示例
semver 1.0.28: Check a version against a caret requirement with the semver crate in Rust
已验证示例 — cargo semver 1.0.28: Check a version against a caret requirement with the semver crate in Rust. contract 在 rust 1 · linux alpine/x64 · docker 上运行并通过.
sha256:c191ec9b36048a433bed234d5c9bf24b677fdf4fc021f0c226ccf6e0e850be06
本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。
提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。
MIT-0
执行证据
声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。
- 证据依据
- 签名契约通过
- 验证回执
- 3
- 构建过它的签名密钥
- 3
声明的环境
rust 1 linux x64 rust 1 rust cargo
验证运行环境
| 环境 | 契约 | 阶段 | 运行日期 |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-13 |
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-17 |
| 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… |
2026-09-08 |
案例
HOW- 目标
- Check a version against a caret requirement with the semver crate in Rust
- 符号
-
- Version::parse
- VersionReq::matches
- 环境
- rust 1
- 创建时间
- 2026-08-13T15:47:40Z
契约
- parse a version and a requirement
- assert a version inside the caret range matches
- assert the next major does not
- assert a prerelease is excluded from a plain requirement
文件
- Cargo.lock
- Cargo.toml
- csx.json
- src/main.rs
源代码
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4
[[package]]
name = "csx-sample-semver"
version = "1.0.0"
dependencies = [
"semver",
]
[[package]]
name = "semver"
version = "1.0.28"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8a7852d02fc848982e0c167ef163aaff9cd91dc640ba85e263cb1ce46fae51cd"
[package]
name = "csx-sample-semver"
version = "1.0.0"
edition = "2021"
license = "MIT-0"
[dependencies]
semver = "1.0.28"
{"case":{"caseId":"case:sha256:890d32e844db56240a414a1479cbe98efa06b4e4f94f1545a296faa55f042f53","constraints":{"runtime":"rust"},"contract":["parse a version and a requirement","assert a version inside the caret range matches","assert the next major does not","assert a prerelease is excluded from a plain requirement"],"goal":"Check a version against a caret requirement with the semver crate in Rust","kind":"HOW","packages":["pkg:cargo/semver@1.0.28"],"schemaVersion":1,"symbols":["Version::parse","VersionReq::matches"]},"contractCommand":["cargo","run","--offline","--quiet"],"environment":{"arch":"x64","ecosystem":"cargo","executionContext":"rust","language":"rust","os":"linux","packageManager":"cargo","runtime":"rust","runtimeVersion":"1","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/semver@1.0.28"],"schemaVersion":1,"symbols":["Version::parse","VersionReq::matches"],"verifierAdapter":"cargo@1"}
use semver::{Version, VersionReq};
/// Reports whether `version` satisfies `req`.
///
/// Two rules bite here. A prerelease is excluded from an ordinary
/// requirement even when it falls numerically inside it, so "1.13.0-beta.1"
/// fails "^1.0". And `^0.x` is far narrower than `^1.x`: for a 0.y.z crate
/// the MINOR version is the breaking one, so "^0.3" excludes 0.4.
fn fits(version: &str, req: &str) -> bool {
let v = Version::parse(version).expect("version parses");
VersionReq::parse(req).expect("requirement parses").matches(&v)
}
fn main() {
assert!(fits("1.12.0", "^1.0"));
assert!(!fits("2.0.0", "^1.0"));
// Prereleases are excluded from a plain requirement.
assert!(!fits("1.13.0-beta.1", "^1.0"));
// Zero-major: the minor version is the breaking one.
assert!(fits("0.3.9", "^0.3"));
assert!(!fits("0.4.0", "^0.3"));
assert!(Version::parse("not-a-version").is_err());
println!("CONTRACT PASS: semver crate applied caret and prerelease rules");
}