Derive Macro Construct 

#[derive(Construct)]
{
    // Attributes available to this derive:
    #[thiserror_ext]
    #[construct]
}

Generates constructor functions for different variants of the error type.

The arguments of the constructor functions can be any types that implement Into for the corresponding fields of the variant, enabling convenient construction of the error type.

Example

#[derive(Debug, thiserror::Error, thiserror_ext::Construct)]
enum Error {
    #[error("unsupported feature: {0}")]
    UnsupportedFeature { name: String },

    #[error("internal error: {0}")]
    #[construct(skip)] // to skip generating the constructor
    InternalError(String),
}

// Any type that implements `Into<String>` is accepted as the argument.
let _: Error = Error::unsupported_feature("foo");

New type

If a new type is specified with #[thiserror_ext(newtype(..))], the constructors will be implemented on the new type instead.

See the documentation of thiserror_ext::Box or thiserror_ext::Arc for more details.