CodeSampleX

Sample

icu_collections 2.3.0

Verified sample for cargo icu_collections 2.3.0. The contract ran on rust 1 · linux alpine/x64 · docker and passed: CodePointInversionListBuilder constructs…

sha256:9d9c4d4d20af0d45b48f9af71484318f4de3a227a5b98b2a6f1a86820c3daccb

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment linux · alpine · musl x64 cargo

Verification-run environments

Environment Contract Stages Run
rust 1 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · cargo@1rust:1-alpine@sha256:a10e64dd139b…		 2026-09-19

Case

HOW
Goal
verify pkg:cargo/icu_collections@2.3.0
Packages
Created
2026-09-18T16:34:44Z

Contract

  1. CodePointInversionListBuilder constructs a CodePointInversionList from individual characters and ranges with membership querying
  2. CodePointInversionList performs set difference, intersection, and complement transformations via CodePointInversionListBuilder
  3. CodePointInversionList iterates over individual code points and contiguous code point ranges and reports accurate set sizes
  4. CodePointInversionList spans string prefixes and suffixes to count contained or uncontained bytes
  5. CodePointInversionList provides BMP predefined set containing Basic Multilingual Plane code points

Files

  • Cargo.lock
  • Cargo.toml
  • PROMPT.md
  • csx.json
  • spec.json
  • src/lib.rs
  • test/contract.rs

Download the source artifact (tar.gz)

Source

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

[[package]]
name = "displaydoc"
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dependencies = [
 "proc-macro2",
 "quote",
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]

[[package]]
name = "icu_collections"
version = "2.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fa68d21081c4a05d5a901a1c62add574c77048b6a1c67be3b50ce0b60d4ca513"
dependencies = [
 "displaydoc",
 "potential_utf",
 "serde",
 "utf8_iter",
 "yoke",
 "zerofrom",
 "zerovec",
]

[[package]]
name = "potential_utf"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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[[package]]
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checksum = "985e7ec9bb745e6ce6535b544d84d6cd6f7ad8bd711c398938ae983b91a766d9"
dependencies = [
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1fbf4db142a473a8d80c26bbf18454ed458bf8d26c8219c331daecfdbd079001"
dependencies = [
 "proc-macro2",
]

[[package]]
name = "sample-icu-collections"
version = "1.0.0"
dependencies = [
 "icu_collections",
]

[[package]]
name = "serde"
version = "1.0.229"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4148590afebada386688f18773da617792bf2ef03ffc1e4cbd2b1d45b023e0ba"
dependencies = [
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]

[[package]]
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dependencies = [
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d245f478577f809a851594d02313b640fb437e0bb33866753cff937863096954"

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name = "utf8_iter"
version = "1.0.4"
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checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"

[[package]]
name = "yoke"
version = "0.8.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "709fe23a0424b6a435d82152b1bd3fdfb0833487d5fa90d05d42762a9891fef5"
dependencies = [
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[[package]]
name = "yoke-derive"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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[[package]]
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dependencies = [
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "34df6fc39dbd26ddc9c10e6a2984476e13acce22e64e4487636ef494369225da"
dependencies = [
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Cargo.toml
[package]
name = "sample-icu-collections"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
icu_collections = { version = "=2.3.0", features = ["alloc"] }

[[bin]]
name = "contract"
path = "test/contract.rs"
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 pkg:cargo/icu_collections@2.3.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/icu_collections@2.3.0

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:sha256:655c3d35d347708e367d4101621b8e93e8b12e727033e666c267fb742f8a1cff","contract":["CodePointInversionListBuilder constructs a CodePointInversionList from individual characters and ranges with membership querying","CodePointInversionList performs set difference, intersection, and complement transformations via CodePointInversionListBuilder","CodePointInversionList iterates over individual code points and contiguous code point ranges and reports accurate set sizes","CodePointInversionList spans string prefixes and suffixes to count contained or uncontained bytes","CodePointInversionList provides BMP predefined set containing Basic Multilingual Plane code points"],"goal":"verify pkg:cargo/icu_collections@2.3.0","kind":"HOW","packages":["pkg:cargo/icu_collections@2.3.0"],"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/icu_collections@2.3.0"],"schemaVersion":1,"subject":"pkg:cargo/icu_collections@2.3.0","verifierAdapter":"cargo@1"}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/icu_collections@2.3.0",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/icu_collections@2.3.0"
  ]
}
src/lib.rs
//! Clean-room verification sample for icu_collections.

pub use icu_collections::*;
test/contract.rs
use icu_collections::codepointinvlist::{CodePointInversionList, CodePointInversionListBuilder};

fn main() {
    // 1. CodePointInversionListBuilder constructs a CodePointInversionList from individual characters and ranges with membership querying
    let mut builder = CodePointInversionListBuilder::new();
    builder.add_range('A'..='Z');
    builder.add_char('0');
    let set = builder.build();
    assert!(set.contains('A'));
    assert!(set.contains('Z'));
    assert!(set.contains('0'));
    assert!(!set.contains('a'));
    assert!(set.contains_range('A'..='Z'));
    assert!(!set.contains_range('A'..='z'));

    // 2. CodePointInversionList performs set difference, intersection, and complement transformations via CodePointInversionListBuilder
    let mut b1 = CodePointInversionListBuilder::new();
    b1.add_range('0'..='9');
    b1.remove_char('5');
    let s1 = b1.build();
    assert!(s1.contains('4'));
    assert!(!s1.contains('5'));
    assert!(s1.contains('6'));

    let mut b2 = CodePointInversionListBuilder::new();
    b2.add_range('0'..='9');
    b2.retain_range('3'..='6');
    let s2 = b2.build();
    assert!(!s2.contains('2'));
    assert!(s2.contains('4'));
    assert!(!s2.contains('7'));

    let mut b3 = CodePointInversionListBuilder::new();
    b3.add_range('A'..='Z');
    b3.complement();
    let s3 = b3.build();
    assert!(!s3.contains('A'));
    assert!(s3.contains('a'));

    // 3. CodePointInversionList iterates over individual code points and contiguous code point ranges and reports accurate set sizes
    let mut builder = CodePointInversionListBuilder::new();
    builder.add_range('a'..='c');
    builder.add_range('x'..='z');
    let set = builder.build();
    assert_eq!(set.size(), 6);
    assert!(!set.is_empty());
    let chars: Vec<char> = set.iter_chars().collect();
    assert_eq!(chars, vec!['a', 'b', 'c', 'x', 'y', 'z']);
    assert_eq!(set.get_range_count(), 2);
    let ranges: Vec<_> = set.iter_ranges().collect();
    assert_eq!(ranges, vec!['a' as u32..='c' as u32, 'x' as u32..='z' as u32]);

    // 4. CodePointInversionList spans string prefixes and suffixes to count contained or uncontained bytes
    let mut builder = CodePointInversionListBuilder::new();
    builder.add_range('a'..='z');
    let set = builder.build();
    let test_str = "hello WORLD";
    let contained_len = set.span(test_str, true);
    assert_eq!(contained_len, 5);
    let uncontained_len = set.span(&test_str[5..], false);
    assert_eq!(uncontained_len, 6);
    let back_len = set.span_back("WORLDhello", true);
    assert_eq!(back_len, 5);

    // 5. CodePointInversionList provides BMP predefined set containing Basic Multilingual Plane code points
    let bmp = CodePointInversionList::bmp();
    assert!(bmp.contains('A'));
    assert!(bmp.contains('\u{FFFF}'));
    assert!(!bmp.contains('\u{10000}'));
    assert_eq!(bmp.size(), 0x10000);

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

Origin Seeder

anonymous