proc-macro2 1.0.107

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

[[package]]
name = "proc-macro2"
version = "1.0.107"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "985e7ec9bb745e6ce6535b544d84d6cd6f7ad8bd711c398938ae983b91a766d9"
dependencies = [
 "unicode-ident",
]

[[package]]
name = "sample-proc-macro2"
version = "1.0.0"
dependencies = [
 "proc-macro2",
]

[[package]]
name = "unicode-ident"
version = "1.0.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"

[package]
name = "sample-proc-macro2"
version = "1.0.0"
edition = "2021"
publish = false

[dependencies]
proc-macro2 = "=1.0.107"

[[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/proc-macro2@1.0.107
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/proc-macro2@1.0.107

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:bf7125a72f80ad08c79905ddfa6198def4d3299f80ebeef4d87f9d7f239ccbbf","contract":["TokenStream::from_str parses Rust code into a stream of TokenTree elements","Ident::new constructs an identifier with call_site span","Literal constructors create string and unsuffixed integer token representations","Group wraps a TokenStream in specified Delimiter delimiters","Span::call_site provides source location context for generated tokens"],"goal":"verify pkg:cargo/proc-macro2@1.0.107","kind":"HOW","packages":["pkg:cargo/proc-macro2@1.0.107"],"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/proc-macro2@1.0.107"],"schemaVersion":1,"subject":"pkg:cargo/proc-macro2@1.0.107","verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify pkg:cargo/proc-macro2@1.0.107",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/proc-macro2@1.0.107"
  ]
}

//! Clean-room verification sample for proc-macro2.

pub use proc_macro2::*;

use std::str::FromStr;
use proc_macro2::{Delimiter, Group, Ident, Literal, Span, TokenStream, TokenTree};

fn main() {
    // 1. TokenStream parsing and construction
    let stream = TokenStream::from_str("let x = 42;").expect("valid token stream");
    assert!(!stream.is_empty());
    let tokens: Vec<TokenTree> = stream.clone().into_iter().collect();
    assert_eq!(tokens.len(), 5);

    // 2. Ident creation and properties
    let ident = Ident::new("test_identifier", Span::call_site());
    assert_eq!(ident.to_string(), "test_identifier");

    // 3. Literal creation and formatting
    let str_lit = Literal::string("hello world");
    assert_eq!(str_lit.to_string(), "\"hello world\"");

    let int_lit = Literal::u64_unsuffixed(12345);
    assert_eq!(int_lit.to_string(), "12345");

    // 4. Group delimiter and inner stream wrapping
    let inner_stream = TokenStream::from_str("a + b").expect("inner stream");
    let group = Group::new(Delimiter::Parenthesis, inner_stream);
    assert_eq!(group.delimiter(), Delimiter::Parenthesis);
    assert_eq!(group.to_string(), "(a + b)");

    // 5. Span call_site
    let span = Span::call_site();
    let _ = format!("{:?}", span);

    println!("All proc-macro2 contract assertions passed successfully.");
}