cppRenVertex

// COM1205 Propagation Pattern for DemDraw Project.
//
// Created by Young Soo Yang (yyang@ccs.neu.edu)
//
// This propagation pattern will traverse all the vertices stored in
// a Graph object to change a name of a vertex.  It compares each vertex name
// with argument Labelname and renames one to NewLabelname by calling
// cppCompVertName() & cppSetVertName(), respectively, and it returns 1 if
// renaming done successfully, otherwise returns 0.
//
// Modification History:
//
// 11/25/95 - Young Soo Yang (yyang@ccs.neu.edu)
//	Modified to make it more structure shy
//


*operation* int cppRenVertex(char* Labelname, char* NewLabelname)
   *init* (@ 0 @)
   *traverse*
      *from* Graph
         *through* -> *,vertices,*
      *to*   Vertex

   *wrapper* Graph
      *suffix*
      (@
         this -> cppDrawVertices();
         this -> cppDrawEdges();
      @)

   *wrapper* Vertex
      (@
         if (this->cppCompVertName(Labelname)) {

	    this->cppSetVertName(NewLabelname);
	    return_val = 1;
	 }
      @)