Although the compiler doesn't have a separate preprocessor, the directives described in this section are processed as if there were one. You use them to help in conditional compilation. Unlike C and C++ directives, you can't use these directives to create macros. A preprocessor directive must ...
The C preprocessor modifies a source file before handing it over to the compiler, allowing conditional compilation with #ifdef, defining constants with #define, including header files with #include, and using builtin macros such as __FILE__. This page lists the preprocessor directives, or ...
Region and Unregion is new directives. It was not in C and C++ list of directives. I don't know the intention of C# developers to excludes number of directive from C and C++ list but they picked what people use atmost from list of C and C++ directive. Before telling meaning of each ...
The preprocessor directives instruct the compiler how to treat the source code. For example, under certain conditions, you might want the compiler to ignore portions of the code, and under other conditions, you might want that code compiled. The preprocessor directives give you those options and ...
Region and Unregion is new directives. It was not in C and C++ list of directives. I don't know the intention of C# developers to excludes number of directive from C and C++ list but they picked what people use atmost from list of C and C++ directive. Before telling meaning of each...
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 ...
C-preprocessor directives v17 Suggest edits The ECPGPlus C-preprocessor enforces two behaviors that depend on the mode in which you invoke ECPGPlus: PROC mode Non-PROC mode Compiling in PROC mode In PROC mode, ECPGPlus allows you to:...
which would result in 1 * 5 being evaluated before the addition, not after. Oops! It is also possible to write simply #define [identifier name] which defines [identifier name] without giving it a value. This can be useful in conjunction with another set of directives that allow conditional...
10.13Does thesizeofoperator work in preprocessor#ifdirectives? 10.14Can I use an#ifdefin a#defineline, to define something two different ways, like this? #define a b \ #ifdef whatever c d #else e f g #endif 10.15Is there anything like an#ifdeffortypedefs?
LLVM_PREFERRED_TYPE(bool) - unsigned ShowEmbedDirectives : 1; ///< Print embeds, etc. within preprocessed - LLVM_PREFERRED_TYPE(bool) unsigned RewriteIncludes : 1; ///< Preprocess include directives only. LLVM_PREFERRED_TYPE(bool) unsigned RewriteImports : 1; ///< Include contents of ...