LLVM based parser in C++ for simpler BASIC.

Course: Compilers, Monsoon 2019
Taught by: Prof. Suresh Purini

e**.bas are example input programs to scanner. use ./scanner <input file> to run scanner.

notes

26.10.2019

• added several inbuilt qb-functions
• could not depointer string in Value
• (this is not allowed in c++ wo copy con.)
• parser does not allow x to be both Id/ Fn
• there can be unstructured goto anywhere
• using string stream makes s() convenient
• virtual function called ins for insertion
• operator overloading with ostream.
• friend function used as multiple includes
• was reusing x in parser which caused problems

27.06.2019

• ast needs transformation

30.06.2019

• how do you have line numbers or labels in lines
• how do you keep track of it
• close needs to validates es to ints and call1 close