VS Code extension (highlighting, snippets, language client, Run/Build); LF line endings; LNK1181

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

editors/vscode/.gitignore

@@ -0,0 +1,2 @@
+node_modules/
+*.vsix

editors/vscode/.vscodeignore

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+.vscodeignore
+test/**
+node_modules/.package-lock.json
+node_modules/vscode-textmate/**
+node_modules/vscode-oniguruma/**
+node_modules/@vscode/**
+**/*.map
+.gitignore

editors/vscode/CHANGELOG.md

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+# Changelog
+
+## 2.3.0
+
+- First release: highlighting, snippets, language server, Run and Build.

editors/vscode/LICENSE

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editors/vscode/README.md

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+# Finch for Visual Studio Code
+
+Support for the [Finch](https://github.com/Nexoniarz/Finch) programming language (`.fch` files):
+
+- **Syntax highlighting**, bracket matching, comments with `Ctrl+/`
+- **Errors as you type**: the real compiler checks the file (`finch lsp`)
+- **Completion**: variables, functions, structs, keywords, built-ins, struct fields and array/str methods after `.`, names from imported C headers
+- **Hover** shows types and signatures; **Go to Definition** (F12); **Outline** of functions and structs; **parameter hints**
+- **Run** button (▶ in the editor title, or `Ctrl+F5`) and **Finch: Build This File**; compile errors land in the Problems panel
+- Snippets: `main`, `fn`, `fnr`, `struct`, `if`, `ife`, `for`, `foreach`, `while`, `input`, …
+
+## Requirements
+
+Finch 2.3 or newer. The extension runs `finch` from your PATH; if it lives somewhere else,
+set **Finch: Path** (`finch.path`) to the full path of `finch` / `finch.exe`.

editors/vscode/extension.js

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+// The Finch extension: starts `finch lsp` for editor features and adds Run / Build.
+const vscode = require('vscode');
+const { LanguageClient, TransportKind } = require('vscode-languageclient/node');
+
+let client = null;
+
+function finchPath() {
+    return vscode.workspace.getConfiguration('finch').get('path') || 'finch';
+}
+
+async function startServer(context) {
+    if (!vscode.workspace.getConfiguration('finch').get('languageServer')) return;
+    const command = finchPath();
+    client = new LanguageClient(
+        'finch',
+        'Finch',
+        { command, args: ['lsp'], transport: TransportKind.stdio },
+        { documentSelector: [{ scheme: 'file', language: 'finch' }] }
+    );
+    try {
+        await client.start();
+    } catch (err) {
+        client = null;
+        const pick = await vscode.window.showErrorMessage(
+            `Finch: couldn't start "${command} lsp". Is Finch installed? You can set its path in the settings.`,
+            'Open Settings'
+        );
+        if (pick) vscode.commands.executeCommand('workbench.action.openSettings', 'finch.path');
+    }
+}
+
+// Run or build the current file as a task: no shell quoting, and the problem matcher
+// turns compile errors into entries in the Problems panel.
+async function finchTask(verb) {
+    const editor = vscode.window.activeTextEditor;
+    if (!editor || editor.document.languageId !== 'finch') {
+        vscode.window.showWarningMessage('Finch: open a .fch file first.');
+        return;
+    }
+    if (editor.document.isDirty) await editor.document.save();
+    const file = editor.document.uri.fsPath;
+    const folder = vscode.workspace.getWorkspaceFolder(editor.document.uri);
+    const task = new vscode.Task(
+        { type: 'finch', verb, file },
+        folder || vscode.TaskScope.Workspace,
+        `${verb} ${require('path').basename(file)}`,
+        'finch',
+        new vscode.ProcessExecution(finchPath(), [verb, file], { cwd: require('path').dirname(file) }),
+        '$finch'
+    );
+    task.presentationOptions = { reveal: vscode.TaskRevealKind.Always, focus: verb === 'run', clear: true };
+    vscode.tasks.executeTask(task);
+}
+
+async function activate(context) {
+    context.subscriptions.push(
+        vscode.commands.registerCommand('finch.run', () => finchTask('run')),
+        vscode.commands.registerCommand('finch.build', () => finchTask('build')),
+        vscode.commands.registerCommand('finch.restartServer', async () => {
+            if (client) await client.stop();
+            await startServer(context);
+        }),
+        vscode.workspace.onDidChangeConfiguration(async (e) => {
+            if (e.affectsConfiguration('finch')) {
+                if (client) await client.stop();
+                await startServer(context);
+            }
+        })
+    );
+    await startServer(context);
+}
+
+async function deactivate() {
+    if (client) await client.stop();
+}
+
+module.exports = { activate, deactivate };

editors/vscode/images/file-dark.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="512" height="512">
+  <title>Finch</title>
+  <g transform="translate(0 -26)">
+    <!-- tail: two feathers -->
+    <path d="M178 316 L60 360 Q50 374 64 382 L192 348 Z" fill="#F5F3EF"/>
+    <path d="M182 334 L78 398 Q72 412 88 414 L200 360 Z" fill="#C9C4BC"/>
+    <!-- body -->
+    <path d="M150 330 C150 220 240 140 330 140 C400 140 440 190 440 245 C440 330 370 392 280 395 C220 398 168 372 150 330 Z" fill="#FF7A1A"/>
+    <!-- belly light -->
+    <path d="M236 390 C336 398 428 330 438 254 C432 300 404 330 372 350 C336 372 290 384 236 390 Z" fill="#FFA24D"/>
+    <!-- wing, swept back -->
+    <path d="M352 256 C306 232 228 256 160 340 C244 336 318 316 352 256 Z" fill="#1B1F2A"/>
+    <path d="M330 260 C292 252 246 270 206 306" fill="none" stroke="#FFFFFF" stroke-width="9" stroke-linecap="round"/>
+    <!-- beak -->
+    <path d="M434 212 L494 234 L434 254 Z" fill="#FFC145"/>
+    <!-- eye -->
+    <circle cx="382" cy="206" r="16" fill="#1B1F2A"/>
+    <circle cx="388" cy="200" r="5" fill="#FFFFFF"/>
+    <!-- legs and branch -->
+    <path d="M276 394 L270 420 M316 390 L318 420" stroke="#F5F3EF" stroke-width="10" stroke-linecap="round"/>
+    <path d="M120 424 L440 424" stroke="#F5F3EF" stroke-width="14" stroke-linecap="round"/>
+  </g>
+</svg>

editors/vscode/images/file-light.svg

@@ -0,0 +1,23 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" width="512" height="512">
+  <title>Finch</title>
+  <g transform="translate(0 -26)">
+    <!-- tail: two feathers -->
+    <path d="M178 316 L60 360 Q50 374 64 382 L192 348 Z" fill="#1B1F2A"/>
+    <path d="M182 334 L78 398 Q72 412 88 414 L200 360 Z" fill="#2E3445"/>
+    <!-- body -->
+    <path d="M150 330 C150 220 240 140 330 140 C400 140 440 190 440 245 C440 330 370 392 280 395 C220 398 168 372 150 330 Z" fill="#FF7A1A"/>
+    <!-- belly light -->
+    <path d="M236 390 C336 398 428 330 438 254 C432 300 404 330 372 350 C336 372 290 384 236 390 Z" fill="#FFA24D"/>
+    <!-- wing, swept back -->
+    <path d="M352 256 C306 232 228 256 160 340 C244 336 318 316 352 256 Z" fill="#1B1F2A"/>
+    <path d="M330 260 C292 252 246 270 206 306" fill="none" stroke="#FFFFFF" stroke-width="9" stroke-linecap="round"/>
+    <!-- beak -->
+    <path d="M434 212 L494 234 L434 254 Z" fill="#FFC145"/>
+    <!-- eye -->
+    <circle cx="382" cy="206" r="16" fill="#1B1F2A"/>
+    <circle cx="388" cy="200" r="5" fill="#FFFFFF"/>
+    <!-- legs and branch -->
+    <path d="M276 394 L270 420 M316 390 L318 420" stroke="#1B1F2A" stroke-width="10" stroke-linecap="round"/>
+    <path d="M120 424 L440 424" stroke="#1B1F2A" stroke-width="14" stroke-linecap="round"/>
+  </g>
+</svg>

editors/vscode/language-configuration.json

@@ -0,0 +1,19 @@
+{
+  "comments": { "lineComment": "//", "blockComment": ["/*", "*/"] },
+  "brackets": [["{", "}"], ["[", "]"], ["(", ")"]],
+  "autoClosingPairs": [
+    { "open": "{", "close": "}" },
+    { "open": "[", "close": "]" },
+    { "open": "(", "close": ")" },
+    { "open": "\"", "close": "\"", "notIn": ["string", "comment"] },
+    { "open": "'", "close": "'", "notIn": ["string", "comment"] },
+    { "open": "/*", "close": " */", "notIn": ["string"] }
+  ],
+  "surroundingPairs": [["{", "}"], ["[", "]"], ["(", ")"], ["\"", "\""], ["'", "'"]],
+  "indentationRules": {
+    "increaseIndentPattern": "^.*\\{[^}\"']*$|^.*\\([^)\"']*$|^.*\\[[^\\]\"']*$",
+    "decreaseIndentPattern": "^\\s*[}\\])]"
+  },
+  "wordPattern": "[A-Za-z_][A-Za-z0-9_]*|-?\\d[\\d_]*(\\.\\d+)?",
+  "folding": { "markers": { "start": "^\\s*//\\s*#?region\\b", "end": "^\\s*//\\s*#?endregion\\b" } }
+}

editors/vscode/package.json

@@ -0,0 +1,154 @@
+{
+  "name": "finch-lang",
+  "displayName": "Finch",
+  "description": "The Finch programming language: highlighting, errors as you type, completion, hover, go to definition, and a Run button.",
+  "version": "2.3.0",
+  "publisher": "nexoniarz",
+  "license": "Apache-2.0",
+  "icon": "images/icon.png",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/Nexoniarz/Finch"
+  },
+  "homepage": "https://github.com/Nexoniarz/Finch",
+  "bugs": {
+    "url": "https://github.com/Nexoniarz/Finch/issues"
+  },
+  "engines": {
+    "vscode": "^1.85.0"
+  },
+  "categories": [
+    "Programming Languages",
+    "Linters",
+    "Snippets"
+  ],
+  "keywords": [
+    "finch",
+    "llvm",
+    "compiler",
+    "language"
+  ],
+  "main": "./extension.js",
+  "activationEvents": [
+    "onLanguage:finch"
+  ],
+  "contributes": {
+    "languages": [
+      {
+        "id": "finch",
+        "aliases": [
+          "Finch",
+          "finch"
+        ],
+        "extensions": [
+          ".fch"
+        ],
+        "configuration": "./language-configuration.json",
+        "icon": {
+          "light": "./images/file-light.svg",
+          "dark": "./images/file-dark.svg"
+        }
+      }
+    ],
+    "grammars": [
+      {
+        "language": "finch",
+        "scopeName": "source.finch",
+        "path": "./syntaxes/finch.tmLanguage.json"
+      }
+    ],
+    "snippets": [
+      {
+        "language": "finch",
+        "path": "./snippets/finch.json"
+      }
+    ],
+    "configuration": {
+      "title": "Finch",
+      "properties": {
+        "finch.path": {
+          "type": "string",
+          "default": "finch",
+          "description": "The finch compiler: a command on your PATH, or the full path to finch / finch.exe."
+        },
+        "finch.languageServer": {
+          "type": "boolean",
+          "default": true,
+          "description": "Use `finch lsp` for errors as you type, completion, hover and go to definition."
+        }
+      }
+    },
+    "commands": [
+      {
+        "command": "finch.run",
+        "title": "Finch: Run This File",
+        "icon": "$(play)"
+      },
+      {
+        "command": "finch.build",
+        "title": "Finch: Build This File",
+        "icon": "$(tools)"
+      },
+      {
+        "command": "finch.restartServer",
+        "title": "Finch: Restart Language Server"
+      }
+    ],
+    "menus": {
+      "editor/title/run": [
+        {
+          "command": "finch.run",
+          "when": "resourceLangId == finch",
+          "group": "navigation"
+        }
+      ],
+      "commandPalette": [
+        {
+          "command": "finch.run",
+          "when": "editorLangId == finch"
+        },
+        {
+          "command": "finch.build",
+          "when": "editorLangId == finch"
+        }
+      ]
+    },
+    "keybindings": [
+      {
+        "command": "finch.run",
+        "key": "ctrl+f5",
+        "mac": "cmd+f5",
+        "when": "editorLangId == finch"
+      }
+    ],
+    "problemMatchers": [
+      {
+        "name": "finch",
+        "owner": "finch",
+        "fileLocation": [
+          "autoDetect",
+          "${workspaceFolder}"
+        ],
+        "pattern": {
+          "regexp": "^(.*?):(\\d+):(\\d+): error: (.*)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "message": 4
+        }
+      }
+    ]
+  },
+  "dependencies": {
+    "vscode-languageclient": "^9.0.1"
+  },
+  "scripts": {
+    "test": "node test/grammar.js",
+    "package": "vsce package"
+  },
+  "devDependencies": {
+    "vscode-textmate": "^9.2.0",
+    "vscode-oniguruma": "^2.0.1",
+    "@vscode/vsce": "^3.2.0"
+  }
+}

editors/vscode/snippets/finch.json

@@ -0,0 +1,16 @@
+{
+  "main": { "prefix": "main", "body": ["fn main() {", "\t$0", "}"], "description": "The program's start" },
+  "main with arguments": { "prefix": "mainargs", "body": ["fn main([]str args) {", "\t$0", "}"], "description": "main that gets the command-line arguments" },
+  "function": { "prefix": "fn", "body": ["fn ${1:name}(${2}) {", "\t$0", "}"], "description": "A function" },
+  "function with result": { "prefix": "fnr", "body": ["fn ${1:name}(${2}) -> ${3:int} {", "\t$0", "}"], "description": "A function that returns a value" },
+  "struct": { "prefix": "struct", "body": ["struct ${1:Name} {", "\t${2:int} ${3:field}", "}"], "description": "A struct" },
+  "if": { "prefix": "if", "body": ["if ${1:condition} {", "\t$0", "}"] },
+  "if else": { "prefix": "ife", "body": ["if ${1:condition} {", "\t$2", "} else {", "\t$0", "}"] },
+  "for range": { "prefix": "for", "body": ["for ${1:i} in ${2:0}..${3:n} {", "\t$0", "}"], "description": "Count from start to end-1" },
+  "for each": { "prefix": "foreach", "body": ["for ${1:item} in ${2:list} {", "\t$0", "}"], "description": "Every element of an array or str" },
+  "while": { "prefix": "while", "body": ["while ${1:condition} {", "\t$0", "}"] },
+  "print": { "prefix": "print", "body": ["print(${1})"] },
+  "input": { "prefix": "input", "body": ["${1:answer} := input(\"${2:Question? }\")"] },
+  "import C header": { "prefix": "importc", "body": ["import \"${1:stdio.h}\""] },
+  "defer": { "prefix": "defer", "body": ["defer ${1}"], "description": "Run this when the block ends" }
+}

editors/vscode/syntaxes/finch.tmLanguage.json

@@ -0,0 +1,241 @@
+{
+  "$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
+  "name": "Finch",
+  "scopeName": "source.finch",
+  "fileTypes": [
+    "fch"
+  ],
+  "patterns": [
+    {
+      "include": "#comments"
+    },
+    {
+      "include": "#imports"
+    },
+    {
+      "include": "#struct"
+    },
+    {
+      "include": "#function"
+    },
+    {
+      "include": "#statements"
+    }
+  ],
+  "repository": {
+    "comments": {
+      "patterns": [
+        {
+          "name": "comment.line.double-slash.finch",
+          "match": "//.*$"
+        },
+        {
+          "name": "comment.block.finch",
+          "begin": "/\\*",
+          "end": "\\*/"
+        }
+      ]
+    },
+    "imports": {
+      "patterns": [
+        {
+          "match": "^\\s*(import)\\s+(\"[^\"]*\")",
+          "captures": {
+            "1": {
+              "name": "keyword.control.import.finch"
+            },
+            "2": {
+              "name": "string.quoted.double.include.finch"
+            }
+          }
+        },
+        {
+          "match": "^\\s*(import)\\s+([A-Za-z_][A-Za-z0-9_]*)",
+          "captures": {
+            "1": {
+              "name": "keyword.control.import.finch"
+            },
+            "2": {
+              "name": "entity.name.namespace.finch"
+            }
+          }
+        },
+        {
+          "match": "^\\s*(link)\\s+(\"[^\"]*\")",
+          "captures": {
+            "1": {
+              "name": "keyword.control.import.finch"
+            },
+            "2": {
+              "name": "string.quoted.double.finch"
+            }
+          }
+        }
+      ]
+    },
+    "struct": {
+      "match": "\\b(struct)\\s+([A-Za-z_][A-Za-z0-9_]*)",
+      "captures": {
+        "1": {
+          "name": "storage.type.struct.finch"
+        },
+        "2": {
+          "name": "entity.name.type.struct.finch"
+        }
+      }
+    },
+    "function": {
+      "match": "\\b(fn)\\s+([A-Za-z_][A-Za-z0-9_]*)",
+      "captures": {
+        "1": {
+          "name": "storage.type.function.finch"
+        },
+        "2": {
+          "name": "entity.name.function.finch"
+        }
+      }
+    },
+    "statements": {
+      "patterns": [
+        {
+          "include": "#comments"
+        },
+        {
+          "include": "#strings"
+        },
+        {
+          "include": "#chars"
+        },
+        {
+          "include": "#numbers"
+        },
+        {
+          "name": "keyword.control.finch",
+          "match": "\\b(if|else|while|for|in|break|continue|return|defer)\\b"
+        },
+        {
+          "name": "storage.type.function.finch",
+          "match": "\\bfn\\b"
+        },
+        {
+          "name": "storage.type.struct.finch",
+          "match": "\\bstruct\\b"
+        },
+        {
+          "name": "constant.language.finch",
+          "match": "\\b(true|false|null)\\b"
+        },
+        {
+          "name": "storage.type.primitive.finch",
+          "match": "\\b(int|float|bool|char|str|ptr|i8|i16|i32|i64|u8|u16|u32|u64|f32|f64)\\b"
+        },
+        {
+          "match": "\\b(print|input|read_file|write_file|file_exists|delete_file|shell|exit|addr|new|free)\\s*(?=\\()",
+          "captures": {
+            "1": {
+              "name": "support.function.builtin.finch"
+            }
+          }
+        },
+        {
+          "match": "(?<=\\.)(len|ptr|value)\\b(?!\\s*\\()",
+          "captures": {
+            "1": {
+              "name": "variable.other.property.finch"
+            }
+          }
+        },
+        {
+          "match": "\\b([A-Z][A-Za-z0-9_]*)\\s*(?=\\()",
+          "captures": {
+            "1": {
+              "name": "entity.name.type.finch"
+            }
+          }
+        },
+        {
+          "match": "\\b([a-z_][A-Za-z0-9_]*)\\s*(?=\\()",
+          "captures": {
+            "1": {
+              "name": "entity.name.function.call.finch"
+            }
+          }
+        },
+        {
+          "name": "entity.name.type.finch",
+          "match": "\\b[A-Z][A-Za-z0-9_]*\\b"
+        },
+        {
+          "name": "keyword.operator.assignment.finch",
+          "match": ":=|\\+=|-=|\\*=|/=|%=|(?<![=!<>])=(?!=)"
+        },
+        {
+          "name": "keyword.operator.comparison.finch",
+          "match": "==|!=|<=|>=|<|>"
+        },
+        {
+          "name": "keyword.operator.logical.finch",
+          "match": "&&|\\|\\||!"
+        },
+        {
+          "name": "keyword.operator.arrow.finch",
+          "match": "->"
+        },
+        {
+          "name": "keyword.operator.range.finch",
+          "match": "\\.\\."
+        },
+        {
+          "name": "keyword.operator.arithmetic.finch",
+          "match": "<<|>>|[-+*/%&|^~]"
+        },
+        {
+          "name": "variable.other.finch",
+          "match": "\\b[a-z_][A-Za-z0-9_]*\\b"
+        }
+      ]
+    },
+    "strings": {
+      "name": "string.quoted.double.finch",
+      "begin": "\"",
+      "end": "\"|$",
+      "patterns": [
+        {
+          "name": "constant.character.escape.finch",
+          "match": "\\\\[ntr0\\\\\"']"
+        },
+        {
+          "name": "invalid.illegal.escape.finch",
+          "match": "\\\\."
+        }
+      ]
+    },
+    "chars": {
+      "name": "string.quoted.single.finch",
+      "begin": "'",
+      "end": "'|$",
+      "patterns": [
+        {
+          "name": "constant.character.escape.finch",
+          "match": "\\\\[ntr0\\\\\"']"
+        }
+      ]
+    },
+    "numbers": {
+      "patterns": [
+        {
+          "name": "constant.numeric.hex.finch",
+          "match": "\\b0[xX][0-9A-Fa-f_]+\\b"
+        },
+        {
+          "name": "constant.numeric.float.finch",
+          "match": "\\b\\d[\\d_]*\\.\\d[\\d_]*\\b"
+        },
+        {
+          "name": "constant.numeric.integer.finch",
+          "match": "\\b\\d[\\d_]*\\b"
+        }
+      ]
+    }
+  }
+}

editors/vscode/test/grammar.js

@@ -0,0 +1,51 @@
+// Tokenizes Finch code with the same engine VS Code uses and checks the scopes.
+const fs = require('fs'), path = require('path');
+const vsctm = require('vscode-textmate'), oniguruma = require('vscode-oniguruma');
+const grammarPath = path.join(__dirname, "..", "syntaxes", "finch.tmLanguage.json");
+const wasm = fs.readFileSync(require.resolve("vscode-oniguruma/release/onig.wasm")).buffer;
+const onigLib = oniguruma.loadWASM(wasm).then(() => ({
+  createOnigScanner: (s) => new oniguruma.OnigScanner(s),
+  createOnigString: (s) => new oniguruma.OnigString(s),
+}));
+const registry = new vsctm.Registry({ onigLib, loadGrammar: async () => vsctm.parseRawGrammar(fs.readFileSync(grammarPath, 'utf8'), grammarPath) });
+const code = [
+  'import "stdio.h"',
+  'import shapes',
+  'struct Point {',
+  '    int x = 0x1F',
+  '}',
+  'fn add(int a, float b) -> int {',
+  '    s := "hi\\n" + str(a)  // note',
+  '    for i in 0..10 { print(i, \'c\', 3.5, true, null) }',
+  '    p := Point(x: 1)',
+  '    return a + p.x',
+  '}',
+];
+const expect = [  // [line, token text, scope that must be present]
+  [0, 'import', 'keyword.control.import'], [0, '"stdio.h"', 'string.quoted.double'],
+  [1, 'shapes', 'entity.name.namespace'],
+  [2, 'struct', 'storage.type.struct'], [2, 'Point', 'entity.name.type.struct'],
+  [3, 'int', 'storage.type.primitive'], [3, '0x1F', 'constant.numeric.hex'],
+  [5, 'fn', 'storage.type.function'], [5, 'add', 'entity.name.function'], [5, 'float', 'storage.type.primitive'], [5, '->', 'keyword.operator.arrow'],
+  [6, ':=', 'keyword.operator.assignment'], [6, '\\n', 'constant.character.escape'], [6, '// note', 'comment.line'], [6, 'str', 'storage.type.primitive'],
+  [7, 'for', 'keyword.control'], [7, 'in', 'keyword.control'], [7, '..', 'keyword.operator.range'], [7, 'print', 'support.function.builtin'],
+  [7, 'c', 'string.quoted.single'], [7, '3.5', 'constant.numeric.float'], [7, 'true', 'constant.language'], [7, 'null', 'constant.language'],
+  [8, 'Point', 'entity.name.type'],
+  [9, 'return', 'keyword.control'],
+];
+registry.loadGrammar('source.finch').then((g) => {
+  let state = vsctm.INITIAL, toks = [];
+  code.forEach((line, i) => {
+    const r = g.tokenizeLine(line, state);
+    r.tokens.forEach((t) => toks.push([i, line.substring(t.startIndex, t.endIndex), t.scopes.join(' ')]));
+    state = r.ruleStack;
+  });
+  let bad = 0;
+  for (const [line, text, scope] of expect) {
+    const hit = toks.find((t) => t[0] === line && t[1].trim() === text);
+    const ok = hit && hit[2].includes(scope);
+    if (!ok) { bad++; console.log('FAIL', line, JSON.stringify(text), 'wanted', scope, 'got', hit ? hit[2] : '(no token)'); }
+  }
+  console.log(bad ? `grammar: ${bad} failed` : `grammar: all ${expect.length} ok`);
+  process.exit(bad ? 1 : 0);
+});