ast: More visitors to allow lang item paths in expressions

gcc/rust/ChangeLog:

	* ast/rust-ast-collector.cc (TokenCollector::visit): Adapt visitor to lang item
	PathInExpressions.
	* ast/rust-ast-visitor.cc (DefaultASTVisitor::visit): Likewise.
	* expand/rust-cfg-strip.cc (CfgStrip::visit): Likewise.
	* expand/rust-expand-visitor.cc (ExpandVisitor::visit): Likewise.
	* hir/rust-ast-lower.cc (ASTLoweringExprWithBlock::visit): Likewise.
	(ASTLowerPathInExpression::visit): Likewise.
	* resolve/rust-ast-resolve-path.cc (ResolvePath::resolve_path): Likewise.
	* resolve/rust-early-name-resolver.cc (EarlyNameResolver::visit): Likewise.

2 files changed, 11 insertions, 6 deletions

diff --git a/gcc/rust/expand/rust-cfg-strip.cc b/gcc/rust/expand/rust-cfg-strip.cc
index 33fb64f..e2cc68b 100644
--- a/gcc/rust/expand/rust-cfg-strip.cc
+++ b/gcc/rust/expand/rust-cfg-strip.cc
@@ -19,6 +19,7 @@
 #include "rust-cfg-strip.h"
 #include "rust-ast-full.h"
 #include "rust-ast-visitor.h"
+#include "rust-path.h"
 #include "rust-session-manager.h"
 #include "rust-attribute-values.h"
 
@@ -434,10 +435,13 @@ CfgStrip::visit (AST::PathInExpression &path)
       return;
     }
 
-  for (auto &segment : path.get_segments ())
+  if (!path.is_lang_item ())
     {
-      if (segment.has_generic_args ())
-	maybe_strip_generic_args (segment.get_generic_args ());
+      for (auto &segment : path.get_segments ())
+	{
+	  if (segment.has_generic_args ())
+	    maybe_strip_generic_args (segment.get_generic_args ());
+	}
     }
 }
 
diff --git a/gcc/rust/expand/rust-expand-visitor.cc b/gcc/rust/expand/rust-expand-visitor.cc
index e40597e..1e85ed7 100644
--- a/gcc/rust/expand/rust-expand-visitor.cc
+++ b/gcc/rust/expand/rust-expand-visitor.cc
@@ -477,9 +477,10 @@ ExpandVisitor::visit (AST::MacroInvocation &macro_invoc)
 void
 ExpandVisitor::visit (AST::PathInExpression &path)
 {
-  for (auto &segment : path.get_segments ())
-    if (segment.has_generic_args ())
-      expand_generic_args (segment.get_generic_args ());
+  if (!path.is_lang_item ())
+    for (auto &segment : path.get_segments ())
+      if (segment.has_generic_args ())
+	expand_generic_args (segment.get_generic_args ());
 }
 
 void