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Ignore lifetime params in substitutions

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This commit is contained in:
Lukas Wirth 2020-12-13 11:34:44 +01:00
parent 10f6332831
commit ae8a802085
3 changed files with 17 additions and 3 deletions
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5
crates/hir_def/src/item_tree.rs
View file

@ -246,7 +246,10 @@ struct GenericParamsStorage {
impl GenericParamsStorage {
fn alloc(&mut self, params: GenericParams) -> GenericParamsId {
if params.types.is_empty() && params.where_predicates.is_empty() {
if params.types.is_empty()
&& params.lifetimes.is_empty()
&& params.where_predicates.is_empty()
{
return GenericParamsId::EMPTY;
}

7
crates/hir_ty/src/infer/expr.rs
View file

@ -856,7 +856,12 @@ impl<'a> InferenceContext<'a> {
// handle provided type arguments
if let Some(generic_args) = generic_args {
// if args are provided, it should be all of them, but we can't rely on that
for arg in generic_args.args.iter().take(type_params) {
for arg in generic_args
.args
.iter()
.filter(|arg| matches!(arg, GenericArg::Type(_)))
.take(type_params)
{
match arg {
GenericArg::Type(type_ref) => {
let ty = self.make_ty(type_ref);

8
crates/hir_ty/src/lower.rs
View file

@ -565,7 +565,13 @@ fn substs_from_path_segment(
if generic_args.has_self_type { self_params + type_params } else { type_params };
let skip = if generic_args.has_self_type && self_params == 0 { 1 } else { 0 };
// if args are provided, it should be all of them, but we can't rely on that
for arg in generic_args.args.iter().skip(skip).take(expected_num) {
for arg in generic_args
.args
.iter()
.filter(|arg| matches!(arg, GenericArg::Type(_)))
.skip(skip)
.take(expected_num)
{
match arg {
GenericArg::Type(type_ref) => {
had_explicit_type_args = true;