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Re^5: Writing a Programming Language in Perl

by ikegami (Pope)
on Oct 25, 2011 at 22:32 UTC ( #933723=note: print w/ replies, xml ) Need Help??


in reply to Re^4: Writing a Programming Language in Perl
in thread Writing a Programming Language in Perl

You need to be able to parse the code before you can compile or execute it. It helps you by creating the parser for you.


Comment on Re^5: Writing a Programming Language in Perl
Re^6: Writing a Programming Language in Perl
by programmer99 (Novice) on Oct 25, 2011 at 22:56 UTC
    So the parsed code goes through a compiler? And then it is executed?

      A compiler (or interpreter) has a few parts.

      A parser converts a file full of source code into a data structure.

      An interpreter traverses that data structure and executes the appropriate commands for each significant node in the structure.

      A compiler transforms that data structure and emits something else. Perhaps this other is object code for a specific processor or perhaps it's binary code for a virtual machine or perhaps it's source code for another language entirely.

      If you look at compiling and implementing languages this way, you already know the general technique. (everything is a compiler).


      Improve your skills with Modern Perl: the free book.

        So what code is needed to start what I am trying to do?

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