示例
clap 4.6.6: Define and test a clap 4 derive CLI across the #[clap] to #[command] and #[arg] attribute split, checking outcomes with try_parse_from and ErrorKind instead of a process
已验证示例 — cargo clap 4.6.6: Define and test a clap 4 derive CLI across the #[clap] to #[command] and #[arg] attribute split, checking outcomes with…
sha256:6e0aceb749a7c19cc2aa7a185f5f9cac427fedb08e50c9afc51b0c69de42d116
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
- 2
- 构建过它的签名密钥
- 2
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 |
2026-08-14 |
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
案例
HOW- 目标
- Define and test a clap 4 derive CLI across the #[clap] to #[command] and #[arg] attribute split, checking outcomes with try_parse_from and ErrorKind instead of a process
- 符号
-
- Parser::try_parse_from
- ArgAction::Count
- Command::build
- ErrorKind::UnknownArgument
- ErrorKind::MissingRequiredArgument
- ErrorKind::DisplayHelp
- ValueEnum
- CommandFactory::command
- 环境
- rust 1
- 创建时间
- 2026-08-14T08:54:45Z
契约
- assert the command name comes from the attribute on the struct while every argument id comes from a field and its attribute
- assert help and version are absent from the Command until Command::build injects them, and that parsing performs that build for you
- assert the clap 3 #[clap(...)] spelling still compiles under clap 4, naming the command on the struct and declaring the argument on a field
- assert a minimal invocation fills default_value_t and leaves an Option<T> option as None
- assert dropping the program name from try_parse_from makes the first real argument the program name in the usage line and reports a missing required argument
- assert -o value, --output value, --output=value and the attached -ovalue all set the same option
- assert ArgAction::Count turns -vvv into 3 and -v -v into 2
- assert -V is the version flag while -v stays the verbose counter
- assert ValueEnum renders variants in kebab-case and that pretty_json, PrettyJson and JSON are ErrorKind::InvalidValue
- assert an unknown flag is ErrorKind::UnknownArgument and that the rendered error carries the tip naming the real --output
- assert a missing required positional is ErrorKind::MissingRequiredArgument
- assert both real errors exit 2 and go to stderr
- assert --help and -h are ErrorKind::DisplayHelp with exit code 0 on stdout, not a parse failure
- assert the rendered help shows the default value and the possible values
- assert --version is ErrorKind::DisplayVersion carrying the version from the command attribute
文件
- Cargo.lock
- Cargo.toml
- csx.json
- src/main.rs