Daniel Hahler wrote:

> There's a problem with "langmap" and expression mappings, but also
> normal ones:
> 
>     :inoremap <expr> } "X"
>     :set langmap=+} langnoremap
> 
> This will insert "X" when typing "+" in insert mode, but it should be "+".
> 
> This is caused / not correctly handled by the "|| (p_lnr &&
> typebuf_maplen() == 0 )" condition in the macro:
> 
> #  define LANGMAP_ADJUST(c, condition) \
>     do { \
>       if (*p_langmap \
>               && (condition) \
>               && (!p_lnr || (p_lnr && typebuf_maplen() == 0 )) \
>               && !KeyStuffed \
>               && (c) >= 0) \
>       { \
>           if ((c) < 256) \
>               c = langmap_mapchar[c]; \
>           else \
>               c = langmap_adjust_mb(c); \
>       } \
>     } while (0)
> 
> "typebuf_maplen() == 0" could be written as "typebuf_typed()" btw.
> 
> `:call feedkeys('i+')` works (inserts the "+").
> 
> A fix for this (with tests) is at: 
> https://github.com/blueyed/vim/compare/fix-langmap-in-insmode?expand=1 (and 
> attached).
> 
> I could imagine that this breaks something, but at least no other tests.
> 
> I've noticed this bug with delimitMate: 
> https://github.com/Raimondi/delimitMate/issues/197

Thanks!

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