Enum agnes::field::Value

pub enum Value<T> {
    Na,
    Exists(T),
}

(Possibly missing) data value container.

Variants

Na

Indicates a missing (NA) value.

Exists(T)

Indicates an existing value.

Methods

impl<T> Value<T>

pub fn unwrap(self) -> T

Unwrap a Value, revealing the data contained within. Panics if called on an Na value.

pub fn exists(&self) -> bool

Test if a Value contains a value.

pub fn is_na(&self) -> bool

Test if a Value is NA.

pub fn as_ref(&self) -> Value<&T>

Returns a Value which contains a reference to the original underlying datum.

pub fn map<U, F: FnMut(T) -> U>(self, f: F) -> Value<U>

Applies function f if this Value exists.

impl<'a, T: Clone> Value<&'a T>

pub fn cloned(self) -> Value<T>

Create a owner Value out of a reference-holding Value using clone().

Trait Implementations

impl<T: PartialEq> PartialEq<Value<T>> for Value<T>

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

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

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

This method tests for !=.

impl<'a, T> PartialEq<T> for Value<&'a T> where
    T: PartialEq<T>, 

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

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

#[must_use]

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

This method tests for !=.

impl<T: Ord> Ord for Value<T>

fn cmp(&self, other: &Value<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl<T: Clone> Clone for Value<T>

fn clone(&self) -> Value<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T> From<T> for Value<T>

fn from(orig: T) -> Value<T>

Performs the conversion.

impl<'a, T> From<Value<&'a T>> for Value<T> where
    T: 'a + Clone, 

fn from(orig: Value<&'a T>) -> Value<T>

Performs the conversion.

impl<T> From<Option<T>> for Value<T>

fn from(orig: Option<T>) -> Value<T>

Performs the conversion.

impl<T> Into<Option<T>> for Value<T>

fn into(self) -> Option<T>

Performs the conversion.

impl<T: Eq> Eq for Value<T>

impl<T: Copy> Copy for Value<T>

impl<T: PartialOrd> PartialOrd<Value<T>> for Value<T>

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

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

fn lt(&self, other: &Value<T>) -> bool

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

fn le(&self, other: &Value<T>) -> bool

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

fn gt(&self, other: &Value<T>) -> bool

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

fn ge(&self, other: &Value<T>) -> bool

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

impl<'a, T> PartialOrd<T> for Value<&'a T> where
    T: PartialOrd<T>, 

fn partial_cmp(&self, other: &T) -> 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<T> Display for Value<T> where
    T: Display, 

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

Formats the value using the given formatter.

impl<'a, T: Hash> Hash for Value<T>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl<T, U> Add<Value<U>> for Value<T> where
    T: Add<U>, 

type Output = Value<<T as Add<U>>::Output>

The resulting type after applying the + operator.

fn add(self, rhs: Value<U>) -> Self::Output

Performs the + operation.

impl<T, U> Sub<Value<U>> for Value<T> where
    T: Sub<U>, 

type Output = Value<<T as Sub<U>>::Output>

The resulting type after applying the - operator.

fn sub(self, rhs: Value<U>) -> Self::Output

Performs the - operation.

impl<T, U> Mul<Value<U>> for Value<T> where
    T: Mul<U>, 

type Output = Value<<T as Mul<U>>::Output>

The resulting type after applying the * operator.

fn mul(self, rhs: Value<U>) -> Self::Output

Performs the * operation.

impl<T, U> Div<Value<U>> for Value<T> where
    T: Div<U>, 

type Output = Value<<T as Div<U>>::Output>

The resulting type after applying the / operator.

fn div(self, rhs: Value<U>) -> Self::Output

Performs the / operation.

impl<T> FromIterator<Value<T>> for FieldData<T> where
    T: Debug + Default, 

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

Creates a value from an iterator.

impl<'a, T> FromIterator<Value<&'a T>> for FieldData<T> where
    T: 'a + Debug + Default + Clone, 

fn from_iter<I: IntoIterator<Item = Value<&'a T>>>(iter: I) -> Self

Creates a value from an iterator.

impl<T: Debug> Debug for Value<T>

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

Formats the value using the given formatter.

impl<'a, T> Serialize for Value<&'a T> where
    T: Serialize, 

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.