<br>
## No-std support
In no_std mode, the same API is almost all available and works the same way. To
depend on Anyhow in no_std mode, disable our default enabled "std" feature in
Cargo.toml. A global allocator is required.
```toml
[dependencies]
anyhow = { version = "1.0", default-features = false }
```

Since the `?`-based error conversions would normally rely on the
`std::error::Error` trait which is only available through std, no_std mode will
require an explicit `.map_err(Error::msg)` when working with a non-Anyhow error
type inside a function that returns Anyhow's error type.

//!
//! <br>
//!
//! # No-std support
//!
//! In no_std mode, the same API is almost all available and works the same way.
//! To depend on Anyhow in no_std mode, disable our default enabled "std"
//! feature in Cargo.toml. A global allocator is required.
//!
//! ```toml
//! [dependencies]
//! anyhow = { version = "1.0", default-features = false }
//! ```
//!
//! Since the `?`-based error conversions would normally rely on the
//! `std::error::Error` trait which is only available through std, no_std mode
//! will require an explicit `.map_err(Error::msg)` when working with a
//! non-Anyhow error type inside a function that returns Anyhow's error type.