z80-in-charm
Cwerg
z80-in-charm | Cwerg | |
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1 | 59 | |
0 | 398 | |
- | - | |
0.0 | 9.6 | |
almost 2 years ago | 8 days ago | |
xBase | Python | |
- | Apache License 2.0 |
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z80-in-charm
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July 2022 monthly "What are you working on?" thread
Then I've dogfooded it some more with an implementation of Z80 in Charm. Some lessons:
Cwerg
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Cwerg: C-like language that can be implemented in 10kLOC
Perhaps these have already been dealt with and I'm missing critical information. If so, my apologies. Great work, in any case.
[1] https://github.com/robertmuth/Cwerg/tree/master/FrontEnd#dis...
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Where can I find resources and guides on how to build compiler backends?
Cwerg has backend that can be used as JIT and is written with readability in mind. Additional documentation can be found here: https://github.com/robertmuth/Cwerg/tree/master/Docs
- Most important language features not touched in the book "Crafting Interpreters"?
- Lack of resources in creating Assemblers from scratch.
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Minimum ISA Capabilities to Support Most (Non-Interactive) Programs?
I defined a basic ISA-like IR for Cwerg. It has unlimited registers and no constraints on immediates.
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How do you design a compiler and a language?
entire compiler front end ast nodes
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Syntax Design
I was also going down the path of bike shedding concrete syntax for my language Cwerg before pulling the plug on that effort and just using s-exprs. I managed to make the s-expr quite succinct by carefully choosing the order of arguments so I can omit optional ones. Also very helpful was to use square brackets for list, e.g. (call fun-name [arg1 arg2]). This simplifies parsing a little bit and is easier on the eye. Here are some Code Examples
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November 2022 monthly "What are you working on?" thread
I am iterating over the languages features for Cwerg's Frontend which aims to be a low level language with about the complexity of C but with some of the comforts of modern languages. I am especially happy with the choice of adding sum types. Relative to C the current feature set looks like this: Removed: * arrays decay to pointers * bitfields * separate compilation (more of a backend issue) * pre-processor * varargs * implcit type conversions * (untagged) unions * ++/-- * comma operator * implicitly nullable pointers * goto
- typed asts and codegen
- Features Compendium
What are some alternatives?
cane - A small MIDI sequencer DSL designed around vectors and euclidean rhythms
mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
Forth-in-Charm - An implementation of Forth in the Charm scripting language.
tinycc - Unofficial mirror of mob development branch
cognate - A human readable quasi-concatenative programming language
asmjit - Low-latency machine code generation
xvm - Ecstasy and XVM
bluebird - A work-in-progess programming language modeled after Ada and C++
peridot - A fast functional language based on two level type theory
asmdb - Instructions database and utilities for X86/X64 and ARM (THUMB/A32/A64) architectures.
ric-script - A modern scripting language; implemented in old school C, yacc & flex
boring-lang - A very boring programming language