Struct CollationRegistry 

pub struct CollationRegistry { /* private fields */ }

Registry for collation functions, keyed by case-insensitive name.

Pre-populated with the three built-in collations: BINARY, NOCASE, RTRIM. Custom collations can be registered via CollationRegistry::register.

Implementations

impl CollationRegistry

pub fn new() -> Self

Create a new registry pre-populated with BINARY, NOCASE, and RTRIM.

pub fn register<C: CollationFunction + 'static>( &mut self, collation: C, ) -> Option<Arc<dyn CollationFunction>>

Register a custom collation. Returns the previous collation with the same name if one existed (overwrites).

Collation names are case-insensitive.

pub fn find(&self, name: &str) -> Option<Arc<dyn CollationFunction>>

Look up a collation by name (case-insensitive).

Returns None if no collation with the given name is registered.

pub fn contains(&self, name: &str) -> bool

Check whether a collation with the given name is registered.

Trait Implementations

impl Default for CollationRegistry

fn default() -> Self

Returns the “default value” for a type.