displaydoc 0.1.7

A derive macro for implementing the display Trait via a doc comment and string interpolation
derive(Display) /// `From<docs>`

[![Latest Version](https://img.shields.io/crates/v/displaydoc.svg)](https://crates.io/crates/displaydoc)
[![Rust Documentation](https://img.shields.io/badge/api-rustdoc-blue.svg)](https://docs.rs/displaydoc)

This library provides a convenient derive macro for the standard library's
[`core::fmt::Display`] trait.

[`core::fmt::Display`]: https://doc.rust-lang.org/std/fmt/trait.Display.html

displaydoc = "0.1"

*Compiler support: requires rustc 1.31+*


## Example

use displaydoc::Display;
use thiserror::Error;

#[derive(Display, Error, Debug)]
pub enum DataStoreError {
    /// data store disconnected
    Disconnect(#[source] io::Error),
    /// the data for key `{0}` is not available
    /// invalid header (expected {expected:?}, found {found:?})
    InvalidHeader {
        expected: String,
        found: String,
    /// unknown data store error


## Details

- A `Display` impl is generated for your type if you provide doc comment
  messages on the struct or each variant of your enum, as shown above in the

  The messages support a shorthand for interpolating fields from the error.

    - `/// {var}``write!("{}", self.var)`
    - `/// {0}``write!("{}", self.0)`
    - `/// {var:?}``write!("{:?}", self.var)`
    - `/// {0:?}``write!("{:?}", self.0)`


## FAQ

1. **Is this crate `no_std` compatible?**
    * Yes! This crate implements the `core::fmt::Display` trait not the `std::fmt::Display` trait so it should work in `std` and `no_std` environments. Just add `default-features = false`.

2. **Does this crate work with `Path` and `PathBuf` via the `Display` trait?**
    * Yuuup. This crate uses @dtolnay's [autoref specialization technique]https://github.com/dtolnay/case-studies/blob/master/autoref-specialization/README.md to add a special trait for types to get the display impl, it then specializes for `Path` and `PathBuf` and when either of these types are found it calls `self.display()` to get a `std::path::Display<'_>` type which can be used with the Display format specifier!


#### License

Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.