Regular Expressions 101

Group 1(TRACE(\s*)\(\S+\s*[,](\s*\S+\s*)[,\n](\s*\S+\s*)[,](\s*))

TRACEthe literal text TRACE (case sensitive)

Group 2(\s*)

\s*a Unicode whitespace character, repeated any number of times

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\S+any character that is not Unicode whitespace, repeated at least once

\s*a Unicode whitespace character, repeated any number of times

Character Class[,]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 3(\s*\S+\s*)

\s*a Unicode whitespace character, repeated any number of times

\S+any character that is not Unicode whitespace, repeated at least once

\s*a Unicode whitespace character, repeated any number of times

Character Class[,\n]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Group 4(\s*\S+\s*)

\s*a Unicode whitespace character, repeated any number of times

\S+any character that is not Unicode whitespace, repeated at least once

\s*a Unicode whitespace character, repeated any number of times

Character Class[,]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 5(\s*)

\s*a Unicode whitespace character, repeated any number of times

Group 6([^\"])

Negated Character Class[^\"]

\"the literal " (34₁₀ / 42₈ / 22₁₆)

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

(TRACE(\s*)\(\S+\s*[,](\s*\S+\s*)[,\n](\s*\S+\s*)[,](\s*))([^\"])

TRACE(&logger_mr , DEBUG_2 , NULL ,
               UdpPathMgmtLogger::entranceStr_sc;

\1 "%s" \6