noexcept Specifier & Operator

Specifies that a function will not throw. The compiler can optimize accordingly.

void safe() noexcept { /* ... */ }
void risky(); // may throw

Conditional noexcept

void never_throw() noexcept;
void demo() noexcept(noexcept(never_throw()));

Best Practices

• Mark small, low-level functions that cannot throw.

• Do not mark functions noexcept if they might legitimately throw.