flex VS build-your-own-x

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

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

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

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.

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++.

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?

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

github.com/westes/flex/releases

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

View on GitHub

✅ codecrafters-io/build-your-own-x : https://github.com/codecrafters-io/build-your-own-x

8) Build Your Own X: Unleash your inner inventor and embark on a journey of self-creation with this collection of project ideas for building your own software, tools, and even operating systems. Fuel your entrepreneurial spirit and learn valuable engineering principles by bringing your innovative ideas to life. (https://github.com/codecrafters-io/build-your-own-x)

Also if we can someone merge this level of detail/guidance with the projects on https://codecrafters.io/, i would easily pay for something like that.

Build your own X is another useful resource for a curious mind.

This is what you're looking for: Build your own X!