not operator is used. Unlike C and C++, a numeric value to a symbol can't be assigned. The #if statement in C# is Boolean and only tests whether the symbol is defined or not. For example, the following code is compiled when DEBUG is defined:C#...
not operator is used. Unlike C and C++, a numeric value to a symbol can't be assigned. The #if statement in C# is Boolean and only tests whether the symbol has been defined or not. For example, the following code is compiled when DEBUG is defined:C#...
In C programming, you can instruct the preprocessor whether to include a block of code or not. To do so, conditional directives can be used. It's similar to aifstatement with one major difference. Theifstatement is tested during the execution time to check whether a block of code should ...
In C, for example, it is standard practice to use a number of standard libraries. These libraries define a series of functions that provide standard functionality. To import these libraries the “#include” keyword is used followed by a library name. The preprocessor searches through the code f...
When SWAP is expanded in the second example, only the first statement, a ^= b, is governed by the conditional; the other two statements will always execute. What we really meant was that all of the statements should be grouped together, which we can enforce using curly braces: ...
Rewrite->Process(SM.getMainFileID(), SrcMgr::C_User); OS->flush(); } 开发者ID:KeeganRen,项目名称:clang,代码行数:27,代码来源:InclusionRewriter.cpp 示例11: handleList ▲点赞 1▼ boolOMPPragmaHandler::handleList(Token &Tok, Preprocessor &PP, ...
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It is also possible to use CComment to add a comment to an include statement. In[5]:=Out[5]= Defining Macros You can define a macro using CDefine. First, you need to load the package. In[1]:= Now you can define a macro. ...
It is a list of strings each of which is a regular #include statement. The file is processed as if these include statements appeared at the beginning. "attributeMap" specifies the behaviour of the __has_cpp_attributes function. It is a string-string map, eg attributeMap["nodiscard"] = ...
In the code above, OneMethod is compiled as conditionally dependent upon the presence of the DEBUG symbol. If we remove the DEBUG symbol, the statement is not compiled. Preprocessor symbols can be defined within a source file, and they can be passed to the compiler with the /define:symbol ...