Trait darling_core::ast::GenericParamExt[−][src]

pub trait GenericParamExt {
    type TypeParam;
    type LifetimeDef;
    type ConstParam;
    fn as_type_param(&self) -> Option<&Self::TypeParam> { ... }

    fn as_lifetime_def(&self) -> Option<&Self::LifetimeDef> { ... }

    fn as_const_param(&self) -> Option<&Self::ConstParam> { ... }
}
[−]

Extension trait for GenericParam to support getting values by variant.

Usage

darling::ast::Generics needs a way to test its params array in order to iterate over type params. Rather than require callers to use darling::ast::GenericParam in all cases, this trait makes that polymorphic.

Associated Types

type TypeParam[src][−]

The type this GenericParam uses to represent type params and their bounds

type LifetimeDef[src]

type ConstParam[src]

Provided methods

fn as_type_param(&self) -> Option<&Self::TypeParam>[src][−]

If this GenericParam is a type param, get the underlying value.

fn as_lifetime_def(&self) -> Option<&Self::LifetimeDef>[src][−]

If this GenericParam is a lifetime, get the underlying value.

fn as_const_param(&self) -> Option<&Self::ConstParam>[src][−]

If this GenericParam is a const param, get the underlying value.

Implementations on Foreign Types

impl GenericParamExt for GenericParam[src]

type TypeParam = TypeParam

type LifetimeDef = LifetimeDef

type ConstParam = ConstParam

impl GenericParamExt for TypeParam[src]

type TypeParam = TypeParam

type LifetimeDef = ()

type ConstParam = ()

Implementors

impl<T, L, C> GenericParamExt for darling_core::ast::GenericParam<T, L, C>[src]

type TypeParam = T

type LifetimeDef = L

type ConstParam = C