ResultExt

error_stack

Trait ResultExt 

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pub trait ResultExt {
    type Context: ?Sized;
    type Ok;

    // Required methods
    fn attach<A>(self, attachment: A) -> Result<Self::Ok, Report<Self::Context>>
       where A: Attachment;
    fn attach_with<A, F>(
        self,
        attachment: F,
    ) -> Result<Self::Ok, Report<Self::Context>>
       where A: Attachment,
             F: FnOnce() -> A;
    fn attach_lazy<A, F>(
        self,
        attachment: F,
    ) -> Result<Self::Ok, Report<Self::Context>>
       where A: OpaqueAttachment,
             F: FnOnce() -> A;
    fn attach_opaque<A>(
        self,
        attachment: A,
    ) -> Result<Self::Ok, Report<Self::Context>>
       where A: OpaqueAttachment;
    fn attach_opaque_with<A, F>(
        self,
        attachment: F,
    ) -> Result<Self::Ok, Report<Self::Context>>
       where A: OpaqueAttachment,
             F: FnOnce() -> A;
    fn attach_printable<A>(
        self,
        attachment: A,
    ) -> Result<Self::Ok, Report<Self::Context>>
       where A: Attachment;
    fn attach_printable_lazy<A, F>(
        self,
        attachment: F,
    ) -> Result<Self::Ok, Report<Self::Context>>
       where A: Attachment,
             F: FnOnce() -> A;
    fn change_context<C>(self, context: C) -> Result<Self::Ok, Report<C>>
       where C: Context;
    fn change_context_lazy<C, F>(
        self,
        context: F,
    ) -> Result<Self::Ok, Report<C>>
       where C: Context,
             F: FnOnce() -> C;
}
Expand description

Extension trait for Result to provide context information on Reports.

Required Associated Types§

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type Context: ?Sized

The Context type of the Result.

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type Ok

Type of the Ok value in the Result

Required Methods§

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fn attach<A>(self, attachment: A) -> Result<Self::Ok, Report<Self::Context>>
where A: Attachment,

Adds a new printable attachment to the Report inside the Result.

Applies Report::attach on the Err variant, refer to it for more information.

Source

fn attach_with<A, F>( self, attachment: F, ) -> Result<Self::Ok, Report<Self::Context>>
where A: Attachment, F: FnOnce() -> A,

Lazily adds a new printable attachment to the Report inside the Result.

Applies Report::attach on the Err variant, refer to it for more information.

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fn attach_lazy<A, F>( self, attachment: F, ) -> Result<Self::Ok, Report<Self::Context>>
where A: OpaqueAttachment, F: FnOnce() -> A,

👎Deprecated since 0.6.0: Use attach_opaque_with instead. attach_lazy was renamed to attach_opaque_with and attach_printable_lazy was renamed to attach_with
Source

fn attach_opaque<A>( self, attachment: A, ) -> Result<Self::Ok, Report<Self::Context>>
where A: OpaqueAttachment,

Adds a new attachment to the Report inside the Result.

Applies Report::attach_opaque on the Err variant, refer to it for more information.

Source

fn attach_opaque_with<A, F>( self, attachment: F, ) -> Result<Self::Ok, Report<Self::Context>>
where A: OpaqueAttachment, F: FnOnce() -> A,

Lazily adds a new attachment to the Report inside the Result.

Applies Report::attach_opaque on the Err variant, refer to it for more information.

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fn attach_printable<A>( self, attachment: A, ) -> Result<Self::Ok, Report<Self::Context>>
where A: Attachment,

👎Deprecated since 0.6.0: Use attach instead. attach was renamed to attach_opaque and attach_printable was renamed to attach
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fn attach_printable_lazy<A, F>( self, attachment: F, ) -> Result<Self::Ok, Report<Self::Context>>
where A: Attachment, F: FnOnce() -> A,

👎Deprecated since 0.6.0: Use attach_with instead. attach_lazy was renamed to attach_opaque_with and attach_printable_lazy was renamed to attach_with
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fn change_context<C>(self, context: C) -> Result<Self::Ok, Report<C>>
where C: Context,

Changes the context of the Report inside the Result.

Applies Report::change_context on the Err variant, refer to it for more information.

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fn change_context_lazy<C, F>(self, context: F) -> Result<Self::Ok, Report<C>>
where C: Context, F: FnOnce() -> C,

Lazily changes the context of the Report inside the Result.

Applies Report::change_context on the Err variant, refer to it for more information.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types§

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impl<T, E> ResultExt for Result<T, E>
where E: IntoReport,

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type Context = <E as IntoReport>::Context

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type Ok = T

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fn attach<A>(self, attachment: A) -> Result<T, Report<E::Context>>
where A: Attachment,

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fn attach_with<A, F>(self, attachment: F) -> Result<T, Report<E::Context>>
where A: Attachment, F: FnOnce() -> A,

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fn attach_lazy<A, F>(self, attachment: F) -> Result<T, Report<E::Context>>
where A: OpaqueAttachment, F: FnOnce() -> A,

👎Deprecated since 0.6.0: Use attach_opaque_with instead. attach_lazy was renamed to attach_opaque_with and attach_printable_lazy was renamed to attach_with
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fn attach_opaque<A>(self, attachment: A) -> Result<T, Report<E::Context>>
where A: OpaqueAttachment,

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fn attach_opaque_with<A, F>( self, attachment: F, ) -> Result<T, Report<E::Context>>
where A: OpaqueAttachment, F: FnOnce() -> A,

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fn attach_printable<A>(self, attachment: A) -> Result<T, Report<E::Context>>
where A: Attachment,

👎Deprecated since 0.6.0: Use attach instead. attach was renamed to attach_opaque and attach_printable was renamed to attach
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fn attach_printable_lazy<A, F>( self, attachment: F, ) -> Result<T, Report<E::Context>>
where A: Attachment, F: FnOnce() -> A,

👎Deprecated since 0.6.0: Use attach_with instead. attach_lazy was renamed to attach_opaque_with and attach_printable_lazy was renamed to attach_with
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fn change_context<C>(self, context: C) -> Result<T, Report<C>>
where C: Context,

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fn change_context_lazy<C, F>(self, context: F) -> Result<T, Report<C>>
where C: Context, F: FnOnce() -> C,

Implementors§