yaahc/eyre - Change AOQSHDBY3FLBJBFEIJQDYHGQOBECTYRN3KPWJWQMCVWDTB6L2IRQC

Work around bad diagnostic when missing Context import Previously the compiler would say: error[E0599]: no method named `context` found for type `std::result::Result<(), anyhow::error::Error>` in the current scope --> src/main.rs:83:13 | 83 | context(...)?; | ^^^^^^^ method not found in `std::result::Result<(), anyhow::error::Error>` | = help: items from traits can only be used if the trait is in scope help: the following trait is implemented but not in scope; perhaps add a `use` for it: | 19 | use anyhow::context::Context; where the `anyhow::context::Context` in the suggestion is not a path that is accessible to the user.

Created by David Tolnay on October 21, 2019

AOQSHDBY3FLBJBFEIJQDYHGQOBECTYRN3KPWJWQMCVWDTB6L2IRQC

Dependencies

In channels

main

Change contents

Replacement in src/context.rs at line 1 [5.642]
B:BD[5.642] → [6.837:855]
```
use crate::Error;
```
[5.642]
[7.20]
```
use crate::{Context, Error};
```

Deletion in src/context.rs at line 9 [5.642]

B:BD[5.759] → [5.759:807]

B:BD[5.807] → [8.0:90]

∅:D[8.90] → [9.0:986]

B:BD[5.807] → [9.0:986]

B:BD[9.986] → [3.46:93]

∅:D[3.93] → [9.1036:1044]

B:BD[9.1036] → [9.1036:1044]

B:BD[9.1044] → [8.91:134]

∅:D[8.134] → [5.833:887]

B:BD[5.833] → [5.833:887]

B:BD[5.887] → [10.72:182]

∅:D[11.154] → [5.981:982]

∅:D[10.182] → [5.981:982]

B:BD[5.981] → [5.981:982]

B:BD[5.982] → [9.1045:1162]

∅:D[9.1162] → [11.155:213]

B:BD[5.1043] → [11.155:213]

∅:D[11.213] → [12.101:111]

B:BD[12.101] → [12.101:111]

∅:D[12.111] → [5.1111:1155]

B:BD[5.1111] → [5.1111:1155]

B:BD[5.1155] → [13.0:26]

∅:D[13.26] → [5.1183:1186]

B:BD[5.1183] → [5.1183:1186]

/// Provides the `context` method for `Result`.
///
/// This trait is sealed and cannot be implemented for types outside of
/// `anyhow`.
///
/// # Example
///
/// ```
/// use anyhow::{Context, Result};
/// use std::fs;
/// use std::path::PathBuf;
///
/// pub struct ImportantThing {
///     path: PathBuf,
/// }
///
/// impl ImportantThing {
///     # const IGNORE: &'static str = stringify! {
///     pub fn detach(&mut self) -> Result<()> {...}
///     # };
///     # fn detach(&mut self) -> Result<()> {
///     #     unimplemented!()
///     # }
/// }
///
/// pub fn do_it(mut it: ImportantThing) -> Result<Vec<u8>> {
///     it.detach().context("failed to detach the important thing")?;
///
///     let path = &it.path;
///     let content = fs::read(path)
///         .with_context(|| format!("failed to read instrs from {}", path.display()))?;
///
///     Ok(content)
/// }
/// ```
///
/// When printed, the outermost context would be printed first and the lower
/// level underlying causes would be enumerated below.
///
/// ```console
/// Error: failed to read instrs from ./path/to/instrs.jsox
///
/// caused by:
///     No such file or directory (os error 2)
/// ```
pub trait Context<T, E>: private::Sealed {
    /// Wrap the error value with additional context.
    fn context<C>(self, context: C) -> Result<T, Error>
    where
        C: Display + Send + Sync + 'static;
    /// Wrap the error value with additional context that is evaluated lazily
    /// only once an error does occur.
    fn with_context<C, F>(self, f: F) -> Result<T, Error>
    where
        C: Display + Send + Sync + 'static,
        F: FnOnce() -> C;
}

Replacement in src/context.rs at line 153 [5.642]
B:BD[8.138] → [8.138:152]
```
mod private {
```
[8.138]
[4.866]
```
pub(crate) mod private {
```
Replacement in src/lib.rs at line 186 [5.11888]
∅:D[14.718] → [5.12820:12853]
B:BD[5.12820] → [5.12820:12853]
```
pub use crate::context::Context;
```
[2.127]
[15.368]
```
use std::fmt::Display;
```

Insertion in src/lib.rs at line 428 [5.11888]

[16.284]

[17.155]

}
/// Provides the `context` method for `Result`.
///
/// This trait is sealed and cannot be implemented for types outside of
/// `anyhow`.
///
/// # Example
///
/// ```
/// use anyhow::{Context, Result};
/// use std::fs;
/// use std::path::PathBuf;
///
/// pub struct ImportantThing {
///     path: PathBuf,
/// }
///
/// impl ImportantThing {
///     # const IGNORE: &'static str = stringify! {
///     pub fn detach(&mut self) -> Result<()> {...}
///     # };
///     # fn detach(&mut self) -> Result<()> {
///     #     unimplemented!()
///     # }
/// }
///
/// pub fn do_it(mut it: ImportantThing) -> Result<Vec<u8>> {
///     it.detach().context("failed to detach the important thing")?;
///
///     let path = &it.path;
///     let content = fs::read(path)
///         .with_context(|| format!("failed to read instrs from {}", path.display()))?;
///
///     Ok(content)
/// }
/// ```
///
/// When printed, the outermost context would be printed first and the lower
/// level underlying causes would be enumerated below.
///
/// ```console
/// Error: failed to read instrs from ./path/to/instrs.jsox
///
/// caused by:
///     No such file or directory (os error 2)
/// ```
pub trait Context<T, E>: context::private::Sealed {
    /// Wrap the error value with additional context.
    fn context<C>(self, context: C) -> Result<T, Error>
    where
        C: Display + Send + Sync + 'static;
    /// Wrap the error value with additional context that is evaluated lazily
    /// only once an error does occur.
    fn with_context<C, F>(self, f: F) -> Result<T, Error>
    where
        C: Display + Send + Sync + 'static,
        F: FnOnce() -> C;

Dependencies

In channels

Change contents

Replacement in src/context.rs at line 1 [5.642]

Deletion in src/context.rs at line 9 [5.642]

Replacement in src/context.rs at line 153 [5.642]

Replacement in src/lib.rs at line 186 [5.11888]

Insertion in src/lib.rs at line 428 [5.11888]