Exemplo
@babel/plugin-syntax-bigint 7.8.3: parse BigInt literals using @babel/plugin-syntax-bigint
Amostra verificada para npm @babel/plugin-syntax-bigint 7.8.3: parse BigInt literals using @babel/plugin-syntax-bigint. O contrato rodou em node 22 · linux…
sha256:18f3b383a13b98efe7bd16bd07513429a069699a432902bb3c80746a5fcf30b8
Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu.
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MIT-0
Evidência de execução
O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.
- Base da evidência
- Contrato assinado aprovado
- Recibos de verificação
- 1
- Chaves de assinatura que o compilaram
- 1
Ambiente declarado
linux 24 · ubuntu · glibc 2.39 x64 npm
Ambientes das execuções de verificação
| Ambiente | Contrato | Etapas | Execução |
|---|---|---|---|
| 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 |
Caso
HOW- Objetivo
- parse BigInt literals using @babel/plugin-syntax-bigint
- Símbolos
-
- @babel/plugin-syntax-bigint
- Criado
- 2026-08-26T14:20:48Z
Contrato
- 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
Arquivos
- PROMPT.md
- csx.json
- package-lock.json
- package.json
- spec.json
- src/index.mjs
- test/contract.mjs
Código-fonte
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.
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}
{
"name": "sample-syntax-bigint",
"version": "1.0.0",
"type": "module",
"dependencies": {
"@babel/core": "^7.26.0",
"@babel/plugin-syntax-bigint": "7.8.3"
}
}
{
"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"
]
}
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 };
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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