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Talk:Compiler/lexical analyzer: Difference between revisions
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Wow! I '''really''' like your Perl solution. I don't understand much of it, but what I do understand is really cool.
--[[User:Ed Davis|Ed Davis]] ([[User talk:Ed Davis|talk]]) 10:28, 18 August 2016 (UTC)
: Thanks! :) I tried to be clever and dynamically construct a single regex (with one branch per token) to act as the scanner, since it's safe to assume that the Perl regex engine is more bug-free and better optimized than a <code>substr</code>-based scanner that I could have written by hand. But then I realized that there's no easy way to get the line and column number of a regex match, so I had to scan and accumulate those separately, which introduced overhead again. I wonder if the approach was still worth it, performance-wise. Not that a solution in an interpreted language like Perl could ever compete with the C solution, but it might be interesting to benchmark it against the Python solution for large input files... --[[User:Smls|Smls]] ([[User talk:Smls|talk]]) 17:06, 18 August 2016 (UTC)
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