Cwerg
bluebird
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Cwerg | bluebird | |
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59 | 11 | |
396 | 25 | |
- | - | |
9.7 | 0.0 | |
12 days ago | over 1 year ago | |
Python | C++ | |
Apache License 2.0 | GNU Affero General Public License v3.0 |
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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
bluebird
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Asking for opinions on the best way to specify an exclusive range in a for-loop
0 upto n and 0 thru n. I think I saw it in Bluebird first and really liked it.
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Tips for implementing an AST
Instead of the classic visitor pattern, I found it easier to create a class that basically wraps a big switch statement that switches on an enum representing the kind of expression. You pass it an expression, and based on the enum returned by its kind() function you downcast the expression into the subclass you need. The code is here for reference. My AST code is here.
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January 2022 monthly "What are you working on?" thread
I am working some again on my Ada-like language bluebird. I am making another attempt to use MLIR as an intermediate IR between the AST and LLVM IR (I made a brief attempt a few months ago just to look into it).
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September 2021 monthly "What are you working on?" thread
I fworked some more towards adding pointers on my Ada-like programming language bluebird. I've finished adding pointer types and variables (as well as the operators for dereferencing/getting the address of objects), but I still need to add the ability to dereference and assign.
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July 2021 monthly "What are you working on?" thread
I started to experiment with using MLIR to write a high-level IR for my language bluebird, which will hopefully reduce the work of implementing features I want to add such as generics and ranges, as well as allowing me to eventually write some optimizations. I am also considering rewriting my AST as an MLIR dialect, since MLIR provides a bunch of type-checking/error printing/support infrastructure.
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June 2021 monthly "What are you working on?" thread
I continued implementing support for references (a restricted form of pointers) in my Ada-like language bluebird. I also am working on adding a cleanup pass between my parser/typechecker to handle stuff like type resolution of literals and constant folding.
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May 2021 monthly "What are you working on?" thread
I didn’t add too many new features to my Ada-like language bluebird this month because of lots of projects/school stuff.
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LLVM’s New Pass Manager
Here is a link to my optimizer pass setup for reference. This is just a simple optimization pipeline (I think clang has a setup where optimization stages are re-run multiple times to take advantage of inlining making more optimizations possible).
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March 2021 monthly "What are you working on?" thread
I made some more progress on bluebird, my Ada-like language.
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February 2021 monthly "What are you working on?" thread
I continued to make progress on the compiler for my Ada-inspired language bluebird. I will have less time to spend on it as classes began earlier last month, but I still hope to continue working on it. Things are getting to the point where adding a new feature isn’t as difficult as it was when doing so often meant writing the supporting code from nothing.
What are some alternatives?
mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
starlight - JS engine in Rust
tinycc - Unofficial mirror of mob development branch
durin - the Dependent Unboxed higher-oRder Intermediate Notation
asmjit - Low-latency machine code generation
pika - A WIP little dependently-typed systems language
konna - A fast functional language based on two level type theory
Matrix - Easy-to-use Scientific Computing library in/for C++ available for Linux and Windows.
boring-lang - A very boring programming language
xvm - Ecstasy and XVM
asmdb - Instructions database and utilities for X86/X64 and ARM (THUMB/A32/A64) architectures.
The-Spiral-Language - Functional language with intensional polymorphism and first-class staging.