| use syn::Generics; |
| |
| use crate::usage::{IdentSet, LifetimeSet}; |
| |
| /// Extension trait for pulling specific generics data from a generics AST representation. |
| pub trait GenericsExt { |
| /// Get the set of all lifetimes declared by the syntax element. |
| /// This does not look for usage of the lifetime; see `UsesLifetimes` for that. |
| fn declared_lifetimes(&self) -> LifetimeSet; |
| |
| /// Get the set of all type parameters declared by the syntax element. |
| /// This does not look for usage of the type parameter; see `UsesTypeParams` for that. |
| fn declared_type_params(&self) -> IdentSet; |
| } |
| |
| impl GenericsExt for Generics { |
| fn declared_lifetimes(&self) -> LifetimeSet { |
| self.lifetimes().map(|lt| lt.lifetime.clone()).collect() |
| } |
| |
| fn declared_type_params(&self) -> IdentSet { |
| self.type_params().map(|tp| tp.ident.clone()).collect() |
| } |
| } |