Syntax Highlighting in FlowDocumentControl for RScript

Question

We have use the following Regex function to highlight the string and numeric

String Regex function

public string StringRegEx
{
    get { return @"@?""""|@?"".*?(?!\\).""|''|'.*?(?!\\).'"; }
}

Numeric Regex function

public string NumberRegEX
{
    get { return @"[0-9].*?(?=:[0-9]*)?"; }
}

while using this regex function we have face some issues for highlighting string contains numeric

p1 = 1
p2 = 0.2

enter image description here

In this example, 1 and 2 in p1 and p2 also highlighted. How to skip the number highlighted along with the string?

Your string regex contains `.` which matches all.You can use `[A-Za-z]` — vks, Oct 14 '14 at 07:04
p1 and p2 are not matched by the first regex (which is used to match string literal - it is bugged, though). It is only matched by the second regex. Your regex are very poor, btw. — nhahtdh, Oct 14 '14 at 07:14

score 0 · Answer 1 · edited May 23 '17 at 12:05

For a more general approach on how to properly catch things when dealing with a programming language snippet, take a look here.

Your problem might not be "comments in strings, strings in comments" but it is similar, namely "letters in a string that started with a number, numbers in a string that started with a letter" so you'll need a similar approach with pipe-separated regexes for the different matches you wanna have.

A more thorough explanation of this design-pattern is given here.

Syntax Highlighting in FlowDocumentControl for RScript

1 Answers1