From a5310137645f1173c70d98e0ce5733cca9e032b6 Mon Sep 17 00:00:00 2001
From: Andrej Mitrovic <andrej.mitrovich@gmail.com>
Date: Tue, 11 Feb 2014 13:22:37 +0100
Subject: [PATCH] Add linkage attribute parsing support to alias declarations.

---
 stdx/d/ast.d    |  3 ++-
 stdx/d/parser.d | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/stdx/d/ast.d b/stdx/d/ast.d
index 7dd5e26..b3b4b71 100644
--- a/stdx/d/ast.d
+++ b/stdx/d/ast.d
@@ -346,8 +346,9 @@ class AliasDeclaration : ASTNode
 public:
     override void accept(ASTVisitor visitor)
     {
-        mixin (visitIfNotNull!(type, name, initializers));
+        mixin (visitIfNotNull!(linkageAttribute, type, name, initializers));
     }
+    /** */ LinkageAttribute linkageAttribute;
     /** */ Type type;
     /** */ Token name;
     /** */ AliasInitializer[] initializers;
diff --git a/stdx/d/parser.d b/stdx/d/parser.d
index ea93afc..0993a1f 100644
--- a/stdx/d/parser.d
+++ b/stdx/d/parser.d
@@ -70,7 +70,7 @@ class Parser
      *
      * $(GRAMMAR $(RULEDEF aliasDeclaration):
      *       $(LITERAL 'alias') $(RULE aliasInitializer) $(LPAREN)$(LITERAL ',') $(RULE aliasInitializer)$(RPAREN)* $(LITERAL ';')
-     *     | $(LITERAL 'alias') $(RULE type) $(LITERAL identifier) $(LITERAL ';')
+     *     | $(LITERAL 'alias') $(RULE linkageAttribute)? $(RULE type) $(LITERAL identifier) $(LITERAL ';')
      *     ;)
      */
     AliasDeclaration parseAliasDeclaration()
@@ -78,6 +78,18 @@ class Parser
         mixin(traceEnterAndExit!(__FUNCTION__));
         auto node = new AliasDeclaration;
         if (expect(tok!"alias") is null) return null;
+
+        // 'alias extern(C) void function() f;' => supported in DMD and DScanner.
+        // 'alias f = extern(C) void function();' => not supported in both DMD and DScanner. See D Bugzilla 10471.
+        // 'alias extern void function() f;' => supported in DMD, not supported in DScanner since it's a storage class.
+        if (currentIs(tok!"extern"))
+        {
+            if (!peekIs(tok!"("))
+                error(`"(" expected for the linkage attribute`);
+
+            node.linkageAttribute = parseLinkageAttribute();
+        }
+
         if (startsWith(tok!"identifier", tok!"="))
         {
             do