Perhaps STR would be better named something like ENQUOTE. If you run gcc -E you can see this in the output. Will assign identical values to s1 and s2.
This acts only on the arguments of a macro and replaces the unexpanded argument with the argument enclosed in double quotes. Be ready to update your links.)) operator. The correct term is, of course, stringifaction. (Both terms, incidentally, are equally detestable. Now consider the preprocessor stringize (Which was once called stringification, the links in the documentation have been changed to reflect the revised terminology. This causes a preprocessor warning because abc (unquoted) cannot be concatenated with the preceding string. Which is equivalent to #pragma message "The value of ABC is: " abc #pragma message "The value of ABC is: " ABC The preprocessor can never assume that an unquoted string should be treated as if it were quoted. When there is more than one component to the argument then they must all be strings so that string concatenation can be applied. The message pragma requires an argument that is a quoted string. String concatenation is an example of this special treatment. The preprocessor understands quoted strings and handles them differently from normal text. See: 3.4 Stringification in the gcc online documentation. The value of a macro can then be displayed with: #pragma message "The value of ABC: " XSTR(ABC)
This can be done in GCC using the stringify operator "#", but it requires two stages.
I know that this is a long time after the original query, but this may still be useful.
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