def parseCommand():
current = Parser.tokens.actual
if current.type == "VARIABLE":
var = n.Identifier(current.value)
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ASSIGNMENT":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.value == "readline":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "OPEN":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "CLOSE":
Parser.tokens.selectNext()
nRead = n.ReadLine()
node = n.Assignment("ASSIGNMENT", [var, nRead])
current = Parser.tokens.actual
else:
raise Exception(
"Queria CLOSE, recebeu {}".format(current.type))
else:
raise Exception(
"Queria OPEN, recebeu {}".format(current.type))
else:
exp = Parser.parseRelExpression()
node = n.Assignment("ASSIGNMENT", [var, exp])
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
return node
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
else:
raise Exception(
"Queria ASSIGNMENT, recebeu {}".format(current.type))
elif current.type == "RESERVED":
if current.value == "println":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "OPEN":
Parser.tokens.selectNext()
exp = Parser.parseRelExpression()
node = n.Println("PRINT", [exp])
current = Parser.tokens.actual
if current.type == "CLOSE":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
return node
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
else:
raise Exception(
"Queria CLOSE, recebeu {}".format(current.type))
else:
raise Exception(
"Queria OPEN, recebeu {}".format(current.type))
elif current.value == "if":
Parser.tokens.selectNext()
relExp = Parser.parseRelExpression()
nodeIf = n.If("IF", [relExp])
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
blockIf = Parser.parseBlock()
nodeIf.children.append(blockIf)
current = Parser.tokens.actual
listElseIf = []
if current.value == "elseif":
while current.value == "elseif":
Parser.tokens.selectNext()
relExp = Parser.parseRelExpression()
nodeElseIf = n.If("ELSEIF", [relExp])
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
blockElseIf = Parser.parseBlock()
nodeElseIf.children.append(blockElseIf)
listElseIf.append(nodeElseIf)
current = Parser.tokens.actual
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
if current.value == "else":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
blockElse = Parser.parseBlock()
listElseIf[-1].children.append(blockElse)
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
elseIfRange = range(1,len(listElseIf))
elseIfRange = reversed(elseIfRange)
for i in elseIfRange:
listElseIf[i-1].children.append(listElseIf[i])
nodeIf.children.append(listElseIf[0])
elif current.value == "else":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
blockElse = Parser.parseBlock()
nodeIf.children.append(blockElse)
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
current = Parser.tokens.actual
if current.value == "end":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
return nodeIf
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
else:
raise Exception(
"Queria end, recebeu {}".format(current.value))
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
elif current.value == "while":
Parser.tokens.selectNext()
relExp = Parser.parseRelExpression()
node = n.While("WHILE", [relExp])
current = Parser.tokens.actual
if (current.type == "ENDLINE"):
Parser.tokens.selectNext()
blockWhile = Parser.parseBlock()
node.children.append(blockWhile)
current = Parser.tokens.actual
if current.value == "end":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
return node
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.type))
else:
raise Exception(
"Queria end, recebeu {}".format(current.type))
else:
raise Exception(
"Queria ENDLINE, recebeu {}".format(current.value))
elif current.value == "local":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "VARIABLE":
var = n.Identifier(current.value)
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "DECLARE":
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "TYPE":
varType = n.Type(current.value)
node = n.DeclareVar("DECVAR", [var, varType])
Parser.tokens.selectNext()
current = Parser.tokens.actual
if current.type == "ENDLINE":
Parser.tokens.selectNext()
return node
elif (current.type == "ENDLINE"):
Parser.tokens.selectNext()
return n.NoOp()
else:
raise Exception(
"Queria ENDLINE - final, recebeu {}".format(current.type))
