regex101: WKT LineString

^start of string

Definition Group(?(DEFINE)(?'longitude'[-+]?(?|180(?>\.0+)?|(?>1[0-7]\d|[1-9]?\d)(?>\.\d+)?))(?'latitude'[-+]?(?|90(?>\.0+)?|[1-8]?\d(?>\.\d+)?)))

Group longitude(?'longitude'[-+]?(?|180(?>\.0+)?|(?>1[0-7]\d|[1-9]?\d)(?>\.\d+)?))

Character Class[-+]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

Branch Reset Group(?|180(?>\.0+)?|(?>1[0-7]\d|[1-9]?\d)(?>\.\d+)?)

1st Alternative180(?>\.0+)?

180the literal text 180

Atomic Group(?>\.0+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

2nd Alternative(?>1[0-7]\d|[1-9]?\d)(?>\.\d+)?

Atomic Group(?>1[0-7]\d|[1-9]?\d)

1st Alternative1[0-7]\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-7]

0-7one character from 0 (48₁₀) to 7 (55₁₀)

\da digit

2nd Alternative[1-9]?\d

Character Class[1-9]?

?matches at most one character from the set below:

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\da digit

Atomic Group(?>\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Group latitude(?'latitude'[-+]?(?|90(?>\.0+)?|[1-8]?\d(?>\.\d+)?))

Character Class[-+]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

Branch Reset Group(?|90(?>\.0+)?|[1-8]?\d(?>\.\d+)?)

1st Alternative90(?>\.0+)?

90the literal text 90

Atomic Group(?>\.0+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0+the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated at least once

2nd Alternative[1-8]?\d(?>\.\d+)?

Character Class[1-8]?

?matches at most one character from the set below:

1-8one character from 1 (49₁₀) to 8 (56₁₀)

\da digit

Atomic Group(?>\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

LINESTRINGthe literal text LINESTRING (case sensitive)

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

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Atomic Group(?>(?:(?(?<=\()(?>\s*)|(?>\s*,\s*))(?P>longitude)(?>\s*)(?P>latitude)\s*){2,})

Non-Capturing Group(?:(?(?<=\()(?>\s*)|(?>\s*,\s*))(?P>longitude)(?>\s*)(?P>latitude)\s*){2,}

{2,}repeats the group contents below at least 2 times:

Condition(?(?<=\()(?>\s*)|(?>\s*,\s*))

Uses the first branch if the lookaround matches

Positive Lookbehind(?<=\()

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

If the condition is true, match this branch:(?>\s*)

Otherwise, match this branch:(?>\s*,\s*)

(?P>longitude)calls group longitude as a subroutine

Atomic Group(?>\s*)

(?P>latitude)calls group latitude as a subroutine

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

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

$end of string, or before its final line terminator

Search reference

Regular Expression

^(?(DEFINE)(?'longitude'[-+]?(?|180(?>\.0+)?|(?>1[0-7]\d|[1-9]?\d)(?>\.\d+)?))(?'latitude'[-+]?(?|90(?>\.0+)?|[1-8]?\d(?>\.\d+)?)))LINESTRING\s*\((?>(?:(?(?<=\()(?>\s*)|(?>\s*,\s*))(?P>longitude)(?>\s*)(?P>latitude)\s*){2,})\)$

Unit Tests

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