Trait rustc_data_structures::unify::EqUnifyValue

source ·
pub trait EqUnifyValue: Eq + Clone + Debug { }
Expand description

A convenient helper for unification values which must be equal or else an error occurs. For example, if you are unifying types in a simple functional language, this may be appropriate, since (e.g.) you can’t unify a type variable bound to int with one bound to float (but you can unify two type variables both bound to int).

Any type which implements EqUnifyValue automatially implements UnifyValue; if the two values are equal, merging is permitted. Otherwise, the error (v1, v2) is returned, where v1 and v2 are the two unequal values.

Object Safety§

This trait is not object safe.