Trait UsesLifetimes

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

    // Provided method
    fn uses_lifetimes_cloned(
        &self,
        options: &Options,
        lifetimes: &HashSet<Lifetime, BuildHasherDefault<FnvHasher>>,
    ) -> HashSet<Lifetime, BuildHasherDefault<FnvHasher>> { ... }
}

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 HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

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: &HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<Lifetime, BuildHasherDefault<FnvHasher>>

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

Implementations on Foreign Types

impl UsesLifetimes for Fields

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Data

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for GenericParam

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeParamBound

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for WherePredicate

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for GenericArgument

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for PathArguments

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for ReturnType

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Type

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Field

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for FieldsNamed

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Variant

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for DataEnum

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for DataStruct

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for DataUnion

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for BoundLifetimes

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for ConstParam

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for LifetimeParam

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for PredicateLifetime

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for PredicateType

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TraitBound

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeParam

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Lifetime

fn uses_lifetimes<'a>( &self, _: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for AngleBracketedGenericArguments

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for AssocType

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Constraint

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for ParenthesizedGenericArguments

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for Path

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for PathSegment

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for QSelf

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for BareFnArg

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeArray

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeBareFn

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeGroup

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeImplTrait

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeParen

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypePath

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypePtr

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeReference

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeSlice

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeTraitObject

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl UsesLifetimes for TypeTuple

fn uses_lifetimes<'gen>( &self, options: &Options, type_set: &'gen HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'gen Lifetime, BuildHasherDefault<FnvHasher>>

impl<T> UsesLifetimes for Option<T>

where T: UsesLifetimes,

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

impl<T> UsesLifetimes for Vec<T>

where T: UsesLifetimes,

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

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

where T: UsesLifetimes,

fn uses_lifetimes<'a>( &self, options: &Options, lifetimes: &'a HashSet<Lifetime, BuildHasherDefault<FnvHasher>>, ) -> HashSet<&'a Lifetime, BuildHasherDefault<FnvHasher>>

Implementors

impl UsesLifetimes for Ignored

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

where T: UsesLifetimes,

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

where V: UsesLifetimes, F: UsesLifetimes,