cfg-if 1.0.4: cfg_if

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

[[package]]
name = "cfg-if"
version = "1.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"

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

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

[dependencies]
cfg-if = "=1.0.4"

[[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 pkg:cargo/cfg-if@1.0.4
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/cfg-if@1.0.4
Demonstrate these symbols/APIs:
  - cfg_if

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:c0fbc94eabf97748f5445fd4bdf16aa2d4d848dbe9b1de2394dd9e795c2a7c92","contract":["cfg_if conditionally defines items based on target configuration","cfg_if selects fallback branch when no conditions match","cfg_if emits multiple items within a single conditional branch","cfg_if functions properly within local block scopes"],"goal":"verify pkg:cargo/cfg-if@1.0.4","kind":"HOW","packages":["pkg:cargo/cfg-if@1.0.4"],"schemaVersion":1,"symbols":["cfg_if"]},"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/cfg-if@1.0.4"],"schemaVersion":1,"subject":"pkg:cargo/cfg-if@1.0.4","symbols":["cfg_if"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/cfg-if@1.0.4",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/cfg-if@1.0.4"
  ],
  "symbols": [
    "cfg_if"
  ]
}

//! Clean-room verification sample for cfg-if.

pub use cfg_if::*;

use cfg_if::cfg_if;

// 1. Top-level item conditional compilation matching target configuration
cfg_if! {
    if #[cfg(target_family = "unix")] {
        fn platform_family() -> &'static str {
            "unix"
        }
    } else if #[cfg(target_family = "windows")] {
        fn platform_family() -> &'static str {
            "windows"
        }
    } else {
        fn platform_family() -> &'static str {
            "other"
        }
    }
}

// 2. Fallback branch execution when conditions are false
cfg_if! {
    if #[cfg(all(target_os = "linux", target_os = "windows"))] {
        fn is_fallback() -> bool {
            false
        }
    } else {
        fn is_fallback() -> bool {
            true
        }
    }
}

// 3. Multiple items emitted within a single branch
cfg_if! {
    if #[cfg(any(target_pointer_width = "32", target_pointer_width = "64"))] {
        const CONST_A: u32 = 100;
        const CONST_B: u32 = 200;
    } else {
        const CONST_A: u32 = 0;
        const CONST_B: u32 = 0;
    }
}

fn main() {
    // 1. cfg_if conditionally defines items based on target configuration
    let family = platform_family();
    #[cfg(target_family = "unix")]
    assert_eq!(family, "unix");
    #[cfg(target_family = "windows")]
    assert_eq!(family, "windows");

    // 2. cfg_if selects fallback branch when no conditions match
    assert!(is_fallback());

    // 3. cfg_if emits multiple items within a single conditional branch
    assert_eq!(CONST_A + CONST_B, 300);

    // 4. cfg_if functions properly within local block scopes
    cfg_if! {
        if #[cfg(all())] {
            let scoped_val = 42;
        } else {
            let scoped_val = 0;
        }
    }
    assert_eq!(scoped_val, 42);

    println!("All cfg-if contract assertions passed successfully.");
}