Struct UsageEvent 

#[non_exhaustive]
pub struct UsageEvent {
    pub node_id: NodeId,
    pub role: UsageRole,
    pub arg_index: Option<i64>,
    pub subpath: Option<NodeId>,
}

A recorded use of a symbol, tracked for data-flow analysis.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

node_id: NodeId

Id of the node where the symbol is used.

role: UsageRole

How the symbol participates at that node.

arg_index: Option<i64>

The argument’s position, for UsageRole::Argument.

subpath: Option<NodeId>

Id of the object path used, when only part of a value is affected.

Trait Implementations

impl Clone for UsageEvent

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UsageEvent

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

Formats the value using the given formatter.

impl Eq for UsageEvent

impl PartialEq for UsageEvent

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UsageEvent