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generalize

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This commit is contained in:
Aleksey Kladov 2019-01-25 01:05:50 +03:00
parent 1db2cbcb8b
commit 00ba70a095
1 changed files with 17 additions and 4 deletions
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21
crates/ra_hir/src/ids.rs
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@ -1,6 +1,6 @@
use std::{
marker::PhantomData,
hash::Hash,
hash::{Hash, Hasher},
};
use ra_db::{LocationIntener, FileId};
@ -139,13 +139,26 @@ pub(crate) fn id(&self, db: &impl AsRef<HirInterner>) -> MacroCallId {
}
}
#[derive(Debug, PartialEq, Eq, Hash)]
#[derive(Debug)]
pub struct ItemLoc<N: AstNode> {
pub(crate) module: Module,
raw: SourceItemId,
_ty: PhantomData<N>,
}
impl<N: AstNode> PartialEq for ItemLoc<N> {
fn eq(&self, other: &Self) -> bool {
self.module == other.module && self.raw == other.raw
}
}
impl<N: AstNode> Eq for ItemLoc<N> {}
impl<N: AstNode> Hash for ItemLoc<N> {
fn hash<H: Hasher>(&self, hasher: &mut H) {
self.module.hash(hasher);
self.raw.hash(hasher);
}
}
impl<N: AstNode> Clone for ItemLoc<N> {
fn clone(&self) -> ItemLoc<N> {
ItemLoc {
@ -173,14 +186,14 @@ pub(crate) fn new(db: &'a DB, module: Module, file_id: HirFileId) -> LocationCtx
}
pub(crate) fn to_def<N, DEF>(self, ast: &N) -> DEF
where
N: AstNode + Eq + Hash,
N: AstNode,
DEF: AstItemDef<N>,
{
DEF::from_ast(self, ast)
}
}
pub(crate) trait AstItemDef<N: AstNode + Eq + Hash>: ArenaId + Clone {
pub(crate) trait AstItemDef<N: AstNode>: ArenaId + Clone {
fn interner(interner: &HirInterner) -> &LocationIntener<ItemLoc<N>, Self>;
fn from_ast(ctx: LocationCtx<&impl HirDatabase>, ast: &N) -> Self {
let items = ctx.db.file_items(ctx.file_id);