ArxPy

ArxPy is the typed Python API for parsing, checking, compiling, and running Arx programs without invoking the CLI.

Current status

ArxPy now has a pre-stable end-to-end compiler facade.

Implemented:

• Diagnostic and DiagnosticSeverity
• conversion helpers for IRx diagnostics and Arx parser failures
• ArxError as the public base exception
• ParseError, CompileError, and ExecutionError
• lightweight imports that do not initialize LLVM at module import time
• parse-from-string and parse-from-file entry points through Compiler
• semantic checking and structured diagnostic translation
• host LLVM IR, object, and executable artifacts
• captured execution with arguments, environment, working directory, and timeout
• runtime validation of public arguments and every collection item
• serialized repeated/concurrent operations while the frontend uses global input state

Not yet stable or implemented:

• cancellation and asynchronous compilation
• cross-target selection and target discovery
• compiler test-discovery facade
• cache controls and a query/LSP protocol
• compatibility guarantees for the pre-1.0 facade

Install

pip install arxpy

Usage

from pathlib import Path

from arxpy import ArtifactKind, Compiler

compiler = Compiler()
parsed = compiler.parse_file("program.x")
checked = compiler.check(parsed)
artifact = compiler.compile(
    checked,
    kind=ArtifactKind.EXECUTABLE,
    output=Path("build/program"),
)
result = compiler.run(artifact, timeout=10)
print(result.exit_code, result.stdout, result.stderr)

Expected failures expose structured diagnostics:

from arxpy import ArxError, Compiler

try:
    Compiler().check(Compiler().parse_file("program.x"))
except ArxError as error:
    for item in error.diagnostics:
        print(item.code, item.filename, item.line, item.column, item.message)

In-memory native compilation requires an explicit output path. File compilation defaults beside the source. No implicit persistent temporary directory is created. Compiler calls are safe to repeat and are serialized across instances because the current lexer reads a process-wide source buffer. Execution never uses a shell; a non-zero program exit is returned in ExecutionResult rather than raised. Command arguments must be supplied as a non-string sequence of strings; scalar str and bytes values are rejected.

Use the Arx CLI for compiler test discovery and other CLI-specific workflows. The roadmap tracks the remaining API stability work.