flex-bison python compiler

compiler for python made using lex yacc / GNU's flex bison.

The current version of this code supports defining a function, defining a class, calling a function, various types of expressions, assignment statements, and if conditions, in addition to loops such as for and while and some other structures such as try, match, yield, global, nonlocal, return, break, continue, INDENT \ DEDENT analysis using stack

How to make

You will need flex, bison, and gcc installed on your machine

To change sh script permission:

$ chmod +x build.sh clear.sh

To build:

$ ./build.sh
compiled: compiler, parser.tab.c, parser.tab.h, lex.yy.c

To run:

$ ./compiler test.py

To clear:

$ ./clear.sh

Explaining the operating steps without using the build file

This program is run using the following commands:

bison -d parser.y 

• This instruction produces two files:
  • parser.tab.h : We use this to include it inside the flex file to read the token
  • parser.tab.c : We use this file to make a compiler with the resulting flex file

flex pycompile.l 

• This instruction produces lex.yy.c file: We use this file to make a compiler with the resulting bison file(parser.tab.c)

Finally, to compile flex and bixon, we write this command:

 gcc -o <program file name> parser.tab.c lex.yy.c

• This produces .exe file

Note : The stack file is included in order to deal with indentation in a file pycompile.l test file is : test py

but now is ready to execution ^_____^

Authors

• @fadel-hasan

License