Trait darling::ast::GenericParamExt

source · 
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> { ... }
}
Expand description

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.

Required Associated Types§

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

Provided Methods§

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

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

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

Implementations on Foreign Types§

Implementors§