Collaboration diagram for Assertions:

Files
file	assert-example.cc
	Example program illustrating the use of NS_ASSERT_MSG()

file	assert.h
	NS_ASSERT() and NS_ASSERT_MSG() macro definitions.

Macros
#define	NS_ASSERT(condition)
	At runtime, in debugging builds, if this condition is not true, the program prints the source file, line number and unverified condition and halts by calling std::terminate.

#define	NS_ASSERT_MSG(condition, message)
	At runtime, in debugging builds, if this condition is not true, the program prints the message to output and halts by calling std::terminate.

Macros defined by the build system.
These have to be visible for doxygen to document them, so we put them here in a file only seen by doxygen, not the compiler.
#define	NS3_ASSERT_ENABLE
	Enable asserts at compile time.

#define	NS3_LOG_ENABLE
	Enable logging at compile time.

Detailed Description

Assert functions and macros

The assert macros are used to verify at runtime that a certain condition is true. If it is not true, the program halts. These checks are built into the program only in debugging builds. They are removed in optimized builds.

These macro are intended to check certain conditions to be true. Do not put code that also have side effects that your program relies on (eg. code that advances an iterator and return false at end of file) because the code will not be executed on release builds!!

If assertion-style checks are required for release builds, use NS_ABORT_UNLESS and NS_ABORT_MSG_UNLESS.

Macro Definition Documentation

◆ NS3_ASSERT_ENABLE

#define NS3_ASSERT_ENABLE

Enable asserts at compile time.

This is normally set by ./ns3 configure --build-profile=debug.

Definition at line 99 of file main.h.

◆ NS3_LOG_ENABLE

#define NS3_LOG_ENABLE

Enable logging at compile time.

This is normally set by ./ns3 configure --build-profile=debug.

Definition at line 110 of file main.h.

◆ NS_ASSERT

#define NS_ASSERT ( condition )

Value:

    do                                                                                             \
    {                                                                                              \
        if (!(condition))                                                                          \
        {                                                                                          \
            std::cerr << "NS_ASSERT failed, cond=\"" << #condition << "\", ";                      \
            NS_FATAL_ERROR_NO_MSG();                                                               \
        }                                                                                          \
    } while (false)

At runtime, in debugging builds, if this condition is not true, the program prints the source file, line number and unverified condition and halts by calling std::terminate.

Parameters

[in] condition Condition to verify.

Definition at line 55 of file assert.h.

◆ NS_ASSERT_MSG

#define NS_ASSERT_MSG	(		condition,
			message )

Value:

    do                                                                                             \
    {                                                                                              \
        if (!(condition))                                                                          \
        {                                                                                          \
            std::cerr << "NS_ASSERT failed, cond=\"" << #condition << "\", ";                      \
            NS_FATAL_ERROR(message);                                                               \
        }                                                                                          \
    } while (false)

At runtime, in debugging builds, if this condition is not true, the program prints the message to output and halts by calling std::terminate.

Parameters

[in]	condition	Condition to verify.
[in]	message	Message to output

Definition at line 75 of file assert.h.

Files