Non- Recursive Decent Parser, LL(1) parser example, LL(1) parsing algorithm.
18 February, 2016
A non recursive predictive parser can be built by maintaining a stack explicitly rather than implicitly via recursive call.
LL(1) grammar used for constructing the grammar. First "L" stands for scanning the input from left to right , the second "L" for
producing a left most derivation , and "1" for using one input symbol of lookahead at each step to make parsing action decisions.
LL(1) grammar used for constructing the grammar. First "L" stands for scanning the input from left to right , the second "L" for
producing a left most derivation , and "1" for using one input symbol of lookahead at each step to make parsing action decisions.
Simple Way to understand the problem::
- Push and pop the element from stack.
- Pop the top of the stack & increment the input pointer.
- If X is nonterminal then we use parsing table M{X,a}.
- If M[X,a] = x->uvw then replace x by uvw in the reverse order.
- If M[X,a] = blank means ERROR.
In this example , we try to explain how a simple single string is passed by Predictive parser..
Que: Consider E->TE'
T->+TE'/empty
T->FT'
T'->*FT'/empty
F-> (id)|(E)
Solve this question??
