potential_utf 0.1.6

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# It is not intended for manual editing.
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[dependencies]
potential_utf = "=0.1.6"

[[bin]]
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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 pkg:cargo/potential_utf@0.1.6
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/potential_utf@0.1.6

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:sha256:9a76438c9bd17e25a3f3130d971a4bf7517cf486c31ce1a9eec89b805f089506","contract":["PotentialUtf8 represents unvalidated byte slice and parses valid UTF-8 string via try_as_str or rejects invalid UTF-8 bytes","PotentialUtf8 converts from str and byte slice and compares equal to str slices","PotentialUtf16 decodes u16 slices to characters replacing invalid surrogates with replacement character","PotentialCodePoint converts to and from valid char and converts invalid scalar values to replacement character via to_char_lossy","PotentialCodePoint compares and orders with char and numeric representations"],"goal":"verify pkg:cargo/potential_utf@0.1.6","kind":"HOW","packages":["pkg:cargo/potential_utf@0.1.6"],"schemaVersion":1},"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/potential_utf@0.1.6"],"schemaVersion":1,"subject":"pkg:cargo/potential_utf@0.1.6","verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/potential_utf@0.1.6",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/potential_utf@0.1.6"
  ]
}

//! Clean-room verification sample for potential_utf.

pub use potential_utf::*;

use potential_utf::{PotentialCodePoint, PotentialUtf16, PotentialUtf8};

fn main() {
    // 1. PotentialUtf8 represents unvalidated byte slice and parses valid UTF-8 string via try_as_str or rejects invalid UTF-8 bytes
    let valid_bytes = b"Hello, CodeSampleX!";
    let p_valid = PotentialUtf8::from_bytes(valid_bytes);
    assert_eq!(p_valid.as_bytes(), valid_bytes);
    assert_eq!(p_valid.try_as_str(), Ok("Hello, CodeSampleX!"));

    let invalid_bytes = &[0xFF, 0xFE, 0xFD];
    let p_invalid = PotentialUtf8::from_bytes(invalid_bytes);
    assert_eq!(p_invalid.as_bytes(), invalid_bytes);
    assert!(p_invalid.try_as_str().is_err());

    // 2. PotentialUtf8 converts from str and byte slice and compares equal to str slices
    let from_str = PotentialUtf8::from_str("sample_test");
    assert_eq!(from_str, "sample_test");
    assert_eq!("sample_test", from_str);
    assert_eq!(from_str.len(), 11);

    // 3. PotentialUtf16 decodes u16 slices to characters replacing invalid surrogates with replacement character
    let u16_data = [0x0048, 0x0069, 0xD800, 0x0021];
    let p_utf16 = PotentialUtf16::from_slice(&u16_data);
    let chars: Vec<char> = p_utf16.chars().collect();
    assert_eq!(chars, vec!['H', 'i', char::REPLACEMENT_CHARACTER, '!']);

    // 4. PotentialCodePoint converts to and from valid char and converts invalid scalar values to replacement character via to_char_lossy
    let cp_ascii = PotentialCodePoint::from_char('A');
    assert_eq!(cp_ascii.try_to_char(), Ok('A'));
    assert_eq!(cp_ascii.to_char_lossy(), 'A');

    let cp_unicode = PotentialCodePoint::from_char('🦀');
    assert_eq!(cp_unicode.try_to_char(), Ok('🦀'));

    let cp_invalid = PotentialCodePoint::from_u24(0xD800);
    assert!(cp_invalid.try_to_char().is_err());
    assert_eq!(cp_invalid.to_char_lossy(), char::REPLACEMENT_CHARACTER);

    // 5. PotentialCodePoint compares and orders with char and numeric representations
    assert_eq!(cp_ascii, 'A');
    assert_eq!('A', cp_ascii);
    assert_eq!(u32::from(cp_ascii), 0x41);
    assert_eq!(PotentialCodePoint::from_u24(0x41), cp_ascii);
    assert!(cp_ascii < PotentialCodePoint::from_char('B'));

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