1.2 KiB
Compiler Construction PA1 Worklog
Team:
Apoorva Ranade(ar6496)
Sanjar Ahmadov(sa5640)
Yinqi Sun(ys3540)
Indentation:
A stack is maintained by the lexer to keep track of indentations. A count is accumulated for the number of whitespace characters before the first token. If the count changes from the previous line count, a stack operation is performed. If count increases, another value is added to the stack. If count decreases, the topmost value is popped from the stack.
Challenges:
Shift-reduce errors while parsing the grammar. One approach to fix is to change the grammar. We chose to fix this issue by adding a precedence as in the case of expr by adding right precedence for if and else.
Handling errors was another challenge. This required debugging and small changes to program flow.
Understanding the giving code was a small challenge and took some time before we could start coding.
Improvements:
Added more tests to rigorously check program flow and indentation.
Function body must have atleast oone statement which is not a part of a nested function.
Support for multi-line strings.