequential ordering. It only guarantees that when the function gets called, all arguments have been fully evaluated.

And yes, I have seen a few versions of GCC do exactly this. For your example, foo(0,0) would be called, and i would be 2 afterwards. (I can't give you the exact version number of the compiler. It was a while ago - but I wouldn't be surprised to see this behavior pop up again. It's an efficient way to schedule instructions)