Regex: Match all brackets {} that are not in expressions {0} or {1}

Question

The title says all, I am trying to match all { and } but not those included in {0} or {1} .

Ex: {asd } {2} asds}w2{1}

Here, all brackets would match but the last 2.

Answer 1

Edited based on comments:

Here you go:

(?!\{[01]\})\{|(?<!\{[01])\}

Demo

Explanation:

• Match { if what follows is not {0} or {1} .
• Match } if what precedes is not {0 or {1 .

The matches in the following sample are bolded:

{ asd } { 2 } asds } w2{1} { foo } {0} { bar } } { { }

Answer 2

You could try this regex,

(?:\{0\}|\{1\})(*SKIP)(*F)|(?:{|})

DEMO

OR

(?<!0|1)}|{(?!1|0)

DEMO 1 , DEMO 2

Answer 3

You can use negative lookhead based regex :

\{(?![12]\})[^}]*\}

Online regex Demo