def lexic_analyzer(self):
with open(self.file) as f:
symbolTable = SymbolTable()
pif = ProgramInternalForm()
s = Scanner()
lineNo = 0
wasMinusBehind = False
for line in f:
lineNo += 1
for token in s.tokenGenerator(line[0:-1], separators):
# this is the proffessors algorith on the Lecture
if token == " ":
continue
if token in separators + operators + reservedWords:
if token != "-":
wasMinusBehind = False
if token == "-":
wasMinusBehind = True
pif.add(codification[token], -1)
elif isIdentifier(token):
if wasMinusBehind:
token = "-" + token
else:
wasMinusBehind = False
id = symbolTable.addIdentifier(token)
pif.add(codification['identifier'], id)
elif isConstant(token):
if wasMinusBehind:
token = "-" + token
else:
wasMinusBehind = False
id = symbolTable.addConstants(token)
pif.add(codification['constant'], id)
else:
raise VCompilerIllegalCharacterUsedError(
'Unknown token ' + token + ' at line ' +
str(lineNo))
print('Program Internal Form: \n', pif)
print('Symbol Table: \n', symbolTable)
print('\n\nCodification table: ')
for e in codification:
print(e, " -> ", codification[e])
