Flex Alternatives

flex reviews and mentions

• Building Zerocalc, part I - rustc lexer and a lexer in rust
  2 projects | dev.to | 1 Jun 2024

  In this post, we will focus on tokenization. There are many ways to do tokenization, including using regular expressions or generating tokenizer code with generators such as flex. But what if we check how rustc's parser does it?

• How to provide input file for Flex++?
  1 project | /r/Compilers | 5 Sep 2023

  I am using Flex++, which is Flex for C++ and I am having trouble setting the input file. Flex++ uses the FlexLexer class provided in FlexLexer.h to create the lexer object(https://github.com/westes/flex/blob/master/src/FlexLexer.h). In my main function I have

• Do Regular Expressions only evaluate one line at a time?
  1 project | /r/perl | 5 Dec 2022

  Further applications of DFA and NFA: lex or flex, yacc or bison, and POE :-)

• Cool C projects
  11 projects | /r/C_Programming | 19 Oct 2022

  How about writing a programming language using Flex and Bison? There are lots of good tutorials and examples out there.

• Parser and Lexer bike-shedding
  4 projects | /r/ProgrammingLanguages | 27 Jul 2022

  Some lexer generators (notably Flex) take input from a file handle by default. While you can always read a file into a string before passing it to the generated lexer, this is not seen as "the best" since you have to read in all the data into memory, which can be a lot.

• A Good Tool for Resuming Parsers?
  2 projects | /r/cpp_questions | 2 Jan 2022

  Ages ago, I loved writing domain-specific toy languages, and almost always used flex to generate lexers and GNU bison to generate the parser. I've begun a new toy project and I don't think those two will cut it this time, so I'm looking for other tools that integrate well with C++.

• Please no
  3 projects | /r/ProgrammerHumor | 22 Nov 2021

  I don't understand :c don't lexers like Flex work off of regex rules? Isn't this the correct first step to parse it?

• A work in progress C compiler from scratch
  6 projects | news.ycombinator.com | 3 Aug 2021

  I wrote a C compiler using flex [1] and bison [2]. The glue between them is a bit hacky.

  At some point ANTLR [3] looked promising, but these days I'd probably write a lexer and recursive descent parser by hand, then generate LLVM IR.

  [1] https://github.com/westes/flex

• Dealing with lex and yacc is DIFFICULT so little information is available about them!
  1 project | /r/CodingHelp | 15 Mar 2021

  github.com/westes/flex/releases

• Qual’è il commento più assurdo che avete mai trovato nel sorgente di un software?
  7 projects | /r/ItalyInformatica | 1 Feb 2021

  Un commento in flex, uno storico software, tanto per mostrare che anche i migliori fanno le cose alla buona.

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