CodeSampleX

サンプル

@babel/core 7.26.0: template

検証済みサンプル — npm @babel/core 7.26.0: template. node 22 · linux debian/x64 · docker で contract を実行し、成功しました: template parses JavaScript code templates into AST…

sha256:47f09ef30d04d1bf98cdeb4074ef0aa1bde50196d2bab004aa7610c7cef03b21

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 debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-03

ケース

HOW
ゴール
verify template in pkg:npm/%40babel/core@7.26.0
パッケージ
シンボル
  • template
作成日
2026-09-03T11:42:46Z

コントラクト

  1. template parses JavaScript code templates into AST statements with placeholder substitution
  2. template.ast directly parses source strings and tagged template literals into AST nodes
  3. template.expression creates an AST builder specialized for expressions
  4. template.statements parses code into an array of Statement AST nodes

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: verify template in pkg:npm/%40babel/core@7.26.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.26.0
Demonstrate these symbols/APIs:
  - template

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:sha256:84fcc01e91577b927106695455e5a4ea17eed752cbe9cad17f84bf0a85161833","contract":["template parses JavaScript code templates into AST statements with placeholder substitution","template.ast directly parses source strings and tagged template literals into AST nodes","template.expression creates an AST builder specialized for expressions","template.statements parses code into an array of Statement AST nodes"],"goal":"verify template in pkg:npm/%40babel/core@7.26.0","kind":"HOW","packages":["pkg:npm/%40babel/core@7.26.0"],"schemaVersion":1,"symbols":["template"]},"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/core@7.26.0"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.26.0","symbols":["template"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-babel-core-template",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
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      "name": "sample-babel-core-template",
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      "license": "Apache-2.0",
      "dependencies": {
        "@jridgewell/gen-mapping": "^0.3.5",
        "@jridgewell/trace-mapping": "^0.3.24"
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package.json
{
  "name": "sample-babel-core-template",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@babel/core": "7.26.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify template in pkg:npm/%40babel/core@7.26.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.26.0"
  ],
  "symbols": [
    "template"
  ]
}
src/index.mjs
import { template, types } from '@babel/core';

/**
 * Builds a variable declaration AST node from a template string with identifier and value replacements.
 * @param {string} varName - Identifier name for the variable
 * @param {string|number} value - Value to assign
 * @returns {object} AST node representing the variable declaration
 */
export function buildVariableDeclaration(varName, value) {
  const build = template(`const NAME = VALUE;`);
  const valueNode = typeof value === 'number' ? types.numericLiteral(value) : types.stringLiteral(value);
  return build({
    NAME: types.identifier(varName),
    VALUE: valueNode,
  });
}

/**
 * Parses source code directly into an AST node using template.ast.
 * @param {string} code - JavaScript source code
 * @returns {object} AST node
 */
export function parseAst(code) {
  return template.ast(code);
}

/**
 * Creates an expression AST node from a template with placeholder substitution.
 * @param {string} leftId - Identifier on the left
 * @param {number} rightVal - Number on the right
 * @returns {object} BinaryExpression AST node
 */
export function buildBinaryExpression(leftId, rightVal) {
  const buildExpr = template.expression(`LEFT + RIGHT`);
  return buildExpr({
    LEFT: types.identifier(leftId),
    RIGHT: types.numericLiteral(rightVal),
  });
}

/**
 * Parses multiple statements into an array of Statement AST nodes using template.statements.
 * @param {string} code - Code containing statements
 * @returns {object[]} Array of Statement AST nodes
 */
export function parseStatements(code) {
  const buildStmts = template.statements(code);
  return buildStmts();
}

export { template, types };
test/contract.mjs
import assert from 'node:assert/strict';
import {
  template,
  types,
  buildVariableDeclaration,
  parseAst,
  buildBinaryExpression,
  parseStatements,
} from '../src/index.mjs';

// 1. template parses JavaScript code templates into AST statements with placeholder substitution
{
  const decl = buildVariableDeclaration('answer', 42);
  assert.equal(decl.type, 'VariableDeclaration');
  assert.equal(decl.kind, 'const');
  assert.equal(decl.declarations[0].id.name, 'answer');
  assert.equal(decl.declarations[0].init.value, 42);

  const buildRequire = template(`const IMPORT_NAME = require(SOURCE);`);
  const requireAst = buildRequire({
    IMPORT_NAME: types.identifier('myLib'),
    SOURCE: types.stringLiteral('my-lib'),
  });
  assert.equal(requireAst.type, 'VariableDeclaration');
  assert.equal(requireAst.declarations[0].id.name, 'myLib');
  assert.equal(requireAst.declarations[0].init.arguments[0].value, 'my-lib');
}

// 2. template.ast directly parses source strings and tagged template literals into AST nodes
{
  const astFromString = parseAst(`const x = 10;`);
  assert.equal(astFromString.type, 'VariableDeclaration');
  assert.equal(astFromString.declarations[0].id.name, 'x');
  assert.equal(astFromString.declarations[0].init.value, 10);

  const fnAst = template.ast`function ${types.identifier('greet')}(name) { return "hello " + name; }`;
  assert.equal(fnAst.type, 'FunctionDeclaration');
  assert.equal(fnAst.id.name, 'greet');
  assert.equal(fnAst.params[0].name, 'name');
}

// 3. template.expression creates an AST builder specialized for expressions
{
  const exprAst = buildBinaryExpression('counter', 5);
  assert.equal(exprAst.type, 'BinaryExpression');
  assert.equal(exprAst.operator, '+');
  assert.equal(exprAst.left.name, 'counter');
  assert.equal(exprAst.right.value, 5);

  const directExpr = template.expression(`A * B`)({
    A: types.identifier('x'),
    B: types.identifier('y'),
  });
  assert.equal(directExpr.type, 'BinaryExpression');
  assert.equal(directExpr.operator, '*');
  assert.equal(directExpr.left.name, 'x');
  assert.equal(directExpr.right.name, 'y');
}

// 4. template.statements parses code into an array of Statement AST nodes
{
  const stmts = parseStatements(`const a = 1; let b = 2; return a + b;`);
  assert.equal(Array.isArray(stmts), true);
  assert.equal(stmts.length, 3);
  assert.equal(stmts[0].type, 'VariableDeclaration');
  assert.equal(stmts[0].declarations[0].id.name, 'a');
  assert.equal(stmts[1].type, 'VariableDeclaration');
  assert.equal(stmts[1].declarations[0].id.name, 'b');
  assert.equal(stmts[2].type, 'ReturnStatement');
}

console.log('Contract assertions passed.');

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