return type of user command

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question

Alessio Merlo asked Feb 21 2017 at 8:43 AM Phil BoBo edited Feb 21 2017 at 6:33 PM

return type of user command

Hi,

does somebody help me with a compiler error? I am updating an old model to the last version of Flexsim (17.0.2), but I surprised when the compiler console return some error due to return type of my user command.

I can't attach the model, but I replicated the issue in a simple model. I created an user command "sum" which return an "int" value ("double" is the same). When I use the command and I save the return value in an int variables, the compiler returns an error with this reason "Command sum does not return the required type". Why?

I can fix the problem changing the return type of command in num or variant or saving the return value in a variant, but I don't understand the reason of this change. Sometimes I would like to force the return type with a specifc type.

Does somebody help me to understand what is changed in FlexSim 17.0.2?

Thanks in advance.

Software Version:

FlexSim 17.0.2

user commands compiler return type

parsererror.png (49.3 KiB)

Answer 1 · 2017-02-21T17:16:00Z

Matt Long answered Feb 21 2017 at 5:16 PM Phil BoBo edited Feb 21 2017 at 6:33 PM

Valid return types currently (for 17.0) are:

node
obj
string
str
num
int
double
var
array

(You can also leave return type empty if returning nothing)

It looks like there is a bug with using int. In the mean time use num instead.

· 2

Alessio Merlo commented · Feb 21 2017 at 5:48 PM

Hi Matt,

probably I don't understand your answer, for this reason I attached the model.

I created a command which return an int, but the compiler gives me an error if I save the return value in a int variable. Do you confirm?

1 ·

parseerror.fsm (12.5 KiB)

Phil BoBo ♦♦ Alessio Merlo commented · Feb 21 2017 at 6:03 PM

The Return Type field has never accepted "int" or "double" as valid options. You should use "num" instead.

In previous versions, it displayed a warning: "Warning line 1 Invalid type for assignment operation on val. Expecting type num. Type is none."

In 17.0, that warning is now a compile error instead of a warning, as the compiler is more strict in proper typing now.

I'll add a note to the dev list to either fix the documentation or change it so that it accepts "int" and "double" as valid Return Types.

1 ·

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