Re: Writing an interpreter

Arne Evertsson wrote:
> Which is easier:
>
> * Write a compiler that produces p-code, and find an existing p-code
> interpreter.
> * Write my own interpreter


IMHO writing a p-code compiler & P-code interp is easier to program.
Also you get a slight advantage when porting your code to another
platform. (your binaries may still work if you write your output
in a big/little endian-independant manner)


Okay, there is a published pascal/p-code interpreter by wirth
(or at least based on his work). Sorry cannot remember the URL
but I could email it to you, if you want it (needs porting work).
It itself is written in Pascal so you need to 'bootstap' it.


It is in two parts:


pint, and pcomp


pascal_code --> pcomp --> p_code


p_code ------> pint [runs the program]




Regards


Simon
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