Difference between revisions of "Top-Down Parsing/Exercise 6"
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Consider the following grammar, where '''<tt>F</tt>''' is the initial symbol and '''<tt>{a,b,c,d,e}</tt>''' is the set of terminal symbols: | Consider the following grammar, where '''<tt>F</tt>''' is the initial symbol and '''<tt>{a,b,c,d,e}</tt>''' is the set of terminal symbols: | ||
| − | |||
O -> a | O -> a | ||
G -> F c | O c d | (eps) | G -> F c | O c d | (eps) | ||
| + | F -> G b | O c F e | ||
# Examine the grammar and rewrite it so that an LL(1) predictive parser can be built for the corresponding language. | # Examine the grammar and rewrite it so that an LL(1) predictive parser can be built for the corresponding language. | ||
Revision as of 15:32, 17 March 2017
Contents |
Problem
Consider the following grammar, where F is the initial symbol and {a,b,c,d,e} is the set of terminal symbols:
O -> a G -> F c | O c d | (eps) F -> G b | O c F e
- Examine the grammar and rewrite it so that an LL(1) predictive parser can be built for the corresponding language.
- Compute the FIRST and FOLLOW sets for all non-terminal symbols in the new grammar and build the parse table.
- Show the analysis table (stack, input, and actions) for the parsing process of the acbe input sequence.
Solution
