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//! Temp module to wrap hir_def::generics
use std::sync::Arc;
use crate::{
db::DefDatabase, Adt, Const, Container, Enum, EnumVariant, Function, ImplBlock, Struct, Trait,
TypeAlias, Union,
};
pub use hir_def::generics::{GenericParam, GenericParams, WherePredicate};
#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
pub enum GenericDef {
Function(Function),
Adt(Adt),
Trait(Trait),
TypeAlias(TypeAlias),
ImplBlock(ImplBlock),
// enum variants cannot have generics themselves, but their parent enums
// can, and this makes some code easier to write
EnumVariant(EnumVariant),
// consts can have type parameters from their parents (i.e. associated consts of traits)
Const(Const),
}
impl_froms!(
GenericDef: Function,
Adt(Struct, Enum, Union),
Trait,
TypeAlias,
ImplBlock,
EnumVariant,
Const
);
impl From<Container> for GenericDef {
fn from(c: Container) -> Self {
match c {
Container::Trait(trait_) => trait_.into(),
Container::ImplBlock(impl_block) => impl_block.into(),
}
}
}
pub trait HasGenericParams: Copy {
fn generic_params(self, db: &impl DefDatabase) -> Arc<GenericParams>;
}
impl<T> HasGenericParams for T
where
T: Into<GenericDef> + Copy,
{
fn generic_params(self, db: &impl DefDatabase) -> Arc<GenericParams> {
db.generic_params(self.into().into())
}
}
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