Enum evalexpr::Value

pub enum Value {
    String(String),
    Float(FloatType),
    Int(IntType),
    Boolean(bool),
    Tuple(TupleType),
    Empty,
}

The value type used by the parser. Values can be of different subtypes that are the variants of this enum.

Variants

String(String)

A string value.

Float(FloatType)

A float value.

Int(IntType)

An integer value.

Boolean(bool)

A boolean value.

Tuple(TupleType)

A tuple value.

Empty

An empty value.

Implementations

impl Value

pub fn is_string(&self) -> bool

Returns true if self is a Value::String.

pub fn is_int(&self) -> bool

Returns true if self is a Value::Int.

pub fn is_float(&self) -> bool

Returns true if self is a Value::Float.

pub fn is_number(&self) -> bool

Returns true if self is a Value::Int or Value::Float.

pub fn is_boolean(&self) -> bool

Returns true if self is a Value::Boolean.

pub fn is_tuple(&self) -> bool

Returns true if self is a Value::Tuple.

pub fn is_empty(&self) -> bool

Returns true if self is a Value::Empty.

pub fn as_string(&self) -> EvalexprResult<String>

Clones the value stored in self as String, or returns Err if self is not a Value::String.

pub fn as_int(&self) -> EvalexprResult<IntType>

Clones the value stored in self as IntType, or returns Err if self is not a Value::Int.

pub fn as_float(&self) -> EvalexprResult<FloatType>

Clones the value stored in self as FloatType, or returns Err if self is not a Value::Float.

pub fn as_number(&self) -> EvalexprResult<FloatType>

Clones the value stored in self as FloatType, or returns Err if self is not a Value::Float or Value::Int. Note that this method silently converts IntType to FloatType, if self is a Value::Int.

pub fn as_boolean(&self) -> EvalexprResult<bool>

Clones the value stored in self as bool, or returns Err if self is not a Value::Boolean.

pub fn as_tuple(&self) -> EvalexprResult<TupleType>

Clones the value stored in self as TupleType, or returns Err if self is not a Value::Tuple.

pub fn as_fixed_len_tuple(&self, len: usize) -> EvalexprResult<TupleType>

Clones the value stored in self as TupleType or returns Err if self is not a Value::Tuple of the required length.

pub fn as_empty(&self) -> EvalexprResult<()>

Returns (), or returnsErr if self is not a Value::Tuple.

Trait Implementations

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 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<(), Error>

Formats the value using the given formatter.

impl From<&&mut Value> for ValueType

fn from(value: &&mut Value) -> Self

Converts to this type from the input type.

impl From<&Value> for ValueType

fn from(value: &Value) -> Self

Converts to this type from the input type.

impl From<&mut Value> for ValueType

fn from(value: &mut Value) -> Self

Converts to this type from the input type.

impl From<&str> for Value

fn from(string: &str) -> Self

Converts to this type from the input type.

impl From<()> for Value

fn from(_: ()) -> Self

Converts to this type from the input type.

impl From<String> for Value

fn from(string: String) -> Self

Converts to this type from the input type.

impl From<Value> for EvalexprResult<Value>

fn from(value: Value) -> Self

Converts to this type from the input type.

impl From<Vec<Value, Global>> for Value

fn from(tuple: TupleType) -> Self

Converts to this type from the input type.

impl From<bool> for Value

fn from(boolean: bool) -> Self

Converts to this type from the input type.

impl From<f64> for Value

fn from(float: FloatType) -> Self

Converts to this type from the input type.

impl From<i64> for Value

fn from(int: IntType) -> Self

Converts to this type from the input type.

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: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<Value> for ()

type Error = EvalexprError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for FloatType

type Error = EvalexprError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for IntType

type Error = EvalexprError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for String

type Error = EvalexprError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for TupleType

type Error = EvalexprError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for bool

type Error = EvalexprError

The type returned in the event of a conversion error.

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

Performs the conversion.

impl StructuralPartialEq for Value