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Re: Preprocessor definitions on the command line 17 Years Ago by thekashyap … are processed at the time of compilation. Arguments relevant to preprocessor (e.g. -DXXX=value) are passed to compiler and used… Re: Preprocessor and typedef 16 Years Ago by csurfer …: 1. the scanner (lexical analyser) works "before" preprocessor so your 1st statement is wrong... 2. The C… preprocessor is a one-pass text processor...[/QUOTE] No buddy …doubts. #define is dealt with by preprocessor right and not lexixal analyser ? And as preprocessor is a one pass text processor … Re: Preprocessor directives 10 Years Ago by tgreiner … not what is happening. The mere presence of these preprocessor lines are preventing the file from compiling. However, if…'t that the whole point of using the define preprocessor around the contents of a header file, so that…get incorporated within the code? But if the #define preprocessor is not carrying is definintions across the different files … Preprocessor and typedef 16 Years Ago by csurfer … know #define statements are executed before the program is compiled (preprocessor directives) and so the characters used should have no other…=c]#define int float[/code] How many passes would the preprocessor directives run for as for the following type of statements… Re: Preprocessor and typedef 16 Years Ago by ArkM It seems it's your homework... See this forum rules... ;) Some tips: 1. the scanner (lexical analyser) works "before" preprocessor so your 1st statement is wrong... 2. The C preprocessor is a one-pass text processor... Re: Preprocessor Directives , Help plz .. 14 Years Ago by vijayan121 … arguments[/quote] One option is to use the boost preprocessor metaprogramming library. [url]http://www.boost.org/doc/libs…/1_45_0/libs/preprocessor/doc/index.html[/url] For example, [b]file /…tmp/pp.h[/b] [code]#include <boost/preprocessor.hpp> #include <boost/any.hpp> #include … Re: Preprocessor directives 10 Years Ago by tgreiner … std:: to variable declarations. But, when USES_ERROR_HANDLER_H is defined the preprocessor should just include "ErrorHandler.h" and ignore everything… class related code is should not be relevant because the preprocessor should skip over it. But that is not what is… Preprocessor directives 21 Years Ago by BlackDice …'), I could just write this: ptr = new CSomePointer; CHECKPTR the preprocessor actually expands the text in the appropriate places before compiling… Preprocessor definitions on the command line 20 Years Ago by ejptccs123 Hi, I need to have my compiler take preprocessor definitions from the command line. How does it differ from normal command line parameter passing (main(int arc, char *argv[])) ? Thanks. Re: Preprocessor definitions on the command line 20 Years Ago by ejptccs123 Thanks for the tip. I'm using Dev-C++. And I got the preprocessor flag to work. Thanks. Re: Preprocessor definitions on the command line 17 Years Ago by paramaguru i need it fast[quote=ejptccs123;63390]Hi, I need to have my compiler take preprocessor definitions from the command line. How does it differ from normal command line parameter passing (main(int arc, char *argv[])) ? Thanks.[/quote] Re: Preprocessor definitions on the command line 17 Years Ago by vijayan121 1. [B]g++ -DHAVE_CONFIG -Wall -std=c++98 -o myprogram[/B] 2. [B],/myprogram hello world[/B] in 1., the command line args are used by the c preprocessor, some are forwarded to the compiler and linker in 2., the command line args are passed to myprogram and are available as parameters passed to main preprocessor uint to unsigned int 16 Years Ago by monkey_king I've made a program using gcc as a compiler. In my loops I've been using a uint type as the type of my loop variable. But now it seems that some systems doesn't support this type. Can I make a preprocessor conditional that does a #define uint to unsigned int if typename uint doesn't exist thanks in advance Re: preprocessor uint to unsigned int 16 Years Ago by WaltP … systems doesn't support this type. Can I make a preprocessor conditional that does a #define uint to unsigned int if… Preprocessor Directives , Help plz .. 14 Years Ago by Rookie09 … .. So , the thing is that i need to define a preprocessor directive so i can compile correctively an SQL pseudocode into… Preprocessor definition concatenation 14 Years Ago by deanus Hi all, Is it possible to define a preprocessor constant using another constant and a string in the declaration, like this: [CODE] #define MAIN_PATH = "C:\\My Documents\\" #define SUB_DIR = MAIN_PATH + "MyFolder\\" [/CODE] I'm using VC++ 2010 Express... Thanks, Dean Re: Preprocessor definition concatenation 14 Years Ago by deanus What I mean is that I know it's not possible to do it the way I coded it because the compiler is defining SUB_DIR to the value of MY_PATH and it's completely ignoring the rest of the line, but is it possible to concatenate 2 preprocessor constants...? If not, is it possible to define an include directory 'in-code', not from a project's settings..? Preprocessor error 13 Years Ago by acechauhan … a keyword or is predefined? Is there some rule about preprocessor directives that I am not familiar with? Preprocessor directives 10 Years Ago by tgreiner … a more generic context. So, I am trying to use preprocessor directives to redefine the class structure for those more generic… Re: Preprocessor directives 10 Years Ago by tgreiner I knew my problem was in my understand of the preprocessor process. What you have stated here clarified where I was misunderstanding things and thus helped me to understand what was going wrong. Thanks. Re: Preprocessor #warning Command Question 16 Years Ago by grumpier … no way to #define a macro that expands to a preprocessor directive. There is also the incidental concern that #warning is… not a standard preprocessor directive. Any C++ compiler will generate an error on an… Re: Preprocessor in C 12 Years Ago by saurabh.mehta.33234 @Adak I dont think so its illegal in C infact the "##" is a valid token pasting operator for preprocessor.The answer to this is that comments are replaced by preprocessor into white spaces before the macros are even seen!! Re: Preprocessor doesn't see my environment variables 13 Years Ago by Narue You're not doing what you think you're doing, which is set a preprocessor symbol during compilation. Try using a compiler switch instead: [code] $(GPP) -D UBUNTU -g -c -o Tester_dbg.o Tester.cpp [/code] Re: Preprocessor in C 12 Years Ago by deceptikon …; The answer to this is that comments are replaced by preprocessor into white spaces before the macros are even seen!! That… Windows software trace preprocessor 15 Years Ago by prasanp … support tools are known as WPP Software Tracing) is a preprocessor that simplifies the use of WMI event tracing to implement… Problem with preprocessor directives 15 Years Ago by skiabox … [/CODE] Here's the errors I get : Error 1 Invalid preprocessor expression D:\UWESA\trunk\source\uwesa_web_CS\Properties\MyExtensions\MyWebExtension.cs… C Preprocessor impossibility? 13 Years Ago by mwjones …[/B] pseudoinstruction, but more accurately a snag using the C preprocessor. I have an array of op codes from which I… C preprocessor concatenation 13 Years Ago by ricardo.crudo Hello Everybody. I'm with a classic problem in C preprocessor concatenation. This is the situation: [CODE] #define BAUDRATE(VAL) (B ## … tilde (~) unary operator in #if preprocessor directive 12 Years Ago by hg_fs2002 Is it possible to use tilde (~) in C preprocess directive in the following way? #define a 1 #if ~a==0 ... #endif Generally, I want to know how we can ~ in preprocessor directives? Re: tilde (~) unary operator in #if preprocessor directive 12 Years Ago by deceptikon Have you tried that code? I mean, a simple test program would have answered your question in far less time than it took for me to notice it and answer. But yes, you can use bitwise NOT in a preprocessor directive.