Enum piske::value::Value

pub enum Value {
    String(String),
    Float(f64),
    Int(i64),
    Boolean(bool),
    Complex(f64, f64),
    Set(Box<ValueSet>),
    Return(Box<Value>),
    Break(Box<Value>),
    Empty,
}

Value type for run-time memory values.

Variants

String(String)

Storage for string value

Float(f64)

Storage for floating point number value

Int(i64)

Storage for integer number value

Boolean(bool)

Storage for a boolean,

Complex(f64, f64)

Storage for a complex number,

Set(Box<ValueSet>)

Storage for a set

Return(Box<Value>)

Indication of a value returned from a function

Break(Box<Value>)

Indication of a value resulting from a break in a loop

Empty

Indication of empty / null value

Methods

impl Value

pub fn has_same_type(&self, other: &Value) -> bool

Returns true if the associated type for this value is the same type as the associated type of the other value. Returns false otherwise.

Trait Implementations

impl PartialOrd<Value> for Value

fn partial_cmp(&self, other: &Value) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

#[must_use]

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

This method tests less than (for self and other) and is used by the < operator.

#[must_use]

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

#[must_use]

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

This method tests greater than (for self and other) and is used by the > operator.

#[must_use]

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq<Value> for Value

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl From<Literal> for Value

fn from(lit: Literal) -> Value

Performs the conversion.

impl<'a> From<&'a Value> for PType

fn from(v: &'a Value) -> PType

Performs the conversion.

impl Display for Value

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

Formats the value using the given formatter.

impl Debug for Value

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

Formats the value using the given formatter.

impl<'a> Add<&'a Value> for &'a Value

type Output = Value

The resulting type after applying the + operator.

fn add(self, rhs: &Value) -> Value

Performs the + operation.

impl MemoryStore<Value> for Annotation

fn set(
    &mut self,
    ident: Identifier,
    value: Value
) -> Result<Option<Value>, String>

Sets (or updates) the value in memory for an identifier. Returns the previous value (if exists). Typically, the identifier should already exist in the store, but may not have an existing value.

fn get(&self, ident: &Identifier) -> Option<Value>

Retrieves the value for a particular identifier, if exists.

impl Value for Value

impl Coerce<PType> for Value

fn coerce(self, dest_ty: Option<PType>) -> Value

Coerce a value to target type, depending on the value of the option.

impl Cast<PType> for Value

fn cast(self, dest_ty: PType) -> Value

Cast a value to the target type (should return unchanged value if case is not possible).

impl Extract<u64> for Value

fn extract(&self) -> Result<u64, String>

Extract the value, returning an Err if the Value is of the wrong variant.

impl Extract<usize> for Value

fn extract(&self) -> Result<usize, String>

Extract the value, returning an Err if the Value is of the wrong variant.

impl Extract<i64> for Value

fn extract(&self) -> Result<i64, String>

Extract the value, returning an Err if the Value is of the wrong variant.

impl Extract<String> for Value

fn extract(&self) -> Result<String, String>

Extract the value, returning an Err if the Value is of the wrong variant.

impl Extract<f64> for Value

fn extract(&self) -> Result<f64, String>

Extract the value, returning an Err if the Value is of the wrong variant.

impl Extract<Complex> for Value

fn extract(&self) -> Result<Complex, String>

Extract the value, returning an Err if the Value is of the wrong variant.

impl BinaryOperator<PType, Value> for InfixOp

fn op(&self, ty: PType, left: &Value, right: &Value) -> Result<Value, String>

Performs the operation with operands left and right, with output type ty.

impl UnaryOperator<PType, Value> for PrefixOp

fn op(&self, ty: PType, operand: &Value) -> Result<Value, String>

Performs the oepration with the operand operand, with outpu type ty.type

impl UnaryOperator<PType, Value> for PostfixOp

fn op(&self, ty: PType, operand: &Value) -> Result<Value, String>

Performs the oepration with the operand operand, with outpu type ty.type