Struct SafeExpression 

pub struct SafeExpression<R, T> { /* private fields */ }

Implementations

impl<R, T> SafeExpression<R, T>

where R: Send + Sync + 'static, T: 'static,

pub fn new( root: R, evaluator: impl Fn(&R) -> Option<T> + Send + Sync + 'static, ) -> Self

pub fn eval(&self) -> Option<T>

pub fn eval_with(&self, root: &R) -> Option<T>

pub fn apply<U>( self, mapper: impl Fn(T) -> U + Send + Sync + 'static, ) -> SafeExpression<R, U>

where U: 'static,

pub fn apply_optional<U>( self, mapper: impl Fn(T) -> Option<U> + Send + Sync + 'static, ) -> SafeExpression<R, U>

where U: 'static,

pub fn or_else(&self, default_value: T) -> T

pub fn or_else_with(&self, default_value: impl FnOnce() -> T) -> T

pub fn or_else_throw<E>(&self, error: impl FnOnce() -> E) -> Result<T, E>

pub fn is_null(&self) -> bool

pub fn is_not_null(&self) -> bool

pub fn is_empty(&self) -> bool

where T: TeaqlEmpty,

pub fn is_not_empty(&self) -> bool

where T: TeaqlEmpty,

pub fn when_is_null(&self, function: impl FnOnce())

pub fn when_is_not_null(&self, consumer: impl FnOnce(T))

pub fn when_is_empty(&self, function: impl FnOnce())

where T: TeaqlEmpty,

pub fn when_not_empty(&self, consumer: impl FnOnce(T))

where T: TeaqlEmpty,

impl<R> SafeExpression<R, R>

where R: Clone + Send + Sync + 'static,

pub fn value(root: R) -> Self

pub fn root(&self) -> &R

impl<R, E> SafeExpression<R, E>

where R: Send + Sync + 'static, E: BaseEntity + Clone + 'static,

pub fn entity_id(self) -> SafeExpression<R, u64>

pub fn entity_version(self) -> SafeExpression<R, i64>

pub fn update_entity_id(self, id: u64) -> SafeExpression<R, E>

impl<R, T> SafeExpression<R, SmartList<T>>

where R: Send + Sync + 'static, T: Clone + 'static,

pub fn size(self) -> SafeExpression<R, usize>

pub fn first(self) -> SafeExpression<R, T>

pub fn get(self, index: usize) -> SafeExpression<R, T>

Trait Implementations

impl<R: Clone, T: Clone> Clone for SafeExpression<R, T>

fn clone(&self) -> SafeExpression<R, T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.