Struct Refusal 

pub struct Refusal {
    pub rule: &'static str,
    pub at: OpId,
    pub kept: OpId,
    pub why: String,
}

One rewrite that matched a shape and was refused, with the condition that refused it.

Printed by beck explain query, because “this could have fused and here is what stopped it” is the sentence a developer can act on — usually by moving where the program reads the session.

Fields

rule: &'static str

at: OpId

The consumer, in the fused plan’s numbering.

kept: OpId

The producer that stayed.

why: String

Trait Implementations

impl Clone for Refusal

fn clone(&self) -> Refusal

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Refusal

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.