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Stringification of a macro value

I want to write a C macro that takes a “sequence of characters” (for example, #define macro(sequence)) and return the quoted string "sequence", so the macro should create "\"sequence\"". I know I can do #sequence but this just returns "sequence" which is not what I’m looking for… I must say that "sequence" is another macro, so I can’t write it as it is in this macro since it gets “non literally” replaced. Any ideas?

Answer 1

Use #sequence but add the quotes before and after:

#define macro(sequence) "\"" #sequence "\""

The string literals will be concatenated giving you the result you want.

For example:

#define hello abc
printf("%s\n", macro(hello));

Will print "hello" (including the quotes).