Re: Want to get started - would like to write a simple interpreter

On Fri, 1 Nov 1996, Carl D. Cravens wrote:
> I want to write an interpreter for a very simple language. (A personal
> project that you might find silly if I actually told you what it was
> for.) If I wanted to write just a compiler, I'd buy the dragon book ...


John Carter wrote:
>The main trick is to compile to some sort of byte code. This frees you
>from the stark screaming horrors of dealing with real
>assembler. (Fine, I can hack assembler if I have to, but if you just
>writing an interpretor without any loud yelling speed constraints for
>pity sake keep away from real assembler.)


Come to think of it, "The Unix Programming Environment" by Pike and
Kernighan has a nice example on an interpreter built along these
lines. There is a nice introduction on yacc/lex and a complete walk
through as the language evolves (starting out with basic expression
parsing then adding variables and at last functions).


-kim
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