Struct Predicate 

pub struct Predicate { /* private fields */ }

Implementations

impl Predicate

pub fn new_unchecked(inner: Vec<Expr>) -> Self

Trait Implementations

impl Clone for Predicate

fn clone(&self) -> Predicate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Predicate

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

Formats the value using the given formatter.

impl Display for Predicate

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

Formats the value using the given formatter.

impl Expression for Predicate

fn resolve(&self, ctx: &mut Context<'_>) -> Resolved

Resolve an expression to a concrete Value.

fn type_info(&self, state: &TypeState) -> TypeInfo

Calculates the type state after an expression resolves, including the expression result itself. This must be called with the initial TypeState.

fn resolve_constant(&self, _state: &TypeState) -> Option<Value>

Resolve an expression to a value without any context, if possible. This attempts to resolve expressions using only compile-time information.

fn type_def(&self, state: &TypeState) -> TypeDef

Resolve an expression to its TypeDef type definition. This must be called with the initial TypeState.

fn apply_type_info(&self, state: &mut TypeState) -> TypeDef

Applies state changes from the expression to the given state, and returns the result type.

fn format(&self) -> Option<String>

Format the expression into a consistent style.

impl PartialEq for Predicate

fn eq(&self, other: &Predicate) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Predicate