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author | Rob Landley <rob@landley.net> | 2015-12-13 16:52:26 -0600 |
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committer | Rob Landley <rob@landley.net> | 2015-12-13 16:52:26 -0600 |
commit | f96bb3d8e7ec3882c70b861b998d8573083ffe55 (patch) | |
tree | fdf93b80adb5dcbf23ce68202abe5da6ce6c66b7 /README | |
parent | fc7543b7f63c159d966ca6b71caf17f877eae985 (diff) | |
download | toybox-f96bb3d8e7ec3882c70b861b998d8573083ffe55.tar.gz |
Start of TAGGED_ARRAY() infrastructure.
This lets you have struct arrays with a string as the first member, ala:
struct {char *name; int x, y} blah thingy[] = TAGGED_ARRAY(BLAH,
{"one", 1, 2}, {"two", 3, 4}, {"three", 5, 6}
);
And it produces #defines for the array index of each, ala:
#define BLAH_one 0
#define BLAH_two 1
#define BLAH_three 2
So you can use thingy[BLAH_two].x and still reorder the elements at will.
Note: if you screw up the array initializers, temporarily replace
TAGGED_ARRAY(BLAH, with { and the ); with }; and the compiler will give you
better error messages. (With the macro the compiler reports errors on the
TAGGED_ARRAY line, not where the comma is missing in its contents.)
Currently the TAGGED_ARRAY( and ); must be on their own lines, and the
{ and start of each attached string must be on the same line.
Diffstat (limited to 'README')
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