COMPILER CONSTRUCTION Principles and practice Kenneth C. louden
COMPILER CONSTRUCTION Principles and Practice Kenneth C. Louden
5. Bottom-Up Parsing PART TWO
5. Bottom-Up Parsing PART TWO
Contents PART ONE 5. 1 Overview of Bottom-Up Parsing 5.2 Finite Automata ofLR(O) Items and Lr(O) Parsing PART TWO 5.3 SLR(1 Parsing MoreI 5.4 General lr(1) and lalr(1 Parsing more] 5.5 Yacc: An Lalr(I) Parser Generator[More 5.6 Generation of a TINY Parser Using Yacc 5.7 Error Recovery in Bottom-Up Parsers More
Contents PART ONE 5.1 Overview of Bottom-Up Parsing 5.2 Finite Automata of LR(0) Items and LR(0) Parsing PART TWO 5.3 SLR(1) Parsing[More] 5.4 General LR(1) and LALR(1) Parsing [More] 5.5 Yacc: An LALR(1) Parser Generator[More] 5.6 Generation of a TINY Parser Using Yacc 5.7 Error Recovery in Bottom-Up Parsers[More]
LR(O Items of A grammar A"→A A→(A)a This grammar has eight items: A"→A A→A A→(A A→(A) A→(A) A→→(A) A A
LR(0) Items of A Grammar A' → A A → (A)|a This grammar has eight items: A' → ·A A' → A· A → ·(A) A → (·A) A → (A·) A → (A)· A → ·a A → a·
DFA and the lr(o Parsing of The grammar: A(A)a A Parsing stack input Action 1|$0 ((a))$shift 2|$0(3 a))$ shift 3s0(3(3 a )s shift 4|$0(3(3a2 )s| reduce a→a 5|$0(3(3A4 ))S shift $0(3(3A4)5 (A) 7$0(3A s shift 8|$0(3A4)5 reduce $0A1
DFA and the LR(0) Parsing of The grammar: A → ( A ) | a A’ →·A A →·(A) A →·a 0 A A’ →A· 1 A → a· 2 A →(·A) A →·(A) A →·a 3 A a A →(A)· 5 ) ( ( a A →(A·) 4 1 2 3 4 5 6 7 8 9 Parsing stack input Action $ 0 $ 0 ( 3 $ 0 ( 3 ( 3 $ 0 ( 3 ( 3 a 2 $ 0 ( 3 ( 3 A 4 $ 0 ( 3 ( 3 A 4 ) 5 $ 0 ( 3 A 4 $ 0 ( 3 A 4 ) 5 $ 0 A 1 ( (a) )$ ( a) )$ a )$ ) )$ ) )$ )$ )$ $ $ shift shift shift reduce A→a shift reduce A→(A) shift reduce A→(A) accept