Operator # (Preprocessor Stringize)
Preprocessor operator to convert macro arguments to strings
#macro_argument
This operator converts the macro_argument into a string whose value is the name of the argument. This substitution is made during the macro expansion, previous to compilation.
Note: because of this feature, care should be taken when using file-handling statements in a macro. Because of potential ambiguity with file-handling statements that take a "#filenum" parameter, if filenum is one of the macro parameters, it may be necessary to wrap the filenum expression in parenthesis (e.g. "#(filenum)"), to separate it from the # sign. Otherwise, filenum will be stringized in the macro.
Output:
Syntax
#macro_argument
Description
This operator converts the macro_argument into a string whose value is the name of the argument. This substitution is made during the macro expansion, previous to compilation.
Note: because of this feature, care should be taken when using file-handling statements in a macro. Because of potential ambiguity with file-handling statements that take a "#filenum" parameter, if filenum is one of the macro parameters, it may be necessary to wrap the filenum expression in parenthesis (e.g. "#(filenum)"), to separate it from the # sign. Otherwise, filenum will be stringized in the macro.
Example
#define SEE(x) Print #x ;" = "; x
Dim variable As Integer, another_one As Integer
variable=1
another_one=2
SEE(variable)
SEE(another_one)
Dim variable As Integer, another_one As Integer
variable=1
another_one=2
SEE(variable)
SEE(another_one)
Output:
variable = 1 another_one = 2
Differences from QB
- New to FreeBASIC
See also
