gccrs: Add name resolution for on globbing use decl

This is the first part of the code required to enable globbing on use
declarations.

gcc/rust/ChangeLog:

	* resolve/rust-toplevel-name-resolver-2.0.cc (GlobbingVisitor::visit):
	Insert names into their namespace.
	(TopLevel::visit): Insert ast module.
	(TopLevel::handle_use_dec): Resolve use declaration.
	(TopLevel::handle_use_glob): Use globbing visitor.
	(flatten_list): Use globbing path vector.
	(flatten_glob): Likewise.
	(flatten): Likewise.
	(prefix_subpaths): Add a function to prefix subpath.
	* resolve/rust-toplevel-name-resolver-2.0.h (class GlobbingVisitor):
	Add globbing visitor.
	* util/rust-hir-map.cc (Mappings::insert_ast_module): Add function to
	insert module in module hashmap.
	(Mappings::lookup_ast_module): Add function to retrieve ast module.
	* util/rust-hir-map.h: Add module map and getter/setter prototypes.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/rust/util/rust-hir-map.h b/gcc/rust/util/rust-hir-map.h
index 927c012..92af067 100644
--- a/gcc/rust/util/rust-hir-map.h
+++ b/gcc/rust/util/rust-hir-map.h
@@ -328,6 +328,8 @@ public:
   void insert_visibility (NodeId id, Privacy::ModuleVisibility visibility);
   bool lookup_visibility (NodeId id, Privacy::ModuleVisibility &def);
 
+  void insert_ast_module (AST::Module *);
+  tl::optional<AST::Module *> lookup_ast_module (NodeId id);
   void insert_module_child (NodeId module, NodeId child);
   tl::optional<std::vector<NodeId> &> lookup_module_children (NodeId module);
 
@@ -427,6 +429,7 @@ private:
   std::map<NodeId, std::vector<NodeId>> module_child_map;
   std::map<NodeId, std::vector<Resolver::CanonicalPath>> module_child_items;
   std::map<NodeId, NodeId> child_to_parent_module_map;
+  std::map<NodeId, AST::Module *> modules;
 
   // AST mappings
   std::map<NodeId, AST::Item *> ast_item_mappings;