#moonbit-abc

#Features

• Header and directive parsing for common ABC fields, extensions, voices, lyrics, and comments.
• Structured music nodes for notes, rests, bars, repeats, ornaments, chords, decorations, tuplets, and voice switches.
• Source spans with line and column information for editor diagnostics and recovery workflows.
• Semantic analysis for meters, voices, note ranges, duration totals, repeated sections, and quality rules.
• Deterministic JSON schema v1 export and canonical pretty-printing.
• A CLI for checking, formatting, JSON export, analysis, format checks, and repeatable benchmark runs.

#Quick start

moon run cmd/abc --target native check examples/demo.abc
moon run cmd/abc --target native analyze examples/demo.abc
moon run cmd/abc --target native format-check examples/demo.abc
moon run cmd/abc --target native json examples/demo.abc
moon run cmd/abc --target native benchmark examples/demo.abc

#Library usage

let document = @abc.parse(source)
let diagnostics = @abc.validate(document)
let json = @abc.to_json(document).stringify(indent=2)
let canonical = @abc.pretty_print(document)
let profile = @abc.music_profile(document)

#Repository layout

src/abc/        reusable parser, AST, semantic analysis, diagnostics, and exports
cmd/abc/        native CLI entry point and command tests
examples/       runnable ABC inputs
fixtures/abc/   boundary and benchmark inputs
benchmarks/     reproducible benchmark instructions and evidence
docs/           schema, source notes, and API documentation
tools/          repository verification scripts
.github/        CI and manual package-publish workflows

#Development

moon fmt --check
moon check --deny-warn --fmt
moon test --deny-warn
moon info
moon build --target native
moon build --target wasm-gc
powershell -File tools/count_moonbit_lines.ps1 -RequireMinimum 7000

#Schema and compatibility

#License