When a variable name is used as a type, emit a warning, not an error

compiler/javatests/com/google/dart/compiler/type/TypeAnalyzerCompilerTest.java

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 package com.google.dart.compiler.type;
 
 import com.google.common.base.Joiner;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.dart.compiler.CommandLineOptions.CompilerOptions;
@@ skipping 1471 matching lines @@
             "interface I {",
             "  foo([x,y]);",
             "}",
             "class C implements I {",
             "  foo([x]) {}",
             "}");
     assertErrors(
         result.getErrors(),
         errEx(ResolverErrorCode.CANNOT_OVERRIDE_METHOD_NAMED_PARAMS, 5, 3, 3));
   }
-  
+
   public void test_metadataOverride_OK_method() throws Exception {
     AnalyzeLibraryResult result = analyzeLibrary(
         "// filler filler filler filler filler filler filler filler filler filler",
         "class A {",
         "  foo() {}",
         "}",
         "class B extends A {",
         "  // @override",
         "  foo() {}",
         "}",
         "");
     assertErrors(result.getErrors());
   }
-  
+
   public void test_metadataOverride_Bad_method() throws Exception {
     AnalyzeLibraryResult result = analyzeLibrary(
         "// filler filler filler filler filler filler filler filler filler filler",
         "class A {",
         "}",
         "class B extends A {",
         "  // @override",
         "  foo() {}",
         "}",
         "");
@@ skipping 52 matching lines @@
             "}",
             "class B {",
             "         get field() => 0;",
             "  static set field(var v) {}",
             "}",
             "");
     assertErrors(result.getErrors(),
         errEx(ResolverErrorCode.FIELD_GETTER_SETTER_SAME_STATIC, 4, 14, 5),
         errEx(ResolverErrorCode.FIELD_GETTER_SETTER_SAME_STATIC, 8, 14, 5));
   }
-  
+
   /**
    * <p>
    * http://code.google.com/p/dart/issues/detail?id=380
    */
   public void test_setterGetterDifferentType() throws Exception {
     AnalyzeLibraryResult result =
         analyzeLibrary(
             "// filler filler filler filler filler filler filler filler filler filler",
             "class A {} ",
             "class B extends A {}",
@@ skipping 1317 matching lines @@
         "}",
         "class C extends A implements Interface<int> {",
         "  int m() => 0;",
         "}");
     assertErrors(
         libraryResult.getErrors(),
         errEx(TypeErrorCode.CANNOT_OVERRIDE_METHOD_NOT_SUBTYPE, 8, 7, 1),
         errEx(TypeErrorCode.INCOMPATIBLE_TYPES_IN_HIERARCHY, 7, 7, 1));
   }
 
+  public void test_variableUsedAsType() throws Exception {
+    AnalyzeLibraryResult libraryResult = analyzeLibrary(
+        "// filler filler filler filler filler filler filler filler filler filler",
+        "var func;",
+        "func i;");
+    assertErrors(
+        libraryResult.getErrors(),
+        errEx(TypeErrorCode.NOT_A_TYPE, 3, 1, 4));
+  }
+
   private static <T extends DartNode> T findNode(
       AnalyzeLibraryResult libraryResult,
       final Class<T> clazz,
       String pattern) {
     final int index = libraryResult.source.indexOf(pattern);
     assertTrue(index != -1);
     final AtomicReference<T> result = new AtomicReference<T>();
     Iterator<DartUnit> unitsIterator = libraryResult.getLibraryUnitResult().getUnits().iterator();
     unitsIterator.next();
     DartUnit unit = unitsIterator.next();
     unit.accept(new ASTVisitor<Void>() {
       @Override
       @SuppressWarnings("unchecked")
       public Void visitNode(DartNode node) {
         SourceInfo sourceInfo = node.getSourceInfo();
         if (sourceInfo.getOffset() <= index
             && index < sourceInfo.getEnd()
             && clazz.isInstance(node)) {
           result.set((T) node);
         }
         return super.visitNode(node);
       }
     });
     return result.get();
   }
 }