Regular Expressions 101

Explanation

Pro

^start of line

Non-Capturing Group(?:[\w.]+,{1}(?:STR|INT|REAL){1},{1}(\s*|$))+

+repeats the group contents below at least once:

Character Class[\w.]+

+matches at least one character from the set below:

\wany word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,{1}the literal , (44₁₀ / 54₈ / 2C₁₆) , repeated exactly 1 time

Non-Capturing Group(?:STR|INT|REAL){1}

{1}repeats the group contents below exactly 1 time:

1st AlternativeSTR

STRthe literal text STR (case sensitive)

2nd AlternativeINT

INTthe literal text INT (case sensitive)

3rd AlternativeREAL

REALthe literal text REAL (case sensitive)

,{1}the literal , (44₁₀ / 54₈ / 2C₁₆) , repeated exactly 1 time

Group 1(\s*|$)

1st Alternative\s*

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

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

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25 tokens

^(?:[\w.]+,{1}(?:STR|INT|REAL){1},{1}(\s*|$))+$

There are no unit tests.