Compiler Construction PA1 Worklog
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<br>Team:
<br>Apoorva Ranade(ar6496)
<br>Sanjar Ahmadov(sa5640)
<br>Yinqi Sun(ys3540)
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<br>Indentation:
<br>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.
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<br>Challenges:
<br> 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.
<br> Handling errors was another challenge. This required debugging and small changes to program flow.
<br> Understanding the giving code was a small challenge and took some time before we could start coding.
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<br>Improvements: 
<br> Added more tests to rigorously check program flow and indentation.
<br> Function body must have atleast oone statement which is not a part of a nested function.
<br> Support for multi-line strings.