Is there any difference in functionality between these two types of complete-functions in Vimscript?
Is there any difference in functionality between these two types of complete-functions in Vimscript?
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Is there any difference in functionality between these two types of complete-functions in Vimscript?
Technically, there is no difference in implementation of both
User-defined completion (see
:help compl-function,:help 'completefunc') and Omni completion (see:help compl-omni,:help 'omnifunc'). Both of them work by calling a function of specialsemantics that locates the start of the expression to be completed at
the current position, and provides appropriate completion suggestions
(see
:help complete-functions).Where the difference between these two types of completion manifests
itself, is the purpose of completion. User-defined completion should
be customized by the user themselves according to conditions specific
to a particular completion idea. Omni completion is supposed to be
filetype-specific. Hence, separate Omni completion functions for
different filetypes are loaded automatically by Vim from
autoload/‹ft›complete.vimfiles, where‹ft›stands for aparticular filetype. See those Omni completion files for C or Python
filetypes as a reference.