GN: Don't allow nested things inside template invocations.

tools/gn/functions.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TOOLS_GN_FUNCTIONS_H_
 #define TOOLS_GN_FUNCTIONS_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 417 matching lines @@
 // toolchain, and the given name.
 Label MakeLabelForScope(const Scope* scope,
                         const FunctionCallNode* function,
                         const std::string& name);
 
 // Some tyesp of blocks can't be nested inside other ones. For such cases,
 // instantiate this object upon entering the block and Enter() will fail if
 // there is already another non-nestable block on the stack.
 class NonNestableBlock {
  public:
-  enum Type {

[Bons, 2015/09/26 11:13:34]

yay dead code removal!

-    CONFIG,
-    DECLARE_ARGS,
-    TARGET,
-    TEMPLATE,
-    TOOLCHAIN,
-  };
-
   // type_description is a string that will be used in error messages
   // describing the type of the block, for example, "template" or "config".
   NonNestableBlock(Scope* scope,
                    const FunctionCallNode* function,
                    const char* type_description);
   ~NonNestableBlock();
 
   bool Enter(Err* err);
 
  private:
   // Used as a void* key for the Scope to track our property. The actual value
   // is never used.
   static const int kKey;
 
   Scope* scope_;
   const FunctionCallNode* function_;
   const char* type_description_;
 
   // Set to true when the key is added to the scope so we don't try to
   // delete nonexistant keys which will cause assertions.
   bool key_added_;
 };
 
 #endif  // TOOLS_GN_FUNCTIONS_H_