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| author | Ori Bernstein <ori@eigenstate.org> | 2020-03-17 22:03:25 -0700 |
|---|---|---|
| committer | Ori Bernstein <ori@eigenstate.org> | 2020-03-17 22:03:25 -0700 |
| commit | 37b86df09ff381bcc4f60802d43e57bd9bfcac73 (patch) | |
| tree | 76065637ec0ea0d646ec783c00a156f9702968c7 /sys/src/cmd/aux/kbdfs/kbdfs.c | |
| parent | 52dc943702a8f7815546e76286b153c3813e1db0 (diff) | |
Improve the posix preprocessor.
This fixes token pasting, making it expand when
it should expand, and paste before expansion when
it should paste before expanding.
#define CAT(a, b) a ## b
#define BAR 3
#define FOO CAT(BAR, 3)
FOO
now produces 33, while
#define CAT(a, b) a ## b
#define EOF (-1)
#define NOP(x) x
NOP(CAT(foo, EOF))
CAT(,EOF)
CAT(,)
produces
fooEOF
(-1)
<empty>
respectively.
Diffstat (limited to 'sys/src/cmd/aux/kbdfs/kbdfs.c')
0 files changed, 0 insertions, 0 deletions