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Auto merge of #13725 - bvanjoi:resolve-const-triat-impls, r=flodiebold

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feat: resolve const for trait impls

Fixed #13694
This commit is contained in:
bors 2022-12-10 13:58:28 +00:00
commit a3ea20a142
6 changed files with 245 additions and 18 deletions
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34
crates/hir/src/source_analyzer.rs
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@ -21,8 +21,8 @@ use hir_def::{
path::{ModPath, Path, PathKind},
resolver::{resolver_for_scope, Resolver, TypeNs, ValueNs},
type_ref::Mutability,
AsMacroCall, AssocItemId, DefWithBodyId, FieldId, FunctionId, ItemContainerId, LocalFieldId,
Lookup, ModuleDefId, TraitId, VariantId,
AsMacroCall, AssocItemId, ConstId, DefWithBodyId, FieldId, FunctionId, ItemContainerId,
LocalFieldId, Lookup, ModuleDefId, TraitId, VariantId,
};
use hir_expand::{
builtin_fn_macro::BuiltinFnLikeExpander,
@ -482,7 +482,7 @@ impl SourceAnalyzer {
let infer = self.infer.as_deref()?;
if let Some(path_expr) = parent().and_then(ast::PathExpr::cast) {
let expr_id = self.expr_id(db, &path_expr.into())?;
if let Some(assoc) = infer.assoc_resolutions_for_expr(expr_id) {
if let Some((assoc, subs)) = infer.assoc_resolutions_for_expr(expr_id) {
let assoc = match assoc {
AssocItemId::FunctionId(f_in_trait) => {
match infer.type_of_expr.get(expr_id) {
@ -501,7 +501,13 @@ impl SourceAnalyzer {
}
}
}
AssocItemId::ConstId(const_id) => {
if let Some(subs) = subs {
self.resolve_impl_const_or_trait_def(db, const_id, subs).into()
} else {
assoc
}
}
_ => assoc,
};
@ -515,7 +521,7 @@ impl SourceAnalyzer {
prefer_value_ns = true;
} else if let Some(path_pat) = parent().and_then(ast::PathPat::cast) {
let pat_id = self.pat_id(&path_pat.into())?;
if let Some(assoc) = infer.assoc_resolutions_for_pat(pat_id) {
if let Some((assoc, _)) = infer.assoc_resolutions_for_pat(pat_id) {
return Some(PathResolution::Def(AssocItem::from(assoc).into()));
}
if let Some(VariantId::EnumVariantId(variant)) =
@ -792,6 +798,24 @@ impl SourceAnalyzer {
method_resolution::lookup_impl_method(db, env, func, substs)
}
fn resolve_impl_const_or_trait_def(
&self,
db: &dyn HirDatabase,
const_id: ConstId,
subs: Substitution,
) -> ConstId {
let krate = self.resolver.krate();
let owner = match self.resolver.body_owner() {
Some(it) => it,
None => return const_id,
};
let env = owner.as_generic_def_id().map_or_else(
|| Arc::new(hir_ty::TraitEnvironment::empty(krate)),
|d| db.trait_environment(d),
);
method_resolution::lookup_impl_const(db, env, const_id, subs)
}
fn lang_trait_fn(
&self,
db: &dyn HirDatabase,