Struct ConstValue

pub struct ConstValue { /* private fields */ }

A constant value.

Implementations

impl ConstValue

pub fn tuple(values: Box<[ConstValue]>) -> ConstValue

Construct a new tuple constant value.

pub fn for_struct<const N: usize>( hash: Hash, fields: [ConstValue; N], ) -> Result<ConstValue, RuntimeError>

Construct a constant value for a struct.

pub fn as_integer<T>(&self) -> Result<T, RuntimeError>

where T: TryFrom<i64> + TryFrom<u64>,

Try to coerce the current value as the specified integer T.

Examples

let value = rune::to_const_value(u32::MAX)?;

assert_eq!(value.as_integer::<u64>()?, u32::MAX as u64);
assert!(value.as_integer::<i32>().is_err());

pub fn as_ordering(&self) -> Result<Ordering, RuntimeError>

Coerce into Ordering.

This gets a copy of the value.

pub fn as_ordering_mut(&mut self) -> Result<&mut Ordering, RuntimeError>

Coerce into Ordering.

This gets the value by mutable reference.

pub fn as_bool(&self) -> Result<bool, RuntimeError>

Coerce into bool.

This gets a copy of the value.

pub fn as_bool_mut(&mut self) -> Result<&mut bool, RuntimeError>

Coerce into bool.

This gets the value by mutable reference.

pub fn as_char(&self) -> Result<char, RuntimeError>

Coerce into char.

This gets a copy of the value.

pub fn as_char_mut(&mut self) -> Result<&mut char, RuntimeError>

Coerce into char.

This gets the value by mutable reference.

pub fn as_unsigned(&self) -> Result<u64, RuntimeError>

Coerce into u64 unsigned integer.

This gets a copy of the value.

pub fn as_unsigned_mut(&mut self) -> Result<&mut u64, RuntimeError>

Coerce into u64 unsigned integer.

This gets the value by mutable reference.

pub fn as_signed(&self) -> Result<i64, RuntimeError>

Coerce into i64 signed integer.

This gets a copy of the value.

pub fn as_signed_mut(&mut self) -> Result<&mut i64, RuntimeError>

Coerce into i64 signed integer.

This gets the value by mutable reference.

pub fn as_float(&self) -> Result<f64, RuntimeError>

Coerce into f64 float.

This gets a copy of the value.

pub fn as_float_mut(&mut self) -> Result<&mut f64, RuntimeError>

Coerce into f64 float.

This gets the value by mutable reference.

pub fn as_type(&self) -> Result<Type, RuntimeError>

Coerce into Type.

This gets a copy of the value.

pub fn as_type_mut(&mut self) -> Result<&mut Type, RuntimeError>

Coerce into Type.

This gets the value by mutable reference.

pub fn into_tuple(self) -> Result<Box<[ConstValue]>, RuntimeError>

Coerce into tuple.

Trait Implementations

impl Debug for ConstValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ConstValue

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Bytes> for ConstValue

fn from(value: Bytes) -> Self

Converts to this type from the input type.

impl From<Inline> for ConstValue

fn from(value: Inline) -> Self

Converts to this type from the input type.

impl From<Ordering> for ConstValue

fn from(value: Ordering) -> Self

Converts to this type from the input type.

impl From<String> for ConstValue

fn from(value: String) -> Self

Converts to this type from the input type.

impl From<Type> for ConstValue

fn from(value: Type) -> Self

Converts to this type from the input type.

impl From<bool> for ConstValue

fn from(value: bool) -> Self

Converts to this type from the input type.

impl From<char> for ConstValue

fn from(value: char) -> Self

Converts to this type from the input type.

impl From<f32> for ConstValue

fn from(value: f32) -> ConstValue

Converts to this type from the input type.

impl From<f64> for ConstValue

fn from(value: f64) -> Self

Converts to this type from the input type.

impl From<i16> for ConstValue

fn from(number: i16) -> Self

Converts to this type from the input type.

impl From<i32> for ConstValue

fn from(number: i32) -> Self

Converts to this type from the input type.

impl From<i64> for ConstValue

fn from(value: i64) -> Self

Converts to this type from the input type.

impl From<i8> for ConstValue

fn from(number: i8) -> Self

Converts to this type from the input type.

impl From<u16> for ConstValue

fn from(number: u16) -> Self

Converts to this type from the input type.

impl From<u32> for ConstValue

fn from(number: u32) -> Self

Converts to this type from the input type.

impl From<u64> for ConstValue

fn from(value: u64) -> Self

Converts to this type from the input type.

impl From<u8> for ConstValue

fn from(number: u8) -> Self

Converts to this type from the input type.

impl FromConstValue for ConstValue

fn from_const_value(value: ConstValue) -> Result<Self, RuntimeError>

Convert from a constant value.

impl FromValue for ConstValue

fn from_value(value: Value) -> Result<Self, RuntimeError>

Try to convert to the given type, from the given value.

impl Serialize for ConstValue

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToConstValue for ConstValue

fn to_const_value(self) -> Result<ConstValue, RuntimeError>

Convert into a constant value.

fn construct() -> Option<Arc<dyn ConstConstruct>>

Return the constant constructor for the given type.

impl ToValue for ConstValue

fn to_value(self) -> Result<Value, RuntimeError>

Convert into a value.

impl TryClone for ConstValue

fn try_clone(&self) -> Result<Self>

Try to clone the current value, raising an allocation error if it’s unsuccessful.

fn try_clone_from(&mut self, source: &Self) -> Result<(), Error>

Performs copy-assignment from source.

impl TryFrom<&[u8]> for ConstValue

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &[u8]) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<&str> for ConstValue

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<i128> for ConstValue

type Error = RuntimeError

The type returned in the event of a conversion error.

fn try_from(value: i128) -> Result<Self, RuntimeError>

Performs the conversion.

impl TryFrom<isize> for ConstValue

type Error = RuntimeError

The type returned in the event of a conversion error.

fn try_from(value: isize) -> Result<Self, RuntimeError>

Performs the conversion.

impl TryFrom<u128> for ConstValue

type Error = RuntimeError

The type returned in the event of a conversion error.

fn try_from(value: u128) -> Result<Self, RuntimeError>

Performs the conversion.

impl TryFrom<usize> for ConstValue

type Error = RuntimeError

The type returned in the event of a conversion error.

fn try_from(value: usize) -> Result<Self, RuntimeError>

Performs the conversion.