[vim/vim] Add support for #elifdef and #elifndef to c.vim (Issue #13667)
Jonathan Wakely
The new C2x and C++23 standards add new preprocessing conditionals, #elifdef and #elifndef
For C the proposal was:
https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2645.pdf
For C++ the proposal was:
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2334r1.pdf
They've been supported by GCC for a couple of years:
https://gcc.gnu.org/gcc-12/changes.html#c
Vim does not recognize these and so doesn't syntax highlight them.
#ifdef foo #elifdef bar #elifndef baz #endif
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Christian Brabandt
can you create a PR to runtime/syntax/c.vim ?
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Jonathan Wakely
Done, but see my comment on #13679 about whether the PR is complete or not.
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S. B. Tam
The matchit plugin also needs to recognize #elifdef and #elifndef.
The built-in [#, ]# and % do not need any change, even though they deal with #if/#else/#endif, because they only look for el and do not care about subsequent characters.
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dkearns
I'll add it to #12984, thanks.
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Christian Brabandt
Closed #13667 as completed via chrisbra/matchit#41.
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Jonathan Wakely
Marvellous, thank you!
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