Summary
This episode builds on previous variadic template discussions, focusing on guaranteed execution order in parameter pack expansions. Jason demonstrates that while function parameter evaluation order is generally unspecified in C++, there are two specific contexts where order is guaranteed: initializer lists and comma-separated expressions. He shows how to leverage these guarantees when working with variadic templates to ensure operations are executed in the intended sequence, which is particularly important for side-effect operations in parameter pack expansions.
Related C++ Standard Sections
This episode covers topics found in these sections of the C++ standard:
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[diff.cpp23.dcl.dcl]50% match -
[initializer.list.syn]40% match -
[stringstream]40% match