Add Tree-sitter grammar for Decodal

2026-06-16 12:01:29 +09:00 · 2026-06-16 12:01:29 +09:00 · 58d2c9b423
commit 58d2c9b423
parent f1a5836247
39 changed files with 8453 additions and 1 deletions
--- a/devshell.nix
+++ b/devshell.nix
@ -4,9 +4,11 @@ pkgs.mkShell {
    cargo
    clippy
    git
+    nodejs
    nixfmt
    rustc
    rustfmt
+    tree-sitter
  ];

  shellHook = ''
--- a/doc/manual/souce/development.md
+++ b/doc/manual/souce/development.md
@ -0,0 +1,91 @@
+# Development
+
+This document describes the development workflow for Decodal itself.
+
+## Rust checks
+
+Run the normal Rust checks from the repository root.
+
+```sh
+cargo fmt --check
+cargo test
+cargo check -p decodal-core --no-default-features
+nix flake check
+```
+
+Regex support is optional and should be tested explicitly when touched.
+
+```sh
+cargo test -p decodal-core --features regex
+cargo run -q -p decodal --features regex -- examples/regex/main.dcdl
+```
+
+## Tree-sitter grammar
+
+The Tree-sitter grammar is kept in:
+
+```text
+editors/tree-sitter-decodal/
+```
+
+Important files:
+
+```text
+editors/tree-sitter-decodal/grammar.js
+editors/tree-sitter-decodal/queries/highlights.scm
+editors/tree-sitter-decodal/queries/locals.scm
+editors/tree-sitter-decodal/corpus/basic.txt
+```
+
+The grammar is intended to be portable across editors such as Zed, Neovim, Helix, and Emacs.
+Zed support should consume this grammar rather than relying on a TextMate grammar.
+
+## Tree-sitter commands
+
+From the grammar directory:
+
+```sh
+cd editors/tree-sitter-decodal
+npm install
+npx tree-sitter generate
+npx tree-sitter test
+```
+
+To inspect a parse tree:
+
+```sh
+npx tree-sitter parse ../../examples/advanced/main.dcdl
+```
+
+The generated parser files under `editors/tree-sitter-decodal/src/` are committed so editor integrations can consume the grammar without regenerating it first.
+`node_modules/` is ignored and must not be committed.
+
+## Updating the grammar
+
+When the Decodal syntax changes:
+
+1. Update `grammar.js`.
+2. Run `npx tree-sitter generate`.
+3. Add or update corpus tests in `corpus/`.
+4. Update highlight queries in `queries/highlights.scm` if token names changed.
+5. Run `npx tree-sitter test`.
+6. Run Rust checks from the repository root if the language parser or examples also changed.
+
+## Development shell
+
+The Nix development shell includes Rust tooling, Node.js, and Tree-sitter CLI tooling.
+
+```sh
+nix develop
+```
+
+The shell provides:
+
+- `cargo`
+- `rustc`
+- `rustfmt`
+- `clippy`
+- `node`
+- `npm`
+- `tree-sitter`
+- `nixfmt`
--- a/doc/manual/souce/index.md
+++ b/doc/manual/souce/index.md
@ -43,4 +43,5 @@ Decodal は Deferred Constraint Data Language、略称 DCDL のプロジェク
   5. [Diagnostics and Fallback](./design/diagnostics-and-fallback.md)
   6. [Embedding API](./design/embedding-api.md)
   7. [Features](./design/features.md)
-4. [Open Issues](./open-issues.md)
+4. [Development](./development.md)
+5. [Open Issues](./open-issues.md)
--- a/editors/tree-sitter-decodal/.editorconfig
+++ b/editors/tree-sitter-decodal/.editorconfig
@ -0,0 +1,39 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{json,toml,yml,gyp}]
+indent_style = space
+indent_size = 2
+
+[*.js]
+indent_style = space
+indent_size = 2
+
+[*.rs]
+indent_style = space
+indent_size = 4
+
+[*.{c,cc,h}]
+indent_style = space
+indent_size = 4
+
+[*.{py,pyi}]
+indent_style = space
+indent_size = 4
+
+[*.swift]
+indent_style = space
+indent_size = 4
+
+[*.go]
+indent_style = tab
+indent_size = 8
+
+[Makefile]
+indent_style = tab
+indent_size = 8
--- a/editors/tree-sitter-decodal/.gitattributes
+++ b/editors/tree-sitter-decodal/.gitattributes
@ -0,0 +1,11 @@
+* text eol=lf
+
+src/*.json linguist-generated
+src/parser.c linguist-generated
+src/tree_sitter/* linguist-generated
+
+bindings/** linguist-generated
+binding.gyp linguist-generated
+setup.py linguist-generated
+Makefile linguist-generated
+Package.swift linguist-generated
--- a/editors/tree-sitter-decodal/.gitignore
+++ b/editors/tree-sitter-decodal/.gitignore
@ -0,0 +1,38 @@
+# Rust artifacts
+Cargo.lock
+target/
+
+# Node artifacts
+build/
+prebuilds/
+node_modules/
+*.tgz
+
+# Swift artifacts
+.build/
+
+# Go artifacts
+go.sum
+_obj/
+
+# Python artifacts
+.venv/
+dist/
+*.egg-info
+*.whl
+
+# C artifacts
+*.a
+*.so
+*.so.*
+*.dylib
+*.dll
+*.pc
+
+# Example dirs
+/examples/*/
+
+# Grammar volatiles
+*.wasm
+*.obj
+*.o
--- a/editors/tree-sitter-decodal/Cargo.toml
+++ b/editors/tree-sitter-decodal/Cargo.toml
@ -0,0 +1,23 @@
+[package]
+name = "tree-sitter-decodal"
+description = "Decodal grammar for tree-sitter"
+version = "0.0.1"
+license = "MIT"
+readme = "README.md"
+keywords = ["incremental", "parsing", "tree-sitter", "decodal"]
+categories = ["parsing", "text-editors"]
+repository = "https://github.com/tree-sitter/tree-sitter-decodal"
+edition = "2021"
+autoexamples = false
+
+build = "bindings/rust/build.rs"
+include = ["bindings/rust/*", "grammar.js", "queries/*", "src/*"]
+
+[lib]
+path = "bindings/rust/lib.rs"
+
+[dependencies]
+tree-sitter = ">=0.22.6"
+
+[build-dependencies]
+cc = "1.0.87"
--- a/editors/tree-sitter-decodal/Makefile
+++ b/editors/tree-sitter-decodal/Makefile
@ -0,0 +1,112 @@
+VERSION := 0.0.1
+
+LANGUAGE_NAME := tree-sitter-decodal
+
+# repository
+SRC_DIR := src
+
+PARSER_REPO_URL := $(shell git -C $(SRC_DIR) remote get-url origin 2>/dev/null)
+
+ifeq ($(PARSER_URL),)
+	PARSER_URL := $(subst .git,,$(PARSER_REPO_URL))
+ifeq ($(shell echo $(PARSER_URL) | grep '^[a-z][-+.0-9a-z]*://'),)
+	PARSER_URL := $(subst :,/,$(PARSER_URL))
+	PARSER_URL := $(subst git@,https://,$(PARSER_URL))
+endif
+endif
+
+TS ?= tree-sitter
+
+# ABI versioning
+SONAME_MAJOR := $(word 1,$(subst ., ,$(VERSION)))
+SONAME_MINOR := $(word 2,$(subst ., ,$(VERSION)))
+
+# install directory layout
+PREFIX ?= /usr/local
+INCLUDEDIR ?= $(PREFIX)/include
+LIBDIR ?= $(PREFIX)/lib
+PCLIBDIR ?= $(LIBDIR)/pkgconfig
+
+# source/object files
+PARSER := $(SRC_DIR)/parser.c
+EXTRAS := $(filter-out $(PARSER),$(wildcard $(SRC_DIR)/*.c))
+OBJS := $(patsubst %.c,%.o,$(PARSER) $(EXTRAS))
+
+# flags
+ARFLAGS ?= rcs
+override CFLAGS += -I$(SRC_DIR) -std=c11 -fPIC
+
+# OS-specific bits
+ifeq ($(OS),Windows_NT)
+	$(error "Windows is not supported")
+else ifeq ($(shell uname),Darwin)
+	SOEXT = dylib
+	SOEXTVER_MAJOR = $(SONAME_MAJOR).dylib
+	SOEXTVER = $(SONAME_MAJOR).$(SONAME_MINOR).dylib
+	LINKSHARED := $(LINKSHARED)-dynamiclib -Wl,
+	ifneq ($(ADDITIONAL_LIBS),)
+	LINKSHARED := $(LINKSHARED)$(ADDITIONAL_LIBS),
+	endif
+	LINKSHARED := $(LINKSHARED)-install_name,$(LIBDIR)/lib$(LANGUAGE_NAME).$(SONAME_MAJOR).dylib,-rpath,@executable_path/../Frameworks
+else
+	SOEXT = so
+	SOEXTVER_MAJOR = so.$(SONAME_MAJOR)
+	SOEXTVER = so.$(SONAME_MAJOR).$(SONAME_MINOR)
+	LINKSHARED := $(LINKSHARED)-shared -Wl,
+	ifneq ($(ADDITIONAL_LIBS),)
+	LINKSHARED := $(LINKSHARED)$(ADDITIONAL_LIBS)
+	endif
+	LINKSHARED := $(LINKSHARED)-soname,lib$(LANGUAGE_NAME).so.$(SONAME_MAJOR)
+endif
+ifneq ($(filter $(shell uname),FreeBSD NetBSD DragonFly),)
+	PCLIBDIR := $(PREFIX)/libdata/pkgconfig
+endif
+
+all: lib$(LANGUAGE_NAME).a lib$(LANGUAGE_NAME).$(SOEXT) $(LANGUAGE_NAME).pc
+
+lib$(LANGUAGE_NAME).a: $(OBJS)
+	$(AR) $(ARFLAGS) $@ $^
+
+lib$(LANGUAGE_NAME).$(SOEXT): $(OBJS)
+	$(CC) $(LDFLAGS) $(LINKSHARED) $^ $(LDLIBS) -o $@
+ifneq ($(STRIP),)
+	$(STRIP) $@
+endif
+
+$(LANGUAGE_NAME).pc: bindings/c/$(LANGUAGE_NAME).pc.in
+	sed  -e 's|@URL@|$(PARSER_URL)|' \
+		-e 's|@VERSION@|$(VERSION)|' \
+		-e 's|@LIBDIR@|$(LIBDIR)|' \
+		-e 's|@INCLUDEDIR@|$(INCLUDEDIR)|' \
+		-e 's|@REQUIRES@|$(REQUIRES)|' \
+		-e 's|@ADDITIONAL_LIBS@|$(ADDITIONAL_LIBS)|' \
+		-e 's|=$(PREFIX)|=$${prefix}|' \
+		-e 's|@PREFIX@|$(PREFIX)|' $< > $@
+
+$(PARSER): $(SRC_DIR)/grammar.json
+	$(TS) generate --no-bindings $^
+
+install: all
+	install -d '$(DESTDIR)$(INCLUDEDIR)'/tree_sitter '$(DESTDIR)$(PCLIBDIR)' '$(DESTDIR)$(LIBDIR)'
+	install -m644 bindings/c/$(LANGUAGE_NAME).h '$(DESTDIR)$(INCLUDEDIR)'/tree_sitter/$(LANGUAGE_NAME).h
+	install -m644 $(LANGUAGE_NAME).pc '$(DESTDIR)$(PCLIBDIR)'/$(LANGUAGE_NAME).pc
+	install -m644 lib$(LANGUAGE_NAME).a '$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).a
+	install -m755 lib$(LANGUAGE_NAME).$(SOEXT) '$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).$(SOEXTVER)
+	ln -sf lib$(LANGUAGE_NAME).$(SOEXTVER) '$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).$(SOEXTVER_MAJOR)
+	ln -sf lib$(LANGUAGE_NAME).$(SOEXTVER_MAJOR) '$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).$(SOEXT)
+
+uninstall:
+	$(RM) '$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).a \
+		'$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).$(SOEXTVER) \
+		'$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).$(SOEXTVER_MAJOR) \
+		'$(DESTDIR)$(LIBDIR)'/lib$(LANGUAGE_NAME).$(SOEXT) \
+		'$(DESTDIR)$(INCLUDEDIR)'/tree_sitter/$(LANGUAGE_NAME).h \
+		'$(DESTDIR)$(PCLIBDIR)'/$(LANGUAGE_NAME).pc
+
+clean:
+	$(RM) $(OBJS) $(LANGUAGE_NAME).pc lib$(LANGUAGE_NAME).a lib$(LANGUAGE_NAME).$(SOEXT)
+
+test:
+	$(TS) test
+
+.PHONY: all install uninstall clean test
--- a/editors/tree-sitter-decodal/Package.swift
+++ b/editors/tree-sitter-decodal/Package.swift
@ -0,0 +1,47 @@
+// swift-tools-version:5.3
+import PackageDescription
+
+let package = Package(
+    name: "TreeSitterDecodal",
+    products: [
+        .library(name: "TreeSitterDecodal", targets: ["TreeSitterDecodal"]),
+    ],
+    dependencies: [],
+    targets: [
+        .target(name: "TreeSitterDecodal",
+                path: ".",
+                exclude: [
+                    "Cargo.toml",
+                    "Makefile",
+                    "binding.gyp",
+                    "bindings/c",
+                    "bindings/go",
+                    "bindings/node",
+                    "bindings/python",
+                    "bindings/rust",
+                    "prebuilds",
+                    "grammar.js",
+                    "package.json",
+                    "package-lock.json",
+                    "pyproject.toml",
+                    "setup.py",
+                    "test",
+                    "examples",
+                    ".editorconfig",
+                    ".github",
+                    ".gitignore",
+                    ".gitattributes",
+                    ".gitmodules",
+                ],
+                sources: [
+                    "src/parser.c",
+                    // NOTE: if your language has an external scanner, add it here.
+                ],
+                resources: [
+                    .copy("queries")
+                ],
+                publicHeadersPath: "bindings/swift",
+                cSettings: [.headerSearchPath("src")])
+    ],
+    cLanguageStandard: .c11
+)
--- a/editors/tree-sitter-decodal/binding.gyp
+++ b/editors/tree-sitter-decodal/binding.gyp
@ -0,0 +1,30 @@
+{
+  "targets": [
+    {
+      "target_name": "tree_sitter_decodal_binding",
+      "dependencies": [
+        "<!(node -p \"require('node-addon-api').targets\"):node_addon_api_except",
+      ],
+      "include_dirs": [
+        "src",
+      ],
+      "sources": [
+        "bindings/node/binding.cc",
+        "src/parser.c",
+        # NOTE: if your language has an external scanner, add it here.
+      ],
+      "conditions": [
+        ["OS!='win'", {
+          "cflags_c": [
+            "-std=c11",
+          ],
+        }, { # OS == "win"
+          "cflags_c": [
+            "/std:c11",
+            "/utf-8",
+          ],
+        }],
+      ],
+    }
+  ]
+}
--- a/editors/tree-sitter-decodal/bindings/c/tree-sitter-decodal.h
+++ b/editors/tree-sitter-decodal/bindings/c/tree-sitter-decodal.h
@ -0,0 +1,16 @@
+#ifndef TREE_SITTER_DECODAL_H_
+#define TREE_SITTER_DECODAL_H_
+
+typedef struct TSLanguage TSLanguage;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const TSLanguage *tree_sitter_decodal(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // TREE_SITTER_DECODAL_H_
--- a/editors/tree-sitter-decodal/bindings/c/tree-sitter-decodal.pc.in
+++ b/editors/tree-sitter-decodal/bindings/c/tree-sitter-decodal.pc.in
@ -0,0 +1,11 @@
+prefix=@PREFIX@
+libdir=@LIBDIR@
+includedir=@INCLUDEDIR@
+
+Name: tree-sitter-decodal
+Description: Decodal grammar for tree-sitter
+URL: @URL@
+Version: @VERSION@
+Requires: @REQUIRES@
+Libs: -L${libdir} @ADDITIONAL_LIBS@ -ltree-sitter-decodal
+Cflags: -I${includedir}
--- a/editors/tree-sitter-decodal/bindings/go/binding.go
+++ b/editors/tree-sitter-decodal/bindings/go/binding.go
@ -0,0 +1,13 @@
+package tree_sitter_decodal
+
+// #cgo CFLAGS: -std=c11 -fPIC
+// #include "../../src/parser.c"
+// // NOTE: if your language has an external scanner, add it here.
+import "C"
+
+import "unsafe"
+
+// Get the tree-sitter Language for this grammar.
+func Language() unsafe.Pointer {
+	return unsafe.Pointer(C.tree_sitter_decodal())
+}
--- a/editors/tree-sitter-decodal/bindings/go/binding_test.go
+++ b/editors/tree-sitter-decodal/bindings/go/binding_test.go
@ -0,0 +1,15 @@
+package tree_sitter_decodal_test
+
+import (
+	"testing"
+
+	tree_sitter "github.com/smacker/go-tree-sitter"
+	"github.com/tree-sitter/tree-sitter-decodal"
+)
+
+func TestCanLoadGrammar(t *testing.T) {
+	language := tree_sitter.NewLanguage(tree_sitter_decodal.Language())
+	if language == nil {
+		t.Errorf("Error loading Decodal grammar")
+	}
+}
--- a/editors/tree-sitter-decodal/bindings/go/go.mod
+++ b/editors/tree-sitter-decodal/bindings/go/go.mod
@ -0,0 +1,5 @@
+module github.com/tree-sitter/tree-sitter-decodal
+
+go 1.22
+
+require github.com/smacker/go-tree-sitter v0.0.0-20230720070738-0d0a9f78d8f8
--- a/editors/tree-sitter-decodal/bindings/node/binding.cc
+++ b/editors/tree-sitter-decodal/bindings/node/binding.cc
@ -0,0 +1,20 @@
+#include <napi.h>
+
+typedef struct TSLanguage TSLanguage;
+
+extern "C" TSLanguage *tree_sitter_decodal();
+
+// "tree-sitter", "language" hashed with BLAKE2
+const napi_type_tag LANGUAGE_TYPE_TAG = {
+  0x8AF2E5212AD58ABF, 0xD5006CAD83ABBA16
+};
+
+Napi::Object Init(Napi::Env env, Napi::Object exports) {
+    exports["name"] = Napi::String::New(env, "decodal");
+    auto language = Napi::External<TSLanguage>::New(env, tree_sitter_decodal());
+    language.TypeTag(&LANGUAGE_TYPE_TAG);
+    exports["language"] = language;
+    return exports;
+}
+
+NODE_API_MODULE(tree_sitter_decodal_binding, Init)
--- a/editors/tree-sitter-decodal/bindings/node/index.d.ts
+++ b/editors/tree-sitter-decodal/bindings/node/index.d.ts
@ -0,0 +1,28 @@
+type BaseNode = {
+  type: string;
+  named: boolean;
+};
+
+type ChildNode = {
+  multiple: boolean;
+  required: boolean;
+  types: BaseNode[];
+};
+
+type NodeInfo =
+  | (BaseNode & {
+      subtypes: BaseNode[];
+    })
+  | (BaseNode & {
+      fields: { [name: string]: ChildNode };
+      children: ChildNode[];
+    });
+
+type Language = {
+  name: string;
+  language: unknown;
+  nodeTypeInfo: NodeInfo[];
+};
+
+declare const language: Language;
+export = language;
--- a/editors/tree-sitter-decodal/bindings/node/index.js
+++ b/editors/tree-sitter-decodal/bindings/node/index.js
@ -0,0 +1,7 @@
+const root = require("path").join(__dirname, "..", "..");
+
+module.exports = require("node-gyp-build")(root);
+
+try {
+  module.exports.nodeTypeInfo = require("../../src/node-types.json");
+} catch (_) {}
--- a/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/init.py
+++ b/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/init.py
@ -0,0 +1,5 @@
+"Decodal grammar for tree-sitter"
+
+from ._binding import language
+
+__all__ = ["language"]
--- a/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/init.pyi
+++ b/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/init.pyi
@ -0,0 +1 @@
+def language() -> int: ...
--- a/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/binding.c
+++ b/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/binding.c
@ -0,0 +1,27 @@
+#include <Python.h>
+
+typedef struct TSLanguage TSLanguage;
+
+TSLanguage *tree_sitter_decodal(void);
+
+static PyObject* _binding_language(PyObject *self, PyObject *args) {
+    return PyLong_FromVoidPtr(tree_sitter_decodal());
+}
+
+static PyMethodDef methods[] = {
+    {"language", _binding_language, METH_NOARGS,
+     "Get the tree-sitter language for this grammar."},
+    {NULL, NULL, 0, NULL}
+};
+
+static struct PyModuleDef module = {
+    .m_base = PyModuleDef_HEAD_INIT,
+    .m_name = "_binding",
+    .m_doc = NULL,
+    .m_size = -1,
+    .m_methods = methods
+};
+
+PyMODINIT_FUNC PyInit__binding(void) {
+    return PyModule_Create(&module);
+}
--- a/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/py.typed
+++ b/editors/tree-sitter-decodal/bindings/python/tree_sitter_decodal/py.typed
--- a/editors/tree-sitter-decodal/bindings/rust/build.rs
+++ b/editors/tree-sitter-decodal/bindings/rust/build.rs
@ -0,0 +1,22 @@
+fn main() {
+    let src_dir = std::path::Path::new("src");
+
+    let mut c_config = cc::Build::new();
+    c_config.std("c11").include(src_dir);
+
+    #[cfg(target_env = "msvc")]
+    c_config.flag("-utf-8");
+
+    let parser_path = src_dir.join("parser.c");
+    c_config.file(&parser_path);
+    println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());
+
+    // NOTE: if your language uses an external scanner, uncomment this block:
+    /*
+    let scanner_path = src_dir.join("scanner.c");
+    c_config.file(&scanner_path);
+    println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
+    */
+
+    c_config.compile("tree-sitter-decodal");
+}
--- a/editors/tree-sitter-decodal/bindings/rust/lib.rs
+++ b/editors/tree-sitter-decodal/bindings/rust/lib.rs
@ -0,0 +1,54 @@
+//! This crate provides Decodal language support for the [tree-sitter][] parsing library.
+//!
+//! Typically, you will use the [language][language func] function to add this language to a
+//! tree-sitter [Parser][], and then use the parser to parse some code:
+//!
+//! ```
+//! let code = r#"
+//! "#;
+//! let mut parser = tree_sitter::Parser::new();
+//! parser.set_language(&tree_sitter_decodal::language()).expect("Error loading Decodal grammar");
+//! let tree = parser.parse(code, None).unwrap();
+//! assert!(!tree.root_node().has_error());
+//! ```
+//!
+//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+//! [language func]: fn.language.html
+//! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
+//! [tree-sitter]: https://tree-sitter.github.io/
+
+use tree_sitter::Language;
+
+extern "C" {
+    fn tree_sitter_decodal() -> Language;
+}
+
+/// Get the tree-sitter [Language][] for this grammar.
+///
+/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+pub fn language() -> Language {
+    unsafe { tree_sitter_decodal() }
+}
+
+/// The content of the [`node-types.json`][] file for this grammar.
+///
+/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
+pub const NODE_TYPES: &str = include_str!("../../src/node-types.json");
+
+// Uncomment these to include any queries that this grammar contains
+
+// pub const HIGHLIGHTS_QUERY: &str = include_str!("../../queries/highlights.scm");
+// pub const INJECTIONS_QUERY: &str = include_str!("../../queries/injections.scm");
+// pub const LOCALS_QUERY: &str = include_str!("../../queries/locals.scm");
+// pub const TAGS_QUERY: &str = include_str!("../../queries/tags.scm");
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_can_load_grammar() {
+        let mut parser = tree_sitter::Parser::new();
+        parser
+            .set_language(&super::language())
+            .expect("Error loading Decodal grammar");
+    }
+}
--- a/editors/tree-sitter-decodal/bindings/swift/TreeSitterDecodal/decodal.h
+++ b/editors/tree-sitter-decodal/bindings/swift/TreeSitterDecodal/decodal.h
@ -0,0 +1,16 @@
+#ifndef TREE_SITTER_DECODAL_H_
+#define TREE_SITTER_DECODAL_H_
+
+typedef struct TSLanguage TSLanguage;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const TSLanguage *tree_sitter_decodal(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // TREE_SITTER_DECODAL_H_
--- a/editors/tree-sitter-decodal/corpus/basic.txt
+++ b/editors/tree-sitter-decodal/corpus/basic.txt
@ -0,0 +1,76 @@
+==================
+Top-level fields
+==================
+host = String;
+port = Int & > 443 default 8080;
+---
+
+(source_file
+  (field_definition
+    path: (field_path (identifier))
+    value: (identifier))
+  (field_definition
+    path: (field_path (identifier))
+    value: (default_expression
+      base: (binary_expression
+        left: (identifier)
+        right: (comparison_constraint
+          value: (integer)))
+      fallback: (literal (integer)))))
+
+==================
+Import and function
+==================
+let
+  schema = import "./schema.dcdl";
+  mk = (cfg: schema.Service) => cfg;
+in
+  mk({ name = "api"; })
+---
+
+(source_file
+  (let_expression
+    (field_definition
+      path: (field_path (identifier))
+      value: (import_expression
+        specifier: (string)))
+    (field_definition
+      path: (field_path (identifier))
+      value: (function_expression
+        (parameter
+          name: (identifier)
+          constraint: (path_expression
+            object: (identifier)
+            field: (identifier)))
+        body: (identifier)))
+    body: (call_expression
+      function: (identifier)
+      (object
+        (field_definition
+          path: (field_path (identifier))
+          value: (literal (string)))))))
+
+==================
+Match and patch
+==================
+base // {
+  summary = match env {
+    "prod": "production";
+    _: "other";
+  };
+}
+---
+
+(source_file
+  (binary_expression
+    left: (identifier)
+    right: (object
+      (field_definition
+        path: (field_path (identifier))
+        value: (match_expression
+          scrutinee: (identifier)
+          (match_arm
+            pattern: (literal (string))
+            body: (literal (string)))
+          (match_arm
+            body: (literal (string))))))))
--- a/editors/tree-sitter-decodal/grammar.js
+++ b/editors/tree-sitter-decodal/grammar.js
@ -0,0 +1,186 @@
+const PREC = {
+  DEFAULT: 1,
+  PATCH: 2,
+  AND: 3,
+  CALL: 7,
+  PATH: 8,
+};
+
+function commaSep(rule) {
+  return optional(seq(rule, repeat(seq(',', rule)), optional(',')));
+}
+
+function semiSep(rule) {
+  return optional(seq(rule, repeat(seq(';', rule)), optional(';')));
+}
+
+module.exports = grammar({
+  name: 'decodal',
+
+  extras: $ => [
+    /[\s\uFEFF\u2060\u200B]/,
+    $.comment,
+  ],
+
+  word: $ => $.identifier,
+
+  conflicts: $ => [
+    [$._expression, $.parameter],
+  ],
+
+  rules: {
+    source_file: $ => repeat($._statement),
+
+    _statement: $ => choice(
+      seq($.field_definition, optional(';')),
+      seq($._expression, optional(';')),
+    ),
+
+    comment: _ => token(seq('#', /.*/)),
+
+    _expression: $ => choice(
+      $.literal,
+      $.identifier,
+      $.regex_literal,
+      $.comparison_constraint,
+      $.object,
+      $.array,
+      $.let_expression,
+      $.function_expression,
+      $.match_expression,
+      $.import_expression,
+      $.parenthesized_expression,
+      $.call_expression,
+      $.path_expression,
+      $.binary_expression,
+      $.default_expression,
+    ),
+
+    literal: $ => choice(
+      $.string,
+      $.integer,
+      $.float,
+      $.boolean,
+    ),
+
+    boolean: _ => choice('true', 'false'),
+
+    string: _ => token(seq(
+      '"',
+      repeat(choice(/[^"\\\n]/, /\\./)),
+      '"',
+    )),
+
+    integer: _ => token(/[0-9]+/),
+    float: _ => token(/[0-9]+\.[0-9]+/),
+
+    identifier: _ => /[A-Za-z][A-Za-z0-9_]*/,
+
+    regex_literal: _ => token(seq(
+      '/',
+      repeat1(choice(/[^\/\\\n]/, /\\./)),
+      '/',
+    )),
+
+    object: $ => seq(
+      '{',
+      semiSep($.field_definition),
+      '}',
+    ),
+
+    field_definition: $ => seq(
+      field('path', $.field_path),
+      '=',
+      field('value', $._expression),
+    ),
+
+    field_path: $ => prec(10, seq(
+      $.identifier,
+      repeat(seq('.', $.identifier)),
+    )),
+
+    array: $ => seq(
+      '[',
+      commaSep($._expression),
+      ']',
+    ),
+
+    let_expression: $ => seq(
+      'let',
+      repeat(seq($.field_definition, ';')),
+      'in',
+      field('body', $._expression),
+    ),
+
+    function_expression: $ => prec.right(seq(
+      '(',
+      commaSep($.parameter),
+      ')',
+      '=>',
+      field('body', $._expression),
+    )),
+
+    parameter: $ => seq(
+      field('name', $.identifier),
+      optional(seq(':', field('constraint', $._expression))),
+    ),
+
+    match_expression: $ => seq(
+      'match',
+      field('scrutinee', $._expression),
+      '{',
+      semiSep($.match_arm),
+      '}',
+    ),
+
+    match_arm: $ => seq(
+      field('pattern', choice('_', $._expression)),
+      ':',
+      field('body', $._expression),
+    ),
+
+    import_expression: $ => seq(
+      'import',
+      field('specifier', $.string),
+    ),
+
+    parenthesized_expression: $ => seq('(', $._expression, ')'),
+
+    call_expression: $ => prec.left(PREC.CALL, seq(
+      field('function', $._expression),
+      '(',
+      commaSep($._expression),
+      ')',
+    )),
+
+    path_expression: $ => prec.left(PREC.PATH, seq(
+      field('object', $._expression),
+      '.',
+      field('field', $.identifier),
+    )),
+
+    comparison_constraint: $ => prec(6, seq(
+      field('operator', choice('>', '>=', '<', '<=')),
+      field('value', choice($.integer, $.float)),
+    )),
+
+    binary_expression: $ => choice(
+      prec.left(PREC.AND, seq(
+        field('left', $._expression),
+        field('operator', '&'),
+        field('right', $._expression),
+      )),
+      prec.left(PREC.PATCH, seq(
+        field('left', $._expression),
+        field('operator', token(prec(2, '//'))),
+        field('right', $._expression),
+      )),
+    ),
+
+    default_expression: $ => prec.right(PREC.DEFAULT, seq(
+      field('base', $._expression),
+      'default',
+      field('fallback', $._expression),
+    )),
+  },
+});
--- a/editors/tree-sitter-decodal/package-lock.json
+++ b/editors/tree-sitter-decodal/package-lock.json
@ -0,0 +1,27 @@
+{
+  "name": "tree-sitter-decodal",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "tree-sitter-decodal",
+      "version": "0.1.0",
+      "license": "MIT",
+      "devDependencies": {
+        "tree-sitter-cli": "^0.22.6"
+      }
+    },
+    "node_modules/tree-sitter-cli": {
+      "version": "0.22.6",
+      "resolved": "https://registry.npmjs.org/tree-sitter-cli/-/tree-sitter-cli-0.22.6.tgz",
+      "integrity": "sha512-s7mYOJXi8sIFkt/nLJSqlYZP96VmKTc3BAwIX0rrrlRxWjWuCwixFqwzxWZBQz4R8Hx01iP7z3cT3ih58BUmZQ==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "bin": {
+        "tree-sitter": "cli.js"
+      }
+    }
+  }
+}
--- a/editors/tree-sitter-decodal/package.json
+++ b/editors/tree-sitter-decodal/package.json
@ -0,0 +1,50 @@
+{
+  "name": "tree-sitter-decodal",
+  "version": "0.1.0",
+  "description": "Tree-sitter grammar for Decodal / DCDL",
+  "main": "grammar.js",
+  "types": "bindings/node",
+  "keywords": [
+    "tree-sitter",
+    "decodal",
+    "dcdl"
+  ],
+  "files": [
+    "grammar.js",
+    "binding.gyp",
+    "prebuilds/**",
+    "bindings/node/*",
+    "queries/*",
+    "src/**"
+  ],
+  "license": "MIT",
+  "tree-sitter": [
+    {
+      "scope": "source.dcdl",
+      "file-types": [
+        "dcdl"
+      ]
+    }
+  ],
+  "devDependencies": {
+    "tree-sitter-cli": "^0.22.6",
+    "prebuildify": "^6.0.0"
+  },
+  "scripts": {
+    "generate": "tree-sitter generate",
+    "test": "tree-sitter test",
+    "install": "node-gyp-build",
+    "prebuildify": "prebuildify --napi --strip"
+  },
+  "dependencies": {
+    "node-gyp-build": "^4.8.0"
+  },
+  "peerDependencies": {
+    "tree-sitter": "^0.21.0"
+  },
+  "peerDependenciesMeta": {
+    "tree_sitter": {
+      "optional": true
+    }
+  }
+}
--- a/editors/tree-sitter-decodal/pyproject.toml
+++ b/editors/tree-sitter-decodal/pyproject.toml
@ -0,0 +1,29 @@
+[build-system]
+requires = ["setuptools>=42", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "tree-sitter-decodal"
+description = "Decodal grammar for tree-sitter"
+version = "0.0.1"
+keywords = ["incremental", "parsing", "tree-sitter", "decodal"]
+classifiers = [
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Topic :: Software Development :: Compilers",
+  "Topic :: Text Processing :: Linguistic",
+  "Typing :: Typed"
+]
+requires-python = ">=3.8"
+license.text = "MIT"
+readme = "README.md"
+
+[project.urls]
+Homepage = "https://github.com/tree-sitter/tree-sitter-decodal"
+
+[project.optional-dependencies]
+core = ["tree-sitter~=0.21"]
+
+[tool.cibuildwheel]
+build = "cp38-*"
+build-frontend = "build"
--- a/editors/tree-sitter-decodal/queries/highlights.scm
+++ b/editors/tree-sitter-decodal/queries/highlights.scm
@ -0,0 +1,58 @@
+(comment) @comment
+
+(string) @string
+(regex_literal) @string.regexp
+(integer) @number
+(float) @number
+(boolean) @boolean
+
+[
+  "let"
+  "in"
+  "match"
+  "import"
+  "default"
+] @keyword
+
+[
+  "&"
+  "//"
+  "=>"
+  "="
+  ">"
+  ">="
+  "<"
+  "<="
+] @operator
+
+[
+  "{"
+  "}"
+  "["
+  "]"
+  "("
+  ")"
+] @punctuation.bracket
+
+[
+  ";"
+  ","
+  "."
+  ":"
+] @punctuation.delimiter
+
+((identifier) @type.builtin
+ (#match? @type.builtin "^(String|Int|Float|Bool)$"))
+
+(field_definition
+  path: (field_path (identifier) @property))
+
+(path_expression
+  field: (identifier) @property)
+
+(parameter
+  name: (identifier) @variable.parameter)
+
+(function_expression) @function
+(call_expression
+  function: (identifier) @function.call)
--- a/editors/tree-sitter-decodal/queries/locals.scm
+++ b/editors/tree-sitter-decodal/queries/locals.scm
@ -0,0 +1,3 @@
+(parameter name: (identifier) @local.definition)
+(field_definition path: (field_path (identifier) @local.definition))
+(identifier) @local.reference
--- a/editors/tree-sitter-decodal/setup.py
+++ b/editors/tree-sitter-decodal/setup.py
@ -0,0 +1,60 @@
+from os.path import isdir, join
+from platform import system
+
+from setuptools import Extension, find_packages, setup
+from setuptools.command.build import build
+from wheel.bdist_wheel import bdist_wheel
+
+
+class Build(build):
+    def run(self):
+        if isdir("queries"):
+            dest = join(self.build_lib, "tree_sitter_decodal", "queries")
+            self.copy_tree("queries", dest)
+        super().run()
+
+
+class BdistWheel(bdist_wheel):
+    def get_tag(self):
+        python, abi, platform = super().get_tag()
+        if python.startswith("cp"):
+            python, abi = "cp38", "abi3"
+        return python, abi, platform
+
+
+setup(
+    packages=find_packages("bindings/python"),
+    package_dir={"": "bindings/python"},
+    package_data={
+        "tree_sitter_decodal": ["*.pyi", "py.typed"],
+        "tree_sitter_decodal.queries": ["*.scm"],
+    },
+    ext_package="tree_sitter_decodal",
+    ext_modules=[
+        Extension(
+            name="_binding",
+            sources=[
+                "bindings/python/tree_sitter_decodal/binding.c",
+                "src/parser.c",
+                # NOTE: if your language uses an external scanner, add it here.
+            ],
+            extra_compile_args=[
+                "-std=c11",
+            ] if system() != "Windows" else [
+                "/std:c11",
+                "/utf-8",
+            ],
+            define_macros=[
+                ("Py_LIMITED_API", "0x03080000"),
+                ("PY_SSIZE_T_CLEAN", None)
+            ],
+            include_dirs=["src"],
+            py_limited_api=True,
+        )
+    ],
+    cmdclass={
+        "build": Build,
+        "bdist_wheel": BdistWheel
+    },
+    zip_safe=False
+)
--- a/editors/tree-sitter-decodal/src/grammar.json
+++ b/editors/tree-sitter-decodal/src/grammar.json
@ -0,0 +1,991 @@
+{
+  "name": "decodal",
+  "word": "identifier",
+  "rules": {
+    "source_file": {
+      "type": "REPEAT",
+      "content": {
+        "type": "SYMBOL",
+        "name": "_statement"
+      }
+    },
+    "_statement": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "field_definition"
+            },
+            {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "STRING",
+                  "value": ";"
+                },
+                {
+                  "type": "BLANK"
+                }
+              ]
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "_expression"
+            },
+            {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "STRING",
+                  "value": ";"
+                },
+                {
+                  "type": "BLANK"
+                }
+              ]
+            }
+          ]
+        }
+      ]
+    },
+    "comment": {
+      "type": "TOKEN",
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "#"
+          },
+          {
+            "type": "PATTERN",
+            "value": ".*"
+          }
+        ]
+      }
+    },
+    "_expression": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "literal"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "identifier"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "regex_literal"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "comparison_constraint"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "object"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "array"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "let_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "function_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "match_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "import_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "parenthesized_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "call_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "path_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "binary_expression"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "default_expression"
+        }
+      ]
+    },
+    "literal": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "string"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "integer"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "float"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "boolean"
+        }
+      ]
+    },
+    "boolean": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "true"
+        },
+        {
+          "type": "STRING",
+          "value": "false"
+        }
+      ]
+    },
+    "string": {
+      "type": "TOKEN",
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "\""
+          },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "PATTERN",
+                  "value": "[^\"\\\\\\n]"
+                },
+                {
+                  "type": "PATTERN",
+                  "value": "\\\\."
+                }
+              ]
+            }
+          },
+          {
+            "type": "STRING",
+            "value": "\""
+          }
+        ]
+      }
+    },
+    "integer": {
+      "type": "TOKEN",
+      "content": {
+        "type": "PATTERN",
+        "value": "[0-9]+"
+      }
+    },
+    "float": {
+      "type": "TOKEN",
+      "content": {
+        "type": "PATTERN",
+        "value": "[0-9]+\\.[0-9]+"
+      }
+    },
+    "identifier": {
+      "type": "PATTERN",
+      "value": "[A-Za-z][A-Za-z0-9_]*"
+    },
+    "regex_literal": {
+      "type": "TOKEN",
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "/"
+          },
+          {
+            "type": "REPEAT1",
+            "content": {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "PATTERN",
+                  "value": "[^\\/\\\\\\n]"
+                },
+                {
+                  "type": "PATTERN",
+                  "value": "\\\\."
+                }
+              ]
+            }
+          },
+          {
+            "type": "STRING",
+            "value": "/"
+          }
+        ]
+      }
+    },
+    "object": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "{"
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "field_definition"
+                },
+                {
+                  "type": "REPEAT",
+                  "content": {
+                    "type": "SEQ",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ";"
+                      },
+                      {
+                        "type": "SYMBOL",
+                        "name": "field_definition"
+                      }
+                    ]
+                  }
+                },
+                {
+                  "type": "CHOICE",
+                  "members": [
+                    {
+                      "type": "STRING",
+                      "value": ";"
+                    },
+                    {
+                      "type": "BLANK"
+                    }
+                  ]
+                }
+              ]
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "STRING",
+          "value": "}"
+        }
+      ]
+    },
+    "field_definition": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "FIELD",
+          "name": "path",
+          "content": {
+            "type": "SYMBOL",
+            "name": "field_path"
+          }
+        },
+        {
+          "type": "STRING",
+          "value": "="
+        },
+        {
+          "type": "FIELD",
+          "name": "value",
+          "content": {
+            "type": "SYMBOL",
+            "name": "_expression"
+          }
+        }
+      ]
+    },
+    "field_path": {
+      "type": "PREC",
+      "value": 10,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "SYMBOL",
+            "name": "identifier"
+          },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "STRING",
+                  "value": "."
+                },
+                {
+                  "type": "SYMBOL",
+                  "name": "identifier"
+                }
+              ]
+            }
+          }
+        ]
+      }
+    },
+    "array": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "["
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "_expression"
+                },
+                {
+                  "type": "REPEAT",
+                  "content": {
+                    "type": "SEQ",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ","
+                      },
+                      {
+                        "type": "SYMBOL",
+                        "name": "_expression"
+                      }
+                    ]
+                  }
+                },
+                {
+                  "type": "CHOICE",
+                  "members": [
+                    {
+                      "type": "STRING",
+                      "value": ","
+                    },
+                    {
+                      "type": "BLANK"
+                    }
+                  ]
+                }
+              ]
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "STRING",
+          "value": "]"
+        }
+      ]
+    },
+    "let_expression": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "let"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "SEQ",
+            "members": [
+              {
+                "type": "SYMBOL",
+                "name": "field_definition"
+              },
+              {
+                "type": "STRING",
+                "value": ";"
+              }
+            ]
+          }
+        },
+        {
+          "type": "STRING",
+          "value": "in"
+        },
+        {
+          "type": "FIELD",
+          "name": "body",
+          "content": {
+            "type": "SYMBOL",
+            "name": "_expression"
+          }
+        }
+      ]
+    },
+    "function_expression": {
+      "type": "PREC_RIGHT",
+      "value": 0,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "("
+          },
+          {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SEQ",
+                "members": [
+                  {
+                    "type": "SYMBOL",
+                    "name": "parameter"
+                  },
+                  {
+                    "type": "REPEAT",
+                    "content": {
+                      "type": "SEQ",
+                      "members": [
+                        {
+                          "type": "STRING",
+                          "value": ","
+                        },
+                        {
+                          "type": "SYMBOL",
+                          "name": "parameter"
+                        }
+                      ]
+                    }
+                  },
+                  {
+                    "type": "CHOICE",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ","
+                      },
+                      {
+                        "type": "BLANK"
+                      }
+                    ]
+                  }
+                ]
+              },
+              {
+                "type": "BLANK"
+              }
+            ]
+          },
+          {
+            "type": "STRING",
+            "value": ")"
+          },
+          {
+            "type": "STRING",
+            "value": "=>"
+          },
+          {
+            "type": "FIELD",
+            "name": "body",
+            "content": {
+              "type": "SYMBOL",
+              "name": "_expression"
+            }
+          }
+        ]
+      }
+    },
+    "parameter": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "FIELD",
+          "name": "name",
+          "content": {
+            "type": "SYMBOL",
+            "name": "identifier"
+          }
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "STRING",
+                  "value": ":"
+                },
+                {
+                  "type": "FIELD",
+                  "name": "constraint",
+                  "content": {
+                    "type": "SYMBOL",
+                    "name": "_expression"
+                  }
+                }
+              ]
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        }
+      ]
+    },
+    "match_expression": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "match"
+        },
+        {
+          "type": "FIELD",
+          "name": "scrutinee",
+          "content": {
+            "type": "SYMBOL",
+            "name": "_expression"
+          }
+        },
+        {
+          "type": "STRING",
+          "value": "{"
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SEQ",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "match_arm"
+                },
+                {
+                  "type": "REPEAT",
+                  "content": {
+                    "type": "SEQ",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ";"
+                      },
+                      {
+                        "type": "SYMBOL",
+                        "name": "match_arm"
+                      }
+                    ]
+                  }
+                },
+                {
+                  "type": "CHOICE",
+                  "members": [
+                    {
+                      "type": "STRING",
+                      "value": ";"
+                    },
+                    {
+                      "type": "BLANK"
+                    }
+                  ]
+                }
+              ]
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "STRING",
+          "value": "}"
+        }
+      ]
+    },
+    "match_arm": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "FIELD",
+          "name": "pattern",
+          "content": {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "STRING",
+                "value": "_"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_expression"
+              }
+            ]
+          }
+        },
+        {
+          "type": "STRING",
+          "value": ":"
+        },
+        {
+          "type": "FIELD",
+          "name": "body",
+          "content": {
+            "type": "SYMBOL",
+            "name": "_expression"
+          }
+        }
+      ]
+    },
+    "import_expression": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "import"
+        },
+        {
+          "type": "FIELD",
+          "name": "specifier",
+          "content": {
+            "type": "SYMBOL",
+            "name": "string"
+          }
+        }
+      ]
+    },
+    "parenthesized_expression": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "("
+        },
+        {
+          "type": "SYMBOL",
+          "name": "_expression"
+        },
+        {
+          "type": "STRING",
+          "value": ")"
+        }
+      ]
+    },
+    "call_expression": {
+      "type": "PREC_LEFT",
+      "value": 7,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "FIELD",
+            "name": "function",
+            "content": {
+              "type": "SYMBOL",
+              "name": "_expression"
+            }
+          },
+          {
+            "type": "STRING",
+            "value": "("
+          },
+          {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SEQ",
+                "members": [
+                  {
+                    "type": "SYMBOL",
+                    "name": "_expression"
+                  },
+                  {
+                    "type": "REPEAT",
+                    "content": {
+                      "type": "SEQ",
+                      "members": [
+                        {
+                          "type": "STRING",
+                          "value": ","
+                        },
+                        {
+                          "type": "SYMBOL",
+                          "name": "_expression"
+                        }
+                      ]
+                    }
+                  },
+                  {
+                    "type": "CHOICE",
+                    "members": [
+                      {
+                        "type": "STRING",
+                        "value": ","
+                      },
+                      {
+                        "type": "BLANK"
+                      }
+                    ]
+                  }
+                ]
+              },
+              {
+                "type": "BLANK"
+              }
+            ]
+          },
+          {
+            "type": "STRING",
+            "value": ")"
+          }
+        ]
+      }
+    },
+    "path_expression": {
+      "type": "PREC_LEFT",
+      "value": 8,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "FIELD",
+            "name": "object",
+            "content": {
+              "type": "SYMBOL",
+              "name": "_expression"
+            }
+          },
+          {
+            "type": "STRING",
+            "value": "."
+          },
+          {
+            "type": "FIELD",
+            "name": "field",
+            "content": {
+              "type": "SYMBOL",
+              "name": "identifier"
+            }
+          }
+        ]
+      }
+    },
+    "comparison_constraint": {
+      "type": "PREC",
+      "value": 6,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "FIELD",
+            "name": "operator",
+            "content": {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "STRING",
+                  "value": ">"
+                },
+                {
+                  "type": "STRING",
+                  "value": ">="
+                },
+                {
+                  "type": "STRING",
+                  "value": "<"
+                },
+                {
+                  "type": "STRING",
+                  "value": "<="
+                }
+              ]
+            }
+          },
+          {
+            "type": "FIELD",
+            "name": "value",
+            "content": {
+              "type": "CHOICE",
+              "members": [
+                {
+                  "type": "SYMBOL",
+                  "name": "integer"
+                },
+                {
+                  "type": "SYMBOL",
+                  "name": "float"
+                }
+              ]
+            }
+          }
+        ]
+      }
+    },
+    "binary_expression": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "PREC_LEFT",
+          "value": 3,
+          "content": {
+            "type": "SEQ",
+            "members": [
+              {
+                "type": "FIELD",
+                "name": "left",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "_expression"
+                }
+              },
+              {
+                "type": "FIELD",
+                "name": "operator",
+                "content": {
+                  "type": "STRING",
+                  "value": "&"
+                }
+              },
+              {
+                "type": "FIELD",
+                "name": "right",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "_expression"
+                }
+              }
+            ]
+          }
+        },
+        {
+          "type": "PREC_LEFT",
+          "value": 2,
+          "content": {
+            "type": "SEQ",
+            "members": [
+              {
+                "type": "FIELD",
+                "name": "left",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "_expression"
+                }
+              },
+              {
+                "type": "FIELD",
+                "name": "operator",
+                "content": {
+                  "type": "TOKEN",
+                  "content": {
+                    "type": "PREC",
+                    "value": 2,
+                    "content": {
+                      "type": "STRING",
+                      "value": "//"
+                    }
+                  }
+                }
+              },
+              {
+                "type": "FIELD",
+                "name": "right",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "_expression"
+                }
+              }
+            ]
+          }
+        }
+      ]
+    },
+    "default_expression": {
+      "type": "PREC_RIGHT",
+      "value": 1,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "FIELD",
+            "name": "base",
+            "content": {
+              "type": "SYMBOL",
+              "name": "_expression"
+            }
+          },
+          {
+            "type": "STRING",
+            "value": "default"
+          },
+          {
+            "type": "FIELD",
+            "name": "fallback",
+            "content": {
+              "type": "SYMBOL",
+              "name": "_expression"
+            }
+          }
+        ]
+      }
+    }
+  },
+  "extras": [
+    {
+      "type": "PATTERN",
+      "value": "[\\s\\uFEFF\\u2060\\u200B]"
+    },
+    {
+      "type": "SYMBOL",
+      "name": "comment"
+    }
+  ],
+  "conflicts": [
+    [
+      "_expression",
+      "parameter"
+    ]
+  ],
+  "precedences": [],
+  "externals": [],
+  "inline": [],
+  "supertypes": []
+}
--- a/editors/tree-sitter-decodal/src/node-types.json
+++ b/editors/tree-sitter-decodal/src/node-types.json
--- a/editors/tree-sitter-decodal/src/parser.c
+++ b/editors/tree-sitter-decodal/src/parser.c
--- a/editors/tree-sitter-decodal/src/tree_sitter/alloc.h
+++ b/editors/tree-sitter-decodal/src/tree_sitter/alloc.h
@ -0,0 +1,54 @@
+#ifndef TREE_SITTER_ALLOC_H_
+#define TREE_SITTER_ALLOC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// Allow clients to override allocation functions
+#ifdef TREE_SITTER_REUSE_ALLOCATOR
+
+extern void *(*ts_current_malloc)(size_t);
+extern void *(*ts_current_calloc)(size_t, size_t);
+extern void *(*ts_current_realloc)(void *, size_t);
+extern void (*ts_current_free)(void *);
+
+#ifndef ts_malloc
+#define ts_malloc  ts_current_malloc
+#endif
+#ifndef ts_calloc
+#define ts_calloc  ts_current_calloc
+#endif
+#ifndef ts_realloc
+#define ts_realloc ts_current_realloc
+#endif
+#ifndef ts_free
+#define ts_free    ts_current_free
+#endif
+
+#else
+
+#ifndef ts_malloc
+#define ts_malloc  malloc
+#endif
+#ifndef ts_calloc
+#define ts_calloc  calloc
+#endif
+#ifndef ts_realloc
+#define ts_realloc realloc
+#endif
+#ifndef ts_free
+#define ts_free    free
+#endif
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // TREE_SITTER_ALLOC_H_
--- a/editors/tree-sitter-decodal/src/tree_sitter/array.h
+++ b/editors/tree-sitter-decodal/src/tree_sitter/array.h
@ -0,0 +1,290 @@
+#ifndef TREE_SITTER_ARRAY_H_
+#define TREE_SITTER_ARRAY_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "./alloc.h"
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _MSC_VER
+#pragma warning(disable : 4101)
+#elif defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-variable"
+#endif
+
+#define Array(T)       \
+  struct {             \
+    T *contents;       \
+    uint32_t size;     \
+    uint32_t capacity; \
+  }
+
+/// Initialize an array.
+#define array_init(self) \
+  ((self)->size = 0, (self)->capacity = 0, (self)->contents = NULL)
+
+/// Create an empty array.
+#define array_new() \
+  { NULL, 0, 0 }
+
+/// Get a pointer to the element at a given `index` in the array.
+#define array_get(self, _index) \
+  (assert((uint32_t)(_index) < (self)->size), &(self)->contents[_index])
+
+/// Get a pointer to the first element in the array.
+#define array_front(self) array_get(self, 0)
+
+/// Get a pointer to the last element in the array.
+#define array_back(self) array_get(self, (self)->size - 1)
+
+/// Clear the array, setting its size to zero. Note that this does not free any
+/// memory allocated for the array's contents.
+#define array_clear(self) ((self)->size = 0)
+
+/// Reserve `new_capacity` elements of space in the array. If `new_capacity` is
+/// less than the array's current capacity, this function has no effect.
+#define array_reserve(self, new_capacity) \
+  _array__reserve((Array *)(self), array_elem_size(self), new_capacity)
+
+/// Free any memory allocated for this array. Note that this does not free any
+/// memory allocated for the array's contents.
+#define array_delete(self) _array__delete((Array *)(self))
+
+/// Push a new `element` onto the end of the array.
+#define array_push(self, element)                            \
+  (_array__grow((Array *)(self), 1, array_elem_size(self)), \
+   (self)->contents[(self)->size++] = (element))
+
+/// Increase the array's size by `count` elements.
+/// New elements are zero-initialized.
+#define array_grow_by(self, count) \
+  do { \
+    if ((count) == 0) break; \
+    _array__grow((Array *)(self), count, array_elem_size(self)); \
+    memset((self)->contents + (self)->size, 0, (count) * array_elem_size(self)); \
+    (self)->size += (count); \
+  } while (0)
+
+/// Append all elements from one array to the end of another.
+#define array_push_all(self, other)                                       \
+  array_extend((self), (other)->size, (other)->contents)
+
+/// Append `count` elements to the end of the array, reading their values from the
+/// `contents` pointer.
+#define array_extend(self, count, contents)                    \
+  _array__splice(                                               \
+    (Array *)(self), array_elem_size(self), (self)->size, \
+    0, count,  contents                                        \
+  )
+
+/// Remove `old_count` elements from the array starting at the given `index`. At
+/// the same index, insert `new_count` new elements, reading their values from the
+/// `new_contents` pointer.
+#define array_splice(self, _index, old_count, new_count, new_contents)  \
+  _array__splice(                                                       \
+    (Array *)(self), array_elem_size(self), _index,                \
+    old_count, new_count, new_contents                                 \
+  )
+
+/// Insert one `element` into the array at the given `index`.
+#define array_insert(self, _index, element) \
+  _array__splice((Array *)(self), array_elem_size(self), _index, 0, 1, &(element))
+
+/// Remove one element from the array at the given `index`.
+#define array_erase(self, _index) \
+  _array__erase((Array *)(self), array_elem_size(self), _index)
+
+/// Pop the last element off the array, returning the element by value.
+#define array_pop(self) ((self)->contents[--(self)->size])
+
+/// Assign the contents of one array to another, reallocating if necessary.
+#define array_assign(self, other) \
+  _array__assign((Array *)(self), (const Array *)(other), array_elem_size(self))
+
+/// Swap one array with another
+#define array_swap(self, other) \
+  _array__swap((Array *)(self), (Array *)(other))
+
+/// Get the size of the array contents
+#define array_elem_size(self) (sizeof *(self)->contents)
+
+/// Search a sorted array for a given `needle` value, using the given `compare`
+/// callback to determine the order.
+///
+/// If an existing element is found to be equal to `needle`, then the `index`
+/// out-parameter is set to the existing value's index, and the `exists`
+/// out-parameter is set to true. Otherwise, `index` is set to an index where
+/// `needle` should be inserted in order to preserve the sorting, and `exists`
+/// is set to false.
+#define array_search_sorted_with(self, compare, needle, _index, _exists) \
+  _array__search_sorted(self, 0, compare, , needle, _index, _exists)
+
+/// Search a sorted array for a given `needle` value, using integer comparisons
+/// of a given struct field (specified with a leading dot) to determine the order.
+///
+/// See also `array_search_sorted_with`.
+#define array_search_sorted_by(self, field, needle, _index, _exists) \
+  _array__search_sorted(self, 0, _compare_int, field, needle, _index, _exists)
+
+/// Insert a given `value` into a sorted array, using the given `compare`
+/// callback to determine the order.
+#define array_insert_sorted_with(self, compare, value) \
+  do { \
+    unsigned _index, _exists; \
+    array_search_sorted_with(self, compare, &(value), &_index, &_exists); \
+    if (!_exists) array_insert(self, _index, value); \
+  } while (0)
+
+/// Insert a given `value` into a sorted array, using integer comparisons of
+/// a given struct field (specified with a leading dot) to determine the order.
+///
+/// See also `array_search_sorted_by`.
+#define array_insert_sorted_by(self, field, value) \
+  do { \
+    unsigned _index, _exists; \
+    array_search_sorted_by(self, field, (value) field, &_index, &_exists); \
+    if (!_exists) array_insert(self, _index, value); \
+  } while (0)
+
+// Private
+
+typedef Array(void) Array;
+
+/// This is not what you're looking for, see `array_delete`.
+static inline void _array__delete(Array *self) {
+  if (self->contents) {
+    ts_free(self->contents);
+    self->contents = NULL;
+    self->size = 0;
+    self->capacity = 0;
+  }
+}
+
+/// This is not what you're looking for, see `array_erase`.
+static inline void _array__erase(Array *self, size_t element_size,
+                                uint32_t index) {
+  assert(index < self->size);
+  char *contents = (char *)self->contents;
+  memmove(contents + index * element_size, contents + (index + 1) * element_size,
+          (self->size - index - 1) * element_size);
+  self->size--;
+}
+
+/// This is not what you're looking for, see `array_reserve`.
+static inline void _array__reserve(Array *self, size_t element_size, uint32_t new_capacity) {
+  if (new_capacity > self->capacity) {
+    if (self->contents) {
+      self->contents = ts_realloc(self->contents, new_capacity * element_size);
+    } else {
+      self->contents = ts_malloc(new_capacity * element_size);
+    }
+    self->capacity = new_capacity;
+  }
+}
+
+/// This is not what you're looking for, see `array_assign`.
+static inline void _array__assign(Array *self, const Array *other, size_t element_size) {
+  _array__reserve(self, element_size, other->size);
+  self->size = other->size;
+  memcpy(self->contents, other->contents, self->size * element_size);
+}
+
+/// This is not what you're looking for, see `array_swap`.
+static inline void _array__swap(Array *self, Array *other) {
+  Array swap = *other;
+  *other = *self;
+  *self = swap;
+}
+
+/// This is not what you're looking for, see `array_push` or `array_grow_by`.
+static inline void _array__grow(Array *self, uint32_t count, size_t element_size) {
+  uint32_t new_size = self->size + count;
+  if (new_size > self->capacity) {
+    uint32_t new_capacity = self->capacity * 2;
+    if (new_capacity < 8) new_capacity = 8;
+    if (new_capacity < new_size) new_capacity = new_size;
+    _array__reserve(self, element_size, new_capacity);
+  }
+}
+
+/// This is not what you're looking for, see `array_splice`.
+static inline void _array__splice(Array *self, size_t element_size,
+                                 uint32_t index, uint32_t old_count,
+                                 uint32_t new_count, const void *elements) {
+  uint32_t new_size = self->size + new_count - old_count;
+  uint32_t old_end = index + old_count;
+  uint32_t new_end = index + new_count;
+  assert(old_end <= self->size);
+
+  _array__reserve(self, element_size, new_size);
+
+  char *contents = (char *)self->contents;
+  if (self->size > old_end) {
+    memmove(
+      contents + new_end * element_size,
+      contents + old_end * element_size,
+      (self->size - old_end) * element_size
+    );
+  }
+  if (new_count > 0) {
+    if (elements) {
+      memcpy(
+        (contents + index * element_size),
+        elements,
+        new_count * element_size
+      );
+    } else {
+      memset(
+        (contents + index * element_size),
+        0,
+        new_count * element_size
+      );
+    }
+  }
+  self->size += new_count - old_count;
+}
+
+/// A binary search routine, based on Rust's `std::slice::binary_search_by`.
+/// This is not what you're looking for, see `array_search_sorted_with` or `array_search_sorted_by`.
+#define _array__search_sorted(self, start, compare, suffix, needle, _index, _exists) \
+  do { \
+    *(_index) = start; \
+    *(_exists) = false; \
+    uint32_t size = (self)->size - *(_index); \
+    if (size == 0) break; \
+    int comparison; \
+    while (size > 1) { \
+      uint32_t half_size = size / 2; \
+      uint32_t mid_index = *(_index) + half_size; \
+      comparison = compare(&((self)->contents[mid_index] suffix), (needle)); \
+      if (comparison <= 0) *(_index) = mid_index; \
+      size -= half_size; \
+    } \
+    comparison = compare(&((self)->contents[*(_index)] suffix), (needle)); \
+    if (comparison == 0) *(_exists) = true; \
+    else if (comparison < 0) *(_index) += 1; \
+  } while (0)
+
+/// Helper macro for the `_sorted_by` routines below. This takes the left (existing)
+/// parameter by reference in order to work with the generic sorting function above.
+#define _compare_int(a, b) ((int)*(a) - (int)(b))
+
+#ifdef _MSC_VER
+#pragma warning(default : 4101)
+#elif defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TREE_SITTER_ARRAY_H_
--- a/editors/tree-sitter-decodal/src/tree_sitter/parser.h
+++ b/editors/tree-sitter-decodal/src/tree_sitter/parser.h
@ -0,0 +1,265 @@
+#ifndef TREE_SITTER_PARSER_H_
+#define TREE_SITTER_PARSER_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#define ts_builtin_sym_error ((TSSymbol)-1)
+#define ts_builtin_sym_end 0
+#define TREE_SITTER_SERIALIZATION_BUFFER_SIZE 1024
+
+#ifndef TREE_SITTER_API_H_
+typedef uint16_t TSStateId;
+typedef uint16_t TSSymbol;
+typedef uint16_t TSFieldId;
+typedef struct TSLanguage TSLanguage;
+#endif
+
+typedef struct {
+  TSFieldId field_id;
+  uint8_t child_index;
+  bool inherited;
+} TSFieldMapEntry;
+
+typedef struct {
+  uint16_t index;
+  uint16_t length;
+} TSFieldMapSlice;
+
+typedef struct {
+  bool visible;
+  bool named;
+  bool supertype;
+} TSSymbolMetadata;
+
+typedef struct TSLexer TSLexer;
+
+struct TSLexer {
+  int32_t lookahead;
+  TSSymbol result_symbol;
+  void (*advance)(TSLexer *, bool);
+  void (*mark_end)(TSLexer *);
+  uint32_t (*get_column)(TSLexer *);
+  bool (*is_at_included_range_start)(const TSLexer *);
+  bool (*eof)(const TSLexer *);
+};
+
+typedef enum {
+  TSParseActionTypeShift,
+  TSParseActionTypeReduce,
+  TSParseActionTypeAccept,
+  TSParseActionTypeRecover,
+} TSParseActionType;
+
+typedef union {
+  struct {
+    uint8_t type;
+    TSStateId state;
+    bool extra;
+    bool repetition;
+  } shift;
+  struct {
+    uint8_t type;
+    uint8_t child_count;
+    TSSymbol symbol;
+    int16_t dynamic_precedence;
+    uint16_t production_id;
+  } reduce;
+  uint8_t type;
+} TSParseAction;
+
+typedef struct {
+  uint16_t lex_state;
+  uint16_t external_lex_state;
+} TSLexMode;
+
+typedef union {
+  TSParseAction action;
+  struct {
+    uint8_t count;
+    bool reusable;
+  } entry;
+} TSParseActionEntry;
+
+typedef struct {
+  int32_t start;
+  int32_t end;
+} TSCharacterRange;
+
+struct TSLanguage {
+  uint32_t version;
+  uint32_t symbol_count;
+  uint32_t alias_count;
+  uint32_t token_count;
+  uint32_t external_token_count;
+  uint32_t state_count;
+  uint32_t large_state_count;
+  uint32_t production_id_count;
+  uint32_t field_count;
+  uint16_t max_alias_sequence_length;
+  const uint16_t *parse_table;
+  const uint16_t *small_parse_table;
+  const uint32_t *small_parse_table_map;
+  const TSParseActionEntry *parse_actions;
+  const char * const *symbol_names;
+  const char * const *field_names;
+  const TSFieldMapSlice *field_map_slices;
+  const TSFieldMapEntry *field_map_entries;
+  const TSSymbolMetadata *symbol_metadata;
+  const TSSymbol *public_symbol_map;
+  const uint16_t *alias_map;
+  const TSSymbol *alias_sequences;
+  const TSLexMode *lex_modes;
+  bool (*lex_fn)(TSLexer *, TSStateId);
+  bool (*keyword_lex_fn)(TSLexer *, TSStateId);
+  TSSymbol keyword_capture_token;
+  struct {
+    const bool *states;
+    const TSSymbol *symbol_map;
+    void *(*create)(void);
+    void (*destroy)(void *);
+    bool (*scan)(void *, TSLexer *, const bool *symbol_whitelist);
+    unsigned (*serialize)(void *, char *);
+    void (*deserialize)(void *, const char *, unsigned);
+  } external_scanner;
+  const TSStateId *primary_state_ids;
+};
+
+static inline bool set_contains(TSCharacterRange *ranges, uint32_t len, int32_t lookahead) {
+  uint32_t index = 0;
+  uint32_t size = len - index;
+  while (size > 1) {
+    uint32_t half_size = size / 2;
+    uint32_t mid_index = index + half_size;
+    TSCharacterRange *range = &ranges[mid_index];
+    if (lookahead >= range->start && lookahead <= range->end) {
+      return true;
+    } else if (lookahead > range->end) {
+      index = mid_index;
+    }
+    size -= half_size;
+  }
+  TSCharacterRange *range = &ranges[index];
+  return (lookahead >= range->start && lookahead <= range->end);
+}
+
+/*
+ *  Lexer Macros
+ */
+
+#ifdef _MSC_VER
+#define UNUSED __pragma(warning(suppress : 4101))
+#else
+#define UNUSED __attribute__((unused))
+#endif
+
+#define START_LEXER()           \
+  bool result = false;          \
+  bool skip = false;            \
+  UNUSED                        \
+  bool eof = false;             \
+  int32_t lookahead;            \
+  goto start;                   \
+  next_state:                   \
+  lexer->advance(lexer, skip);  \
+  start:                        \
+  skip = false;                 \
+  lookahead = lexer->lookahead;
+
+#define ADVANCE(state_value) \
+  {                          \
+    state = state_value;     \
+    goto next_state;         \
+  }
+
+#define ADVANCE_MAP(...)                                              \
+  {                                                                   \
+    static const uint16_t map[] = { __VA_ARGS__ };                    \
+    for (uint32_t i = 0; i < sizeof(map) / sizeof(map[0]); i += 2) {  \
+      if (map[i] == lookahead) {                                      \
+        state = map[i + 1];                                           \
+        goto next_state;                                              \
+      }                                                               \
+    }                                                                 \
+  }
+
+#define SKIP(state_value) \
+  {                       \
+    skip = true;          \
+    state = state_value;  \
+    goto next_state;      \
+  }
+
+#define ACCEPT_TOKEN(symbol_value)     \
+  result = true;                       \
+  lexer->result_symbol = symbol_value; \
+  lexer->mark_end(lexer);
+
+#define END_STATE() return result;
+
+/*
+ *  Parse Table Macros
+ */
+
+#define SMALL_STATE(id) ((id) - LARGE_STATE_COUNT)
+
+#define STATE(id) id
+
+#define ACTIONS(id) id
+
+#define SHIFT(state_value)            \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .state = (state_value)          \
+    }                                 \
+  }}
+
+#define SHIFT_REPEAT(state_value)     \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .state = (state_value),         \
+      .repetition = true              \
+    }                                 \
+  }}
+
+#define SHIFT_EXTRA()                 \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .extra = true                   \
+    }                                 \
+  }}
+
+#define REDUCE(symbol_name, children, precedence, prod_id) \
+  {{                                                       \
+    .reduce = {                                            \
+      .type = TSParseActionTypeReduce,                     \
+      .symbol = symbol_name,                               \
+      .child_count = children,                             \
+      .dynamic_precedence = precedence,                    \
+      .production_id = prod_id                             \
+    },                                                     \
+  }}
+
+#define RECOVER()                    \
+  {{                                 \
+    .type = TSParseActionTypeRecover \
+  }}
+
+#define ACCEPT_INPUT()              \
+  {{                                \
+    .type = TSParseActionTypeAccept \
+  }}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TREE_SITTER_PARSER_H_