73 lines
3.2 KiB
Markdown
73 lines
3.2 KiB
Markdown
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# Serde path to error
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[<img alt="github" src="https://img.shields.io/badge/github-dtolnay/path--to--error-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/dtolnay/path-to-error)
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[<img alt="crates.io" src="https://img.shields.io/crates/v/serde_path_to_error.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/serde_path_to_error)
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[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-serde__path__to__error-66c2a5?style=for-the-badge&labelColor=555555&logoColor=white&logo=data:image/svg+xml;base64,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" height="20">](https://docs.rs/serde_path_to_error)
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[<img alt="build status" src="https://img.shields.io/github/workflow/status/dtolnay/path-to-error/CI/master?style=for-the-badge" height="20">](https://github.com/dtolnay/path-to-error/actions?query=branch%3Amaster)
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Find out the path at which a deserialization error occurred. This crate provides
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a wrapper that works with any existing Serde `Deserializer` and exposes the
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chain of field names leading to the error.
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```toml
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[dependencies]
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serde = "1.0"
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serde_path_to_error = "0.1"
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```
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```rust
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use serde::Deserialize;
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use std::collections::BTreeMap as Map;
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#[derive(Deserialize)]
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struct Package {
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name: String,
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dependencies: Map<String, Dependency>,
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}
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#[derive(Deserialize)]
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struct Dependency {
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version: String,
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}
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fn main() {
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let j = r#"{
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"name": "demo",
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"dependencies": {
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"serde": {
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"version": 1
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}
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}
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}"#;
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// Some Deserializer.
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let jd = &mut serde_json::Deserializer::from_str(j);
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let result: Result<Package, _> = serde_path_to_error::deserialize(jd);
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match result {
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Ok(_) => panic!("expected a type error"),
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Err(err) => {
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let path = err.path().to_string();
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assert_eq!(path, "dependencies.serde.version");
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}
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}
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}
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```
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<br>
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#### License
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<sup>
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Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
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2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
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</sup>
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<br>
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<sub>
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Unless you explicitly state otherwise, any contribution intentionally submitted
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for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
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be dual licensed as above, without any additional terms or conditions.
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</sub>
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