Regexps are useful for validation, extraction and tokenizing. However, they are not as strong at parsing, as you have discovered. Parsing is nontheless possible, using advanced features.

use v5.8.0;  # or higher  # For $^N

our @rv;
our @temp_rv;

/
   (text);
   (?{ local @temp_rv = ( @temp_rv, $^N ) })

   (?:
      (float)
      (?{ local @temp_rv = ( @temp_rv, $^N ) })
      (?:non-num)
   ){4}

   (?{ @rv = @temp_rv })
/x;
[download]

Tested.

• local is needed in case of backtracking.
• @rv = @temp_rv is necessary because @temp_rv will wind back to its original value before the regexp exits.
• Package (our) variables (rather than lexical (my) variables) are needed because the code blocks in the regexp act as closures.

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