string_error_wrap

Crate to simplify making error types wrapping String

Useful when a library uses String errors but your app uses something like anyhow.

To use the crate add the crate to the project using cargo (either manually in Cargo.toml or using cargo add string_error_wrap)

Then you can define a new String-wrapping error type like this (replacing Name with what you want the name of the type to be):

string_error_wrap::wrapper_gen!(Name);

This type implements Error, Debug, Clone and From<String>.

It is intended to be used using Result::map_err(YourError::from), which will convert any errors from a String to this type, but may of course also be used in other ways.

lib.rs:

string_error_wrap

Crate for easily creating error types wrapping String.

This can be extremely useful for dealing with libraries using String as an error type in some functions when you use something like anyhow.

Usage

// generates error type
string_error_wrap::wrapper!(SomeError);

fn main() -> Result<(), SomeError> {
    // other_function returns a Result<T, String>
    // but that can be converted into Result<T, SomeError>
    // allowing the use of ?
    other_function().map_err(SomeError::from)?;
}