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      assert

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      < cpp‎ | error

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      assert
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      Definido no cabeçalho <cassert>
      #ifdef NDEBUG

      #define assert(condition) ((void)0)
      #else
      #define assert(condition) /*implementation defined*/

      #endif
      A definição da macro assert depende de outra macro, NDEBUG, a qual não é definida pela biblioteca padrão.
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      The definition of the macro assert depends on another macro, NDEBUG, which is not defined by the standard library.
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      Se NDEBUG é definido como um nome de macro no ponto em que o código-fonte <cassert> é incluída, então não faz nada assert.
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      If NDEBUG is defined as a macro name at the point in the source code where <cassert> is included, then assert does nothing.
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      Se NDEBUG não está definido, em seguida, verifica assert se seu argumento (que deve ser do tipo escalar) compara igual a zero. Se isso acontecer, assert saídas aplicação específica informações de diagnóstico sobre a saída de erro padrão e chama std::abort. A informação de diagnóstico é necessária de modo a incluir o texto de expression, bem como os valores das macros standard __FILE__, __LINE__ eo __func__ variável padrão.
      Original:
      If NDEBUG is not defined, then assert checks if its argument (which must have scalar type) compares equal to zero. If it does, assert outputs implementation-specific diagnostic information on the standard error output and calls std::abort. The diagnostic information is required to include the text of expression, as well as the values of the standard macros __FILE__, __LINE__, and the standard variable __func__.
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      Índice

      [editar]Parâmetros

      condition -
      expressão do tipo escalar
      Original:
      expression of scalar type
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      [editar]Valor de retorno

      (Nenhum)
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      (none)
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      [editar]Exemplo

      #include <iostream>// uncomment to disable assert()// #define NDEBUG#include <cassert>   int main(){ assert(2+2==4);std::cout<<"Execution continues past the first assert\n"; assert(2+2==5);std::cout<<"Execution continues past the second assert\n";}

      Saída: 

      Execution continues past the first assert test: test.cc:8: int main(): Assertion `2+2==5' failed. Aborted

      [editar]Veja também

      afirmação estática
      realiza em tempo de compilação afirmação verificando (desde C++11)
      Original:
      performs compile-time assertion checking (desde C++11)
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      [edit]
      provoca finalização anormal do programa (sem limpeza)
      Original:
      causes abnormal program termination (without cleaning up)
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      (função)[edit]
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