From dfd7a7164cbcc042dc4f88276622d7f93f26812f Mon Sep 17 00:00:00 2001
From: Nathan Ridge <zeratul976@hotmail.com>
Date: Thu, 7 Sep 2017 01:23:06 -0400
Subject: [PATCH] Bug 521817 - Implement PDOMCPPAliasTemplate.update()

This ensures that if the target type of an alias template changes,
the target type is updated in the index during an incremental index
update, without requiring a full index rebuild.

Change-Id: I8800e3c1701409276f8db64000499a5fa9caf6a9
---
 .../core/pdom/dom/cpp/PDOMCPPAliasTemplate.java  | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPAliasTemplate.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPAliasTemplate.java
index 9443c989ef2..8a4607d8ff1 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPAliasTemplate.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/dom/cpp/PDOMCPPAliasTemplate.java
@@ -14,6 +14,8 @@ package org.eclipse.cdt.internal.core.pdom.dom.cpp;
 
 import org.eclipse.cdt.core.CCorePlugin;
 import org.eclipse.cdt.core.dom.ast.DOMException;
+import org.eclipse.cdt.core.dom.ast.IASTNode;
+import org.eclipse.cdt.core.dom.ast.IBinding;
 import org.eclipse.cdt.core.dom.ast.IType;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPAliasTemplate;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateNonTypeParameter;
@@ -22,6 +24,7 @@ import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateTemplateParameter;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateTypeParameter;
 import org.eclipse.cdt.internal.core.index.IIndexCPPBindingConstants;
 import org.eclipse.cdt.internal.core.pdom.db.Database;
+import org.eclipse.cdt.internal.core.pdom.dom.PDOMLinkage;
 import org.eclipse.cdt.internal.core.pdom.dom.PDOMNode;
 import org.eclipse.core.runtime.CoreException;
 
@@ -55,12 +58,25 @@ class PDOMCPPAliasTemplate extends PDOMCPPBinding implements ICPPAliasTemplate,
 	}
 
 	public void initData(IType aliasedType) {
+		storeAliasedType(aliasedType);
+	}
+	
+	private void storeAliasedType(IType aliasedType) {
 		try {
 			getLinkage().storeType(record + ALIASED_TYPE, aliasedType);
 		} catch (CoreException e) {
 			CCorePlugin.log(e);
 		}
 	}
+	
+	@Override
+	public void update(PDOMLinkage linkage, IBinding newBinding, IASTNode point) throws CoreException {
+		if (!(newBinding instanceof ICPPAliasTemplate)) {
+			return;
+		}
+		
+		storeAliasedType(((ICPPAliasTemplate) newBinding).getType());
+	}
 
 	@Override
 	public int getNodeType() {