Struct Expression 

pub struct Expression {
    pub kind: ExpressionKind,
    pub source_location: Option<Source>,
}

An expression that can be evaluated, with source location

Expressions use semantic equality and hashing - two expressions with the same structure (kind) are equal/hash-equal regardless of source location.

Fields

kind: ExpressionKind

source_location: Option<Source>

Implementations

impl Expression

pub fn new(kind: ExpressionKind, source_location: Option<Source>) -> Self

Create a new expression with kind and source location

pub fn get_source_text( &self, sources: &HashMap<String, String>, ) -> Option<String>

Get the source text for this expression from the given sources map

Returns None if the expression has no source location or the source is not found.

pub fn collect_fact_paths(&self, facts: &mut HashSet<FactPath>)

Collect all FactPath references from this expression tree.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Expression

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

Formats the value using the given formatter.

impl Hash for Expression

Semantic hashing - hashes expression structure only, ignoring source location

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Expression

Semantic equality - compares expressions by structure only, ignoring source location

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Expression

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Expression