![]() Macros are commonly used in C-style programming to define compile-time constant values. ![]() std::vector and other Standard Library containers. The idea is, that everyone can read the software parameter, but only the friends of the class read_and_write_access_manager are allowed to change software parameter. When passing a string to a function that requires only read-only access, in C++17 you can use std::stringview for even greater performance benefit. Some macros are predefined on each kind of machine (see section 3.7.3 System-specific Predefined Macros). A conditional in the C preprocessor resembles in some ways an ifstatement in C, but it is important to understand the difference between them. Macro definitions can vary between compilations for several reasons. arithmetic expressions, or whether a name is defined as a macro, or both simultaneously using the special definedoperator. ![]() In the Macro name list, click Test, and then click Run. One common use of ifndef is to include code only the first time a header file is included. On the Tools menu, point to Macro, and then click Macros. In the Module sheet, type the following code: Sub Test () Documents.Open FileName:'C:\Test.doc', ReadOnly:False End Sub Press ALT+F11 to return to Word. With classes, is there a way to make a variable read-only to the public, but read+write when accessed privately? e.g. Press ALT+F11 to start the Visual Basic editor. I'm trying to educate myself a little more in C++. To put it simply, the preprocessor will only expand a nested macro on the left side (in another macros arguments) if neither the stringification operator nor the concatenation operator are applied to it on the right side (in the macro definition). Whoopee, not working on that socket library for the moment.
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