[l2h] l2h new error

Shigeharu TAKENO shige at iee.niit.ac.jp
Fri Jul 13 05:23:18 CEST 2018

shige 07/13 2018

Ernesto Cuadros Vargas wrote:
| I just have a new error trying to run latex2html:
| ;..,.Unescaped left brace in regex is illegal here in regex; marked by <--
| HERE in m/(\\labelitemi|"" . eval($enum{ <-- HERE "theenumi"})."\)")/ at
| /usr/bin/latex2html line 11325.
| it is inside function sub do_env_enumerate
| I am using Ubuntu 18.04.

This is because of the change of handling of recent perl for 
braces in regular expression.

Well, I think you are using enumerate package. Current l2h may 
have several problem for the handling of enumerate package.

1) Option 'A' of enumerate environment uses "alph", not "Alph"
  (it is a bug of sub Alph():   &falph   ->   &fAlph)

2) "eval($enum{..." string is included in regular expressions
 (we can avoid it to modify
      if ($standard_label) {
          $item =~ s/(\\labelitem$rlevel|$standard_label)/$enum_label/g
      if ($standard_label && $standard_label !~ /eval\(/) {
          $item =~ s/(\\labelitem$rlevel|$standard_label)/$enum_label/g

3) The option are analyzed by the regex "$enum_label_rx", which 
  includes braces { and }. But the braces in options string are 
  modified to <<[n]>> before using "$enum_label_rx". Then, the 
  escape by {, } are not recognized correctly.

4) The regex "$enum_label_rx" supposes that the option must have
  a character [AaIi1].

I will consider the solution for problems 3) and 4).

 Shigeharu TAKENO     NIigata Institute of Technology
                       kashiwazaki,Niigata 945-1195 JAPAN
 shige at iee.niit.ac.jp   TEL(&FAX): +81-257-22-8161

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