Enum Value 

pub enum Value<T> {
    Literal(T),
    Parameter(String),
    Expression(String),
}

Variants

Literal(T)

A literal value known at parse time

Parameter(String)

A parameter reference that will be resolved at runtime

Expression(String)

A mathematical expression that will be evaluated at runtime

Implementations

impl<T> Value<T>

where T: FromStr + Clone, T::Err: Display,

pub fn resolve(&self, params: &HashMap<String, String>) -> Result<T>

Resolve this value using the provided parameter map

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

Get the literal value if this is a literal, otherwise None

pub fn as_parameter(&self) -> Option<&str>

Get the parameter name if this is a parameter, otherwise None

pub fn as_expression(&self) -> Option<&str>

Get the expression if this is an expression, otherwise None

impl<T: Clone> Value<T>

pub fn literal(value: T) -> Self

Create a literal value

pub fn parameter(name: String) -> Self

Create a parameter reference

pub fn expression(expr: String) -> Self

Create an expression

Trait Implementations

impl<T: Clone> Clone for Value<T>

fn clone(&self) -> Value<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Value<T>

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for Value<T>

where T: Deserialize<'de> + FromStr, T::Err: Display,

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> Display for Value<T>

where T: Display,

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

Formats the value using the given formatter.

impl<T: Hash> Hash for Value<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: PartialEq> PartialEq for Value<T>

fn eq(&self, other: &Value<T>) -> 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<T> Resolve<T> for Value<T>

where T: FromStr + Clone, T::Err: Display,

fn resolve(&self, ctx: &ParameterContext) -> Result<T>

Resolve any parameters in this object using the provided context

impl<T> Serialize for Value<T>

where T: Serialize + Display,

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T> Validate for Value<T>

fn validate(&self, _ctx: &ValidationContext) -> Result<()>

Validate this object using the provided validation context

impl<T: Eq> Eq for Value<T>

impl<T> StructuralPartialEq for Value<T>