itoa 1.0.18: itoa::Buffer

# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4

[[package]]
name = "itoa"
version = "1.0.18"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"

[[package]]
name = "sample-itoa-buffer"
version = "1.0.0"
dependencies = [
 "itoa",
]

[package]
name = "sample-itoa-buffer"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
itoa = "=1.0.18"

[[bin]]
name = "contract"
path = "test/contract.rs"

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 itoa::Buffer in pkg:cargo/itoa@1.0.18
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/itoa@1.0.18
Demonstrate these symbols/APIs:
  - itoa::Buffer

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.

{"case":{"caseId":"case:sha256:8a0bf81c8a29554c36e09ef53e860c02ff502ed62f63e55cecc57cc2a068af04","contract":["itoa::Buffer formats zero and positive integers to string slices","itoa::Buffer formats negative integers with leading minus signs","itoa::Buffer formats boundary values for integer primitives","itoa::Buffer reuses stack buffer across consecutive format invocations"],"goal":"verify itoa::Buffer in pkg:cargo/itoa@1.0.18","kind":"HOW","packages":["pkg:cargo/itoa@1.0.18"],"schemaVersion":1,"symbols":["itoa::Buffer"]},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","distro":"alpine","ecosystem":"cargo","libc":"musl","os":"linux","packageManager":"cargo","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/itoa@1.0.18"],"schemaVersion":1,"subject":"pkg:cargo/itoa@1.0.18","symbols":["itoa::Buffer"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify itoa::Buffer in pkg:cargo/itoa@1.0.18",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/itoa@1.0.18"
  ],
  "symbols": [
    "itoa::Buffer"
  ]
}

//! Clean-room verification sample for itoa::Buffer.

pub use itoa::Buffer;

use itoa::Buffer;

fn main() {
    let mut buffer = Buffer::new();

    // 1. itoa::Buffer formats zero and positive integers to string slices
    assert_eq!(buffer.format(0u8), "0");
    assert_eq!(buffer.format(1u8), "1");
    assert_eq!(buffer.format(42u32), "42");
    assert_eq!(buffer.format(128u64), "128");
    assert_eq!(buffer.format(1234567890u64), "1234567890");

    // 2. itoa::Buffer formats negative integers with leading minus signs
    assert_eq!(buffer.format(-1i8), "-1");
    assert_eq!(buffer.format(-42i32), "-42");
    assert_eq!(buffer.format(-987654321i64), "-987654321");

    // 3. itoa::Buffer formats boundary values for integer primitives
    assert_eq!(buffer.format(u8::MAX), "255");
    assert_eq!(buffer.format(i8::MIN), "-128");
    assert_eq!(buffer.format(i8::MAX), "127");
    assert_eq!(buffer.format(u64::MAX), "18446744073709551615");
    assert_eq!(buffer.format(i64::MIN), "-9223372036854775808");
    assert_eq!(buffer.format(i64::MAX), "9223372036854775807");
    assert_eq!(buffer.format(u128::MAX), "340282366920938463463374607431768211455");
    assert_eq!(buffer.format(i128::MIN), "-170141183460469231731687303715884105728");
    assert_eq!(buffer.format(i128::MAX), "170141183460469231731687303715884105727");

    // 4. itoa::Buffer reuses stack buffer across consecutive format invocations
    let first = buffer.format(100u32);
    assert_eq!(first, "100");
    let second = buffer.format(200u32);
    assert_eq!(second, "200");
    let third = buffer.format(0i32);
    assert_eq!(third, "0");

    println!("All itoa::Buffer contract assertions passed successfully.");
}