Interface Operator

src/sql/parser/mod.rs:582–591

An operator trait, to help with parsing of operators

/// An operator trait, to help with parsing of operators
trait Operator: Sized {
    /// Looks up the corresponding operator for a token, if one exists
    fn from(token: &Token) -> Option<Self>;
    /// Augments an operator by allowing it to parse any modifiers.
    fn augment(self, parser: &mut Parser) -> Result<Self>;
    /// Returns the operator's associativity
    fn assoc(&self) -> u8;
    /// Returns the operator's precedence
    fn prec(&self) -> u8;
}

const ASSOC_LEFT: u8 = 1;
const ASSOC_RIGHT: u8 = 0;