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Prevent re-allocation in CallableSig::from_params_and_return

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This commit is contained in:
Lukas Wirth 2024-06-21 19:26:08 +02:00
parent 34ba8db3ed
commit 4c62e6b05f
2 changed files with 9 additions and 8 deletions
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11
crates/hir-ty/src/lib.rs
View file

@ -513,14 +513,16 @@ pub type PolyFnSig = Binders<CallableSig>;
impl CallableSig {
pub fn from_params_and_return(
mut params: Vec<Ty>,
params: impl ExactSizeIterator<Item = Ty>,
ret: Ty,
is_varargs: bool,
safety: Safety,
abi: FnAbi,
) -> CallableSig {
params.push(ret);
CallableSig { params_and_return: params.into(), is_varargs, safety, abi }
let mut params_and_return = Vec::with_capacity(params.len() + 1);
params_and_return.extend(params);
params_and_return.push(ret);
CallableSig { params_and_return: params_and_return.into(), is_varargs, safety, abi }
}
pub fn from_def(db: &dyn HirDatabase, def: FnDefId, substs: &Substitution) -> CallableSig {
@ -935,8 +937,7 @@ pub fn callable_sig_from_fn_trait(
.as_tuple()?
.iter(Interner)
.map(|it| it.assert_ty_ref(Interner))
.cloned()
.collect();
.cloned();
return Some((
fn_x,

6
crates/hir-ty/src/lower.rs
View file

@ -1855,7 +1855,7 @@ fn fn_sig_for_fn(db: &dyn HirDatabase, def: FunctionId) -> PolyFnSig {
let ctx_params = TyLoweringContext::new(db, &resolver, def.into())
.with_impl_trait_mode(ImplTraitLoweringMode::Variable)
.with_type_param_mode(ParamLoweringMode::Variable);
let params = data.params.iter().map(|tr| ctx_params.lower_ty(tr)).collect::<Vec<_>>();
let params = data.params.iter().map(|tr| ctx_params.lower_ty(tr));
let ctx_ret = TyLoweringContext::new(db, &resolver, def.into())
.with_impl_trait_mode(ImplTraitLoweringMode::Opaque)
.with_type_param_mode(ParamLoweringMode::Variable);
@ -1909,7 +1909,7 @@ fn fn_sig_for_struct_constructor(db: &dyn HirDatabase, def: StructId) -> PolyFnS
let resolver = def.resolver(db.upcast());
let ctx = TyLoweringContext::new(db, &resolver, AdtId::from(def).into())
.with_type_param_mode(ParamLoweringMode::Variable);
let params = fields.iter().map(|(_, field)| ctx.lower_ty(&field.type_ref)).collect::<Vec<_>>();
let params = fields.iter().map(|(_, field)| ctx.lower_ty(&field.type_ref));
let (ret, binders) = type_for_adt(db, def.into()).into_value_and_skipped_binders();
Binders::new(
binders,
@ -1941,7 +1941,7 @@ fn fn_sig_for_enum_variant_constructor(db: &dyn HirDatabase, def: EnumVariantId)
let resolver = def.resolver(db.upcast());
let ctx = TyLoweringContext::new(db, &resolver, DefWithBodyId::VariantId(def).into())
.with_type_param_mode(ParamLoweringMode::Variable);
let params = fields.iter().map(|(_, field)| ctx.lower_ty(&field.type_ref)).collect::<Vec<_>>();
let params = fields.iter().map(|(_, field)| ctx.lower_ty(&field.type_ref));
let (ret, binders) =
type_for_adt(db, def.lookup(db.upcast()).parent.into()).into_value_and_skipped_binders();
Binders::new(