Enum Value 

pub enum Value {
    Null,
    Bool(bool),
    Integer(i64),
    Float(f64),
    Text(Rc<str>),
    List(Rc<[Value]>),
    Map(Rc<IndexMap<Rc<str>, Value>>),
    PatternMatches(Rc<str>, Vec<Rc<PatternMatch>>),
    NativePatternMatch(Rc<NativePatternMatch>),
    Type(Type),
}

A Ryan value.

Variants

Null

The value null.

Bool(bool)

A boolean.

Integer(i64)

An integer.

Float(f64)

A floating point, including scarry stuff like inf and NaN.

Text(Rc<str>)

An utf-8 encoded string.

List(Rc<[Value]>)

A list of other Ryan values.

Map(Rc<IndexMap<Rc<str>, Value>>)

An association of strings to other Ryan values.

PatternMatches(Rc<str>, Vec<Rc<PatternMatch>>)

A list of pattern match rules for a given identifier.

NativePatternMatch(Rc<NativePatternMatch>)

A pattern match where the code to be executed in case of a match is native code, not a Ryan block.

Type(Type)

A Ryan type.

Implementations

impl Value

pub fn is_true(&self) -> Result<bool, String>

Tests the “truthiness” of a value. Currently, only true is true; values other than a boolean will raise an error.

pub fn matches(&self, lit: &Literal) -> bool

“Equality” between a value and a Literal. Literals are nodes in the abstract syntax tree, while values are not.

pub fn iter(&self) -> Result<ValueIter<'_>, NotIterable>

Tries to return an iterator, if the value is iterable

pub fn extract_path(&self, path: &[Value]) -> Result<Value, String>

Extracts the value lying at the end of a path in a nested Ryan value.

pub fn canonical_type(&self) -> Type

pub fn decode<T>(&self) -> Result<T, DecodeError>

where T: for<'a> Deserialize<'a>,

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl Display for Value

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

Formats the value using the given formatter.

impl FromIterator<Value> for Value

fn from_iter<T: IntoIterator<Item = Value>>(iter: T) -> Self

Creates a value from an iterator.

impl PartialEq for Value

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

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl StructuralPartialEq for Value