Let's Build a Compiler, by Jack Crenshaw

[tsh73]

old compiler tutorial

Let's Build a Compiler, by Jack Crenshaw

This fifteen-part series, written from 1988 to 1995, is a non-technical introduction to compiler construction. You can read the parts on-line or download them in a ZIP file.

compilers.iecc.com/crenshaw/
(probably could be found elsewhere)

I have read it long time ago, and remember it being understandable
but be warned that
1) it is written in TurboPascal 4
2) it produces asembler code for 68000 microprocessor
(not Intel'86)

Now I started actually *do* it (in JB of cource)
It will be separate post referring here.

[cundo]

Doing it in JB? wow

[Rod]

Cool project, so Just BASIC to C?

[tsh73]

Doing it in JB? wowDoing it in JB? wow

Of cource. One should pick language he knows ;)

Anecdotal evidence.
I translated some parsing program from C to JB. No hitch.
I translated it again, to C#. Had troubles handling and-of-stream.
My student worked on some translator. C#, he apparently had troubles handling and-of-stream
(invented using a dot (.) to mark end-of-program. just like in Pascal)
Here in chapter 4 author uses a dot (.) to mark end-of-program.
Then I translated it to JB, I somehow got round it.

Just recently it downed to me:
in C/C#/Pascal, then you go out of string, you get an exception
Ib JB, if you MID$(a$, out_of_string_pos, 1), you just get empty string.
It happened to make lots of difference.

so Just BASIC to C?

I dunno.
Actually I had some JB 2 C code, and it kind of worked.
But it was made without any theory/book, just on a whim
and I just had no idea how to continue - say to add subs/functions.
Probably after working along this book I'll get some ideas.