1. A computer implemented method of modifying hardware description language (HDL) statements, comprising the steps of: assigning tokens for each element of an original HDL description; implementing said original HDL description as a block diagram from mappings of said tokens to structural components; modifying said original HDL description to generate a modified HDL description; detecting elements of said modified HDL description that changed and elements of said modified HDL description that stay the same; mapping said elements that changed to said block diagram; and maintaining said elements that stayed the same.
1. A computer implemented method of modifying hardware description language (HDL) statements, comprising the steps of: assigning tokens for each element of an original HDL description; implementing said original HDL description as a block diagram from mappings of said tokens to structural components; modifying said original HDL description to generate a modified HDL description; detecting elements of said modified HDL description that changed and elements of said modified HDL description that stay the same; mapping said elements that changed to said block diagram; and maintaining said elements that stayed the same. 2. The computer implemented method of claim 1 further including the step of deleting prior mappings of tokens of said modified HDL description that have been changed.