hot take: if C++ was truly committed to zero cost abstractions, functions would have opt-in reentrancy, the same way classes have opt-in vtables
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{ static signed char foo = 126; foo++; // this moves bar off the stack int bar; ... foo--; }
Move foo++ in the constructor of a local object and foo-- in the destructor and yell "zero cost abstraction" three times... it's for a compiler benchmark after all. :)
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"zero cost abstraction" is the "no copyright intended" of c++ development.
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now I am imagining something like a std::not_reentrant r; marker
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