Enum core_traits::Binding
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pub enum Binding {
Scalar(TypedValue),
Vec(ValueRc<Vec<Binding>>),
Map(ValueRc<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(ValueRc<Vec<Binding>>)Map(ValueRc<StructuredMap>)
Methods
impl Binding[src]
pub fn into_scalar(self) -> Option<TypedValue>[src]
pub fn into_vec(self) -> Option<ValueRc<Vec<Binding>>>[src]
pub fn into_map(self) -> Option<ValueRc<StructuredMap>>[src]
pub fn as_scalar(&self) -> Option<&TypedValue>[src]
pub fn as_vec(&self) -> Option<&Vec<Binding>>[src]
pub fn as_map(&self) -> Option<&StructuredMap>[src]
impl Binding[src]
pub fn is_congruent_with<T: Into<Option<ValueType>>>(&self, t: T) -> bool[src]
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[src]
pub fn value_type(&self) -> Option<ValueType>[src]
impl Binding[src]
pub fn into_known_entid(self) -> Option<KnownEntid>[src]
pub fn into_entid(self) -> Option<Entid>[src]
pub fn into_kw(self) -> Option<ValueRc<Keyword>>[src]
pub fn into_boolean(self) -> Option<bool>[src]
pub fn into_long(self) -> Option<i64>[src]
pub fn into_double(self) -> Option<f64>[src]
pub fn into_instant(self) -> Option<DateTime<Utc>>[src]
pub fn into_timestamp(self) -> Option<i64>[src]
pub fn into_string(self) -> Option<ValueRc<String>>[src]
pub fn into_uuid(self) -> Option<Uuid>[src]
pub fn into_uuid_string(self) -> Option<String>[src]
pub fn into_c_string(self) -> Option<*mut c_char>[src]
pub fn into_kw_c_string(self) -> Option<*mut c_char>[src]
pub fn into_uuid_c_string(self) -> Option<*mut c_char>[src]
pub fn as_entid(&self) -> Option<&Entid>[src]
pub fn as_kw(&self) -> Option<&ValueRc<Keyword>>[src]
pub fn as_boolean(&self) -> Option<&bool>[src]
pub fn as_long(&self) -> Option<&i64>[src]
pub fn as_double(&self) -> Option<&f64>[src]
pub fn as_instant(&self) -> Option<&DateTime<Utc>>[src]
pub fn as_string(&self) -> Option<&ValueRc<String>>[src]
pub fn as_uuid(&self) -> Option<&Uuid>[src]
Trait Implementations
impl Clone for Binding[src]
fn clone(&self) -> Binding[src]
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src]
Performs copy-assignment from source. Read more
impl Debug for Binding[src]
fn fmt(&self, __arg_0: &mut Formatter) -> Result[src]
Formats the value using the given formatter. Read more
impl Eq for Binding[src]
impl PartialEq for Binding[src]
fn eq(&self, __arg_0: &Binding) -> bool[src]
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &Binding) -> bool[src]
This method tests for !=.
impl<T> From<T> for Binding where
T: Into<TypedValue>, [src]
T: Into<TypedValue>,
impl From<StructuredMap> for Binding[src]
fn from(value: StructuredMap) -> Self[src]
Performs the conversion.