Enum Expr 

pub enum Expr<'a, F> {
    And(Vec<Expr<'a, F>>),
    Or(Vec<Expr<'a, F>>),
    Not(Box<Expr<'a, F>>),
    Pred(Filter<'a, F>),
    Compare {
        left: ScalarExpr<F>,
        op: CompareOp,
        right: ScalarExpr<F>,
    },
}

Logical expression over predicates.

Variants

And(Vec<Expr<'a, F>>)

Or(Vec<Expr<'a, F>>)

Not(Box<Expr<'a, F>>)

Pred(Filter<'a, F>)

Compare

Fields

left: ScalarExpr<F>

op: CompareOp

right: ScalarExpr<F>

Implementations

impl<'a, F> Expr<'a, F>

pub fn all_of(fs: Vec<Filter<'a, F>>) -> Expr<'a, F>

Build an AND of filters.

pub fn any_of(fs: Vec<Filter<'a, F>>) -> Expr<'a, F>

Build an OR of filters.

pub fn not(e: Expr<'a, F>) -> Expr<'a, F>

Wrap an expression in a logical NOT.

Trait Implementations

impl<'a, F> Clone for Expr<'a, F>

where F: Clone,

fn clone(&self) -> Expr<'a, F>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, F> Debug for Expr<'a, F>

where F: Debug,

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

Formats the value using the given formatter.