The action is read from a table containing all syntactically valid combinations of stack and lookahead symbols. I created a table for you to better explain some of the actions Grammar Assign = Sums id ← Sums Sums + Products ← Sums Products ← Products Products * Value ← Products Value ← Value int ← Value id ← BUT, the parser wants the BIGGEST match possible for RHS in Stack so it might wait until something doesn’t match this works only if 2 or more productions START with the same symbol like <Value> and <Assign>, both start with “id” in many references, this is not mentioned A LR(1) Shift Reduce Example again must be given a Grammar and Input String use LR Shift Reduce Parser Table please use overall exercise table given broken up into, step, parse stack, look ahead, etc… Example Grammar and Input for LR(1) Shift Reduce Parser Grammar Input String Assign = Sums id = id + id * int $ id ← Sums Sums + Products ← Sums Products ← Products Products * Value ← Products Value ←
The action is read from a table containing all syntactically valid combinations of stack and lookahead symbols. I created a table for you to better explain some of the actions Grammar Assign ← id = Sums Sums ← Sums + Products Sums ← Products Products ← Products * Value Products ← Value Value ← int Value ← id BUT, the parser wants the BIGGEST match possible for RHS in Stack so it might wait until something doesn’t match this works only if 2 or more productions START with the same symbol like <Value> and <Assign>, both start with “id” in many references, this is not mentioned A LR(1) Shift Reduce Example again must be given a Grammar and Input String use LR Shift Reduce Parser Table please use overall exercise table given broken up into, step, parse stack, look ahead, etc… Example Grammar and Input for LR(1) Shift Reduce Parser Grammar Input String Assign ← id = Sums Sums ← Sums + Products Sums ← Products Products ← Products * Value Products ← Value id = id + id * int $
Parsing.docx