Enum VariableBinding

pub enum VariableBinding<'f> {
    Value((ValueType, Value)),
    Provider(Function<'f>),
}

Variable binding: value or provider.

VariableBinding represents a runtime variable binding, which can be:

• Value binding (Value): Directly stored variable value
• Provider binding (Provider): Dynamically computed variable value through functions

Lifetime Parameters

• 'f: Lifetime of provider functions

Variants

Value((ValueType, Value))

Directly stored value binding, containing (type, value) tuple

Provider(Function<'f>)

Dynamic provider binding, computing values through functions

Implementations

impl<'f> VariableBinding<'f>

pub fn from_value<T: IntoValue + TypedValue>(value: T) -> Self

Creates a variable binding from a value.

Type Parameters

• T: Value type, must implement IntoValue + TypedValue

Parameters

• value: The value to bind

Returns

New VariableBinding::Value containing the value and its type

pub fn from_provider<F, Fm>(provider: F) -> Self

where F: IntoFunction<'f, Fm>, Fm: FnMarker,

Creates a variable binding from a provider function.

Type Parameters

• F: Provider function type, must implement IntoFunction
• Fm: Function marker type (sync/async)

Parameters

• provider: The provider function

Returns

New VariableBinding::Provider containing the provider function

pub fn value_type(&self) -> ValueType

Returns the value type of this binding.

For value bindings, returns the stored type. For provider bindings, returns the return type of the provider function.

Returns

The ValueType of this binding

pub fn is_value(&self) -> bool

Returns whether this is a value binding.

Returns

true if this is a Value binding, false if it’s a Provider binding

pub fn is_provider(&self) -> bool

Returns whether this is a provider binding.

Returns

true if this is a Provider binding, false if it’s a Value binding

pub fn as_value(&self) -> Option<&Value>

Returns the value if this is a value binding.

Returns

Some(&Value) if this is a value binding, None if it’s a provider binding

pub fn as_provider(&self) -> Option<&Function<'f>>

Returns the provider function if this is a provider binding.

Returns

Some(&Function) if this is a provider binding, None if it’s a value binding

pub fn into_value(self) -> Option<Value>

Converts this binding into a value if it’s a value binding.

Returns

Some(Value) if this is a value binding, None if it’s a provider binding

pub fn into_provider(self) -> Option<Function<'f>>

Converts this binding into a provider function if it’s a provider binding.

Returns

Some(Function) if this is a provider binding, None if it’s a value binding

Trait Implementations

impl<'f> Clone for VariableBinding<'f>

fn clone(&self) -> VariableBinding<'f>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'f> Debug for VariableBinding<'f>

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

Formats the value using the given formatter.