writeable 0.6.4: writeable

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

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

[[package]]
name = "writeable"
version = "0.6.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3ad82d2a33cdc9674dc7465672f271e096168fcdbe0f799d9e6db8c5892679dc"

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

[dependencies]
writeable = "=0.6.4"

[[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 writeable in pkg:cargo/writeable@0.6.4
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/writeable@0.6.4
Demonstrate these symbols/APIs:
  - writeable

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:sha256:1d5bd71dadb71092d5d55e59b019c74f19c60b4dff464bc431421767ffb43735","contract":["writeable produces formatted string via write_to_string","writeable matches expected string via assert_writeable_eq","writeable length hint returns exact length","writeable integrates with Display via impl_display_with_writeable"],"goal":"verify writeable in pkg:cargo/writeable@0.6.4","kind":"HOW","packages":["pkg:cargo/writeable@0.6.4"],"schemaVersion":1,"symbols":["writeable"]},"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/writeable@0.6.4"],"schemaVersion":1,"subject":"pkg:cargo/writeable@0.6.4","symbols":["writeable"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify writeable in pkg:cargo/writeable@0.6.4",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/writeable@0.6.4"
  ],
  "symbols": [
    "writeable"
  ]
}

//! Clean-room verification sample for writeable.

pub use writeable::*;

use std::fmt;
use writeable::assert_writeable_eq;
use writeable::LengthHint;
use writeable::Writeable;

struct Greeting<'s> {
    name: &'s str,
}

impl<'s> Writeable for Greeting<'s> {
    fn write_to<W: fmt::Write + ?Sized>(&self, sink: &mut W) -> fmt::Result {
        sink.write_str("Hello, ")?;
        sink.write_str(self.name)?;
        sink.write_char('!')
    }

    fn writeable_length_hint(&self) -> LengthHint {
        LengthHint::exact(8 + self.name.len())
    }
}

writeable::impl_display_with_writeable!(Greeting<'_>);

fn main() {
    let greeting = Greeting { name: "World" };

    // 1. writeable produces formatted string via write_to_string
    assert_eq!(greeting.write_to_string(), "Hello, World!");

    // 2. writeable matches expected string via assert_writeable_eq
    assert_writeable_eq!(&greeting, "Hello, World!");

    // 3. writeable length hint returns exact length
    assert_eq!(greeting.writeable_length_hint(), LengthHint::exact(13));

    // 4. writeable integrates with Display via impl_display_with_writeable
    assert_eq!(greeting.to_string(), "Hello, World!");

    println!("All writeable contract assertions passed successfully.");
}