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Add const generics

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This commit is contained in:
hkalbasi 2022-03-09 22:20:24 +03:30
parent 5e85158706
commit b301b040f5
32 changed files with 1272 additions and 527 deletions
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21
crates/hir/src/display.rs
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@ -256,7 +256,7 @@ impl HirDisplay for TypeParam {
}
let bounds = f.db.generic_predicates_for_param(self.id.parent(), self.id.into(), None);
let substs = TyBuilder::type_params_subst(f.db, self.id.parent());
let substs = TyBuilder::placeholder_subst(f.db, self.id.parent());
let predicates: Vec<_> =
bounds.iter().cloned().map(|b| b.substitute(Interner, &substs)).collect();
let krate = self.id.parent().krate(f.db).id;
@ -292,8 +292,9 @@ impl HirDisplay for ConstParam {
fn write_generic_params(def: GenericDefId, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
let params = f.db.generic_params(def);
if params.lifetimes.is_empty()
&& params.type_or_consts.iter().all(|x| x.1.const_param().is_none())
&& params
.tocs
.type_or_consts
.iter()
.filter_map(|x| x.1.type_param())
.all(|param| !matches!(param.provenance, TypeParamProvenance::TypeParamList))
@ -315,7 +316,7 @@ fn write_generic_params(def: GenericDefId, f: &mut HirFormatter) -> Result<(), H
delim(f)?;
write!(f, "{}", lifetime.name)?;
}
for (_, ty) in params.tocs.iter() {
for (_, ty) in params.type_or_consts.iter() {
if let Some(name) = &ty.name() {
match ty {
TypeOrConstParamData::TypeParamData(ty) => {
@ -348,7 +349,9 @@ fn write_where_clause(def: GenericDefId, f: &mut HirFormatter) -> Result<(), Hir
// unnamed type targets are displayed inline with the argument itself, e.g. `f: impl Y`.
let is_unnamed_type_target = |target: &WherePredicateTypeTarget| match target {
WherePredicateTypeTarget::TypeRef(_) => false,
WherePredicateTypeTarget::TypeOrConstParam(id) => params.tocs[*id].name().is_none(),
WherePredicateTypeTarget::TypeOrConstParam(id) => {
params.type_or_consts[*id].name().is_none()
}
};
let has_displayable_predicate = params
@ -364,10 +367,12 @@ fn write_where_clause(def: GenericDefId, f: &mut HirFormatter) -> Result<(), Hir
let write_target = |target: &WherePredicateTypeTarget, f: &mut HirFormatter| match target {
WherePredicateTypeTarget::TypeRef(ty) => ty.hir_fmt(f),
WherePredicateTypeTarget::TypeOrConstParam(id) => match &params.tocs[*id].name() {
Some(name) => write!(f, "{}", name),
None => write!(f, "{{unnamed}}"),
},
WherePredicateTypeTarget::TypeOrConstParam(id) => {
match &params.type_or_consts[*id].name() {
Some(name) => write!(f, "{}", name),
None => write!(f, "{{unnamed}}"),
}
}
};
write!(f, "\nwhere")?;