Enum Binding 

pub enum Binding {
    Scalar(TypedValue),
    Vec(Arc<Vec<Binding>>),
    Map(Arc<StructuredMap>),
}

The values bound in a query specification can be:

• Vecs of structured values, for multi-valued component attributes or nested expressions.
• Single structured values, for single-valued component attributes or nested expressions.
• Single typed values, for simple attributes.

The Binding enum defines these three options.

Datomic also supports structured inputs; at present Mentat does not, but this type would also serve that purpose.

Note that maps are not ordered, and so Binding is neither Ord nor PartialOrd.

Variants

Scalar(TypedValue)

Vec(Arc<Vec<Binding>>)

Map(Arc<StructuredMap>)

Implementations

impl Binding

pub fn into_scalar(self) -> Option<TypedValue>

pub fn into_vec(self) -> Option<Arc<Vec<Binding>>>

pub fn into_map(self) -> Option<Arc<StructuredMap>>

pub fn as_scalar(&self) -> Option<&TypedValue>

pub fn as_vec(&self) -> Option<&Vec<Binding>>

pub fn as_map(&self) -> Option<&StructuredMap>

impl Binding

pub fn is_congruent_with<T>(&self, t: T) -> bool

where T: Into<Option<ValueType>>,

Returns true if the provided type is Some and matches this value’s type, or if the provided type is None.

pub fn matches_type(&self, t: ValueType) -> bool

pub fn value_type(&self) -> Option<ValueType>

impl Binding

pub fn into_known_entid(self) -> Option<KnownEntid>

pub fn into_entid(self) -> Option<i64>

pub fn into_kw(self) -> Option<Arc<Keyword>>

pub fn into_boolean(self) -> Option<bool>

pub fn into_long(self) -> Option<i64>

pub fn into_double(self) -> Option<f64>

pub fn into_instant(self) -> Option<DateTime<Utc>>

pub fn into_timestamp(self) -> Option<i64>

pub fn into_string(self) -> Option<Arc<String>>

pub fn into_uuid(self) -> Option<Uuid>

pub fn into_uuid_string(self) -> Option<String>

pub fn into_c_string(self) -> Option<*mut i8>

pub fn into_kw_c_string(self) -> Option<*mut i8>

pub fn into_uuid_c_string(self) -> Option<*mut i8>

pub fn as_entid(&self) -> Option<&i64>

pub fn as_kw(&self) -> Option<&Arc<Keyword>>

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

pub fn as_long(&self) -> Option<&i64>

pub fn as_double(&self) -> Option<&f64>

pub fn as_instant(&self) -> Option<&DateTime<Utc>>

pub fn as_string(&self) -> Option<&Arc<String>>

pub fn as_uuid(&self) -> Option<&Uuid>

Trait Implementations

impl Clone for Binding

fn clone(&self) -> Binding

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Binding

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

Formats the value using the given formatter.

impl Eq for Binding

impl From<StructuredMap> for Binding

fn from(value: StructuredMap) -> Binding

Converts to this type from the input type.

impl<T> From<T> for Binding

where T: Into<TypedValue>,

fn from(value: T) -> Binding

Converts to this type from the input type.

impl From<Vec<Binding>> for Binding

fn from(value: Vec<Binding>) -> Binding

Converts to this type from the input type.

impl PartialEq for Binding

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Binding