idea-Direct.txt

The idea for the Direct method is to build the syntac tree. From that we will find the firstpos, lastpos and followpos. This followpos will help in finding the states - the optimized number of states that are in the resulting DFA. 

For building syntax tree, basic operations of a tree is needed - this is provided by the BTree.java functionality. BTree is helpful in genraating the tree nodes. 

confusion on nullable --- 
->>>>>  has 5 ctegories -  1. leaf : false
                            2. non-leaf :
                                        a. E node(epsilon) - true
                                        b. concat - nullable(c1) & nullable(c2)
                                        c. or - nullable(c1) | nullable(c2)
                            3. '*' node - true



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until now
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