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[cdt-dev] Type promotion support?

The extract function and extract local variable refactorings don't support type promotion:

    int x = 3;
    double y = (x + 2.5) * 15;
extract -------^^^^^^^^^  
->  int x = 3;
    int foo = x + 2.5;  // foo should be a double
    double y = foo * 15;

Are there existing methods that "merge" types (IASTDeclSpecifier), finding the correct shared type?  For primitive types it's straightforward, but I'd like to avoid the bog of C++ types which override binary operators.


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