Difference between revisions of "Bottom-Up Parsing/Exercise 13: LALR(1)"
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< Bottom-Up Parsing
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Consider the following grammar, where A is the initial symbol and '''{ x, y, z }''' is the set of terminal symbols: | Consider the following grammar, where A is the initial symbol and '''{ x, y, z }''' is the set of terminal symbols: | ||
| − | <text> | + | <source lang="text"> |
A -> A B A x | A y | z | A -> A B A x | A y | z | ||
B -> x | z B | B -> x | z B | ||
| − | </ | + | </source> |
# Compute the set of LALR(1) states for the grammar. Build the corresponding LALR(1) parse table. | # Compute the set of LALR(1) states for the grammar. Build the corresponding LALR(1) parse table. | ||
# Compact the parse table, eliminating and propagating reductions. | # Compact the parse table, eliminating and propagating reductions. | ||
Revision as of 13:27, 12 February 2019
Problema
Consider the following grammar, where A is the initial symbol and { x, y, z } is the set of terminal symbols:
A -> A B A x | A y | z
B -> x | z B
- Compute the set of LALR(1) states for the grammar. Build the corresponding LALR(1) parse table.
- Compact the parse table, eliminating and propagating reductions.
- Show the parsing process for input zzxzyx (including the actions/gotos and the input and stack states). In case of conflict, assume YACC's behavior.
Solução
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