jianwang-mpi / plytype

Python lexer and yacc with type

plytype

This repo is based on the ply: http://www.dabeaz.com/ply/ply.html

install

This package can be used only under the python3

sudo pip3 install plytype

usage

please refer to the ply website for basic usage firstly: http://www.dabeaz.com/ply/ply.html

python lexer and yacc with type: you can get type and set type to any token This can help the definition of grammar

Get token type:

def p_testlist(t):
  '''testlist : test
              | test testlist'''
  print(t.get_type(1))

you will get the type of the token at position 1(test), the result is :

test

Set token type:

def p_testlist(t):
  '''testlist : test
              | test testlist'''
  print(t.set_type(0, "test"))

By using the set type function, you can set the type of the token at position 0: testlist, to test