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Purpose:
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Defines a shared-subtype class that is subject to transformations.
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Derivation:
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subtrans_object : subtype_object : ACIS_OBJECT : -
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Filename:
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kern/kernel/kernutil/subtype/subtrans.hxx
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Description:
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This class defines a shared-subtype class that is subject to transformations, and is designed to ensure that transforming several references to the same object with the same transformation retains the sharing.
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Constructor:
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protected: subtrans_object::subtrans_object
();
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C++ constructor, creating a
subtrans_object.
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protected: subtrans_object::subtrans_object
(
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subtrans_trans*,
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// transform list
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subtrans_object*
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// parent object
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);
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This constructor transforms the given parent to make a new child, and hooks up all the pointers. Constructor to be used when a linked list of extensions is made. Initially the linked list is of length 1 and parent points to itself.
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Destructor:
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protected: subtrans_object::~subtrans_object
();
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C++ destructor, deleting a
subtrans_object. Removes references in the
trans_list and also the one referring to this in the parent's list.
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Methods:
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public: void subtrans_object::clear_trans
();
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Clears any references to this object using transformation lists, before incompatible changes.
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protected: virtual subtrans_object*
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subtrans_object::copy () const = 0;
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Duplicates this object. This method is virtual so that the true derived object is copied.
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public: subtrans_object* subtrans_object::get_next
() const;
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Returns the next object in the list.
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public: subtrans_object*
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subtrans_object::make_trans (
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SPAtransf const&
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// transformation
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);
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Transforms the
subtrans_object on an external level. This method searches the transform list to find a match. It returns the corresponding transformed object if it is found; otherwise, it constructs a new transformed object, enters it into the transformation list for future reference, and returns the new object. If this object is only singly-referenced and has no transformed counterpart, then it transforms directly without copying, and "this" returns.
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protected: virtual void subtrans_object::operator*=
(
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SPAtransf const&
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// transformation
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) = 0;
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Transforms the
subtrans_object by the given transformation.
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public: void subtrans_object::set_next
(
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subtrans_object*
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// object
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);
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Sets the next object in the list.
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Internal Use:
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full_size
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