Regular Expressions 101

Explanation

Pro

Group 1((?:^|[^\\\n])(?:\\{2})*)

Non-Capturing Group(?:^|[^\\\n])

1st Alternative^

^start of line

2nd Alternative[^\\\n]

Negated Character Class[^\\\n]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

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

Non-Capturing Group(?:\\{2})*

*repeats the group contents below any number of times:

\\{2}the literal \ (92₁₀ / 134₈ / 5C₁₆) , repeated exactly 2 times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 2([#$&])

Character Class[#$&]

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

Group 3([\w.]+)

Character Class[\w.]+

+matches at least one character from the set below:

\wany word character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?::([^}\\]*(?:\\.[^}\\]*)*))?

?repeats the group contents below at most once:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 4([^}\\]*(?:\\.[^}\\]*)*)

Negated Character Class[^}\\]*

*matches any number of characters outside the set below:

}the literal } (125₁₀ / 175₈ / 7D₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\.[^}\\]*)*

*repeats the group contents below any number of times:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

.any character (except for line terminators)

Negated Character Class[^}\\]*

*matches any number of characters outside the set below:

}the literal } (125₁₀ / 175₈ / 7D₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

((?:^|[^\\\n])(?:\\{2})*)\{([#$&])([\w.]+)(?::([^}\\]*(?:\\.[^}\\]*)*))?}

New

{&var} --> Variable stored in a dictionary --> dict("var")
{$prop} --> Property of a class cls.prop read by CallByName and PropGet
{#const} --> Some constant values by name from a function
Value of foo is '{&var:DD.MM.YYYY}' and bar is '{$prop}'
Value of foo is '{&var:DD.{MM}.YYYY}' and bar is '{$prop}'
Value of foo is '{&var:DD.\{MM\}.YYYY}' and bar is '{$prop}'
This should not match '\{&var:DD.\{MM\}.YYYY\}' but this one '{&var:DD.\{MM\}.YYYY}'