Top-Down Parsing/Exercise 11: Test 2014/04/10

Problem

Consider the following grammar, where A is the initial symbol and {x, y, z} is the set of terminal symbols:

A → B y | x | ε
B → A x | C z
C → x | ε

1. Examine the grammar and rewrite it so that an LL(1) predictive parser can be built for the corresponding language.
2. Compute the FIRST and FOLLOW sets for all non-terminal symbols in the new grammar and build the parse table.
3. Show the analysis table (stack, input, and actions) for the parsing process of the xzyxy input sequence.

Solution

Solução completa