Enum ketos::value::Value
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[src]
pub enum Value {
Unit,
Unbound,
Bool(bool),
Float(f64),
Integer(Integer),
Ratio(Ratio),
Struct(Rc<Struct>),
StructDef(Rc<StructDef>),
Name(Name),
Keyword(Name),
Char(char),
String(String),
Quasiquote(Box<Value>, u32),
Comma(Box<Value>, u32),
CommaAt(Box<Value>, u32),
Quote(Box<Value>, u32),
List(RcVec<Value>),
Function(Function),
Lambda(Lambda),
Foreign(Rc<ForeignValue>),
}Represents a value.
Variants
Unit()
UnboundPlaceholder for missing optional values; should not be used to represent any real value.
Bool(bool)Boolean -- true or false
Float(f64)Floating point number
Integer(Integer)Signed arbitrary precision integer
Ratio(Ratio)Arbitrary precision ratio
Struct(Rc<Struct>)Struct value
StructDef(Rc<StructDef>)Struct definition
Name(Name)Literal name
Keyword(Name)Keyword
Char(char)Character
String(String)String
Quasiquote(Box<Value>, u32)Quasiquoted value; quote depth MUST NEVER be zero.
Comma(Box<Value>, u32)Comma'd value; comma depth MUST NEVER be zero.
CommaAt(Box<Value>, u32)Comma-at'd value; quote depth MUST NEVER be zero.
Quote(Box<Value>, u32)Quoted value; quote depth MUST NEVER be zero.
List(RcVec<Value>)Series of one or more values.
MUST NEVER be of length zero. Use Unit to represent empty lists.
Function(Function)Function implemented in Rust
Lambda(Lambda)Compiled bytecode function
Foreign(Rc<ForeignValue>)Boxed value of a foreign type
Methods
impl Value[src]
fn new_foreign<T: ForeignValue>(t: T) -> Value
Returns a value of a foreign type.
fn new_foreign_fn<F>(name: Name, f: F) -> Value where F: Any + Fn(&Scope, &mut [Value]) -> Result<Value, Error>
Returns a value containing a foreign function.
fn compare(&self, rhs: &Value) -> Result<Ordering, ExecError>
Compares two values; returns an error if the values cannot be compared.
fn is_equal(&self, rhs: &Value) -> Result<bool, ExecError>
Tests two values for equality; returns an error if the values cannot be compared.
fn is_identical(&self, rhs: &Value) -> bool
Returns whether this value is identical to another.
The notable difference between this and eq is that float NaN values
will compare equal.
fn take(&mut self) -> Value
Replaces the value with Unit and returns the old value.
fn quasiquote(self, n: u32) -> Value
Returns the value, quasi-quoted.
fn comma(self, n: u32) -> Value
Returns the value, comma'd.
fn comma_at(self, n: u32) -> Value
Returns the value, comma-at'd.
fn quote(self, n: u32) -> Value
Returns the value, quoted.
fn type_name(&self) -> &'static str
Returns a string describing the type of the value.
Trait Implementations
impl Debug for Value[src]
impl Clone for Value[src]
fn clone(&self) -> Value
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0
Performs copy-assignment from source. Read more
impl NameDebug for Value[src]
fn fmt(&self, names: &NameStore, f: &mut Formatter) -> Result
Writes the value's debug representation to the formatter stream.
impl NameDisplay for Value[src]
fn fmt(&self, names: &NameStore, f: &mut Formatter) -> Result
Writes the value's display representation to the formatter stream.
impl<'a> FromValueRef<'a> for &'a Value[src]
fn from_value_ref(v: &'a Value) -> Result<&'a Value, ExecError>
Returns the borrowed value
impl FromValue for Value[src]
fn from_value(v: Value) -> Result<Value, ExecError>
Consumes the Value and returns a Rust value