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Tip 218 Printable Monobook Previous Next

created 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.

@@ Line 4: / Line 4: @@
 |previous=217
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-|created=February 22, 2002
+|created=2002
 |complexity=advanced
 |author=Mark A. Hillebrand
@@ Line 16: / Line 16: @@
  :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 <tt>Comment</tt> if the cursor is inside of a comment, so
+echoes the group used for '''highlighting''' the character at the current cursor position, see {{help|synIDtrans()}}. It will usually be <code>Comment</code> 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 <tt>names</tt> for comments), if the cursor is inside a comment or not.
+detects, independent of the filetype (which have their own group <code>names</code> for comments), if the cursor is inside a comment or not.
 The expression

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Changes: Check for comments independent of filetype

Latest revision as of 05:19, July 13, 2012

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