Trait scrapmetal::GenericMutate

pub trait GenericMutate<R> {
    fn mutate<T>(&mut self, t: &mut T) -> R
    where
        T: Term;
}

A similar work around as GenericTransform, but mutating in place and optionally returning some query type, rather than taking self and returning the same Self type.

This is roughly equivalent to for<T> FnMut(&mut T) -> R.

Required Methods

fn mutate<T>(&mut self, t: &mut T) -> R where
    T: Term, 

Call the query function on any T.

Implementors

• impl<M, U, D, R> GenericMutate<R> for Mutation<M, U, D, R> where
    M: FnMut(&mut U) -> R,
    D: FnMut() -> R, 
• impl<M, R, F> GenericMutate<R> for MutateEverything<M, R, F> where
    M: GenericMutate<R>,
    F: FnMut(R, R) -> R,