class ParseHandler(object):
def __init__(self):
self.ast = None
self.exps = []
def shift(self, token):
print(colorful('移近 {0} {1}'.format(token[0], token[1]), "Cyan"))
def reduce(self, grammar):
"""
规约动作, grammar为规约用的产身世
"""
print('利用规则' + colorful('%s -> %s' % (grammar[0], ' '.join(grammar[1])), "Green"))
# from util import colorful
lex = Lex()
lex.keyword = ['lambda', '[', ']', 'let', 'define', 'if', 'cond', 'or', 'and', '(', ')']
lex.read_lex('regular_lex.txt')
lex.compile(grammar_type="regular")
print(colorful('词法编译完成...', 'Yellow'))
parser = LRParser()
parser.read_grammar('schepy_grammar.txt')
parser.compile()
print(colorful('语法编译完成...', 'Yellow'))
parser.show_dfa()
while True:
parser.parse(lex.lex(raw_input(), ignore=["limit"]), ParseHandler())
readline.parse_and_bind("tab: complete")
import crash_on_ipy
crash_on_ipy.init()
from lex import Lex
from parser import LRParser
from util import colorful
from runtime import ParseHandler, Env
LEX = Lex()
LEX.keyword = ['lambda', '[', ']', 'let', 'define', 'if',
'cond', 'or', 'and', '(', ')', '$T', '$F']
LEX.read_lex('regular_lex.txt')
LEX.compile(grammar_type="regular")
# lex.read_lex('regex_lex.txt')
# lex.compile()
print(colorful('词法编译完成...', 'Yellow'))
PARSER = LRParser()
PARSER.read_grammar('schepy_grammar.txt')
PARSER.compile()
print(colorful('语法编译完成...', 'Yellow'))
GLOBAL_ENV = Env.std_env()
while True:
try:
HANDLER = ParseHandler()
EXP = raw_input(colorful('schepy => ', 'Cyan'))
PARSER.parse(LEX.lex(EXP, ignore=["limit"]), HANDLER)
print(';VALUE: ' +
colorful(repr(HANDLER.ast.calc_value(env=GLOBAL_ENV)), "Magenta"))
