Regular Expressions 101

Positive Lookbehind(?<= |^)

1st Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative^

^start of line

Group 1(-\S+)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\S+any non-whitespace character, repeated at least once

Positive Lookahead(?= |$)

1st Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative$

$end of line

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+)(?= |$)

New

-Xaa=2000 -tbb:simple   -Xcc-dds -g -c -DC_hh -Xii-ff-file -Xmm-nn -Xkk -o output/gg.o -ee1481 -Xll=0x1000 -I. -I./ss/tt/uu -I./ss/tt/ww /ff/gg/vv.c -I./EIS_CFG/gentool/make -I./testenv