def scan(self, pif: PIF, sym_table_identifiers: SymbolTable, sym_table_constants):
global GLOBAL_ID
f = open(self.file_path)
number = 0
while True:
line = f.readline()
if not line:
break
line = line[:-1]
tokens = self.detect_tokens(line)
print(tokens)
for tok in tokens:
if self.is_reserved_word_or_operator(tok):
pif = self.genPif(tok, 0, pif)
elif self.is_identifier(tok):
id = sym_table_identifiers.add_value(tok).id
pif = self.genPif(tok, id, pif)
elif self.is_numerical_constant(tok) or self.is_string_constant(tok) or self.is_boolean_constant(tok):
id = sym_table_constants.add_value(tok).id
pif = self.genPif(tok, id, pif)
else:
raise ValueError('lexical error at line: ' + str(number) + ' from token: ' + tok)
number+=1
# if the function returns without any error, it means that the program is lexically correct
return pif, sym_table_identifiers, sym_table_constants
