Bug 399145 - Point of declaration of template parameter

Change-Id: Ib5b192758d413ab1ac5116243ac2e4a7f7c7951c
Signed-off-by: Nathan Ridge <zeratul976@hotmail.com>
Reviewed-on: https://git.eclipse.org/r/32213
Reviewed-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>
Tested-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>

2 files changed, 38 insertions, 1 deletions

diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
index 31e3a6fa056..bf2aca54116 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
@@ -8515,4 +8515,26 @@ public class AST2TemplateTests extends AST2TestBase {
 	public void testConstexprFunctionCallWithNonConstexprArguments_429891() throws Exception {
 		parseAndCheckBindings();
 	}
+	
+	//	template <typename> class A {};
+	//	template <int>      class B {};
+	//	const int D = 4;
+	//
+	//	// Type template parameter
+	//	template <typename A = A<int>>
+	//	struct C1 {};
+	//	C1<> c1;
+	//
+	//	// Template template parameter
+	//	template <template <typename> class A = A>
+	//	struct C2 { typedef A<int> type; };
+	//	C2<>::type c2;
+	//
+	//	// Non-type template parameter
+	//	template <int D = D>
+	//	struct C3 { typedef B<D> type; };
+	//	C3<>::type c3;
+	public void testNameLookupInDefaultTemplateArgument_399145() throws Exception {
+		parseAndCheckBindings();
+	}
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
index c1b603e26c3..5b10815e7f0 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/CPPSemantics.java
@@ -1906,7 +1906,13 @@ public class CPPSemantics {
                 while (dtor.getParent() instanceof IASTDeclarator)
                     dtor = (IASTDeclarator) dtor.getParent();
                 IASTInitializer init = dtor.getInitializer();
-                if (init != null)
+            	// [basic.scope.pdecl]/p9: The point of declaration for a template parameter 
+            	// is immediately after its complete template-parameter.
+                // Note: can't just check "dtor.getParent() instanceof ICPPASTTemplateParameter"
+                // because function parameter declarations implement ICPPASTTemplateParameter too.
+                boolean isTemplateParameter = dtor.getParent() instanceof ICPPASTTemplateParameter
+                	&& dtor.getParent().getPropertyInParent() == ICPPASTTemplateDeclaration.PARAMETER;
+                if (init != null && !isTemplateParameter)
                     pointOfDecl = ((ASTNode) init).getOffset() - 1;
                 else
                     pointOfDecl = ((ASTNode) dtor).getOffset() + ((ASTNode) dtor).getLength();
@@ -1926,6 +1932,15 @@ public class CPPSemantics {
             } else if (prop == ICPPASTNamespaceAlias.ALIAS_NAME) {
             	nd = (ASTNode) nd.getParent();
             	pointOfDecl = nd.getOffset() + nd.getLength();
+            } else if (prop == ICPPASTSimpleTypeTemplateParameter.PARAMETER_NAME
+            		|| prop == ICPPASTTemplatedTypeTemplateParameter.PARAMETER_NAME) {
+            	// [basic.scope.pdecl]/p9: The point of declaration for a template parameter 
+            	// is immediately after its complete template-parameter.
+            	// Type and template template parameters are handled here;
+            	// non-type template parameters are handled in the DECLARATOR_NAME
+            	// case above.
+            	nd = (ASTNode) nd.getParent();
+            	pointOfDecl = nd.getOffset() + nd.getLength();
             } else {
                 pointOfDecl = nd.getOffset() + nd.getLength();
             }