Save string in C preprocessor

Question

We have following macros:

#define START(x) [...]
#define FOO(x, a, b, c) [...]
#define BAR(x, a, b, c) [...]
#define END(x) [...]

We have piece of code:

START(foobar)
FOO  (foobar, 1, 2, 3)
FOO  (foobar, 0.1, 0.2, 0.3)
BAR  (foobar, 2, 3, 4)
END  (foobar)

Can we do something to let START store foobar somewhere? To xform previous into:

START(foobar)
FOO  (1, 2, 3)
FOO  (0.1, 0.2, 0.3)
BAR  (2, 3, 4)
END  ()

(something like #define FOO(x) #define VAR x)

btw, a solution would be to create a global variable, set it in START and utilize it in the FOO/BAR/END macros — KevinDTimm
– KevinDTimm, Commented Jul 28, 2011 at 16:30

user720594 · Accepted Answer · 2011-10-18 13:12:50Z

2

What about:

definition:

#define START() [...VAR...]
#define FOO(a, b, c) [...VAR...]
#define BAR(a, b, c) [...VAR...]
#define END() [...VAR...]

usage:

#define VAR foobar
START()
FOO  (1, 2, 3)
FOO  (0.1, 0.2, 0.3)
BAR  (2, 3, 4)
END  ()
#undef VAR

answered Oct 18, 2011 at 13:12

user720594

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