Enum asdi::edb::Constant

pub enum Constant {
    String(String),
    Integer(i64),
    Boolean(bool),
}

A constant value, with variants matching those in AttributeKind.

Variants

String(String)

Tuple Fields

0: String

Integer(i64)

Tuple Fields

0: i64

Boolean(bool)

Tuple Fields

0: bool

Implementations

impl Constant

pub fn new_true() -> Self

pub fn new_false() -> Self

pub fn new_size(v: usize) -> Self

pub fn kind(&self) -> AttributeKind

pub fn is_identifier(s: &str) -> bool

Trait Implementations

impl Clone for Constant

fn clone(&self) -> Constant

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Collection<Constant> for Fact

fn is_empty(&self) -> bool

fn len(&self) -> usize

fn iter(&self) -> Box<dyn Iterator<Item = &Constant>>

fn contains(&self, value: &Constant) -> bool

impl Debug for Constant

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

Formats the value using the given formatter.

impl Display for Constant

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

Formats the value using the given formatter.

impl From<&'_ str> for Constant

fn from(s: &str) -> Self

Performs the conversion.

impl From<Constant> for AttributeKind

fn from(v: Constant) -> Self

Performs the conversion.

impl From<Constant> for Term

fn from(v: Constant) -> Self

Performs the conversion.

impl From<Constant> for Row

fn from(v: Constant) -> Self

Performs the conversion.

impl From<String> for Constant

fn from(v: String) -> Self

Performs the conversion.

impl From<bool> for Constant

fn from(v: bool) -> Self

Performs the conversion.

impl From<i64> for Constant

fn from(v: i64) -> Self

Performs the conversion.

impl Hash for Constant

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 IndexedCollection<usize, Constant> for Fact

fn get(&self, index: &usize) -> Option<&Constant>

fn contains_index(&self, index: &usize) -> bool

impl Ord for Constant

fn cmp(&self, other: &Constant) -> 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.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Constant> for Constant

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

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

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

This method tests for !=.

impl PartialOrd<Constant> for Constant

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

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

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

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

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

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

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

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

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 Eq for Constant

impl StructuralEq for Constant

impl StructuralPartialEq for Constant