In summary, Definite Clause Grammars (DCGs) offer a convenient approach for processing strings/expressions by combining pattern matching with regular Prolog code. They enable constructing complex structures while parsing input data. In this example, DCGs were utilized to parse mathematical expressions into Abstract Syntax Trees (AST). Additionally, compound terms in Prolog serve as natural representations of AST nodes. Finally, expression simplification rules can be easily defined for various optimization tasks such as derivative calculation within the same language framework. Overall, Prolog’s capabilities make it suitable for tackling problems like this one involving string manipulation and mathematical operations on expressions.
Complete Article after the Jump: Here!