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# Copy #if DEBUG Console.WriteLine("Debug version"); #endif...
not operator is used. Unlike C and C++, a numeric value to a symbol can't be assigned. The#ifstatement in C# is Boolean and only tests whether the symbol is defined or not. For example, the following code is compiled whenDEBUGis defined:...
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: #define SW...
yes, in some cases, using preprocessor directives can improve code readability. for example, instead of having a long conditional statement in your code, you can use `#ifdef` and `#ifndef` to make it more concise and easier to read. however, care should be taken not to overuse directives...
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 a if statement with one major difference. The if statement is tested during the execution time to check whether a block of code ...
Suppose there is a parameter called "env" defined inoptions.params, statement branching can easily be expressed like: // #!if env === "development"doSomethingA();doSomethingA2();// #!elseif env === "canary"doSomethingB();doSomethingB2();// #!elsedoSomethingC();doSomethingC2();//...
In the default VC++ test projects, I didn't get the option "<different options>" under .xxproj file. Please check the property for your projects. As far as I know, it has the settings for Preprocessor Definitions.https://msdn.microsoft.com/en-us/library/hhzbb5c8.aspx?f=255&MSPPError...
As in C and C++, any numerical value that equals zero is considered "False", and any non-zero value is "True". Ignoring Condition VariablesIf you do not specify a variable's value, then any preprocessor statement that includes that variable is skipped and simply ignored. This is the ...
Suppose there is a parameter called "env" defined inoptions.params, statement branching can easily be expressed like: // #!if env === "development"doSomethingA();doSomethingA2();// #!elseif env === "canary"doSomethingB();doSomethingB2();// #!elsedoSomethingC();doSomethingC2();//...
Placemarker indicates an empty token with nothing in its Value Identifier indicates the token is a valid identifier (maybe macro) Others refers to all other categories which cannot be a macro NOTE only tokens tagged with None or Identifier can be a macro Assumptions for each statement below, we...