CodeSampleX

サンプル

@babel/core 7.26.10: template

検証済みサンプル — npm @babel/core 7.26.10: template. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました: babel.template creates template functions that…

sha256:e00b330ef511671b7337ee8c0c9e7121dc99839cd65b2954d8dd2a00f2ea76a4

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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

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…		 2026-08-27

ケース

HOW
ゴール
verify @babel/core.template in pkg:npm/%40babel/core@7.26.10
パッケージ
シンボル
  • @babel/core.template
環境
node 22.23.2
作成日
2026-08-27T11:53:53Z

コントラクト

  1. babel.template creates template functions that replace uppercase placeholder identifiers with provided AST nodes or identifiers, returning Statement AST nodes by default
  2. babel.template.ast directly parses code strings into AST nodes without requiring template invocation or placeholder substitution
  3. babel.template.expression generates Expression AST nodes from template strings with placeholder substitutions
  4. babel.template.statements parses multi-statement templates into an array of Statement AST nodes
  5. babel.template.program creates a complete Program AST node from template strings
  6. babel.template supports syntacticPlaceholders option for %%placeholder%% style token replacements
  7. babel.template functions throw an error when invalid template strings are parsed

ファイル

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • 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 @babel/core.template in pkg:npm/%40babel/core@7.26.10
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/core@7.26.10
Demonstrate these symbols/APIs:
  - @babel/core.template
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: esm
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:sha256:40571e1e8b2ea0dcd1b80051f9cc1a85b2b22aa2804b4fbe1d6e41ce8a825ec0","constraints":{"executionContext":"node"},"contract":["babel.template creates template functions that replace uppercase placeholder identifiers with provided AST nodes or identifiers, returning Statement AST nodes by default","babel.template.ast directly parses code strings into AST nodes without requiring template invocation or placeholder substitution","babel.template.expression generates Expression AST nodes from template strings with placeholder substitutions","babel.template.statements parses multi-statement templates into an array of Statement AST nodes","babel.template.program creates a complete Program AST node from template strings","babel.template supports syntacticPlaceholders option for %%placeholder%% style token replacements","babel.template functions throw an error when invalid template strings are parsed"],"goal":"verify @babel/core.template in pkg:npm/%40babel/core@7.26.10","kind":"HOW","packages":["pkg:npm/%40babel/core@7.26.10"],"schemaVersion":1,"symbols":["@babel/core.template"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40babel/core@7.26.10"],"schemaVersion":1,"subject":"pkg:npm/%40babel/core@7.26.10","symbols":["@babel/core.template"],"verifierAdapter":"node-typescript@1"}
package-lock.json
{
  "name": "sample-babel-template",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-babel-template",
      "version": "1.0.0",
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      }
    },
    "node_modules/@ampproject/remapping": {
      "version": "2.3.0",
      "resolved": "https://registry.npmjs.org/@ampproject/remapping/-/remapping-2.3.0.tgz",
      "integrity": "sha512-30iZtAPgz+LTIYoeivqYo853f02jBYSd5uGnGpkFV0M3xOt9aN73erkgYAmZU43x4VfqcnLxW9Kpg3R5LC4YYw==",
      "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-template",
  "version": "1.0.0",
  "description": "verify @babel/core.template in pkg:npm/%40babel/core@7.26.10",
  "type": "module",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@babel/core": "7.26.10"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @babel/core.template in pkg:npm/%40babel/core@7.26.10",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/core@7.26.10"
  ],
  "symbols": [
    "@babel/core.template"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "esm",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
import babel from '@babel/core';

/**
 * Builds a function declaration AST node using babel.template.
 *
 * @param {string} functionName - The identifier name for the function.
 * @param {string} paramName - The identifier name for the parameter.
 * @returns {object} The FunctionDeclaration AST node.
 */
export function buildFunction(functionName, paramName) {
  const fnTemplate = babel.template(`
    function FUNCTION_NAME(PARAM) {
      return PARAM * 2;
    }
  `);
  return fnTemplate({
    FUNCTION_NAME: babel.types.identifier(functionName),
    PARAM: babel.types.identifier(paramName)
  });
}

/**
 * Directly parses a source code string into an AST node using babel.template.ast.
 *
 * @param {string} code - The JavaScript source code.
 * @returns {object} The parsed AST node.
 */
export function parseAst(code) {
  return babel.template.ast(code);
}

/**
 * Builds an expression AST node using babel.template.expression.
 *
 * @param {string} exprCode - The expression code template.
 * @param {object} [replacements={}] - Placeholder replacement mapping.
 * @returns {object} The Expression AST node.
 */
export function buildExpression(exprCode, replacements = {}) {
  const exprTemplate = babel.template.expression(exprCode);
  return exprTemplate(replacements);
}

/**
 * Builds an array of statement AST nodes using babel.template.statements.
 *
 * @param {string} statementsCode - The multi-statement code template.
 * @param {object} [replacements={}] - Placeholder replacement mapping.
 * @returns {Array<object>} Array of Statement AST nodes.
 */
export function buildStatements(statementsCode, replacements = {}) {
  const stmtsTemplate = babel.template.statements(statementsCode);
  return stmtsTemplate(replacements);
}

/**
 * Builds a Program AST node using babel.template.program.
 *
 * @param {string} code - The code template.
 * @param {object} [replacements={}] - Placeholder replacement mapping.
 * @returns {object} The Program AST node.
 */
export function buildProgram(code, replacements = {}) {
  const programTemplate = babel.template.program(code);
  return programTemplate(replacements);
}

/**
 * Builds an AST node using syntactic placeholders (%%name%%).
 *
 * @param {string} templateCode - The code template using %%name%% syntax.
 * @param {object} replacements - Placeholder replacement mapping.
 * @returns {object} The resulting AST node.
 */
export function buildWithSyntacticPlaceholders(templateCode, replacements) {
  const templateFn = babel.template(templateCode, {
    syntacticPlaceholders: true
  });
  return templateFn(replacements);
}
test/contract.mjs
import assert from 'node:assert';
import babel from '@babel/core';
import {
  buildFunction,
  parseAst,
  buildExpression,
  buildStatements,
  buildProgram,
  buildWithSyntacticPlaceholders
} from '../src/index.js';

// 1. babel.template creates template functions that replace uppercase placeholder identifiers with provided AST nodes or identifiers, returning Statement AST nodes by default
{
  const ast = buildFunction('doubleValue', 'num');
  assert(ast !== null && typeof ast === 'object', 'AST must be an object');
  assert.strictEqual(ast.type, 'FunctionDeclaration', 'Result node must be a FunctionDeclaration');
  assert.strictEqual(ast.id.name, 'doubleValue', 'Function name placeholder must be replaced');
  assert.strictEqual(ast.params.length, 1, 'Function must have 1 parameter');
  assert.strictEqual(ast.params[0].name, 'num', 'Parameter name placeholder must be replaced');
  assert.strictEqual(ast.body.type, 'BlockStatement', 'Function body must be BlockStatement');
}

// 2. babel.template.ast directly parses code strings into AST nodes without requiring template invocation or placeholder substitution
{
  const ast = parseAst('const answer = 42;');
  assert(ast !== null && typeof ast === 'object', 'AST must be an object');
  assert.strictEqual(ast.type, 'VariableDeclaration', 'Directly parsed node must be a VariableDeclaration');
  assert.strictEqual(ast.kind, 'const');
  assert.strictEqual(ast.declarations[0].id.name, 'answer');
  assert.strictEqual(ast.declarations[0].init.value, 42);
}

// 3. babel.template.expression generates Expression AST nodes from template strings with placeholder substitutions
{
  const exprAst = buildExpression('LEFT + RIGHT * 2', {
    LEFT: babel.types.identifier('base'),
    RIGHT: babel.types.numericLiteral(10)
  });
  assert(exprAst !== null && typeof exprAst === 'object', 'Expression AST must be an object');
  assert.strictEqual(exprAst.type, 'BinaryExpression', 'Expression must be a BinaryExpression');
  assert.strictEqual(exprAst.operator, '+');
  assert.strictEqual(exprAst.left.type, 'Identifier');
  assert.strictEqual(exprAst.left.name, 'base');
  assert.strictEqual(exprAst.right.type, 'BinaryExpression');
}

// 4. babel.template.statements parses multi-statement templates into an array of Statement AST nodes
{
  const statements = buildStatements(`
    const first = 1;
    const second = 2;
  `);
  assert(Array.isArray(statements), 'Statements result must be an array');
  assert.strictEqual(statements.length, 2, 'Must produce exactly 2 statements');
  assert.strictEqual(statements[0].type, 'VariableDeclaration');
  assert.strictEqual(statements[0].declarations[0].id.name, 'first');
  assert.strictEqual(statements[1].type, 'VariableDeclaration');
  assert.strictEqual(statements[1].declarations[0].id.name, 'second');
}

// 5. babel.template.program creates a complete Program AST node from template strings
{
  const programAst = buildProgram('const x = VALUE;', {
    VALUE: babel.types.numericLiteral(100)
  });
  assert(programAst !== null && typeof programAst === 'object', 'Program AST must be an object');
  assert.strictEqual(programAst.type, 'Program', 'Result must be a Program AST node');
  assert.strictEqual(programAst.body.length, 1);
  assert.strictEqual(programAst.body[0].type, 'VariableDeclaration');
}

// 6. babel.template supports syntacticPlaceholders option for %%placeholder%% style token replacements
{
  const ast = buildWithSyntacticPlaceholders('const %%varName%% = %%initVal%%;', {
    varName: babel.types.identifier('result'),
    initVal: babel.types.stringLiteral('success')
  });
  assert(ast !== null && typeof ast === 'object', 'AST must be an object');
  assert.strictEqual(ast.type, 'VariableDeclaration');
  assert.strictEqual(ast.declarations[0].id.name, 'result');
  assert.strictEqual(ast.declarations[0].init.type, 'StringLiteral');
  assert.strictEqual(ast.declarations[0].init.value, 'success');
}

// 7. babel.template functions throw an error when invalid template strings are parsed
{
  assert.throws(
    () => {
      babel.template('const = ;')();
    },
    (err) => {
      return err instanceof Error;
    },
    'Invalid template string must throw an Error'
  );
}

console.log('All contract assertions passed successfully.');

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