initial

.editorconfig

@@ -0,0 +1,3 @@
+[*]
+indent_style = space
+indent_size = 2

.envrc

@@ -0,0 +1,2 @@
+layout python3
+export PATH="$PATH:/Users/michael/Projects/codon/codon-deploy/bin"

.gitignore

@@ -0,0 +1,4 @@
+__pycache__
+*.pyc
+*.egg-info
+.direnv

book/.gitignore

@@ -0,0 +1 @@
+/book

book/book.toml

@@ -0,0 +1,8 @@
+[book]
+authors = ["Michael Zhang"]
+language = "en"
+multilingual = false
+src = "src"
+title = "My Language Book"
+
+[preprocessor.katex]

book/src/SUMMARY.md

@@ -0,0 +1,9 @@
+- [Front](./front.md)
+
+# First Part
+
+- [Parsing](./part1/parsing.md)
+
+# Specification
+
+- [Front](./spec/front.md)

book/src/front.md

@@ -0,0 +1,40 @@
+# My language
+
+The language we're going to build has the following features:
+
+- Interpreted
+- Dynamically typed
+- First class functions
+
+Later on, we'll start incorporating these features into it:
+
+- Static typing
+- Ahead-of-time compilation
+- Macros
+
+The focus is on promoting _good_ programming language principles, and creating a
+good ecosystem around the programming language to make it easily usable by
+others.
+
+Here's some example code:
+
+```
+from std import (x)
+
+fn main():
+  print "hello world!"
+```
+
+We'll be implementing this language first in Python, to a point of usability.
+However, this means all code written with our language will depend on a Python
+interpreter to exist. To free ourselves from this restriction we will port the
+interpreter into a compiler, written in our own language. This is called _self
+hosting_.[^1]
+
+As a result, the initial implementation of the language will include a subset of
+the features from the rest of the language. I'm going to call this "mylang0",
+with the extension `.my0`.
+
+[^1]: We could optionally also write a custom runtime, but that's essentially
+just re-implementing the existing interpreter in a language that can compile
+into free-standing binaries.

book/src/part1/parsing.md

@@ -0,0 +1,8 @@
+# Parsing
+
+The grammar looks like this:
+
+```
+```
+
+https://bodil.lol/parser-combinators/

book/src/spec/front.md

@@ -0,0 +1,5 @@
+# Front
+
+This is a specification for the language "mylang". This exists to unify the gap
+between the interpreter and the compiler to ensure they have the same behavior
+(where implemented).

pyimpl/.gitignore

@@ -0,0 +1 @@
+.mypy_cache

pyimpl/examples/hello.my0

@@ -0,0 +1,2 @@
+fn main():
+  print "hello, world!"

pyimpl/mylang/__init__.py

@@ -0,0 +1,23 @@
+import click
+from pathlib import Path
+
+from mylang.parser import mylang0
+
+
+@click.command()
+@click.argument("path", type=click.Path(exists=True))
+def main(path: Path):
+  print(path)
+  print(locate_standard_library())
+
+  with open(path) as f:
+    contents: str = f.read()
+    mylang0.parse(contents)
+
+
+def locate_standard_library():
+  locations: list[Path] = [Path(__file__).parents[1] / "std" / "std.mypkg"]
+  for location in locations:
+    if location.exists():
+      return location
+  return None

pyimpl/mylang/parser/combinators.py

@@ -0,0 +1,27 @@
+from typing import TypeVar, Generic, Callable, Optional, List, Tuple, Union
+
+Result = TypeVar("Result")
+UserData = TypeVar("UserData")
+T = TypeVar("T")
+U = TypeVar("U")
+
+ParserType = Callable[[str], Union[Tuple[str, T], str]]
+
+
+class Parser(Generic[T, UserData]):
+  run: Callable[[str], T]
+
+  def __init__(self, run: Callable[[str], T]) -> None:
+    self.run = run
+
+  def parse(self, input: str) -> T:
+    return self.run(input)
+
+  def and_then(
+    self, and_then_func: Callable[[T], "Parser[U, UserData]"]
+  ) -> "Parser[U, UserData]":
+    return Parser(lambda input: and_then_func(self.run(input)))
+
+
+def many(parser: Parser[T, UserData]) -> Parser[List[T], UserData]:
+  return 1

pyimpl/mylang/parser/mylang0.py

@@ -0,0 +1,5 @@
+from mylang.parser.combinators import many
+
+
+def parse(input: str):
+  return input

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+
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+
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+optional = false
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pyimpl/pyproject.toml

@@ -0,0 +1,31 @@
+[project]
+name = "mylang"
+version = "0.1.0"
+
+[project.scripts]
+mylang = "mylang:main"
+
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[tool.ruff]
+indent-width = 2
+
+[tool.ruff.format]
+quote-style = "double"
+indent-style = "space"
+
+[tool.poetry]
+name = "mylang"
+version = "0.1.0"
+description = "My Language"
+authors = ["Michael Zhang <mail@mzhang.io>"]
+
+[tool.poetry.dependencies]
+python = "^3.11"
+
+[tool.poetry.group.dev.dependencies]
+mypy = "^1.10.0"
+click = "^8.1.7"
+setuptools = "^69.5.1"

pyimpl/setup.py

@@ -0,0 +1,6 @@
+from setuptools import setup, find_packages
+
+setup(
+  name="mylang",
+  version="0.1.0",
+)

rustfmt.toml

@@ -0,0 +1 @@
+tab_spaces = 2

rustimpl/.gitignore

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rustimpl/Cargo.toml

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+version = "0.1.0"
+edition = "2021"
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rustimpl/build.rs

@@ -0,0 +1,3 @@
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+  lalrpop::process_root().unwrap();
+}

rustimpl/src/grammar.lalrpop

@@ -0,0 +1,5 @@
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+
+pub Program = Decl*;
+
+Decl = "";

rustimpl/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+  println!("Hello, world!");
+}