Struct libdata::column::Ident

pub struct Ident(_);

An identity of a column.

While the Value structure holds the actual data (one „cell“ of the table), this is something like the name of the column. This specifies we want eg. a remote IP address without having the concrete IP address in hand.

Methods

impl Ident

fn decode_value<'de, D>(&self, des: D) -> Result<Option<Value>, D::Error> where
    D: Deserializer<'de>, 

Decodes a value of the corresponding column type.

It also can decode null as the None variant, eg. it assumes the value is optional.

Panics

If the ident hasn't been registered.

fn of<C: Type>() -> Self

Provides the identity of the given column type.

Trait Implementations

impl Copy for Ident

impl Clone for Ident

fn clone(&self) -> Ident

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Ident

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for Ident

impl Hash for Ident

fn hash<__H: Hasher>(&self, __arg_0: &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 Ord for Ident

fn cmp(&self, __arg_0: &Ident) -> Ordering

This method returns an Ordering between self and other.

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

🔬 This is a nightly-only experimental API. (ord_max_min)

Compares and returns the maximum of two values.

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

🔬 This is a nightly-only experimental API. (ord_max_min)

Compares and returns the minimum of two values.

impl PartialEq for Ident

fn eq(&self, __arg_0: &Ident) -> bool

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

fn ne(&self, __arg_0: &Ident) -> bool

This method tests for !=.

impl PartialOrd for Ident

fn partial_cmp(&self, __arg_0: &Ident) -> Option<Ordering>

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

fn lt(&self, __arg_0: &Ident) -> bool

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

fn le(&self, __arg_0: &Ident) -> bool

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

fn gt(&self, __arg_0: &Ident) -> bool

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

fn ge(&self, __arg_0: &Ident) -> bool

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

impl Serialize for Ident

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

Serialize this value into the given Serde serializer.

impl<'de> Deserialize<'de> for Ident

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.