Looking for a specialized Diff tool

[KevinHall]

Does anyone know if a diff tool exists that will display the class/struct definition or function prototype if something changes:

For Example --

File Version1:

#ifndef CLASS_A_H
#define CLASS_A_H
Class A
{
    int dummy1;
};
#endif

File Version2:

#ifndef CLASS_A_H
#define CLASS_A_H
Class A
{
    int dummy1;
    int dummy2;
};
#endif

Most diff tools will report that a line was inserted in version 2 of the file and report where and what that line was.

What I'm looking for is something like the following so it will be more readable:

***OldFile.h***

Class A
{
    int dummy1;
};

***NewFile.h***

Class A
{
    int dummy1;
    int dummy2;
};

Thanks,

- Kevin