Using PLY with RPython (FORTH-like VM)

RPython_FORTH.py

src = '''
nop
nop
.
1 2 3
.
bye
'''

D = [] # data stack
R = [] # return stack

# parser

import ply.lex  as lex
import ply.yacc as yacc

tokens = ['SYM','DOT']

t_ignore = ' \t\r'
def t_newline(t):
	r'\n'
	t.lexer.lineno += 1

def t_DOT(t):
	'\.'
	return t
def t_SYM(t):
	'[a-zA-Z0-9_]+'
	return t

def p_REPL_none(p): ' REPL : '
def p_REPL_recur(p):
	' REPL : REPL ex '
#	print p[2]

def p_SYM(p):
	' ex : SYM '
	D.append(p[1])
def p_DOT(p):
	' ex : DOT '
	print D

def t_error(t): print 'lexer/error',t
def p_error(p): print 'parse/error',p

def main(argv):
	lex.lex()
	yacc.yacc(debug=False,write_tables=False).parse(src)
	return 0

def target(*args): return main,None

import sys
if __name__ == '__main__':
	main(sys.argv)