pub enum Value {
    Null,
    Boolean(bool),
    Integer(u32),
    String(String),
    List(Vec<Value>),
    Set(BTreeSet<Value>),
    SyntaxNode(SyntaxNodeRef),
    GraphNode(GraphNodeRef),
}
Expand description

The value of an attribute

Variants§

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Null

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Boolean(bool)

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Integer(u32)

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String(String)

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List(Vec<Value>)

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Set(BTreeSet<Value>)

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SyntaxNode(SyntaxNodeRef)

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GraphNode(GraphNodeRef)

Implementations§

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impl Value

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pub fn from_nodes<'tree, NI: IntoIterator<Item = Node<'tree>>>( graph: &mut Graph<'tree>, nodes: NI, quantifier: CaptureQuantifier ) -> Value

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impl Value

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pub fn is_null(&self) -> bool

Check if this value is null

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pub fn into_boolean(self) -> Result<bool, ExecutionError>

Coerces this value into a boolean, returning an error if it’s some other type of value.

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pub fn as_boolean(&self) -> Result<bool, ExecutionError>

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pub fn into_integer(self) -> Result<u32, ExecutionError>

Coerces this value into an integer, returning an error if it’s some other type of value.

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pub fn as_integer(&self) -> Result<u32, ExecutionError>

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pub fn into_string(self) -> Result<String, ExecutionError>

Coerces this value into a string, returning an error if it’s some other type of value.

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pub fn as_str(&self) -> Result<&str, ExecutionError>

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pub fn into_list(self) -> Result<Vec<Value>, ExecutionError>

Coerces this value into a list, returning an error if it’s some other type of value.

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pub fn as_list(&self) -> Result<&Vec<Value>, ExecutionError>

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pub fn into_graph_node_ref<'a, 'tree>( self ) -> Result<GraphNodeRef, ExecutionError>

Coerces this value into a graph node reference, returning an error if it’s some other type of value.

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pub fn as_graph_node_ref<'a, 'tree>( &self ) -> Result<GraphNodeRef, ExecutionError>

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pub fn into_syntax_node_ref<'a, 'tree>( self ) -> Result<SyntaxNodeRef, ExecutionError>

Coerces this value into a syntax node reference, returning an error if it’s some other type of value.

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pub fn into_syntax_node<'a, 'tree>( self, graph: &'a Graph<'tree> ) -> Result<&'a Node<'tree>, ExecutionError>

👎Deprecated: Use the pattern graph[value.into_syntax_node_ref(graph)] instead

Coerces this value into a syntax node, returning an error if it’s some other type of value.

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pub fn as_syntax_node_ref<'a, 'tree>( &self ) -> Result<SyntaxNodeRef, ExecutionError>

Trait Implementations§

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impl Clone for Value

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fn clone(&self) -> Value

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Value

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

Formats the value using the given formatter. Read more
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impl Display for Value

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

Formats the value using the given formatter. Read more
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impl From<&str> for Value

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fn from(value: &str) -> Value

Converts to this type from the input type.
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impl From<BTreeSet<Value>> for Value

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fn from(value: BTreeSet<Value>) -> Value

Converts to this type from the input type.
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impl From<GraphNodeRef> for Value

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fn from(value: GraphNodeRef) -> Value

Converts to this type from the input type.
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impl From<String> for Value

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fn from(value: String) -> Value

Converts to this type from the input type.
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impl From<SyntaxNodeRef> for Value

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fn from(value: SyntaxNodeRef) -> Value

Converts to this type from the input type.
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impl From<Vec<Value>> for Value

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

Converts to this type from the input type.
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impl From<bool> for Value

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fn from(value: bool) -> Value

Converts to this type from the input type.
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impl From<u32> for Value

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fn from(value: u32) -> Value

Converts to this type from the input type.
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impl Hash for Value

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Value

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

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Value

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Value

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

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

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

Serialize this value into the given Serde serializer. Read more
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impl Eq for Value

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impl StructuralPartialEq for Value

Auto Trait Implementations§

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impl RefUnwindSafe for Value

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impl Send for Value

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impl Sync for Value

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impl Unpin for Value

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impl UnwindSafe for Value

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.