Bug 380141 - Support for Extended Friend Declarations

Syntactic recognition of extended friend declarations. Approach is to
allow declarations to have no declarator if they are named type
specifiers and have friend as a declaration specifier.

Change-Id: Id49afaadc4fd8b1cd10b398977ca6db252a9e799

2 files changed, 30 insertions, 0 deletions

diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
index 0c40d13..7465d5d 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
@@ -11,6 +11,7 @@
  *     Markus Schorn (Wind River Systems)
  *     Andrew Ferguson (Symbian)
  *     Sergey Prigogin (Google)
+ *     Thomas Corbat (IFS)
  *******************************************************************************/
 package org.eclipse.cdt.core.parser.tests.ast2;
 
@@ -9742,4 +9743,29 @@ public class AST2CPPTests extends AST2BaseTest {
 		assertEquals(1, declarations.length);
 		assertEquals(bh.findName("S", 1), declarations[0]);
 	}
+
+	// struct F {};
+	// struct S {
+	//     friend F;
+	// };
+	public void testFriendClass() throws Exception {
+		parseAndCheckBindings();
+	}
+
+	// struct F {};
+	// typedef F T;
+	// struct S {
+	//     friend T;
+	// };
+	public void testFriendTypedef() throws Exception {
+		parseAndCheckBindings();
+	}
+
+	// template<typename P>
+	// struct T {
+	//     friend P;
+	// };
+	public void testFriendTemplateParameter() throws Exception {
+		parseAndCheckBindings();
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
index 93f1881..0f2834e 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/GNUCPPSourceParser.java
@@ -13,6 +13,7 @@
  *     Mike Kucera (IBM)
  *     Andrew Ferguson (Symbian)
  *     Sergey Prigogin (Google)
+ *     Thomas Corbat (IFS)
  *******************************************************************************/
 package org.eclipse.cdt.internal.core.dom.parser.cpp;
 
@@ -2323,6 +2324,9 @@ public class GNUCPPSourceParser extends AbstractGNUSourceCodeParser {
 	protected boolean isLegalWithoutDtor(IASTDeclSpecifier declSpec) {
 		if (declSpec instanceof IASTElaboratedTypeSpecifier) {
 			return ((IASTElaboratedTypeSpecifier) declSpec).getKind() != IASTElaboratedTypeSpecifier.k_enum;
+		} else if (declSpec instanceof ICPPASTNamedTypeSpecifier &&
+				((ICPPASTNamedTypeSpecifier) declSpec).isFriend()) {
+			return true;
 		}
 		return super.isLegalWithoutDtor(declSpec);
 	}