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サンプル

@babel/plugin-syntax-bigint 7.8.3: parse BigInt literals using @babel/plugin-syntax-bigint

検証済みサンプル — npm @babel/plugin-syntax-bigint 7.8.3: parse BigInt literals using @babel/plugin-syntax-bigint. node 22 · linux alpine/x64 · docker で contract…

sha256:18f3b383a13b98efe7bd16bd07513429a069699a432902bb3c80746a5fcf30b8

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 linux 24 · ubuntu · glibc 2.39 x64 npm

検証実行環境

環境 コントラクト ステージ 実行日
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-26

ケース

HOW
ゴール
parse BigInt literals using @babel/plugin-syntax-bigint
パッケージ
シンボル
  • @babel/plugin-syntax-bigint
作成日
2026-08-26T14:20:48Z

コントラクト

  1. pluginSyntaxBigInt exports a declare plugin function registering syntax-bigint
  2. parses BigInt literals into BigIntLiteral AST nodes with value and raw representation
  3. parses BigInt literals in binary expressions and variable declarations without syntax errors
  4. parses BigInt literals in function return statements and array expressions

ファイル

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • test/contract.mjs

ソースアーティファクトをダウンロード (tar.gz)

ソース

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: parse BigInt literals using @babel/plugin-syntax-bigint
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-syntax-bigint@7.8.3
Demonstrate these symbols/APIs:
  - @babel/plugin-syntax-bigint

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:afc30327c5edbc4dad62bf33799f5c3fa046498b376086010e2aa68c93db218c","contract":["pluginSyntaxBigInt exports a declare plugin function registering syntax-bigint","parses BigInt literals into BigIntLiteral AST nodes with value and raw representation","parses BigInt literals in binary expressions and variable declarations without syntax errors","parses BigInt literals in function return statements and array expressions"],"goal":"parse BigInt literals using @babel/plugin-syntax-bigint","kind":"HOW","packages":["pkg:npm/%40babel/plugin-syntax-bigint@7.8.3"],"schemaVersion":1,"symbols":["@babel/plugin-syntax-bigint"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40babel/plugin-syntax-bigint@7.8.3"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-syntax-bigint@7.8.3","symbols":["@babel/plugin-syntax-bigint"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-syntax-bigint",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "@babel/core": "^7.26.0",
    "@babel/plugin-syntax-bigint": "7.8.3"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "parse BigInt literals using @babel/plugin-syntax-bigint",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-syntax-bigint@7.8.3"
  ],
  "symbols": [
    "@babel/plugin-syntax-bigint"
  ]
}
src/index.mjs
import { parseSync, transformSync } from "@babel/core";
import _pluginSyntaxBigInt from "@babel/plugin-syntax-bigint";

const pluginSyntaxBigInt = _pluginSyntaxBigInt?.default ?? _pluginSyntaxBigInt;

/**
 * Parses JavaScript code containing BigInt literals into an AST.
 * @param {string} code - Source JavaScript code.
 * @returns {object} - Babel AST program node.
 */
export function parseWithBigInt(code) {
  const result = parseSync(code, {
    plugins: [pluginSyntaxBigInt],
    configFile: false,
    babelrc: false,
  });
  return result?.program ?? null;
}

/**
 * Transforms JavaScript code using @babel/plugin-syntax-bigint.
 * @param {string} code - Source JavaScript code.
 * @param {object} [options] - Plugin configuration options.
 * @returns {string} - Transformed code string.
 */
export function transformWithBigInt(code, options = {}) {
  const result = transformSync(code, {
    plugins: [[pluginSyntaxBigInt, options]],
    configFile: false,
    babelrc: false,
  });
  return result?.code ?? "";
}

export { pluginSyntaxBigInt };
test/contract.mjs
import assert from "node:assert/strict";
import { parseWithBigInt, transformWithBigInt, pluginSyntaxBigInt } from "../src/index.mjs";

// Assertion 1: Plugin export verification
assert.equal(typeof pluginSyntaxBigInt, "function", "pluginSyntaxBigInt must be a function");

// Assertion 2: Parses BigInt literals into BigIntLiteral AST nodes
{
  const code = "const largeNumber = 9007199254740991n;";
  const program = parseWithBigInt(code);
  assert.ok(program, "AST program should be generated");
  assert.equal(program.body.length, 1, "Program should have 1 statement");

  const declaration = program.body[0];
  assert.equal(declaration.type, "VariableDeclaration", "Statement should be VariableDeclaration");
  const init = declaration.declarations[0].init;
  assert.equal(init.type, "BigIntLiteral", "Literal should be identified as BigIntLiteral");
  assert.equal(init.value, "9007199254740991", "BigInt literal value should match numeric string");
  assert.equal(init.extra?.raw, "9007199254740991n", "BigInt literal extra.raw should preserve source text");
}

// Assertion 3: Enables parsing of BigInt literals in expressions and returns valid code
{
  const code = "const result = 100n + 200n;";
  const transformed = transformWithBigInt(code);
  assert.ok(transformed.includes("100n + 200n"), "Transformed code should preserve BigInt expressions");

  const program = parseWithBigInt(code);
  const binaryExpr = program.body[0].declarations[0].init;
  assert.equal(binaryExpr.type, "BinaryExpression", "Expression should be BinaryExpression");
  assert.equal(binaryExpr.left.type, "BigIntLiteral", "Left operand should be BigIntLiteral");
  assert.equal(binaryExpr.right.type, "BigIntLiteral", "Right operand should be BigIntLiteral");
  assert.equal(binaryExpr.left.value, "100", "Left value should be 100");
  assert.equal(binaryExpr.right.value, "200", "Right value should be 200");
}

// Assertion 4: BigInt in function return and array literals
{
  const code = "function getBig() { return [1n, 2n, 3n]; }";
  const program = parseWithBigInt(code);
  const fnDecl = program.body[0];
  assert.equal(fnDecl.type, "FunctionDeclaration", "Statement should be FunctionDeclaration");
  const returnStmt = fnDecl.body.body[0];
  assert.equal(returnStmt.type, "ReturnStatement", "Function body should have ReturnStatement");
  const arrayExpr = returnStmt.argument;
  assert.equal(arrayExpr.type, "ArrayExpression", "Return argument should be ArrayExpression");
  assert.equal(arrayExpr.elements.length, 3, "Array should have 3 elements");
  assert.equal(arrayExpr.elements[0].type, "BigIntLiteral");
  assert.equal(arrayExpr.elements[0].value, "1");
}

console.log("All contract tests passed successfully.");

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