19 Diagnostics library [diagnostics]

19.3 Assertions [assertions]

19.3.1 General [assertions.general]

The header provides a macro for documenting C++ program assertions and a mechanism for disabling the assertion checks.

19.3.2 Header <cassert> synopsis [cassert.syn]

#define assert(E) see below

The contents are the same as the C standard library header <assert.h>, except that a macro named static_assert is not defined.

See also: ISO/IEC 9899:2018, 7.2

19.3.3 The assert macro [assertions.assert]

An expression assert(E) is a constant subexpression, if

(1.1)
NDEBUG is defined at the point where assert is last defined or redefined, or
(1.2)
E contextually converted to bool is a constant subexpression that evaluates to the value true.