Trait rustc_errors::diagnostic::EmissionGuarantee

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pub trait EmissionGuarantee: Sized {
    type EmitResult = Self;

    // Required method
    fn emit_producing_guarantee(diag: Diag<'_, Self>) -> Self::EmitResult;
}

Expand description

Trait for types that Diag::emit can return as a “guarantee” (or “proof”) token that the emission happened.

Provided Associated Types§

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type EmitResult = Self

This exists so that bugs and fatal errors can both result in ! (an abort) when emitted, but have different aborting behaviour.

Required Methods§

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fn emit_producing_guarantee(diag: Diag<'_, Self>) -> Self::EmitResult

Implementation of Diag::emit, fully controlled by each impl of EmissionGuarantee, to make it impossible to create a value of Self::EmitResult without actually performing the emission.