def funDecl():
expr = Expr(ExprType.FUNCTION, nextToken())
if not matchesToken(TokenType.IDENTIFIER):
raise ParseException(
"Expected fucntion identifier, found {0}".format(peekToken().text),
peekToken())
expr.value = consume(TokenType.IDENTIFIER).text
expr.left = parameters()
expr.right = block()
expr.eval = evalFunc
return expr
def primary():
result = Expr()
if matchesToken(TokenType.LEFT_PAREN):
result.type = ExprType.GROUPING
result.token = nextToken()
result.right = addition()
result.eval = evalGrouping
if not matchesToken(TokenType.RIGHT_PAREN):
raise ParseException(
"Expecting ')', found {0}".format(peekToken().text),
peekToken())
else:
nextToken()
elif matchesToken(TokenType.IDENTIFIER):
result.type = ExprType.IDENTIFIER
result.eval = evalVariableGet
result.token = nextToken()
else:
result.type = ExprType.LITERAL
result.eval = evalLiteral
result.token = peekToken()
if matchesToken(TokenType.FALSE):
result.value = False
result.dataType = DataType.BOOLEAN
elif matchesToken(TokenType.TRUE):
result.value = True
result.dataType = DataType.BOOLEAN
elif matchesToken(TokenType.NIL):
result.value = None
result.dataType = DataType.NIL
elif matchesToken(TokenType.STRING):
result.value = result.token.text
result.dataType = DataType.STRING
elif matchesToken(TokenType.NUMBER):
if result.token.text.find(".") > -1:
result.value = float(result.token.text)
result.dataType = DataType.DOUBLE
else:
result.value = int(result.token.text)
result.dataType = DataType.INTEGER
nextToken()
return result