Regular Expressions 101

.*any character (except for line terminators), repeated any number of times

^start of line

Group 1(\S*)

\S*any non-whitespace character, repeated any number of times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 2(\d+)

\d+a digit, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 3(\d+)

\d+a digit, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

.*any character (except for line terminators), repeated any number of times

\na line-feed (newline) character (ASCII 10)

Group 4(.*)

.*any character (except for line terminators), repeated any number of times

.any character (except for line terminators)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

.*^(\S*):(\d+):(\d+):.*\n(.*).

New




/path/to/file.hs:86:22: warning: [-Wname-shadowing]
    This binding for ‘myvar’ shadows the existing binding
      imported from ‘My.Module’ at /path/to/file.hs:29:1-30
      (and originally defined
         at /path/to/file.hs:347:1-5)

Regular Expression

Substitution