def gen_table(file_name):
SLR1_table = {}
items_list,grammer_productions_list = getItemCollection(file_name)
gram_symbol = get_grammer_symbol(grammer_productions_list)
C_dict = get_cannonical_collection(items_list,grammer_productions_list,gram_symbol)
follow = get_follow(file_name)
non_terminals_list = []
terminals_list = []
for each_symbol in gram_symbol:
if each_symbol.istitle():
non_terminals_list.append(each_symbol)
else:
terminals_list.append(each_symbol)
terminals_list.append('#')
for each_statu in C_dict.keys():
each_statu_for_SLR1_table_key = int(each_statu.split('_')[1])
SLR1_table[each_statu_for_SLR1_table_key] = {}
for each_item in C_dict[each_statu]:
if not each_item.endswith('`'):
char_behind = each_item[each_item.index('`')+1]
for each_goto in DFA[each_statu]:
edge_end = each_goto.strip('--')
if edge_end.startswith(char_behind):
end = edge_end.split('->I_')[1]
if char_behind in terminals_list:
SLR1_table[each_statu_for_SLR1_table_key][char_behind] = 'S'+end
else:
if char_behind not in SLR1_table[each_statu_for_SLR1_table_key].keys():
SLR1_table[each_statu_for_SLR1_table_key][char_behind] = end
elif each_item.endswith('`') and each_item.split('->')[0] != non_terminals_list[0]:
left_part = each_item.split('->')[0]
if each_item.strip('`') != grammer_productions_list[0]:
for each_a in follow[left_part]:
SLR1_table[each_statu_for_SLR1_table_key][each_a] = 'r'+str(grammer_productions_list.index(each_item.strip('`')))
else:
SLR1_table[each_statu_for_SLR1_table_key]['#'] = 'acc'
return SLR1_table
from pylsy import pylsytable
if __name__ == '__main__':
file_name = raw_input('input file name which contains grammer(eg:grammer.txt):>').strip()
# file_name = 'grammer.txt'
SLR1_tabel = gen_table(file_name)
items_list,grammer_productions_list = getItemCollection(file_name)
print 'augmented grammar is:\nG\':'
for each in grammer_productions_list:
print each
non_terminals_list = []
terminals_list = []
grammer_symbol = get_grammer_symbol(grammer_productions_list)
C_dict = get_cannonical_collection(items_list,grammer_productions_list,grammer_symbol)
for each_symbol in grammer_symbol:
if each_symbol.istitle():
non_terminals_list.append(each_symbol)
else:
terminals_list.append(each_symbol)
print '==================================================='
print 'cannonical LR(0) collection:'
for key,val in C_dict.items():
print key,val
print '==================================================='
print 'DFA:'
for key,val in DFA.items():
print key,val
print '==================================================='
from pylsy import pylsytable
if __name__ == '__main__':
file_name = raw_input(
'input file name which contains grammer(eg:grammer.txt):>').strip()
# file_name = 'grammer.txt'
SLR1_tabel = gen_table(file_name)
items_list, grammer_productions_list = getItemCollection(file_name)
print 'augmented grammar is:\nG\':'
for each in grammer_productions_list:
print each
non_terminals_list = []
terminals_list = []
grammer_symbol = get_grammer_symbol(grammer_productions_list)
C_dict = get_cannonical_collection(items_list, grammer_productions_list,
grammer_symbol)
for each_symbol in grammer_symbol:
if each_symbol.istitle():
non_terminals_list.append(each_symbol)
else:
terminals_list.append(each_symbol)
print '==================================================='
print 'cannonical LR(0) collection:'
for key, val in C_dict.items():
print key, val
print '==================================================='
print 'DFA:'
for key, val in DFA.items():
print key, val
print '==================================================='