Enum WhereExpr 

pub enum WhereExpr {
    And(Box<WhereExpr>, Box<WhereExpr>),
    Or(Box<WhereExpr>, Box<WhereExpr>),
    Condition(Condition),
    True,
}

A WHERE expression tree supporting AND, OR, and leaf conditions.

Variants

And(Box<WhereExpr>, Box<WhereExpr>)

AND of two sub-expressions.

Or(Box<WhereExpr>, Box<WhereExpr>)

OR of two sub-expressions.

Condition(Condition)

A single scalar condition.

True

Always-true — used when there is no WHERE clause.

Implementations

impl WhereExpr

pub fn conditions(&self) -> impl Iterator<Item = &Condition>

Iterate all leaf conditions in the expression tree (depth-first).

pub fn for_each_condition_mut(&mut self, f: &mut impl FnMut(&mut Condition))

Mutable walk — applies f to every leaf condition.

pub fn is_true(&self) -> bool

Return true when the expression has no conditions (is always-true).

Trait Implementations

impl Clone for WhereExpr

fn clone(&self) -> WhereExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WhereExpr

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

Formats the value using the given formatter.