Trait darling::usage::UsesLifetimes

[+] Show declaration

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>> { ... }
}

[−] Expand description

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.

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.

Implementations on Foreign Types

impl UsesLifetimes for PathSegment[−]

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

impl UsesLifetimes for PredicateLifetime[−]

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

impl UsesLifetimes for DataUnion[−]

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

impl UsesLifetimes for Binding[−]

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

impl UsesLifetimes for QSelf[−]

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

impl UsesLifetimes for TypeTuple[−]

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

impl UsesLifetimes for TypeTraitObject[−]

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

impl UsesLifetimes for TypeSlice[−]

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

impl UsesLifetimes for AngleBracketedGenericArguments[−]

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

impl UsesLifetimes for TypeReference[−]

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

impl UsesLifetimes for BareFnArg[−]

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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, [−]

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

impl UsesLifetimes for Data[−]

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

impl UsesLifetimes for TraitBound[−]

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

impl UsesLifetimes for ParenthesizedGenericArguments[−]

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

impl UsesLifetimes for Constraint[−]

[+] Show hidden undocumented items

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

impl UsesLifetimes for PathArguments[−]

[+] Show hidden undocumented items

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

impl UsesLifetimes for TypeParamBound[−]

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

impl UsesLifetimes for FieldsNamed[−]

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

impl<T> UsesLifetimes for Vec<T, Global> where
    T: UsesLifetimes, [−]

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

impl UsesLifetimes for BoundLifetimes[−]

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

impl UsesLifetimes for PredicateEq[−]

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

impl UsesLifetimes for LifetimeDef[−]

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

impl UsesLifetimes for WherePredicate[−]

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

impl UsesLifetimes for TypeGroup[−]

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

impl UsesLifetimes for ReturnType[−]

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

impl UsesLifetimes for Path[−]

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

impl UsesLifetimes for Field[−]

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

impl UsesLifetimes for Lifetime[−]

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

impl UsesLifetimes for PredicateType[−]

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

impl UsesLifetimes for DataEnum[−]

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

impl UsesLifetimes for TypePtr[−]

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

impl UsesLifetimes for GenericArgument[−]

[+] Show hidden undocumented items

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

impl<T> UsesLifetimes for Option<T> where
    T: UsesLifetimes, [−]

[+] Show hidden undocumented items

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

impl UsesLifetimes for DataStruct[−]

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

impl UsesLifetimes for TypeImplTrait[−]

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

impl UsesLifetimes for Fields[−]

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

impl UsesLifetimes for Variant[−]

[+] Show hidden undocumented items

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

impl UsesLifetimes for TypePath[−]

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

impl UsesLifetimes for TypeParen[−]

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

impl UsesLifetimes for TypeArray[−]

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

impl UsesLifetimes for Type[−]

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

impl UsesLifetimes for TypeBareFn[−]

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

Implementors

impl UsesLifetimes for Ignored[+]

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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, [+]

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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, [+]

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