Vim and clang_complete, how to explicitly request to reparse my code

Question

I use Vim with clang_complete for omnicompletion.

The plugin is automatically triggered when I need completion, e.g., after I type . or -> to access an object members or methods (see screenshot below).

The plugin works really nice, however I would need a way to trigger it manually (i.e. to compile my code for syntax checking).

This is useful for two reasons:

1. Static syntax checking
2. Clear previous errors which have been fixed (which otherwise will remain in their buffer). See the two screenshots below for a better understanding.

Any help is appreciated. Thanks.

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Screenshot 1

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Screenshot 2

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Answer 1

From the clang_complete docs:

        *clang_complete-periodic_quickfix*
        *g:clang_periodic_quickfix*
If equal to 1, it will periodically update the quickfix window.
Default: 0
Note: You could use the g:ClangUpdateQuickFix() to do the same with a mapping.

If you set this variable to 1, it would update the quickfix window periodically, (and) or you could create a mapping thus:

nmap <leader>uq :call g:ClangUpdateQuickFix()

so that \uq would cause the update. (of course, using YOUR leader mapping, naturally)

Answer 2

If you're looking for syntax checking on the fly, I suggest you have a look at syntastic, which basically runs g++ --fsyntaxonly on your code and marks the errors on your buffer. You can also configure it to use clang!