示例

thiserror automatically infers Error::source for unannotated fields named source while ignoring unannotated non-source field names that implement Error

sha256:8359acd63bf0058c3a7a4b2520fa133d9084a422708f8513560e48e6db8cd56b

案例

目标

thiserror automatically infers Error::source for unannotated fields named source while ignoring unannotated non-source field names that implement Error HOW

包

thiserror 2.0.20

环境

rust

创建时间

2026-08-17T19:27:51Z

常见的想当然

Any field implementing std::error::Error is automatically inferred as the error source or requires explicit #[source] regardless of field name

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• Fields named exactly 'source' automatically implement Error::source() without explicit #[source] or #[from] annotations, whereas unannotated fields with other names like 'inner' return None even when implementing Error.
• Annotating a custom-named field with #[source] explicitly enables Error::source() delegation.
• Trailing arguments after the format string in #[error("...", ...)] support field expressions using .field shorthand notation.
• Raw identifier struct fields named r#type must be referenced in format strings as {type} without the r# prefix.
• Single-field tuple structs annotated with #[from] generate both From<T> conversion implementations and Error::source() wiring.

文件

• Cargo.lock
• Cargo.toml
• NOTES.md
• csx.json
• src/lib.rs

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• rust 1 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · cargo@1 · 2026-08-17 · ed25519:d91480838ac982c9