Tag Archives: Python


I’ve reached a huge milestone with BOOL, and it all happened through serendipity! I was creating canonical source examples and hand-compiling them into an off-the-cuff “language” to give me some sense of what the compiler would have to do to generate output. It’s probably the robot in me; when I invent off-the-cuff pseudo-languages to express an idea, I tend to make them very regular, very machine-readable.

This time that got me to thinking, “I bet it would be fairly easy to write a compiler for this stuff!” The figuring out part (the hard part) of the parsing is already done; the code I was generating (as a human compiler) just needed to be assembled.

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Python Actions

Picking up from the previous post, I want to get into the Python binding for Actions in more detail. I’ve got several examples to help demonstrate various aspects of what the parts of the Action object mean. The design appears solid enough to make it official and move on to the next stage.

Speaking of which: huge milestone in the last few days! The bottom line is that, for the first time, I can generate BOOL objects from a higher-level language. Essentially, I wrote a kind of “macro-assembler” that reads a fairly simplistic language and emits (Python) BOOL objects. It’s a major step in bootstrapping the run-time environment objects necessary as well as providing examples for working on the run-time engine!

It rates its own article soon. For now, Actions ala Python:

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BOOL Python Binding

Again the retirement free time, the pleasure of Python, and perhaps it just being the right time, conspire to move the BOOL project forward into new territory. The Reference Implementation is coming along nicely on several fronts. The design of various objects has become solid enough to use in writing bits of code.

In particular, it’s possible to discuss how objects are represented in Python, and it’s possible to start thinking about the code that works with those objects. With the BOOL source definition becoming more stable, it’s also possible to start thinking about compilers. This post introduces these things; in some cases, in some detail.

For dessert, I’ll briefly mention a BOOL XML binding.

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BOOL Reference Implementation

I’m once again having a go at creating a BOOL Reference Implementation. I’ve tried this in code nearly half a dozen times before, and I’ve doodled countless lines of pseudo-code over the years, but I’ve always gotten bogged down in details and unknowns before.

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