Merge #1191

1191: Resolve simple paths in use items r=CohenArthur a=CohenArthur

In order to resolve `SimplePath`s, we have to expand all paths present
in a `UseDeclaration` and resolve them. For example, we want to resolve
two paths with the following statement `use foo::bar::{baz, bul}`:
`foo::bar::baz` and `foo::bar::bul`
This also removes the prelude inclusion (`use std::prelude::v1::*`)
since we cannot resolve it (yet!)

Needs #1172 to compile
Adresses #1159 
Adresses #1187 

Co-authored-by: Arthur Cohen <arthur.cohen@embecosm.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/gcc/rust/resolve/rust-ast-resolve-item.h b/gcc/rust/resolve/rust-ast-resolve-item.h
index da5d4e8..e6b11f5 100644
--- a/gcc/rust/resolve/rust-ast-resolve-item.h
+++ b/gcc/rust/resolve/rust-ast-resolve-item.h
@@ -26,6 +26,7 @@
 #include "rust-ast-resolve-type.h"
 #include "rust-ast-resolve-pattern.h"
 #include "rust-ast-resolve-stmt.h"
+#include "config.h"
 
 namespace Rust {
 namespace Resolver {
@@ -81,6 +82,7 @@ public:
   void visit (AST::TraitImpl &impl_block) override;
   void visit (AST::Trait &trait) override;
   void visit (AST::ExternBlock &extern_block) override;
+  void visit (AST::UseDeclaration &) override;
 
 protected:
   void resolve_impl_item (AST::TraitImplItem *item, const CanonicalPath &prefix,
@@ -136,4 +138,13 @@ private:
 } // namespace Resolver
 } // namespace Rust
 
+#if CHECKING_P
+
+namespace selftest {
+extern void
+rust_simple_path_resolve_test (void);
+} // namespace selftest
+
+#endif // CHECKING_P
+
 #endif // RUST_AST_RESOLVE_ITEM_H