The C preprocessor is a macro preprocessor (allows you to define macros) that transforms your program before it is compiled. These transformations can be the inclusion of header files, macro expansions, etc. All
C语言的预处理器(Preprocessor)理论上是编译的第一步,通过预处理器来提供了一些特性,例如宏、使用##串联参数、条件包含(Conditional Inclusion)等。 宏替换(Macro Substitution) C语言在预处理器中提供了宏替换(Macro Substitution)的使用。宏的作用域是从#define到文件结束。宏最简单的定义格式如下: #define name ...
HideSet prevent T from duplicate expansion of the same macro Tag is defined below:{ None, Placemarker, Identifier, Others }where: None indicates the token is the concatenation of two and its category not yet determined Placemarker indicates an empty token with nothing in its Value Identifier in...
The # and ## preprocessor operators are available in C++ and ANSI/ISO C. The # operator causes a replacement-text token to be converted to a string surrounded by quotes. Consider the following macro definition −Open Compiler #include <iostream> using namespace std; #define MKSTR( x ) ...
Here, we are going to learn how to define macros –In this example, we are defining two Macros YES and NO by using #define preprocessor directive.
C / ANSI-C Macro Preprocessor Macro Function Define Macro as simple function #include <stdio.h> #define SUM(i, j) ((i)+(j)) int main(void) { int sum; sum = SUM(10, 20); printf("%d", sum); return 0; } Related examples in the same category...
Introduce or expose a memory leak and UB, see llvm/llvm-project#68620 Patch is 185.50 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/95299.diff 96 Files Affected: (modified) clang-tools-extra/test/pp-trace/pp-trace-macro.cpp (-9) (modified...
The Maple Preprocessor Calling Sequence Parameters Description Compatibility Calling Sequence $include fileName $include fileName $define macroName macroDefinition $define macroName ( macroParameters ) macroDefinition $undef macroName $ifdef macroNa
while $i!=0 :arg=$arg and i=$i; !$i = $i - 1 !endwhile !$arg = $arg - 1 !endwhile :procedure end; !endprocedure start $foo(2) end @enduml [改编自QA-10838] While循环(在Mindmap图上)。@startmindmap !procedure $foo($arg) !while $arg!=0 !$i=3 **[#palegreen] arg...
Four preprocessor-specific operators are used in the context of the #define directive. See the following table for a summary of each. The stringizing, charizing, and token-pasting operators are discussed in the next three sections. For information on the defined operator, see The #if, #elif...