regex101: All Strings for same-lines, Syntax or Parsing

1st Alternative(?:\"(?:(?<=\"(?=[^\n]))[^\n]+?(?=(?<!\\))(?=\"))?\")

Non-Capturing Group(?:\"(?:(?<=\"(?=[^\n]))[^\n]+?(?=(?<!\\))(?=\"))?\")

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:(?<=\"(?=[^\n]))[^\n]+?(?=(?<!\\))(?=\"))?

?repeats the group contents below at most once:

Positive Lookbehind(?<=\"(?=[^\n]))

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Positive Lookahead(?=[^\n])

Negated Character Class[^\n]

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

Negated Character Class[^\n]+?

+?matches at least one character outside the set below:

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

Positive Lookahead(?=(?<!\\))

Negative Lookbehind(?<!\\)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Positive Lookahead(?=\")

\"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative(\B'(?:(?<='(?=[^\n]))[^\n]+?(?=(?<!\\))(?='))?')

Group 1(\B'(?:(?<='(?=[^\n]))[^\n]+?(?=(?<!\\))(?='))?')

\Bnot an ASCII word boundary

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Non-Capturing Group(?:(?<='(?=[^\n]))[^\n]+?(?=(?<!\\))(?='))?

?repeats the group contents below at most once:

Positive Lookbehind(?<='(?=[^\n]))

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Positive Lookahead(?=[^\n])

Negated Character Class[^\n]

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

Negated Character Class[^\n]+?

+?matches at least one character outside the set below:

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

Positive Lookahead(?=(?<!\\))

Negative Lookbehind(?<!\\)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Positive Lookahead(?=')

'the literal ' (39₁₀ / 47₈ / 27₁₆)

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

Search reference

Regular Expression

(?:\"(?:(?<=\"(?=[^\n]))[^\n]+?(?=(?<!\\))(?=\"))?\")|(\B'(?:(?<='(?=[^\n]))[^\n]+?(?=(?<!\\))(?='))?')

New


1. Valid double-quoted strings:
   - "Hello"
   - "This is a test"
   - "123"
   - "Special characters: @#$%^&*()_+"
   - "Escape sequence: \n"

2. Valid double-quoted strings with additional characters or variables:
   - " test aaaaa \" " + asdf
   - " test " + ( "aaaaa" ) + gdf
   - " test \" " + `" aaaa " + dfg
   - " test ' aaaaa \" " + dfg
   - ""

3. Valid double-quoted strings with special characters:
   - "sas''as\"a1\'2 ! -_?:sa"
   - "''"
   - "\abnb\ajhgf\crt098& \"'"

4. Invalid double-quoted strings:
   - " test " + ( "aaaaa" )   \"     saf
   - "\\ + \* test " \$ \.         dsdfs
   - (\" test \" " + " aaaa "      sfgd
   - ' test ' + aas ( "aaaaa" ) + '\   sd
   - '\\ + \* test '               \$ \. trace
   - (' test '  as ' + '               aaaa '
   - '""'
   - '"sas'
   - 'ads'
   - 'asdasd\"asdsa'
   - "klkl"klkl
   - "asa\'sasa\\"
   - \'\\\'
   - "hhhh"klkl"
   - 'jkjkjk'klklk'
   - '\"\\\"'
   - ''
   - '\"asa\'sasa\\\"'
   - "sasasasa\\\\\\"



1. Valid single-quoted strings:
   - 'Hello'
   - 'This is a test'
   - '123'
   - 'Special characters: @#$%^&*()_+'
   - 'Escape sequence: \n'

2. Valid single-quoted strings with additional characters or variables:
   - ' test aaaaa \' ' + asdf
   - ' test ' + ( 'aaaaa' ) + gdf
   - ' test \' ' + ' aaaa' + dfg
   - ' test " aaaaa \' ' + dfg
   - ''

3. Valid single-quoted strings with special characters:
   - 'sas""as\'a1\"2 ! -_?:sa'
   - '""'
   - '\abnb\ajhgf\crt098& \'""'

4. Invalid single-quoted strings:
   - ' test ' + ( 'aaaaa' )   \'     saf
   - '\\ + \* test ' \$ \.         dsdfs
   - (\' test \' + ' aaaa '      sfgd
   - " test \" " + " aaaa "      sfgd
   - ' test ' + aas ( 'aaaaa' ) + '\   sd
   - '\\ + \* test '               \$ \. trace
   - (' test '  as ' + '               aaaa '
   - "''"
   - 'sas"
   - "ads'
   - 'asdasd\'asdsa'
   - "klkl"klkl
   - "asa\'sasa\\"
   - \'\\\'
   - 'hhhh"klkl\'\
   - \'jkjkjk"klklk'
   - "\'\\\'"
   - ''
   - '\"asa\'sasa\\\"'
   - 'sasasasa\\\\\\'