CodeSampleX

示例

@babel/core 7.26.0: template

已验证示例 — npm @babel/core 7.26.0: template. contract 在 node 22 · linux debian/x64 · docker 上运行并通过： template parses JavaScript code templates into AST…

sha256:47f09ef30d04d1bf98cdeb4074ef0aa1bde50196d2bab004aa7610c7cef03b21

本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。 提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。 MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据
签名契约通过
验证回执
1
构建过它的签名密钥
1
声明的环境 linux 24 · ubuntu · glibc 2.39 x64 npm

验证运行环境

环境 契约 阶段 运行日期
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

案例

HOW
目标
verify template in pkg:npm/%40babel/core@7.26.0
包
符号
  • template
创建时间
2026-09-03T11:42:46Z

契约

  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

文件

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

下载源代码构件 (tar.gz)

源代码

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,
  "packages": {
    "": {
      "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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