Bmm_Lexer_Parser

Summary

This project aims to build a compiler for a simple programming language called B--. It utilizes Flex and Bison to create a lexical analyzer and syntax analyzer capable of recognizing B-- source code. The compiler provides helpful error messages for identifying syntax errors in B-- sample code.

File Structure

.
├── README.md
├── bmm_parser.y
├── bmm_scanner.l
├── correct_sample.bmm
├── incorrect_sample.bmm

Prerequisites

Download

• Bison
• Flex
• Make

Assumptions

• \n is not considered as a space but as a character
• all other assumptions are intuitive

How to run ?

• Enter following commands into terminal

  lex BMM_Scanner.l
  yacc -d BMM_Parser.y
  cc lex.yy.c y.tab.c -o Compiler    
  ./.Compiler<CorrectSample.bmm
  ./.Compiler<IncorrectSample.bmm
  

BMM_Scanner.l

• Tokenized all the variable names, keywords, special characters and numbers.
• It will print all the tokens in the terminal in the the orser scanned.

BMM_Parser.y

• This program contains the BNF grammar rules for the compiler.
• If there is any error in syntax it will stop parsing after prompting error message "Syntax Error".
• If there is no syntax error all the scanning and parsing will be printed in terminal and Success message will be prompted in the end.

CorrectSample.bmm

• Contains correct code free from any kind of syntax errors.

IncorrectSample.bmm

• Contains syntax error in line 180 (contains PRIN instead of PRINT)

Authors

• Prashant Singh (@prashant531)
• Aditya Patil (@Nerditya)