thisctx 0.4.0

Easily create error with contexts
Documentation 
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use thisctx::IntoError;

mod error {
    use thisctx::WithContext;

    #[derive(Debug, WithContext)]
    #[thisctx(visibility = "pub(crate)")]
    // Syntax as follows is also allowed.
    // #[thisctx(visibility(pub(crate)))]
    // #[thisctx(pub(crate))]
    pub enum Error {
        #[thisctx(visibility = "pub")]
        PubVariant(#[thisctx(visibility = "pub(crate)")] i32),
        PubCrateVariant(i32),
    }
}

#[test]
fn attr_visibility() {
    error::PubVariant(0).build();
    error::PubCrateVariant(0).build();
}