Comments on: Stupid C++ Tricks: Adventures in Assert

By: ColorIt | Fatal Abstraction

ColorIt | Fatal Abstraction — Sun, 05 Feb 2012 15:43:05 +0000

[...] such as a tracing heap allocator, static and run-time assertions (thanks Niklas Frykholm, Charles Nicholson and Tom Forsyth) as well as logging of various debug-streams to [...]

By: Frosty

Frosty — Tue, 27 Sep 2011 21:36:07 +0000

The “(void)sizeof(x)” trick does no longer work in VS2010, which is a pity because I use it all of the time.
Does anyone know a replacement that accomplishes the same?

By: Assert - Pulsar Engine

Assert - Pulsar Engine — Sat, 21 Aug 2010 09:50:23 +0000

[...] I give you for this is outlined in a post about Assert from they guys at Power of Two Games: Stupid C++ Tricks: Adventures in Assert). Briefly, you need to test that an assertion thrown you will need to add some additional hooks [...]

By: Danny Parker

Danny Parker — Thu, 29 Jul 2010 15:01:37 +0000

This page is a great source of general information not just about asserts. I reference it often.

So when I saw this i thought I should return the favour:

http://www.jaggersoft.com/pubs/CVu11_3.html

: D

By: GameCoder.it − L’assert, questa sconosciuta

GameCoder.it − L’assert, questa sconosciuta — Sun, 28 Feb 2010 21:59:27 +0000

[...] articolo di JP sulle nuove assert statiche del C++0x. riferimenti: http://cnicholson.net/2009/02/stupid-c-tricks-adventures-in-assert/ http://msinilo.pl/blog/?p=212 Share and [...]

By: Jan Řrřola Kadlec

Jan Řrřola Kadlec — Tue, 12 Jan 2010 14:30:28 +0000

Thanks everyone for the article and comments. This is how my C/C++ assert macros look like now:

#include

typedef int (*AssertHandler)(char const*, char const*, int);

int default_assert_handler(char const* expr, char const* file, int line)
{ fprintf(stderr, “Assertion (%s) failed in %s (%d)\n”, expr, file, line);
return 1;
}

AssertHandler assert_handler = default_assert_handler;

#if defined(_MSC_VER)
#define ASSERT_HALT() __debugbreak()
#else
#include
#define ASSERT_HALT() exit(__LINE__)
#endif

#ifdef DEBUG
#define assert(x) ((void)(!(x) && assert_handler(#x, __FILE__, __LINE__) && (ASSERT_HALT(), 1)))
#else
#define assert(x) ((void)sizeof(x))
#endif

By: Kevin Wentzell

Kevin Wentzell — Sat, 02 Jan 2010 07:00:36 +0000

THANK YOU SO MUCH! I was in the middle of banging my head down to a few thousand lines of code when I stumbled upon your page. The problem:

#define ASSERT( n )\
if ( !n )\
{\
return;\
}

and eventually got a hint when this code wasn’t returning from the block:

ASSERT( 2 > 2 )

Thank you >.<

By: Chris

Chris — Thu, 17 Dec 2009 23:35:40 +0000

Just a note that (at least under the version I’m using) __builtin_trap() in GCC works like __debugbreak(). I’m finding this real handy with Xilinx’s GDB-based debugger for the PowerPC405 on their Virtex-4 FPGAs. Thanks!

By: Anthony Whitaker

Anthony Whitaker — Sat, 21 Nov 2009 00:30:33 +0000

I’ve found that the code below does a decent job on several compilers at silencing that pesky constant conditional expression warning.

// This is simply not enough on some compilers.
do {} while(__LINE__ == -1)

Instead I use these macros to surround multi-line macros.
#define GorkMacroOpen do {
#define GorkMacroClose } while(__LINE__ == -1, false)

Looking forward to more articles Charles
It’s time to update

By: cyberursus

cyberursus — Sun, 04 Oct 2009 16:43:31 +0000

The following code

#define NDEBUG 1

#include

int main()
{
bool failed = false;
assert(failed);
}

shows ‘unused variable’ warning for both GCC and MSVC…