regex101: .NET 10.0 (C#) Substitution Workspace

Comment: (1 start)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

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

Non-Capturing Group(?: File | Fichier | Image )

1st Alternative File

File the literal text File (case sensitive)

2nd Alternative Fichier

Fichier the literal text Fichier (case sensitive)

3rd Alternative Image

Image the literal text Image (case sensitive)

: the literal text :

Negated Character Class[^|]+

+matches at least one character outside the set below:

|the literal | (124₁₀ / 174₈ / 7C₁₆)

Non-Capturing Group(?: (?> (?: \[ (?> [^\[\]]+ | \[ (?<Depth_1> ) #_(3) | \] (?<-Depth_1> ) )* (?(Depth_1) (?!) ) \] ) | (?! \] \] ) . ) )*?

*?repeats the group contents below any number of times:

Atomic Group(?> (?: \[ (?> [^\[\]]+ | \[ (?<Depth_1> ) #_(3) | \] (?<-Depth_1> ) )* (?(Depth_1) (?!) ) \] ) | (?! \] \] ) . )

1st Alternative (?: \[ (?> [^\[\]]+ | \[ (?<Depth_1> ) #_(3) | \] (?<-Depth_1> ) )* (?(Depth_1) (?!) ) \] )

Non-Capturing Group(?: \[ (?> [^\[\]]+ | \[ (?<Depth_1> ) #_(3) | \] (?<-Depth_1> ) )* (?(Depth_1) (?!) ) \] )

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Atomic Group(?> [^\[\]]+ | \[ (?<Depth_1> ) #_(3) | \] (?<-Depth_1> ) )*

*repeats the group contents below any number of times:

1st Alternative [^\[\]]+

Negated Character Class[^\[\]]+

+matches at least one character outside the set below:

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative \[ (?<Depth_1> ) #_(3)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Group Depth_1(?<Depth_1> ) — does not consume characters

Comment: _(3)

3rd Alternative \] (?<-Depth_1> )

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Balancing Group(?<-Depth_1> ) — does not consume characters

Condition(?(Depth_1) (?!) )

Uses the first branch if group Depth_1 matched

If the condition is true, match this branch: (?!)

Negative Lookahead(?!) — always fails to match

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

2nd Alternative (?! \] \] ) .

Negative Lookahead(?! \] \] )

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

.any Unicode character (except for line terminators)

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

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

1st Alternative bas

bas the literal text bas (case sensitive)

2nd Alternative bas-texte

bas-texte the literal text bas-texte (case sensitive)

3rd Alternative bas-txt

bas-txt the literal text bas-txt (case sensitive)

4th Alternative base

base the literal text base (case sensitive)

5th Alternative baseline

6th Alternative border

7th Alternative bordure

8th Alternative bottom

9th Alternative cadre

10th Alternative center

11th Alternative centre

12th Alternative centré

13th Alternative droite

14th Alternative encadre

15th Alternative encadré

16th Alternative enframed

17th Alternative exp

18th Alternative exposant

19th Alternative frame

20th Alternative framed

21st Alternative frameless

22nd Alternative gauche

23rd Alternative haut

24th Alternative haut-texte

25th Alternative haut-txt

26th Alternative ind

27th Alternative indice

28th Alternative left

29th Alternative ligne-de-base

30th Alternative middle

31st Alternative milieu

32nd Alternative neant

33rd Alternative non_encadre

34th Alternative non_encadré

35th Alternative none

36th Alternative néant

37th Alternative redresse

38th Alternative right

39th Alternative sans_cadre

40th Alternative sub

41st Alternative sup

42nd Alternative super

43rd Alternative text-bottom

44th Alternative text-top

45th Alternative thumb

46th Alternative thumbnail

47th Alternative top

48th Alternative upright

49th Alternative vignette

50th Alternative \b .* \s* px

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

Comment: (1 end)

Group 3( # (2 start) (?: (?> (?: \[ (?> [^\[\]]+ | \[ (?<Depth_2> ) #_(4) | \] (?<-Depth_2> ) )* (?(Depth_2) (?!) ) \] ) | (?! \s* \. \s* (?: \| | [\[\]] ) ) . ) )*? (?= (?: \| | \] \] ) ) )

Comment: (2 end)

Global pattern flags

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Search reference

Regular Expression

 (                             # (1 start)
    \[ \[ \s* 
    (?: File | Fichier | Image )
    : [^|]+ 
    (?=
       (?:
          (?>
             (?:
                \[ 
                (?>
                   [^\[\]]+ 
                 | \[ 
                   (?<Depth_1> )                 #_(3)         
                 | \] 
                   (?<-Depth_1> )
                )*
                (?(Depth_1)
                   (?!)
                )
                \] 
             )
           | (?! \] \] )
             . 
          )
       )*?
       \| \s* 
       (?:
          bas
        | bas-texte
        | bas-txt
        | base
        | baseline
        | border
        | bordure
        | bottom
        | cadre
        | center
        | centre
        | centré
        | droite
        | encadre
        | encadré
        | enframed
        | exp
        | exposant
        | frame
        | framed
        | frameless
        | gauche
        | haut
        | haut-texte
        | haut-txt
        | ind
        | indice
        | left
        | ligne-de-base
        | middle
        | milieu
        | neant
        | non_encadre
        | non_encadré
        | none
        | néant
        | redresse
        | right
        | sans_cadre
        | sub
        | sup
        | super
        | text-bottom
        | text-top
        | thumb
        | thumbnail
        | top
        | upright
        | vignette
        | \b .* \s* px
        | (?:
             alt=
           | classe=
           | class=
           | langue=
           | lang=
           | lien=
           | link=
           | lossy=
           | page=
           | vignette=
           | thumbnail=
           | thumb=
           | redresse=
           | redresse_
           | upright=
           | page [ ] 
           | upright [ ] 
          )
          \s* 
          (?: \b .* \b | [^|]* )
       )
    )
    (?>
       (?:
          \| \s* 
          (?:
             bas
           | bas-texte
           | bas-txt
           | base
           | baseline
           | border
           | bordure
           | bottom
           | cadre
           | center
           | centre
           | centré
           | droite
           | encadre
           | encadré
           | enframed
           | exp
           | exposant
           | frame
           | framed
           | frameless
           | gauche
           | haut
           | haut-texte
           | haut-txt
           | ind
           | indice
           | left
           | ligne-de-base
           | middle
           | milieu
           | neant
           | non_encadre
           | non_encadré
           | none
           | néant
           | redresse
           | right
           | sans_cadre
           | sub
           | sup
           | super
           | text-bottom
           | text-top
           | thumb
           | thumbnail
           | top
           | upright
           | vignette
           | \b .* \s* px
           | (?:
                alt=
              | classe=
              | class=
              | langue=
              | lang=
              | lien=
              | link=
              | lossy=
              | page=
              | vignette=
              | thumbnail=
              | thumb=
              | redresse=
              | redresse_
              | upright=
              | page [ ] 
              | upright [ ] 
             )
             \s* 
             (?: \b .* \b | [^|]* )
          )
          \s* 
       )*
    )
    \| 
 )                             # (1 end)
 (                             # (2 start)
    (?:
       (?>
          (?:
             \[ 
             (?>
                [^\[\]]+ 
              | \[ 
                (?<Depth_2> )                 #_(4)         
              | \] 
                (?<-Depth_2> )
             )*
             (?(Depth_2)
                (?!)
             )
             \] 
          )
        | (?!
             \s* \. \s* 
             (?: \| | [\[\]] )
          )
          . 
       )
    )*?
    (?=
       (?: \| | \] \] )
    )
 )                             # (2 end)

New

Match:
[[File:example.jpg|thumb|Caption]] (simplest syntax)
[[Fichier:example.png| Caption | vignette ]] (French parameters)
[[ Image:example.svg | vignette| This is a Caption |link= Example |upright    0.5 ]] (superfluous spaces, caption is not the last parameter)
[[ Image:example.svg | vignette| This [[is]] a [[Caption]] .|link= Example |upright    0.5 ]] (superfluous spaces, caption is not the last parameter, links, no full stop)


[[ Image:example.svg | vignette| This [[is]] a [[Caption]] |link= Example |upright    0.5 ]] (pass)
[[ Image:example.svg | This [[is]] a [[Caption]] | vignette|link= Example |upright    0.5 ]] (pass)
[[ Image:example.svg | This [[is]] a [[Caption]]. | vignette|link= Example |upright    0.5 ]] (fail)




False positive:
[[Fichier:example.png| Caption ]] (not a thumbnail)

Do not match:
[[File:example.jpg|thumb|Caption.]] (simplest syntax)
[[Fichier:example.png|Caption. |vignette]] (French parameters)
[[ Image:example.svg | vignette| This is a Caption. |link= Example |upright    0.5 ]] (superfluous spaces, caption is not the last parameter)
[[ Image:example.svg | vignette| This [[is]] a [[Caption]] .|link= Example |upright    0.5 ]] (superfluous spaces, caption is not the last parameter, links, no full stop)

Substitution

$1$2.