commit a2a7925e3ba87eba43e3c72a7029bf010ccd7d72
Author: Dmitriy Pleshevskiy <dmitriy@ideascup.me>
Date:   Sun Dec 4 00:07:26 2022 +0300

    initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f26b10a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+# direnv
+.envrc
+.direnv
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..9fe82ac
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,26 @@
+[package]
+name = "tree-sitter-d2"
+description = "d2 grammar for the tree-sitter parsing library"
+version = "0.0.1"
+keywords = ["incremental", "parsing", "d2"]
+categories = ["parsing", "text-editors"]
+repository = "https://github.com/tree-sitter/tree-sitter-d2"
+edition = "2018"
+license = "MIT"
+
+build = "bindings/rust/build.rs"
+include = [
+  "bindings/rust/*",
+  "grammar.js",
+  "queries/*",
+  "src/*",
+]
+
+[lib]
+path = "bindings/rust/lib.rs"
+
+[dependencies]
+tree-sitter = "~0.20.3"
+
+[build-dependencies]
+cc = "1.0"
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..44a0210
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+
+
+test: build
+	tree-sitter test
+
+build:
+	tree-sitter generate
diff --git a/binding.gyp b/binding.gyp
new file mode 100644
index 0000000..5fa1952
--- /dev/null
+++ b/binding.gyp
@@ -0,0 +1,20 @@
+{
+  "targets": [
+    {
+      "target_name": "tree_sitter_d2_binding",
+      "include_dirs": [
+        "<!(node -e \"require('nan')\")",
+        "src"
+      ],
+      "sources": [
+        "bindings/node/binding.cc",
+        "src/parser.c",
+        "src/scanner.c",
+        # If your language uses an external scanner, add it here.
+      ],
+      "cflags_c": [
+        "-std=c99",
+      ]
+    }
+  ]
+}
diff --git a/bindings/node/binding.cc b/bindings/node/binding.cc
new file mode 100644
index 0000000..6678c57
--- /dev/null
+++ b/bindings/node/binding.cc
@@ -0,0 +1,28 @@
+#include "tree_sitter/parser.h"
+#include <node.h>
+#include "nan.h"
+
+using namespace v8;
+
+extern "C" TSLanguage * tree_sitter_d2();
+
+namespace {
+
+NAN_METHOD(New) {}
+
+void Init(Local<Object> exports, Local<Object> module) {
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Language").ToLocalChecked());
+  tpl->InstanceTemplate()->SetInternalFieldCount(1);
+
+  Local<Function> constructor = Nan::GetFunction(tpl).ToLocalChecked();
+  Local<Object> instance = constructor->NewInstance(Nan::GetCurrentContext()).ToLocalChecked();
+  Nan::SetInternalFieldPointer(instance, 0, tree_sitter_d2());
+
+  Nan::Set(instance, Nan::New("name").ToLocalChecked(), Nan::New("d2").ToLocalChecked());
+  Nan::Set(module, Nan::New("exports").ToLocalChecked(), instance);
+}
+
+NODE_MODULE(tree_sitter_d2_binding, Init)
+
+}  // namespace
diff --git a/bindings/node/index.js b/bindings/node/index.js
new file mode 100644
index 0000000..46e96c8
--- /dev/null
+++ b/bindings/node/index.js
@@ -0,0 +1,19 @@
+try {
+  module.exports = require("../../build/Release/tree_sitter_d2_binding");
+} catch (error1) {
+  if (error1.code !== 'MODULE_NOT_FOUND') {
+    throw error1;
+  }
+  try {
+    module.exports = require("../../build/Debug/tree_sitter_d2_binding");
+  } catch (error2) {
+    if (error2.code !== 'MODULE_NOT_FOUND') {
+      throw error2;
+    }
+    throw error1
+  }
+}
+
+try {
+  module.exports.nodeTypeInfo = require("../../src/node-types.json");
+} catch (_) {}
diff --git a/bindings/rust/build.rs b/bindings/rust/build.rs
new file mode 100644
index 0000000..c6061f0
--- /dev/null
+++ b/bindings/rust/build.rs
@@ -0,0 +1,40 @@
+fn main() {
+    let src_dir = std::path::Path::new("src");
+
+    let mut c_config = cc::Build::new();
+    c_config.include(&src_dir);
+    c_config
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wno-unused-but-set-variable")
+        .flag_if_supported("-Wno-trigraphs");
+    let parser_path = src_dir.join("parser.c");
+    c_config.file(&parser_path);
+
+    // If your language uses an external scanner written in C,
+    // then include this block of code:
+
+    /*
+    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("parser");
+    println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());
+
+    // If your language uses an external scanner written in C++,
+    // then include this block of code:
+
+    /*
+    let mut cpp_config = cc::Build::new();
+    cpp_config.cpp(true);
+    cpp_config.include(&src_dir);
+    cpp_config
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wno-unused-but-set-variable");
+    let scanner_path = src_dir.join("scanner.cc");
+    cpp_config.file(&scanner_path);
+    cpp_config.compile("scanner");
+    println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
+    */
+}
diff --git a/bindings/rust/lib.rs b/bindings/rust/lib.rs
new file mode 100644
index 0000000..77d9048
--- /dev/null
+++ b/bindings/rust/lib.rs
@@ -0,0 +1,52 @@
+//! This crate provides d2 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 = "";
+//! let mut parser = tree_sitter::Parser::new();
+//! parser.set_language(tree_sitter_d2::language()).expect("Error loading d2 grammar");
+//! let tree = parser.parse(code, None).unwrap();
+//! ```
+//!
+//! [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_d2() -> 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_d2() }
+}
+
+/// 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: &'static str = include_str!("../../src/node-types.json");
+
+// Uncomment these to include any queries that this grammar contains
+
+// pub const HIGHLIGHTS_QUERY: &'static str = include_str!("../../queries/highlights.scm");
+// pub const INJECTIONS_QUERY: &'static str = include_str!("../../queries/injections.scm");
+// pub const LOCALS_QUERY: &'static str = include_str!("../../queries/locals.scm");
+// pub const TAGS_QUERY: &'static 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 d2 language");
+    }
+}
diff --git a/examples/all.d2 b/examples/all.d2
new file mode 100644
index 0000000..cd68e72
--- /dev/null
+++ b/examples/all.d2
@@ -0,0 +1,8 @@
+a <- b -- b
+b
+
+foo: Hello world {
+  shape: oval
+}
+
+hello world- -- foo
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..a6d455d
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1667395993,
+        "narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1669927173,
+        "narHash": "sha256-Z7rSKzC5OuWv5Q7RRNQPZb0jVJRJk0BJB6/fGZzaAIU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9063accddd2e68dcc71032459a58399e977374c9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..e9d2e5e
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,23 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            nodejs-18_x
+            tree-sitter
+            nodePackages.eslint
+            nodePackages.prettier
+            nodePackages.vscode-langservers-extracted # html, css, json, eslint
+          ];
+        };
+      });
+}
diff --git a/grammar.js b/grammar.js
new file mode 100644
index 0000000..68810d3
--- /dev/null
+++ b/grammar.js
@@ -0,0 +1,50 @@
+module.exports = grammar({
+  name: "d2",
+
+  externals: ($) => [$._identifier],
+
+  rules: {
+    // TODO: add the actual grammar rules
+    source_file: ($) => repeat($._definition),
+
+    _definition: ($) => choice($.connection, $.shape),
+
+    _end: ($) => choice(";", "\n"),
+
+    connection: ($) =>
+      seq(
+        field("left", $.identifier),
+        $.arrow,
+        field("right", $.identifier),
+        $._end
+      ),
+
+    shape: ($) =>
+      prec.left(
+        seq(
+          field("id", $.identifier),
+          optional(seq(":", field("label", $.label))),
+          $._end
+        )
+      ),
+
+    label: ($) => choice($.string, /[^\n{]+/),
+
+    identifier: ($) => $._identifier,
+
+    arrow: ($) =>
+      choice(
+        seq("--", repeat("-")),
+        seq("<-", repeat("-")),
+        seq("<-", repeat("-"), ">"),
+        seq(repeat("-"), "->")
+      ),
+
+    string: ($) =>
+      choice(
+        seq("'", repeat(token(/[^'\n]+/)), "'"),
+        seq('"', repeat(token(/[^'\n]+/)), '"'),
+        seq("`", repeat(token(/[^'\n]+/)), "`")
+      ),
+  },
+});
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..bf7bb76
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1943 @@
+{
+  "name": "tree-sitter-d2",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "tree-sitter-d2",
+      "version": "1.0.0",
+      "license": "ISC",
+      "devDependencies": {
+        "eslint": "^8.28.0",
+        "prettier": "^2.8.0"
+      }
+    },
+    "node_modules/@eslint/eslintrc": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-1.3.3.tgz",
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+      "dev": true,
+      "dependencies": {
+        "ajv": "^6.12.4",
+        "debug": "^4.3.2",
+        "espree": "^9.4.0",
+        "globals": "^13.15.0",
+        "ignore": "^5.2.0",
+        "import-fresh": "^3.2.1",
+        "js-yaml": "^4.1.0",
+        "minimatch": "^3.1.2",
+        "strip-json-comments": "^3.1.1"
+      },
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      }
+    },
+    "node_modules/@humanwhocodes/config-array": {
+      "version": "0.11.7",
+      "resolved": "https://registry.npmjs.org/@humanwhocodes/config-array/-/config-array-0.11.7.tgz",
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+      "dev": true,
+      "dependencies": {
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+        "debug": "^4.1.1",
+        "minimatch": "^3.0.5"
+      },
+      "engines": {
+        "node": ">=10.10.0"
+      }
+    },
+    "node_modules/@humanwhocodes/module-importer": {
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+      "dev": true,
+      "engines": {
+        "node": ">=12.22"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/nzakas"
+      }
+    },
+    "node_modules/@humanwhocodes/object-schema": {
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+      "dev": true
+    },
+    "node_modules/@nodelib/fs.scandir": {
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+      "dev": true,
+      "dependencies": {
+        "@nodelib/fs.stat": "2.0.5",
+        "run-parallel": "^1.1.9"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/@nodelib/fs.stat": {
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+      "dev": true,
+      "engines": {
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+      }
+    },
+    "node_modules/@nodelib/fs.walk": {
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+      "dev": true,
+      "dependencies": {
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+        "fastq": "^1.6.0"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/acorn": {
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+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.8.1.tgz",
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+      "dev": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "node_modules/acorn-jsx": {
+      "version": "5.3.2",
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+      "dev": true,
+      "peerDependencies": {
+        "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      }
+    },
+    "node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "dev": true,
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "dev": true,
+      "engines": {
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+      }
+    },
+    "node_modules/ansi-styles": {
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+      "dev": true,
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/argparse": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
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+      "dev": true
+    },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
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+      "dev": true
+    },
+    "node_modules/brace-expansion": {
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+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
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+      "dev": true,
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "node_modules/callsites": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
+      "integrity": "sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
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+    "strip-json-comments": {
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+      "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
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+      "dev": true,
+      "requires": {
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+      }
+    },
+    "type-fest": {
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+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz",
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+      "dev": true,
+      "requires": {
+        "punycode": "^2.1.0"
+      }
+    },
+    "which": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
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+      "dev": true,
+      "requires": {
+        "isexe": "^2.0.0"
+      }
+    },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
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+      "dev": true
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "dev": true
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..3764a72
--- /dev/null
+++ b/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "tree-sitter-d2",
+  "version": "1.0.0",
+  "description": "",
+  "main": "grammar.js",
+  "author": "",
+  "license": "ISC"
+}
diff --git a/src/grammar.json b/src/grammar.json
new file mode 100644
index 0000000..d0b4fd3
--- /dev/null
+++ b/src/grammar.json
@@ -0,0 +1,294 @@
+{
+  "name": "d2",
+  "rules": {
+    "source_file": {
+      "type": "REPEAT",
+      "content": {
+        "type": "SYMBOL",
+        "name": "_definition"
+      }
+    },
+    "_definition": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "connection"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "shape"
+        }
+      ]
+    },
+    "_end": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "STRING",
+          "value": ";"
+        },
+        {
+          "type": "STRING",
+          "value": "\n"
+        }
+      ]
+    },
+    "connection": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "FIELD",
+          "name": "left",
+          "content": {
+            "type": "SYMBOL",
+            "name": "identifier"
+          }
+        },
+        {
+          "type": "SYMBOL",
+          "name": "arrow"
+        },
+        {
+          "type": "FIELD",
+          "name": "right",
+          "content": {
+            "type": "SYMBOL",
+            "name": "identifier"
+          }
+        },
+        {
+          "type": "SYMBOL",
+          "name": "_end"
+        }
+      ]
+    },
+    "shape": {
+      "type": "PREC_LEFT",
+      "value": 0,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "FIELD",
+            "name": "id",
+            "content": {
+              "type": "SYMBOL",
+              "name": "identifier"
+            }
+          },
+          {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SEQ",
+                "members": [
+                  {
+                    "type": "STRING",
+                    "value": ":"
+                  },
+                  {
+                    "type": "FIELD",
+                    "name": "label",
+                    "content": {
+                      "type": "SYMBOL",
+                      "name": "label"
+                    }
+                  }
+                ]
+              },
+              {
+                "type": "BLANK"
+              }
+            ]
+          },
+          {
+            "type": "SYMBOL",
+            "name": "_end"
+          }
+        ]
+      }
+    },
+    "label": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "string"
+        },
+        {
+          "type": "PATTERN",
+          "value": "[^\\n{]+"
+        }
+      ]
+    },
+    "identifier": {
+      "type": "SYMBOL",
+      "name": "_identifier"
+    },
+    "arrow": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "--"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "STRING",
+                "value": "-"
+              }
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "<-"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "STRING",
+                "value": "-"
+              }
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "<-"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "STRING",
+                "value": "-"
+              }
+            },
+            {
+              "type": "STRING",
+              "value": ">"
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "STRING",
+                "value": "-"
+              }
+            },
+            {
+              "type": "STRING",
+              "value": "->"
+            }
+          ]
+        }
+      ]
+    },
+    "string": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "'"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "TOKEN",
+                "content": {
+                  "type": "PATTERN",
+                  "value": "[^'\\n]+"
+                }
+              }
+            },
+            {
+              "type": "STRING",
+              "value": "'"
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "\""
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "TOKEN",
+                "content": {
+                  "type": "PATTERN",
+                  "value": "[^'\\n]+"
+                }
+              }
+            },
+            {
+              "type": "STRING",
+              "value": "\""
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "STRING",
+              "value": "`"
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "TOKEN",
+                "content": {
+                  "type": "PATTERN",
+                  "value": "[^'\\n]+"
+                }
+              }
+            },
+            {
+              "type": "STRING",
+              "value": "`"
+            }
+          ]
+        }
+      ]
+    }
+  },
+  "extras": [
+    {
+      "type": "PATTERN",
+      "value": "\\s"
+    }
+  ],
+  "conflicts": [],
+  "precedences": [],
+  "externals": [
+    {
+      "type": "SYMBOL",
+      "name": "_identifier"
+    }
+  ],
+  "inline": [],
+  "supertypes": []
+}
+
diff --git a/src/node-types.json b/src/node-types.json
new file mode 100644
index 0000000..009cbb1
--- /dev/null
+++ b/src/node-types.json
@@ -0,0 +1,157 @@
+[
+  {
+    "type": "arrow",
+    "named": true,
+    "fields": {}
+  },
+  {
+    "type": "connection",
+    "named": true,
+    "fields": {
+      "left": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          }
+        ]
+      },
+      "right": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          }
+        ]
+      }
+    },
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "arrow",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "identifier",
+    "named": true,
+    "fields": {}
+  },
+  {
+    "type": "label",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": false,
+      "types": [
+        {
+          "type": "string",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "shape",
+    "named": true,
+    "fields": {
+      "id": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          }
+        ]
+      },
+      "label": {
+        "multiple": false,
+        "required": false,
+        "types": [
+          {
+            "type": "label",
+            "named": true
+          }
+        ]
+      }
+    }
+  },
+  {
+    "type": "source_file",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
+        {
+          "type": "connection",
+          "named": true
+        },
+        {
+          "type": "shape",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "string",
+    "named": true,
+    "fields": {}
+  },
+  {
+    "type": "\n",
+    "named": false
+  },
+  {
+    "type": "\"",
+    "named": false
+  },
+  {
+    "type": "'",
+    "named": false
+  },
+  {
+    "type": "-",
+    "named": false
+  },
+  {
+    "type": "--",
+    "named": false
+  },
+  {
+    "type": "->",
+    "named": false
+  },
+  {
+    "type": ":",
+    "named": false
+  },
+  {
+    "type": ";",
+    "named": false
+  },
+  {
+    "type": "<-",
+    "named": false
+  },
+  {
+    "type": ">",
+    "named": false
+  },
+  {
+    "type": "`",
+    "named": false
+  }
+]
\ No newline at end of file
diff --git a/src/parser.c b/src/parser.c
new file mode 100644
index 0000000..96a92f7
--- /dev/null
+++ b/src/parser.c
@@ -0,0 +1,994 @@
+#include <tree_sitter/parser.h>
+
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+#define LANGUAGE_VERSION 14
+#define STATE_COUNT 36
+#define LARGE_STATE_COUNT 2
+#define SYMBOL_COUNT 27
+#define ALIAS_COUNT 0
+#define TOKEN_COUNT 15
+#define EXTERNAL_TOKEN_COUNT 1
+#define FIELD_COUNT 4
+#define MAX_ALIAS_SEQUENCE_LENGTH 4
+#define PRODUCTION_ID_COUNT 4
+
+enum {
+  anon_sym_SEMI = 1,
+  anon_sym_LF = 2,
+  anon_sym_COLON = 3,
+  aux_sym_label_token1 = 4,
+  anon_sym_DASH_DASH = 5,
+  anon_sym_DASH = 6,
+  anon_sym_LT_DASH = 7,
+  anon_sym_GT = 8,
+  anon_sym_DASH_GT = 9,
+  anon_sym_SQUOTE = 10,
+  aux_sym_string_token1 = 11,
+  anon_sym_DQUOTE = 12,
+  anon_sym_BQUOTE = 13,
+  sym__identifier = 14,
+  sym_source_file = 15,
+  sym__definition = 16,
+  sym__end = 17,
+  sym_connection = 18,
+  sym_shape = 19,
+  sym_label = 20,
+  sym_identifier = 21,
+  sym_arrow = 22,
+  sym_string = 23,
+  aux_sym_source_file_repeat1 = 24,
+  aux_sym_arrow_repeat1 = 25,
+  aux_sym_string_repeat1 = 26,
+};
+
+static const char * const ts_symbol_names[] = {
+  [ts_builtin_sym_end] = "end",
+  [anon_sym_SEMI] = ";",
+  [anon_sym_LF] = "\n",
+  [anon_sym_COLON] = ":",
+  [aux_sym_label_token1] = "label_token1",
+  [anon_sym_DASH_DASH] = "--",
+  [anon_sym_DASH] = "-",
+  [anon_sym_LT_DASH] = "<-",
+  [anon_sym_GT] = ">",
+  [anon_sym_DASH_GT] = "->",
+  [anon_sym_SQUOTE] = "'",
+  [aux_sym_string_token1] = "string_token1",
+  [anon_sym_DQUOTE] = "\"",
+  [anon_sym_BQUOTE] = "`",
+  [sym__identifier] = "_identifier",
+  [sym_source_file] = "source_file",
+  [sym__definition] = "_definition",
+  [sym__end] = "_end",
+  [sym_connection] = "connection",
+  [sym_shape] = "shape",
+  [sym_label] = "label",
+  [sym_identifier] = "identifier",
+  [sym_arrow] = "arrow",
+  [sym_string] = "string",
+  [aux_sym_source_file_repeat1] = "source_file_repeat1",
+  [aux_sym_arrow_repeat1] = "arrow_repeat1",
+  [aux_sym_string_repeat1] = "string_repeat1",
+};
+
+static const TSSymbol ts_symbol_map[] = {
+  [ts_builtin_sym_end] = ts_builtin_sym_end,
+  [anon_sym_SEMI] = anon_sym_SEMI,
+  [anon_sym_LF] = anon_sym_LF,
+  [anon_sym_COLON] = anon_sym_COLON,
+  [aux_sym_label_token1] = aux_sym_label_token1,
+  [anon_sym_DASH_DASH] = anon_sym_DASH_DASH,
+  [anon_sym_DASH] = anon_sym_DASH,
+  [anon_sym_LT_DASH] = anon_sym_LT_DASH,
+  [anon_sym_GT] = anon_sym_GT,
+  [anon_sym_DASH_GT] = anon_sym_DASH_GT,
+  [anon_sym_SQUOTE] = anon_sym_SQUOTE,
+  [aux_sym_string_token1] = aux_sym_string_token1,
+  [anon_sym_DQUOTE] = anon_sym_DQUOTE,
+  [anon_sym_BQUOTE] = anon_sym_BQUOTE,
+  [sym__identifier] = sym__identifier,
+  [sym_source_file] = sym_source_file,
+  [sym__definition] = sym__definition,
+  [sym__end] = sym__end,
+  [sym_connection] = sym_connection,
+  [sym_shape] = sym_shape,
+  [sym_label] = sym_label,
+  [sym_identifier] = sym_identifier,
+  [sym_arrow] = sym_arrow,
+  [sym_string] = sym_string,
+  [aux_sym_source_file_repeat1] = aux_sym_source_file_repeat1,
+  [aux_sym_arrow_repeat1] = aux_sym_arrow_repeat1,
+  [aux_sym_string_repeat1] = aux_sym_string_repeat1,
+};
+
+static const TSSymbolMetadata ts_symbol_metadata[] = {
+  [ts_builtin_sym_end] = {
+    .visible = false,
+    .named = true,
+  },
+  [anon_sym_SEMI] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_LF] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_COLON] = {
+    .visible = true,
+    .named = false,
+  },
+  [aux_sym_label_token1] = {
+    .visible = false,
+    .named = false,
+  },
+  [anon_sym_DASH_DASH] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_DASH] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_LT_DASH] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_GT] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_DASH_GT] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_SQUOTE] = {
+    .visible = true,
+    .named = false,
+  },
+  [aux_sym_string_token1] = {
+    .visible = false,
+    .named = false,
+  },
+  [anon_sym_DQUOTE] = {
+    .visible = true,
+    .named = false,
+  },
+  [anon_sym_BQUOTE] = {
+    .visible = true,
+    .named = false,
+  },
+  [sym__identifier] = {
+    .visible = false,
+    .named = true,
+  },
+  [sym_source_file] = {
+    .visible = true,
+    .named = true,
+  },
+  [sym__definition] = {
+    .visible = false,
+    .named = true,
+  },
+  [sym__end] = {
+    .visible = false,
+    .named = true,
+  },
+  [sym_connection] = {
+    .visible = true,
+    .named = true,
+  },
+  [sym_shape] = {
+    .visible = true,
+    .named = true,
+  },
+  [sym_label] = {
+    .visible = true,
+    .named = true,
+  },
+  [sym_identifier] = {
+    .visible = true,
+    .named = true,
+  },
+  [sym_arrow] = {
+    .visible = true,
+    .named = true,
+  },
+  [sym_string] = {
+    .visible = true,
+    .named = true,
+  },
+  [aux_sym_source_file_repeat1] = {
+    .visible = false,
+    .named = false,
+  },
+  [aux_sym_arrow_repeat1] = {
+    .visible = false,
+    .named = false,
+  },
+  [aux_sym_string_repeat1] = {
+    .visible = false,
+    .named = false,
+  },
+};
+
+enum {
+  field_id = 1,
+  field_label = 2,
+  field_left = 3,
+  field_right = 4,
+};
+
+static const char * const ts_field_names[] = {
+  [0] = NULL,
+  [field_id] = "id",
+  [field_label] = "label",
+  [field_left] = "left",
+  [field_right] = "right",
+};
+
+static const TSFieldMapSlice ts_field_map_slices[PRODUCTION_ID_COUNT] = {
+  [1] = {.index = 0, .length = 1},
+  [2] = {.index = 1, .length = 2},
+  [3] = {.index = 3, .length = 2},
+};
+
+static const TSFieldMapEntry ts_field_map_entries[] = {
+  [0] =
+    {field_id, 0},
+  [1] =
+    {field_id, 0},
+    {field_label, 2},
+  [3] =
+    {field_left, 0},
+    {field_right, 2},
+};
+
+static const TSSymbol ts_alias_sequences[PRODUCTION_ID_COUNT][MAX_ALIAS_SEQUENCE_LENGTH] = {
+  [0] = {0},
+};
+
+static const uint16_t ts_non_terminal_alias_map[] = {
+  0,
+};
+
+static const TSStateId ts_primary_state_ids[STATE_COUNT] = {
+  [0] = 0,
+  [1] = 1,
+  [2] = 2,
+  [3] = 3,
+  [4] = 4,
+  [5] = 5,
+  [6] = 6,
+  [7] = 7,
+  [8] = 8,
+  [9] = 9,
+  [10] = 10,
+  [11] = 7,
+  [12] = 12,
+  [13] = 13,
+  [14] = 12,
+  [15] = 15,
+  [16] = 16,
+  [17] = 17,
+  [18] = 18,
+  [19] = 19,
+  [20] = 20,
+  [21] = 12,
+  [22] = 22,
+  [23] = 23,
+  [24] = 24,
+  [25] = 25,
+  [26] = 26,
+  [27] = 27,
+  [28] = 28,
+  [29] = 29,
+  [30] = 30,
+  [31] = 31,
+  [32] = 32,
+  [33] = 33,
+  [34] = 34,
+  [35] = 35,
+};
+
+static bool ts_lex(TSLexer *lexer, TSStateId state) {
+  START_LEXER();
+  eof = lexer->eof(lexer);
+  switch (state) {
+    case 0:
+      if (eof) ADVANCE(9);
+      if (lookahead == '"') ADVANCE(28);
+      if (lookahead == '\'') ADVANCE(22);
+      if (lookahead == '-') ADVANCE(17);
+      if (lookahead == ':') ADVANCE(12);
+      if (lookahead == ';') ADVANCE(10);
+      if (lookahead == '<') ADVANCE(6);
+      if (lookahead == '>') ADVANCE(20);
+      if (lookahead == '`') ADVANCE(31);
+      if (lookahead == '\t' ||
+          lookahead == '\n' ||
+          lookahead == '\r' ||
+          lookahead == ' ') SKIP(0)
+      END_STATE();
+    case 1:
+      if (lookahead == '\n') ADVANCE(11);
+      if (lookahead == '-') ADVANCE(17);
+      if (lookahead == ':') ADVANCE(12);
+      if (lookahead == ';') ADVANCE(10);
+      if (lookahead == '<') ADVANCE(6);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') SKIP(1)
+      END_STATE();
+    case 2:
+      if (lookahead == '\n') SKIP(2)
+      if (lookahead == '"') ADVANCE(30);
+      if (lookahead == '\'') ADVANCE(23);
+      if (lookahead == '`') ADVANCE(33);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(13);
+      if (lookahead != 0 &&
+          lookahead != '{') ADVANCE(14);
+      END_STATE();
+    case 3:
+      if (lookahead == '\n') SKIP(3)
+      if (lookahead == '`') ADVANCE(32);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(25);
+      if (lookahead != 0 &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 4:
+      if (lookahead == '\n') SKIP(4)
+      if (lookahead == '"') ADVANCE(29);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(24);
+      if (lookahead != 0 &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 5:
+      if (lookahead == '\n') SKIP(5)
+      if (lookahead == '\'') ADVANCE(22);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(26);
+      if (lookahead != 0) ADVANCE(27);
+      END_STATE();
+    case 6:
+      if (lookahead == '-') ADVANCE(19);
+      END_STATE();
+    case 7:
+      if (lookahead == '-') ADVANCE(16);
+      if (lookahead == '>') ADVANCE(20);
+      if (lookahead == '\t' ||
+          lookahead == '\n' ||
+          lookahead == '\r' ||
+          lookahead == ' ') SKIP(7)
+      END_STATE();
+    case 8:
+      if (lookahead == '-') ADVANCE(18);
+      if (lookahead == '\t' ||
+          lookahead == '\n' ||
+          lookahead == '\r' ||
+          lookahead == ' ') SKIP(8)
+      END_STATE();
+    case 9:
+      ACCEPT_TOKEN(ts_builtin_sym_end);
+      END_STATE();
+    case 10:
+      ACCEPT_TOKEN(anon_sym_SEMI);
+      END_STATE();
+    case 11:
+      ACCEPT_TOKEN(anon_sym_LF);
+      if (lookahead == '\n') ADVANCE(11);
+      END_STATE();
+    case 12:
+      ACCEPT_TOKEN(anon_sym_COLON);
+      END_STATE();
+    case 13:
+      ACCEPT_TOKEN(aux_sym_label_token1);
+      if (lookahead == '"') ADVANCE(30);
+      if (lookahead == '\'') ADVANCE(23);
+      if (lookahead == '`') ADVANCE(33);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(13);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '{') ADVANCE(14);
+      END_STATE();
+    case 14:
+      ACCEPT_TOKEN(aux_sym_label_token1);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '{') ADVANCE(14);
+      END_STATE();
+    case 15:
+      ACCEPT_TOKEN(anon_sym_DASH_DASH);
+      END_STATE();
+    case 16:
+      ACCEPT_TOKEN(anon_sym_DASH);
+      END_STATE();
+    case 17:
+      ACCEPT_TOKEN(anon_sym_DASH);
+      if (lookahead == '-') ADVANCE(15);
+      if (lookahead == '>') ADVANCE(21);
+      END_STATE();
+    case 18:
+      ACCEPT_TOKEN(anon_sym_DASH);
+      if (lookahead == '>') ADVANCE(21);
+      END_STATE();
+    case 19:
+      ACCEPT_TOKEN(anon_sym_LT_DASH);
+      END_STATE();
+    case 20:
+      ACCEPT_TOKEN(anon_sym_GT);
+      END_STATE();
+    case 21:
+      ACCEPT_TOKEN(anon_sym_DASH_GT);
+      END_STATE();
+    case 22:
+      ACCEPT_TOKEN(anon_sym_SQUOTE);
+      END_STATE();
+    case 23:
+      ACCEPT_TOKEN(anon_sym_SQUOTE);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '{') ADVANCE(14);
+      END_STATE();
+    case 24:
+      ACCEPT_TOKEN(aux_sym_string_token1);
+      if (lookahead == '"') ADVANCE(29);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(24);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 25:
+      ACCEPT_TOKEN(aux_sym_string_token1);
+      if (lookahead == '`') ADVANCE(32);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(25);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 26:
+      ACCEPT_TOKEN(aux_sym_string_token1);
+      if (lookahead == '\t' ||
+          lookahead == '\r' ||
+          lookahead == ' ') ADVANCE(26);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 27:
+      ACCEPT_TOKEN(aux_sym_string_token1);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 28:
+      ACCEPT_TOKEN(anon_sym_DQUOTE);
+      END_STATE();
+    case 29:
+      ACCEPT_TOKEN(anon_sym_DQUOTE);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 30:
+      ACCEPT_TOKEN(anon_sym_DQUOTE);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '{') ADVANCE(14);
+      END_STATE();
+    case 31:
+      ACCEPT_TOKEN(anon_sym_BQUOTE);
+      END_STATE();
+    case 32:
+      ACCEPT_TOKEN(anon_sym_BQUOTE);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '\'') ADVANCE(27);
+      END_STATE();
+    case 33:
+      ACCEPT_TOKEN(anon_sym_BQUOTE);
+      if (lookahead != 0 &&
+          lookahead != '\n' &&
+          lookahead != '{') ADVANCE(14);
+      END_STATE();
+    default:
+      return false;
+  }
+}
+
+static const TSLexMode ts_lex_modes[STATE_COUNT] = {
+  [0] = {.lex_state = 0, .external_lex_state = 1},
+  [1] = {.lex_state = 0, .external_lex_state = 1},
+  [2] = {.lex_state = 1},
+  [3] = {.lex_state = 0, .external_lex_state = 1},
+  [4] = {.lex_state = 1},
+  [5] = {.lex_state = 0, .external_lex_state = 1},
+  [6] = {.lex_state = 2},
+  [7] = {.lex_state = 7, .external_lex_state = 1},
+  [8] = {.lex_state = 7, .external_lex_state = 1},
+  [9] = {.lex_state = 7, .external_lex_state = 1},
+  [10] = {.lex_state = 3},
+  [11] = {.lex_state = 8},
+  [12] = {.lex_state = 3},
+  [13] = {.lex_state = 8},
+  [14] = {.lex_state = 4},
+  [15] = {.lex_state = 5},
+  [16] = {.lex_state = 4},
+  [17] = {.lex_state = 3},
+  [18] = {.lex_state = 1},
+  [19] = {.lex_state = 7, .external_lex_state = 1},
+  [20] = {.lex_state = 7, .external_lex_state = 1},
+  [21] = {.lex_state = 5},
+  [22] = {.lex_state = 1},
+  [23] = {.lex_state = 4},
+  [24] = {.lex_state = 5},
+  [25] = {.lex_state = 1},
+  [26] = {.lex_state = 0, .external_lex_state = 1},
+  [27] = {.lex_state = 0, .external_lex_state = 1},
+  [28] = {.lex_state = 0, .external_lex_state = 1},
+  [29] = {.lex_state = 1},
+  [30] = {.lex_state = 1},
+  [31] = {.lex_state = 0, .external_lex_state = 1},
+  [32] = {.lex_state = 0, .external_lex_state = 1},
+  [33] = {.lex_state = 0, .external_lex_state = 1},
+  [34] = {.lex_state = 0},
+  [35] = {.lex_state = 0, .external_lex_state = 1},
+};
+
+enum {
+  ts_external_token__identifier = 0,
+};
+
+static const TSSymbol ts_external_scanner_symbol_map[EXTERNAL_TOKEN_COUNT] = {
+  [ts_external_token__identifier] = sym__identifier,
+};
+
+static const bool ts_external_scanner_states[2][EXTERNAL_TOKEN_COUNT] = {
+  [1] = {
+    [ts_external_token__identifier] = true,
+  },
+};
+
+static const uint16_t ts_parse_table[LARGE_STATE_COUNT][SYMBOL_COUNT] = {
+  [0] = {
+    [ts_builtin_sym_end] = ACTIONS(1),
+    [anon_sym_SEMI] = ACTIONS(1),
+    [anon_sym_COLON] = ACTIONS(1),
+    [anon_sym_DASH_DASH] = ACTIONS(1),
+    [anon_sym_DASH] = ACTIONS(1),
+    [anon_sym_LT_DASH] = ACTIONS(1),
+    [anon_sym_GT] = ACTIONS(1),
+    [anon_sym_DASH_GT] = ACTIONS(1),
+    [anon_sym_SQUOTE] = ACTIONS(1),
+    [anon_sym_DQUOTE] = ACTIONS(1),
+    [anon_sym_BQUOTE] = ACTIONS(1),
+    [sym__identifier] = ACTIONS(1),
+  },
+  [1] = {
+    [sym_source_file] = STATE(34),
+    [sym__definition] = STATE(5),
+    [sym_connection] = STATE(5),
+    [sym_shape] = STATE(5),
+    [sym_identifier] = STATE(2),
+    [aux_sym_source_file_repeat1] = STATE(5),
+    [ts_builtin_sym_end] = ACTIONS(3),
+    [sym__identifier] = ACTIONS(5),
+  },
+};
+
+static const uint16_t ts_small_parse_table[] = {
+  [0] = 10,
+    ACTIONS(7), 1,
+      anon_sym_SEMI,
+    ACTIONS(9), 1,
+      anon_sym_LF,
+    ACTIONS(11), 1,
+      anon_sym_COLON,
+    ACTIONS(13), 1,
+      anon_sym_DASH_DASH,
+    ACTIONS(15), 1,
+      anon_sym_DASH,
+    ACTIONS(17), 1,
+      anon_sym_LT_DASH,
+    ACTIONS(19), 1,
+      anon_sym_DASH_GT,
+    STATE(13), 1,
+      aux_sym_arrow_repeat1,
+    STATE(26), 1,
+      sym__end,
+    STATE(31), 1,
+      sym_arrow,
+  [31] = 4,
+    ACTIONS(21), 1,
+      ts_builtin_sym_end,
+    ACTIONS(23), 1,
+      sym__identifier,
+    STATE(2), 1,
+      sym_identifier,
+    STATE(3), 4,
+      sym__definition,
+      sym_connection,
+      sym_shape,
+      aux_sym_source_file_repeat1,
+  [47] = 2,
+    ACTIONS(28), 1,
+      anon_sym_LF,
+    ACTIONS(26), 6,
+      anon_sym_SEMI,
+      anon_sym_COLON,
+      anon_sym_DASH_DASH,
+      anon_sym_DASH,
+      anon_sym_LT_DASH,
+      anon_sym_DASH_GT,
+  [59] = 4,
+    ACTIONS(5), 1,
+      sym__identifier,
+    ACTIONS(30), 1,
+      ts_builtin_sym_end,
+    STATE(2), 1,
+      sym_identifier,
+    STATE(3), 4,
+      sym__definition,
+      sym_connection,
+      sym_shape,
+      aux_sym_source_file_repeat1,
+  [75] = 6,
+    ACTIONS(32), 1,
+      aux_sym_label_token1,
+    ACTIONS(34), 1,
+      anon_sym_SQUOTE,
+    ACTIONS(36), 1,
+      anon_sym_DQUOTE,
+    ACTIONS(38), 1,
+      anon_sym_BQUOTE,
+    STATE(18), 1,
+      sym_label,
+    STATE(30), 1,
+      sym_string,
+  [94] = 3,
+    ACTIONS(40), 1,
+      anon_sym_DASH,
+    STATE(7), 1,
+      aux_sym_arrow_repeat1,
+    ACTIONS(43), 2,
+      sym__identifier,
+      anon_sym_GT,
+  [105] = 4,
+    ACTIONS(45), 1,
+      anon_sym_DASH,
+    ACTIONS(47), 1,
+      anon_sym_GT,
+    ACTIONS(49), 1,
+      sym__identifier,
+    STATE(9), 1,
+      aux_sym_arrow_repeat1,
+  [118] = 4,
+    ACTIONS(51), 1,
+      anon_sym_DASH,
+    ACTIONS(53), 1,
+      anon_sym_GT,
+    ACTIONS(55), 1,
+      sym__identifier,
+    STATE(7), 1,
+      aux_sym_arrow_repeat1,
+  [131] = 3,
+    ACTIONS(57), 1,
+      aux_sym_string_token1,
+    ACTIONS(59), 1,
+      anon_sym_BQUOTE,
+    STATE(12), 1,
+      aux_sym_string_repeat1,
+  [141] = 3,
+    ACTIONS(43), 1,
+      anon_sym_DASH_GT,
+    ACTIONS(61), 1,
+      anon_sym_DASH,
+    STATE(11), 1,
+      aux_sym_arrow_repeat1,
+  [151] = 3,
+    ACTIONS(64), 1,
+      aux_sym_string_token1,
+    ACTIONS(67), 1,
+      anon_sym_BQUOTE,
+    STATE(12), 1,
+      aux_sym_string_repeat1,
+  [161] = 3,
+    ACTIONS(47), 1,
+      anon_sym_DASH_GT,
+    ACTIONS(69), 1,
+      anon_sym_DASH,
+    STATE(11), 1,
+      aux_sym_arrow_repeat1,
+  [171] = 3,
+    ACTIONS(67), 1,
+      anon_sym_DQUOTE,
+    ACTIONS(71), 1,
+      aux_sym_string_token1,
+    STATE(14), 1,
+      aux_sym_string_repeat1,
+  [181] = 3,
+    ACTIONS(74), 1,
+      anon_sym_SQUOTE,
+    ACTIONS(76), 1,
+      aux_sym_string_token1,
+    STATE(24), 1,
+      aux_sym_string_repeat1,
+  [191] = 3,
+    ACTIONS(74), 1,
+      anon_sym_DQUOTE,
+    ACTIONS(78), 1,
+      aux_sym_string_token1,
+    STATE(23), 1,
+      aux_sym_string_repeat1,
+  [201] = 3,
+    ACTIONS(74), 1,
+      anon_sym_BQUOTE,
+    ACTIONS(80), 1,
+      aux_sym_string_token1,
+    STATE(10), 1,
+      aux_sym_string_repeat1,
+  [211] = 3,
+    ACTIONS(82), 1,
+      anon_sym_SEMI,
+    ACTIONS(84), 1,
+      anon_sym_LF,
+    STATE(27), 1,
+      sym__end,
+  [221] = 3,
+    ACTIONS(51), 1,
+      anon_sym_DASH,
+    ACTIONS(55), 1,
+      sym__identifier,
+    STATE(7), 1,
+      aux_sym_arrow_repeat1,
+  [231] = 3,
+    ACTIONS(49), 1,
+      sym__identifier,
+    ACTIONS(86), 1,
+      anon_sym_DASH,
+    STATE(19), 1,
+      aux_sym_arrow_repeat1,
+  [241] = 3,
+    ACTIONS(67), 1,
+      anon_sym_SQUOTE,
+    ACTIONS(88), 1,
+      aux_sym_string_token1,
+    STATE(21), 1,
+      aux_sym_string_repeat1,
+  [251] = 3,
+    ACTIONS(91), 1,
+      anon_sym_SEMI,
+    ACTIONS(93), 1,
+      anon_sym_LF,
+    STATE(28), 1,
+      sym__end,
+  [261] = 3,
+    ACTIONS(59), 1,
+      anon_sym_DQUOTE,
+    ACTIONS(95), 1,
+      aux_sym_string_token1,
+    STATE(14), 1,
+      aux_sym_string_repeat1,
+  [271] = 3,
+    ACTIONS(59), 1,
+      anon_sym_SQUOTE,
+    ACTIONS(97), 1,
+      aux_sym_string_token1,
+    STATE(21), 1,
+      aux_sym_string_repeat1,
+  [281] = 2,
+    ACTIONS(99), 1,
+      anon_sym_SEMI,
+    ACTIONS(101), 1,
+      anon_sym_LF,
+  [288] = 1,
+    ACTIONS(103), 2,
+      sym__identifier,
+      ts_builtin_sym_end,
+  [293] = 1,
+    ACTIONS(105), 2,
+      sym__identifier,
+      ts_builtin_sym_end,
+  [298] = 1,
+    ACTIONS(107), 2,
+      sym__identifier,
+      ts_builtin_sym_end,
+  [303] = 2,
+    ACTIONS(109), 1,
+      anon_sym_SEMI,
+    ACTIONS(111), 1,
+      anon_sym_LF,
+  [310] = 2,
+    ACTIONS(113), 1,
+      anon_sym_SEMI,
+    ACTIONS(115), 1,
+      anon_sym_LF,
+  [317] = 2,
+    ACTIONS(5), 1,
+      sym__identifier,
+    STATE(22), 1,
+      sym_identifier,
+  [324] = 1,
+    ACTIONS(49), 1,
+      sym__identifier,
+  [328] = 1,
+    ACTIONS(117), 1,
+      sym__identifier,
+  [332] = 1,
+    ACTIONS(119), 1,
+      ts_builtin_sym_end,
+  [336] = 1,
+    ACTIONS(55), 1,
+      sym__identifier,
+};
+
+static const uint32_t ts_small_parse_table_map[] = {
+  [SMALL_STATE(2)] = 0,
+  [SMALL_STATE(3)] = 31,
+  [SMALL_STATE(4)] = 47,
+  [SMALL_STATE(5)] = 59,
+  [SMALL_STATE(6)] = 75,
+  [SMALL_STATE(7)] = 94,
+  [SMALL_STATE(8)] = 105,
+  [SMALL_STATE(9)] = 118,
+  [SMALL_STATE(10)] = 131,
+  [SMALL_STATE(11)] = 141,
+  [SMALL_STATE(12)] = 151,
+  [SMALL_STATE(13)] = 161,
+  [SMALL_STATE(14)] = 171,
+  [SMALL_STATE(15)] = 181,
+  [SMALL_STATE(16)] = 191,
+  [SMALL_STATE(17)] = 201,
+  [SMALL_STATE(18)] = 211,
+  [SMALL_STATE(19)] = 221,
+  [SMALL_STATE(20)] = 231,
+  [SMALL_STATE(21)] = 241,
+  [SMALL_STATE(22)] = 251,
+  [SMALL_STATE(23)] = 261,
+  [SMALL_STATE(24)] = 271,
+  [SMALL_STATE(25)] = 281,
+  [SMALL_STATE(26)] = 288,
+  [SMALL_STATE(27)] = 293,
+  [SMALL_STATE(28)] = 298,
+  [SMALL_STATE(29)] = 303,
+  [SMALL_STATE(30)] = 310,
+  [SMALL_STATE(31)] = 317,
+  [SMALL_STATE(32)] = 324,
+  [SMALL_STATE(33)] = 328,
+  [SMALL_STATE(34)] = 332,
+  [SMALL_STATE(35)] = 336,
+};
+
+static const TSParseActionEntry ts_parse_actions[] = {
+  [0] = {.entry = {.count = 0, .reusable = false}},
+  [1] = {.entry = {.count = 1, .reusable = false}}, RECOVER(),
+  [3] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_source_file, 0),
+  [5] = {.entry = {.count = 1, .reusable = true}}, SHIFT(4),
+  [7] = {.entry = {.count = 1, .reusable = false}}, SHIFT(26),
+  [9] = {.entry = {.count = 1, .reusable = true}}, SHIFT(26),
+  [11] = {.entry = {.count = 1, .reusable = false}}, SHIFT(6),
+  [13] = {.entry = {.count = 1, .reusable = false}}, SHIFT(20),
+  [15] = {.entry = {.count = 1, .reusable = false}}, SHIFT(13),
+  [17] = {.entry = {.count = 1, .reusable = false}}, SHIFT(8),
+  [19] = {.entry = {.count = 1, .reusable = false}}, SHIFT(32),
+  [21] = {.entry = {.count = 1, .reusable = true}}, REDUCE(aux_sym_source_file_repeat1, 2),
+  [23] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_source_file_repeat1, 2), SHIFT_REPEAT(4),
+  [26] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_identifier, 1),
+  [28] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_identifier, 1),
+  [30] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_source_file, 1),
+  [32] = {.entry = {.count = 1, .reusable = false}}, SHIFT(30),
+  [34] = {.entry = {.count = 1, .reusable = false}}, SHIFT(15),
+  [36] = {.entry = {.count = 1, .reusable = false}}, SHIFT(16),
+  [38] = {.entry = {.count = 1, .reusable = false}}, SHIFT(17),
+  [40] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_arrow_repeat1, 2), SHIFT_REPEAT(7),
+  [43] = {.entry = {.count = 1, .reusable = true}}, REDUCE(aux_sym_arrow_repeat1, 2),
+  [45] = {.entry = {.count = 1, .reusable = true}}, SHIFT(9),
+  [47] = {.entry = {.count = 1, .reusable = true}}, SHIFT(35),
+  [49] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_arrow, 1),
+  [51] = {.entry = {.count = 1, .reusable = true}}, SHIFT(7),
+  [53] = {.entry = {.count = 1, .reusable = true}}, SHIFT(33),
+  [55] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_arrow, 2),
+  [57] = {.entry = {.count = 1, .reusable = false}}, SHIFT(12),
+  [59] = {.entry = {.count = 1, .reusable = false}}, SHIFT(29),
+  [61] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_arrow_repeat1, 2), SHIFT_REPEAT(11),
+  [64] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_string_repeat1, 2), SHIFT_REPEAT(12),
+  [67] = {.entry = {.count = 1, .reusable = false}}, REDUCE(aux_sym_string_repeat1, 2),
+  [69] = {.entry = {.count = 1, .reusable = false}}, SHIFT(11),
+  [71] = {.entry = {.count = 2, .reusable = false}}, REDUCE(aux_sym_string_repeat1, 2), SHIFT_REPEAT(14),
+  [74] = {.entry = {.count = 1, .reusable = false}}, SHIFT(25),
+  [76] = {.entry = {.count = 1, .reusable = true}}, SHIFT(24),
+  [78] = {.entry = {.count = 1, .reusable = false}}, SHIFT(23),
+  [80] = {.entry = {.count = 1, .reusable = false}}, SHIFT(10),
+  [82] = {.entry = {.count = 1, .reusable = false}}, SHIFT(27),
+  [84] = {.entry = {.count = 1, .reusable = true}}, SHIFT(27),
+  [86] = {.entry = {.count = 1, .reusable = true}}, SHIFT(19),
+  [88] = {.entry = {.count = 2, .reusable = true}}, REDUCE(aux_sym_string_repeat1, 2), SHIFT_REPEAT(21),
+  [91] = {.entry = {.count = 1, .reusable = false}}, SHIFT(28),
+  [93] = {.entry = {.count = 1, .reusable = true}}, SHIFT(28),
+  [95] = {.entry = {.count = 1, .reusable = false}}, SHIFT(14),
+  [97] = {.entry = {.count = 1, .reusable = true}}, SHIFT(21),
+  [99] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_string, 2),
+  [101] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_string, 2),
+  [103] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_shape, 2, .production_id = 1),
+  [105] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_shape, 4, .production_id = 2),
+  [107] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_connection, 4, .production_id = 3),
+  [109] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_string, 3),
+  [111] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_string, 3),
+  [113] = {.entry = {.count = 1, .reusable = false}}, REDUCE(sym_label, 1),
+  [115] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_label, 1),
+  [117] = {.entry = {.count = 1, .reusable = true}}, REDUCE(sym_arrow, 3),
+  [119] = {.entry = {.count = 1, .reusable = true}},  ACCEPT_INPUT(),
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void *tree_sitter_d2_external_scanner_create(void);
+void tree_sitter_d2_external_scanner_destroy(void *);
+bool tree_sitter_d2_external_scanner_scan(void *, TSLexer *, const bool *);
+unsigned tree_sitter_d2_external_scanner_serialize(void *, char *);
+void tree_sitter_d2_external_scanner_deserialize(void *, const char *, unsigned);
+
+#ifdef _WIN32
+#define extern __declspec(dllexport)
+#endif
+
+extern const TSLanguage *tree_sitter_d2(void) {
+  static const TSLanguage language = {
+    .version = LANGUAGE_VERSION,
+    .symbol_count = SYMBOL_COUNT,
+    .alias_count = ALIAS_COUNT,
+    .token_count = TOKEN_COUNT,
+    .external_token_count = EXTERNAL_TOKEN_COUNT,
+    .state_count = STATE_COUNT,
+    .large_state_count = LARGE_STATE_COUNT,
+    .production_id_count = PRODUCTION_ID_COUNT,
+    .field_count = FIELD_COUNT,
+    .max_alias_sequence_length = MAX_ALIAS_SEQUENCE_LENGTH,
+    .parse_table = &ts_parse_table[0][0],
+    .small_parse_table = ts_small_parse_table,
+    .small_parse_table_map = ts_small_parse_table_map,
+    .parse_actions = ts_parse_actions,
+    .symbol_names = ts_symbol_names,
+    .field_names = ts_field_names,
+    .field_map_slices = ts_field_map_slices,
+    .field_map_entries = ts_field_map_entries,
+    .symbol_metadata = ts_symbol_metadata,
+    .public_symbol_map = ts_symbol_map,
+    .alias_map = ts_non_terminal_alias_map,
+    .alias_sequences = &ts_alias_sequences[0][0],
+    .lex_modes = ts_lex_modes,
+    .lex_fn = ts_lex,
+    .external_scanner = {
+      &ts_external_scanner_states[0][0],
+      ts_external_scanner_symbol_map,
+      tree_sitter_d2_external_scanner_create,
+      tree_sitter_d2_external_scanner_destroy,
+      tree_sitter_d2_external_scanner_scan,
+      tree_sitter_d2_external_scanner_serialize,
+      tree_sitter_d2_external_scanner_deserialize,
+    },
+    .primary_state_ids = ts_primary_state_ids,
+  };
+  return &language;
+}
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/scanner.c b/src/scanner.c
new file mode 100644
index 0000000..a00fe3c
--- /dev/null
+++ b/src/scanner.c
@@ -0,0 +1,58 @@
+#include <tree_sitter/parser.h>
+#include <wctype.h>
+
+enum TokenType {
+  IDENTIFIER
+};
+
+void *tree_sitter_d2_external_scanner_create() { return NULL; }
+void tree_sitter_d2_external_scanner_destroy(void *payload) { }
+unsigned tree_sitter_d2_external_scanner_serialize(void *p, char *buffer) { return 0; }
+void tree_sitter_d2_external_scanner_deserialize(void *p, const char *b, unsigned n) {}
+
+static void advance(TSLexer *lexer) { lexer->advance(lexer, false); }
+static void skip(TSLexer *lexer) { lexer->advance(lexer, true); }
+
+static bool scan_identifier(TSLexer *lexer) {
+  lexer->result_symbol = IDENTIFIER;
+  for (bool has_content = false;; has_content = true) {
+    lexer->mark_end(lexer);
+
+    while (iswspace(lexer->lookahead)) {
+      skip(lexer);
+    }
+
+    int32_t next = lexer->lookahead;
+
+    if (next == '{' || next == ':' || next == ';' || next == '\n' || next == 0) {
+      return has_content;
+    }
+
+    // arrows
+    if (next == '-') {
+      advance(lexer);
+      int32_t next_2 = lexer->lookahead;
+      if (next_2 == '-' || next_2 == '>') {
+        return has_content;
+      }
+    } else if (next == '<') {
+      return has_content;
+    }
+
+    advance(lexer);
+  }
+}
+
+bool tree_sitter_d2_external_scanner_scan(
+  void *payload,
+  TSLexer *lexer,
+  const bool *valid_symbols
+) {
+  if (valid_symbols[IDENTIFIER]) {
+    return scan_identifier(lexer);
+  }
+
+  return false;
+}
+
+
diff --git a/src/tree_sitter/parser.h b/src/tree_sitter/parser.h
new file mode 100644
index 0000000..2b14ac1
--- /dev/null
+++ b/src/tree_sitter/parser.h
@@ -0,0 +1,224 @@
+#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
+
+typedef uint16_t TSStateId;
+
+#ifndef TREE_SITTER_API_H_
+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;
+
+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;
+};
+
+/*
+ *  Lexer Macros
+ */
+
+#define START_LEXER()           \
+  bool result = false;          \
+  bool skip = false;            \
+  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 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_val, child_count_val, ...) \
+  {{                                             \
+    .reduce = {                                  \
+      .type = TSParseActionTypeReduce,           \
+      .symbol = symbol_val,                      \
+      .child_count = child_count_val,            \
+      __VA_ARGS__                                \
+    },                                           \
+  }}
+
+#define RECOVER()                    \
+  {{                                 \
+    .type = TSParseActionTypeRecover \
+  }}
+
+#define ACCEPT_INPUT()              \
+  {{                                \
+    .type = TSParseActionTypeAccept \
+  }}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TREE_SITTER_PARSER_H_
diff --git a/test/corpus/connection.txt b/test/corpus/connection.txt
new file mode 100644
index 0000000..27e7967
--- /dev/null
+++ b/test/corpus/connection.txt
@@ -0,0 +1,13 @@
+==================
+Simple name
+==================
+
+foo--bar
+
+---
+
+(source_file
+  (connection
+    left: (identifier)
+    (arrow)
+    right: (identifier)))
diff --git a/test/corpus/shape.txt b/test/corpus/shape.txt
new file mode 100644
index 0000000..f02845d
--- /dev/null
+++ b/test/corpus/shape.txt
@@ -0,0 +1,56 @@
+==================
+Single shape
+==================
+
+foo
+
+---
+
+(source_file (shape (identifier)))
+
+==================
+Inline shapes
+==================
+
+a;b;c
+
+---
+
+(source_file
+  (shape
+    (identifier))
+  (shape
+    (identifier))
+  (shape
+    (identifier)))
+
+==================
+Number identifier
+==================
+
+1;1a;b2
+
+---
+
+(source_file
+  (shape
+    (identifier))
+  (shape
+    (identifier))
+  (shape
+    (identifier)))
+
+
+==================
+Aliased shapes
+==================
+
+a: Hello World
+
+---
+
+(source_file
+  (shape
+    id: (identifier)
+    label: (label)))
+