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compiler: handle aliases to pointer types with interfaces

Browse source 
Test case is https://golang.org/cl/241997.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/241998
This commit is contained in:
Ian Lance Taylor 2020-07-10 10:28:34 -07:00
parent 2b4bbc1707
commit e7d6d8f9f7
2 changed files with 13 additions and 6 deletions
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2
gcc/go/gofrontend/MERGE
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@ -1,4 +1,4 @@
2ad0970e9da95024110cd3244e9e21313af70a5f
ce70fa16a73e3f162de01deab6b5d17783e6b76b
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.

17
gcc/go/gofrontend/types.cc
View file

@ -9208,6 +9208,7 @@ Interface_type::implements_interface(const Type* t, std::string* reason) const
if (this->all_methods_ == NULL)
return true;
t = t->unalias();
bool is_pointer = false;
const Named_type* nt = t->named_type();
const Struct_type* st = t->struct_type();
@ -9220,6 +9221,7 @@ Interface_type::implements_interface(const Type* t, std::string* reason) const
{
// If T is a pointer to a named type, then we need to look at
// the type to which it points.
pt = pt->unalias();
is_pointer = true;
nt = pt->named_type();
st = pt->struct_type();
@ -10408,19 +10410,24 @@ Named_type::interface_method_table(Interface_type* interface, bool is_pointer)
return Expression::make_error(this->location_);
if (this->is_alias_)
{
if (this->type_->named_type() != NULL)
Type* t = this->type_;
if (!is_pointer && t->points_to() != NULL)
{
t = t->points_to();
is_pointer = true;
}
if (t->named_type() != NULL)
{
if (this->seen_alias_)
return Expression::make_error(this->location_);
this->seen_alias_ = true;
Named_type* nt = this->type_->named_type();
Named_type* nt = t->named_type();
Expression* ret = nt->interface_method_table(interface, is_pointer);
this->seen_alias_ = false;
return ret;
}
if (this->type_->struct_type() != NULL)
return this->type_->struct_type()->interface_method_table(interface,
is_pointer);
if (t->struct_type() != NULL)
return t->struct_type()->interface_method_table(interface, is_pointer);
go_unreachable();
}
return Type::interface_method_table(this, interface, is_pointer,