Description
Consider the extended BNF grammar for Clite, extended with function definitions, and function
calls as a statement (returning a void type) as an expression (returning a value type). We will call
this language CliteF.
Determine the new tokens added to this grammar and modify the Clite.jflex, Token.java and
TokenClass.java files accordingly to create a new lexical analyzer for CliteF.
2. Modify the ParserAST.java file to parse the new syntax. Note that Program may start with
int which could be the beginning of a function or the int main () sequence so your parser
will have to make this distinction. A similar case will arise in distinguishing the beginning of
an assignment statement from a procedure call and an identifier from a function call, as both
start with an identifier.
3. Extend the AbstractSyntaxTree class on the web to include the new features, including functionality to print their abstract syntax trees.
4. Incorporate calls to your AbstractSyntaxTree class functions in ParserAST.java to allow construction of syntax trees for the new features.
5. Test your program on the provided CliteF programs. Your output should be a syntax tree
for each program.
