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Project Part 2: Parser

Project Part 2: Parser. Project Part 2: Parser. Bison. Bison. Command line: bison –d translate.y. Command line: flex filename.l gcc y.tab.c lex.yy.c - lfl. Input to Bison. Input to Bison. Input to Bison. semantic actions (sequence of C statements ). Default semantic

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Project Part 2: Parser

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  1. Project Part 2: Parser

  2. Project Part 2: Parser Bison Bison Command line: bison –d translate.y Command line: flex filename.l gccy.tab.clex.yy.c -lfl

  3. Input to Bison

  4. Input to Bison

  5. Input to Bison semantic actions (sequence of C statements ) Default semantic action is $$=$1 unquoted strings not declared as tokens are taken as nonterminals $$ attribute value of production head $iattribute value of ith symbol in production body

  6. Input to Bison

  7. bison + flex • First use flex to generate yy.lex.c without mainfunction • In input to bison, put #include “yy.lex.c” in the declaration part of the file Or • Compile both c files with gcc

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