22 Diagnostics library [diagnostics]

22.3 Assertions [assertions]

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

22.3.1 Header <cassert> synopsis [cassert.syn]

#define assert(E) see below
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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 C 7.
2.

22.3.2 The assert macro [assertions.assert]

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An expression assert(E) is a constant subexpression ([defns.const.subexpr]), if
  • (1.1)
    NDEBUG is defined at the point where assert is last defined or redefined, or
  • (1.2)
    E contextually converted to bool (Clause [conv]) is a constant subexpression that evaluates to the value true.