Wait, so you can write an entire language grammar in Haskell like that?! I once wrote a compiler in java, and I ended up just using ANTLR to generate the syntax tree (and a huge string of If statements to clean up that tree). This would have been a lot more fun to work with.
I understand you can do the same in OCaml and F#, they say ML languages are well suited for compiler construction for that. I've been playing with yacc-like Java parser generators and that seems such a time saver compared to a Java class hierarchy.
Edit: you still have to define production rules though, just like in Yacc.
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Wait, so you can write an entire language grammar in Haskell like that?! I once wrote a compiler in java, and I ended up just using ANTLR to generate the syntax tree (and a huge string of If statements to clean up that tree). This would have been a lot more fun to work with.
Yes it's from the parser generator example
haskell.org/happy/doc/html/sec-usi...
I understand you can do the same in OCaml and F#, they say ML languages are well suited for compiler construction for that. I've been playing with yacc-like Java parser generators and that seems such a time saver compared to a Java class hierarchy.
Edit: you still have to define production rules though, just like in Yacc.