Trait exonum_leveldb::database::comparator::Comparator

pub trait Comparator {
    fn name(&self) -> *const c_char;
    fn compare(&self, a: &[u8], b: &[u8]) -> Ordering;

    fn null() -> bool { ... }
}

A comparator has two important functions:

• the name function returns a fixed name to detect errors when opening databases with a different name
• The comparison implementation

Required Methods

fn name(&self) -> *const c_char

Return the name of the Comparator

fn compare(&self, a: &[u8], b: &[u8]) -> Ordering

compare two keys. This must implement a total ordering.

Provided Methods

fn null() -> bool

whether the comparator is the DefaultComparator

Implementors

• impl Comparator for OrdComparator