Check for comments independent of filetype
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Tip 218 Previous Next Created: February 22, 2002 Complexity: advanced Author: Mark A. Hillebrand Version: 6.0
For some scripts it might be useful to detect, whether a specific position in a buffer is inside of a comment or not. Syntax highlighting can save us the work for parsing the comments ourselves. The command
:echo synIDattr(synIDtrans(synID(line("."), col("."), 0)), "name")
echoes the group used for highlighting the character at the current cursor position, see :help synIDtrans(). It will usually be Comment if the cursor is inside of a comment, so
synIDattr(synIDtrans(synID(line("."), col("."), 0)), "name") == "Comment"
detects, independent of the filetype (which have their own group names for comments), if the cursor is inside a comment or not.
The expression
synIDattr(synIDtrans(synID(line("."), col("."), 0)), "name") =~ 'Comment\|Constant\|PreProc'
will detect additionally, if the cursor is inside of a string or some preprocessor statement.
