Bottom-Up Parsing/Exercise 14: LALR(1): Difference between revisions
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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: | ||
<source lang="text"> | <source lang="text"> | ||
A | A → M z x | z M x | z x z | ||
M | M → y | ε | ||
</source> | </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. | ||
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{{CollapsedCode|Solução completa| | {{CollapsedCode|Solução completa| | ||
[[Image:Mzx1.jpg|768px]] | [[Image:Mzx1.jpg|768px]] | ||
}} | }} | ||
[[category:Compiladores]] | [[category:Compiladores]] | ||
[[category: Ensino]] | [[category: Ensino]] | ||
Latest revision as of 13:35, 11 May 2026
Problema
Consider the following grammar, where A is the initial symbol and { x, y, z } is the set of terminal symbols:
A → M z x | z M x | z x z
M → y | ε
- 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 zyx (including the actions/gotos and the input and stack states). In case of conflict, assume YACC's behavior.
Solução
Na imagem, os conflitos indicados para a regra 2 são para a regra 5.
Note-se que a solução apresentada é para SLR(1) e LALR(1) (a vermelho).
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