Trait darling::usage::UsesLifetimes

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

    pub 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

pub fn uses_lifetimes(
    &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.

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Provided methods

pub 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.

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Implementations on Foreign Types

impl UsesLifetimes for Data

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

impl UsesLifetimes for PredicateEq

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

impl UsesLifetimes for TypePath

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

impl UsesLifetimes for Type

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

impl UsesLifetimes for DataEnum

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

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

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

impl UsesLifetimes for TypeSlice

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

impl UsesLifetimes for AngleBracketedGenericArguments

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

impl UsesLifetimes for Constraint

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

impl UsesLifetimes for TypeParen

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

impl UsesLifetimes for Field

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

impl UsesLifetimes for Binding

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

impl UsesLifetimes for PredicateLifetime

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

impl UsesLifetimes for DataUnion

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

impl UsesLifetimes for TypeTraitObject

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

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

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

impl UsesLifetimes for DataStruct

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

impl UsesLifetimes for WherePredicate

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

impl UsesLifetimes for ReturnType

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

impl UsesLifetimes for BareFnArg

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

impl UsesLifetimes for PathArguments

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

impl UsesLifetimes for Fields

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

impl UsesLifetimes for PredicateType

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

impl UsesLifetimes for TypeTuple

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

impl UsesLifetimes for Variant

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

impl UsesLifetimes for TraitBound

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

impl UsesLifetimes for Path

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

impl UsesLifetimes for TypeImplTrait

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

impl UsesLifetimes for TypeArray

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

impl UsesLifetimes for QSelf

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

impl UsesLifetimes for BoundLifetimes

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

impl UsesLifetimes for ParenthesizedGenericArguments

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

impl UsesLifetimes for FieldsNamed

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

impl UsesLifetimes for Lifetime

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

impl<T> UsesLifetimes for Vec<T, Global> where
    T: UsesLifetimes, 

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

impl UsesLifetimes for GenericArgument

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

impl UsesLifetimes for TypePtr

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

impl UsesLifetimes for LifetimeDef

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

impl UsesLifetimes for TypeBareFn

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

impl UsesLifetimes for PathSegment

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

impl UsesLifetimes for TypeGroup

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

impl UsesLifetimes for TypeReference

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

impl UsesLifetimes for TypeParamBound

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

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Implementors

impl UsesLifetimes for Ignored

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

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

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

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

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

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