Arx language compiler

arxlang is the main language frontend in the ArxLang ecosystem. It provides the arx Python package and arx command for lexing, parsing, inspecting, and compiling .x source files.

Arx emits ASTx nodes and delegates semantic analysis, LLVM lowering, native runtime features, and linking to IRx.

Status: functional prototype. Supported behavior is tested, but the language and APIs are not yet production-stable.

Native Apache Arrow collections

Arx exposes data-oriented types backed by IRx's native Arrow C++ runtime:

tensor[T, D0, ...] uses arrow::Tensor
dataframe[name: T, ...] uses arrow::Table
series[T] uses arrow::ChunkedArray

fn main() -> i32:
  var grid: tensor[i32, 2, 2] = [[1, 2], [3, 4]]
  var rows: dataframe[id: i32, score: f64] = dataframe({
    id: [1, 2, 3],
    score: [0.5, 0.8, 1.0],
  })
  return cast(rows.nrows(), i32)

Current Tensor elements are fixed-width signed integers and floats. Current DataFrame columns are fixed-width numeric values or bool. Runtime-shaped Tensor and runtime-schema DataFrame types are parameter-only, and their dynamic index/column access remains deferred.

Install

pip install arxlang
arx --version

Building executables requires LLVM/Clang-compatible tools. Arrow-backed features also require a C++ compiler.

CLI

arx --show-tokens program.x
arx --show-ast program.x
arx --show-llvm-ir program.x
arx program.x --output-file program
arx --run program.x
arx test

Use --link-mode auto, pie, or no-pie when a platform requires an explicit linking mode.

Implemented language areas

explicit scalar, collection, class, and finite-union annotations
functions, trailing defaults, externs, and templates
mutable variables, assignments, casts, isinstance, and type
if/else, while, count loops, and list-valued for ... in
absolute, relative, grouped, namespace, installed-package, and stdlib imports
classes, inheritance, fields, methods, modifiers, and default construction
lists, builtin range, Tensors, DataFrames, and Series
Douki module/class/function/method docstrings
fatal assertions and compiled tests

Boundaries

Arx owns source syntax and CLI behavior. It does not define new AST node types or implement feature lowering locally: those responsibilities belong to ASTx and IRx respectively.

Documentation: https://arxlang.org

License: Apache-2.0.

Metadata

Release files for arxlang 1.24.1

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for arxlang 1.24.1
File	Size	Uploaded
arxlang-1.24.1.tar.gz	66.9 kB	Aug 5, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for arxlang 1.24.1
File	Interpreter	ABI	Platform	Reset
arxlang-1.24.1-py3-none-any.whl 79.8 kB Aug 5, 2026	Python 3	none	any	Details

Total release size: 146.8 kB

Release files / arxlang-1.24.1.tar.gz

Download URL	arxlang-1.24.1.tar.gz
Size	66.9 kB
Tags	Source
SHA-256 checksum How to use checksums	`fa6a0e8b3424f813ede26f976694a8c7083ebab027e95f9acfc3110f8722351e`
BLAKE2b-256 checksum How to use checksums	`1276aab44c527ab273fd1baf65d864afcfbfb89b4793221c028635f40a71dee0`
Upload date	Aug 5, 2026
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Uploaded via	`poetry/2.4.1 CPython/3.10.20 Linux/6.17.0-1020-azure`

Release files / arxlang-1.24.1-py3-none-any.whl

Download URL	arxlang-1.24.1-py3-none-any.whl
Size	79.8 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`fb75cf64adf0b0312560bdab49f205dcf8964a874bfe94e68e1a7e5223159fd8`
BLAKE2b-256 checksum How to use checksums	`7521db681a6836f4894bd958f5710bd90eb369e265dd4080993ecedad4bd4962`
Upload date	Aug 5, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`poetry/2.4.1 CPython/3.10.20 Linux/6.17.0-1020-azure`