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  1. #!/usr/bin/perl
  2.  
  3.  
  4. sub process_latex {
  5.     my ($latex) = @_;
  6.     1 while $latex =~ s{
  7.         \\frac
  8.         (\{
  9.             ([^{}]*(?:(?1)[^{}]*)*) # numerator (match balanced braces)
  10.         \})
  11.         (\{
  12.             ([^{}]*(?:(?3)[^{}]*)*) # denominator (match balanced braces)
  13.         \})
  14.     }{
  15.         my ($numerator, $denominator) = ($2, $4);
  16.         $numerator = process_latex($numerator);
  17.         $denominator = process_latex($denominator);
  18.         "($numerator)/($denominator)";
  19.     }gex;
  20.     return $latex;
  21. }
  22.  
  23. print process_latex('\frac{ \frac{1\frac{2}{3}}{4} a{} }{ b{} }')  . "\n";
  24. print process_latex('\frac{\epsilon+\gamma}{2^{-4\epsilon}}')  . "\n";
  25. print process_latex('\frac{\frac{1}{2} \textbf{a}}{b \textit{c}}')  . "\n";
Success #stdin #stdout 0.01s 5360KB
comments (?)
stdin 
Standard input is empty
stdout 
( (1(2)/(3))/(4) a{} )/( b{} )
(\epsilon+\gamma)/(2^{-4\epsilon})
((1)/(2) \textbf{a})/(b \textit{c})
https://ideone.com/3r6xLn
language:
Perl (perl 5.28.1)
created:
2 years ago
visibility:
public

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