When the preprocessor encounters this directive, it replaces any occurrence ofidentifierin the rest of the code byreplacement. Thisreplacementcan be an expression, a statement, a block or simply anything. The preprocessor does not understand C++, it simply replaces any occurrence ofidentifierbyreplac...
So in visual studio community DEBUG directive will be used if we are in debug, but does this mean that even exe will use everything that is in DEBUG? Now if we define wither one like TEST will this be active in release when we create exe to deploy too?
nothing, in this case the directive has no effect. a line break. Themodule and import directivesare also preprocessing directives. (since C++20) Preprocessing directives must not come from macro expansion. #define EMPTYEMPTY# include <file.h> // not a preprocessing directive ...
ref:http://www.cplusplus.com/doc/tutorial/preprocessor/ concolusion: directives: #define #undef #include #if #else #elif #endif #ifdef #ifndef #error (#warning is NOT A STANDARD DIRECTIVE, since not shown in the page above, but most compilers have it. more:http://stackoverflow.com/quest...
Hi, I am linking a c-main to a function in a fortran90 module and I am debugging with idb. It cannot step into the fortran90 function if the function name is defined by a preprocessor directive. The function is declared by a preprocessor constant: I want to...
Software that performs some preliminary processing on the input before it is processed by the main program. Seepreprocessingandcompiler directive. Copyright © 1981-2019 byThe Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is stri...
c:\temp\test.cpp:__LINE__: fake error Figure 2: The preprocessor directive appears in the output. As shown in Figure 2, the__LINE__preprocessor directive itself has become a part of the output! The solution is to take theSTRINGIFY()solution one step further -- to wrap theSTRINGIFY()...
directive">, InGroup<ExtraTokens>; @@ -513,8 +505,6 @@ def err_pp_invalid_directive : Error< "invalid preprocessing directive%select{|, did you mean '#%1'?}0">; def warn_pp_invalid_directive : Warning< err_pp_invalid_directive.Summary>, InGroup<DiagGroup<"unknown-directives">>; ...
If we compile and run above code, this would produce the following result − Value of __LINE__ : 6 Value of __FILE__ : test.cpp Value of __DATE__ : Feb 28 2011 Value of __TIME__ : 18:52:48 Print Page Previous Next
preprocessor, directives df59990f-b420-43f3-b415-5c25493abeee corob-msft corob cplusplus Null Directive The null preprocessor directive is a single number sign (#) alone on a line. It has no effect. Syntax # See Also Preprocessor Directives...