Trait UsesLifetimes 

pub trait UsesLifetimes {
    // Required method
    fn uses_lifetimes<'a>(
        &self,
        options: &Options,
        lifetimes: &'a LifetimeSet,
    ) -> LifetimeRefSet<'a>;

    // Provided method
    fn uses_lifetimes_cloned(
        &self,
        options: &Options,
        lifetimes: &LifetimeSet,
    ) -> LifetimeSet { ... }
}

Searcher for finding lifetimes in a syntax tree. This can be used to determine which lifetimes must be emitted in generated code.

Required Methods

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

Returns the subset of the queried lifetimes that are used by the implementing syntax element.

This method only accounts for direct usage by the element; indirect usage via bounds or where predicates are not detected.

Provided Methods

fn uses_lifetimes_cloned( &self, options: &Options, lifetimes: &LifetimeSet, ) -> LifetimeSet

Find all used lifetimes, then clone them and return that set.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl UsesLifetimes for AngleBracketedGenericArguments

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for AssocType

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for BareFnArg

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for BoundLifetimes

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for ConstParam

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Constraint

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Data

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for DataEnum

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for DataStruct

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for DataUnion

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Field

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Fields

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for FieldsNamed

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for GenericArgument

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for GenericParam

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for Lifetime

fn uses_lifetimes<'a>( &self, _: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for LifetimeParam

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for ParenthesizedGenericArguments

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Path

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for PathArguments

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for PathSegment

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for PredicateLifetime

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for PredicateType

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for QSelf

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for ReturnType

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for TraitBound

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Type

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for TypeArray

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeBareFn

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeGroup

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeImplTrait

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeParam

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeParamBound

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for TypeParen

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypePath

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl UsesLifetimes for TypePtr

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeReference

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeSlice

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeTraitObject

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for TypeTuple

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for Variant

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen LifetimeSet, ) -> LifetimeRefSet<'gen>

impl UsesLifetimes for WherePredicate

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl<T: UsesLifetimes, U> UsesLifetimes for Punctuated<T, U>

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl<T: UsesLifetimes> UsesLifetimes for Option<T>

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

impl<T: UsesLifetimes> UsesLifetimes for Vec<T>

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a LifetimeSet, ) -> LifetimeRefSet<'a>

Implementors

impl UsesLifetimes for Ignored

impl<P: UsesLifetimes, O> UsesLifetimes for WithOriginal<P, O>

Get the lifetime usage of parsed.

impl<T: UsesLifetimes> UsesLifetimes for darling_core::ast::Fields<T>

impl<V: UsesLifetimes, F: UsesLifetimes> UsesLifetimes for darling_core::ast::Data<V, F>