Error code E0326

An implementation of a trait doesn't match the type constraint.

Erroneous code example:

#![allow(unused)] fn main() { trait Foo { const BAR: bool; } struct Bar; impl Foo for Bar { const BAR: u32 = 5; // error, expected bool, found u32 } }

The types of any associated constants in a trait implementation must match the types in the trait definition.