Textmate Grammar - Highlight 'STR$' call
I had this regex for capturing some standard lib calls in a TextMate (vs code) grammar:
(?i)\b(sin|cos|tan)\b
Now, in a call like str$(5), I'd like to capture str$. You can't do:
(?i)\b(sin|cos|tan|str\$)\b
Because of the ending word boundary (I think?)
I tried
(?i)\b(sin|cos|tan|str\$)( |\()
But that causes:
Can you capture a word with a special character on the end & word boundaries either side (without "capturing" the actual chars on the boundaries)?
You may use
(?i)\b(sin|cos|tan|str\$)(?!\w)
^^^^^^
Or
(?i)(?<!\w)(sin|cos|tan|str\$)(?!\w)
^^^^^^^ ^^^^^
The (?!\w) is a negative lookahead that will fail the match if, immediately to the right of the current location, there is a letter, digit or an underscore.
The (?<!\w) is a negative lookbehind that will fail the match if, immediately to the left of the current location, there is a letter, digit or an underscore.
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