c++ - Writing debug build only assertion function ignoring side-effects -


today discovered of assertion functions still exist , being called in release build. here's example of assertion function.

bool const isdebugmode() {     return false;  // controlled preprocessor flag. } void assertwithreason(bool const condition, std::string const reason = "") {     if (isdebugmode() , not condition)     {         abort();     } }

i think side-effect in condition expression preventing eliminating assertion call.

for example,

assertwithreason(glgeterror() == gl_no_error);

i expected assertion call eliminated, not. because being executed before checking debug-build.

i not sure how c++ handles case, c++ strict language, doesn't seem eliminated unless put special flag. anyway, intentionally wrote assertions removed in release build.

is possible write function surely removed in release build in c++? of course can use preprocessor macro, want avoid using preprocessor macro as possible.

i using clang, , compiler specific extension (such gcc attribute) fine.

i quite using macros purpose. yes, know, macros evil, knives (used wrong) evil, come in handy if use them right. 

 #define my_assert(x) {\        if (is_debug() && !x) assertfailed(__file__, __line__, __function__, #x);\      } while(0);

now can show failed (my_drawfunc.cpp: 34 : my_do_draw(): assertion failed: glgeterror == gl_no_error or that.


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