ENH: Create automatic policy push/pop helper

This creates cmMakefile::PolicyPushPop to push and pop policy scope
automatically.  It also enforces balanced push/pop pairs inside the
scope it handles.

1 files changed, 12 insertions, 0 deletions

diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index 4daec16..fb1e1e1 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -346,6 +346,18 @@ public:
   bool SetPolicyVersion(const char *version);
   //@}
 
+  /** Helper class to push and pop policies automatically.  */
+  class PolicyPushPop
+  {
+  public:
+    PolicyPushPop(cmMakefile* m);
+    ~PolicyPushPop();
+  private:
+    cmMakefile* Makefile;
+    size_t PolicyDepth;
+  };
+  friend class PolicyPushPop;
+
   /**
     * Get the Policies Instance
     */