regex101: PCRE (Legacy) Match Workspace

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

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

*repeats the group contents below any number of times:

1st Alternative(?:\{(?:(?:\{(?:[^{}])*\})|(?:[^{}]))*\})

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

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

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

*repeats the group contents below any number of times:

1st Alternative(?:\{(?:[^{}])*\})

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

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

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

*repeats the group contents below any number of times:

Negated Character Class[^{}]

{the literal { (123₁₀ / 173₈ / 7B₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

2nd Alternative(?:[^{}])

Non-Capturing Group(?:[^{}])

Negated Character Class[^{}]

{the literal { (123₁₀ / 173₈ / 7B₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

2nd Alternative(?:[^{}])

Non-Capturing Group(?:[^{}])

Negated Character Class[^{}]

{the literal { (123₁₀ / 173₈ / 7B₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Global pattern flags

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

25 tokens

Regular Expression

\{(?:(?:\{(?:(?:\{(?:[^{}])*\})|(?:[^{}]))*\})|(?:[^{}]))*\}

New

captures up to singly-nested blocks:
    p{1} = \{(?:[^{}])*\}


int main() {

  return 0;

}

captures up to doubly-nested:
    p{2} = \{(?:(?:p{1})|(?:[^{}]))*\}
      ...or...
    p{2} = \{(?:(?:\{(?:[^{}])*\})|(?:[^{}]))*\}

void more_complex_fxn(int z) {
  int x = z / 9;
  if (x > 3) {
    do_something;
    x += 5;
  }

}

Following the pattern set above...

up to triply-nested:
    p{3} = \{(?:(?:p{2})|(?:[^{}]))*\}
      ...or...
    p{3} = \{(?:(?:\{(?:(?:\{(?:[^{}])*\})|(?:[^{}]))*\})|(?:[^{}]))*\}

double so_many_blocks(double x) {
  double y = x;
  while(y > 4) {
    if (y < 6) {
      y -= 0.3;
    } else {
      y -= 0.5;
    }
  }
  return y;
}