<assert.h>: Diagnostics

Compile-time assert

C++ offers a compile-time built-in assert macro:

void static_assert(bool expression);
void static_assert(bool expression, const char*message);

It can be used like a function but also in declaration areas. A typical scenario is checking size of structures:

struct A{
 int a;
 char b;
};

static_assert(sizeof(A)==3, "Wrong size of struct A!");

Detailed Description

#include <assert.h>

This header file defines a debugging aid.

As there is no standard error output stream available for many applications using this library, the generation of a printable error message is not enabled by default. These messages will only be generated if the application defines the macro

__ASSERT_USE_STDERR

before including the <assert.h> header file. By default, only abort() will be called to halt the application.

Defines
#define	assert(expression)

Define Documentation