C++26: A Placeholder with No Name -- Sandor Dargo
In this post, we are going to discuss a core language feature proposed by Corentin Jabot and Micheal Park in P2169R4. With the new standard we get a cool unnamed placeholder.
C++26: A Placeholder with No Name
by Sandor Dargo
From the article:
By convention, when we have a variable whose value we don’t want to use or care about, we often name it_. The problem is that with higher warning levels (-Wunused-variable), our compilation might fail because_is unused.
int foo() { return 42; } auto _ = foo(); /* error: unused variable '_' [-Werror,-Wunused-variable] */To avoid this problem, we must mark it
[[maybe_unused]].
Since its introduction, the 
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