def main():
# 新建词法分析器
lexical = Lexical()
# 载入源代码
lexical.load_source(open('3.txt', encoding="utf-8").read())
# 执行词法分析
lexical_success = lexical.execute()
# 将结果保存在tokens文件中
with open('lexical_result.txt', 'w+') as f:
lexical_result = lexical.get_result()
for i in lexical_result:
f.write(i.type + '\t' + i.str + '\t' + str(i.line) + '\n')
# 打印结果
print('词法分析是否成功:\t', lexical_success)
if lexical_success:
# lexical_result = lexical.get_result()
print()
print('词法分析结果:')
for i in lexical_result:
print(i.type, i.str, i.line)
print()
else:
print('错误原因:\t', lexical.get_error().info)
# 语法分析
parser = Parser()
parser.open('grammar1211.txt') # 语法规则保存的地方
parser.make_first()
parser.make_follow()
parser.make_pretable()
table = list()
if not parser.iserror:
_flag = True
for key1 in parser.pretable.keys():
if _flag:
table.append(list(parser.pretable[key1]))
_flag = False
table.append(list(parser.pretable[key1].values()))
else:
print("\33[不是LL1文法")
# 保存ll(1)预测表
if os.path.exists('LL(1).txt'):
os.remove('LL(1).txt')
with open("LL(1).txt", 'a+') as f:
f.write("\t")
for i in list(parser.pretable.keys()):
f.write(str(i) + "\t")
f.write("\n")
for i in range(0, len(table[0])):
for array in table:
if str(array[i]) == "error":
f.write("\t")
else:
f.write(str(array[i]) + "\t")
f.write("\n")
# 语义分析
map_list = list()
input_str = ''
map_line = list()
with open('lexical_result.txt') as f:
for line in f.readlines():
line = line[:-1].split('\t')
if line[0]:
input_str += line[0]
map_list.append(line[1])
map_line.append(line[2])
p = Pro()
# input str 标识符 map-lsit 字符 map-line 行数
p.createSymbolList(input_str, map_list, map_line)
# 语义分析得到chart 符号表 temp_list 临时变量表 seq_list四元式表
p.analysis('LL(1).txt') # 生成的的ll1规则表LL(1)
# 将结果保存在tokens文件中
with open('lexical_result.txt', 'w+') as f:
lexical_result = lexical.get_result()
for i in lexical_result:
f.write(i.type + '\t' + i.str + '\t' + str(i.line) + '\n') #
# 打印结果
print('词法分析是否成功:\t', lexical_success)
if lexical_success:
# lexical_result = lexical.get_result()
print()
print('词法分析结果:')
for i in lexical_result:
print(i.type, i.str, i.line)
print()
else:
print('错误原因:\t', lexical.get_error().info)
map_list = list()
input_str = ''
map_line = list()
with open('lexical_result.txt') as f:
for line in f.readlines():
line = line[:-1].split('\t')
if line[0]:
input_str += line[0]
map_list.append(line[1])
map_line.append(line[2])
print('input_str:', input_str)
print('map list:', map_list)
print('map_line:', map_line)