Using special argv vector in IF control flow statement returns error

[carbontwelve]

Given the following code:

DATA:
i IS NUMBER
local.min IS NUMBER
local.max IS NUMBER

PROCEDURE:
STORE 0 IN i
WHILE i IS LESS THAN argc DO
    IF i IS EQUAL TO 0 THEN
        STORE argv:i IN local.min
        STORE argv:i IN local.max
    END IF

    IF argv:i IS LESS THAN local.min THEN
        STORE argv:i IN local.min
    END IF

    IF argv:i IS GREATER THAN local.max THEN
        STORE argv:i IN local.max
    END IF

    ADD i AND 1 IN i
REPEAT
DISPLAY "Min (" local.min ") Max (" local.max ")" CRLF

I get the Error: Malformed statement error for line 14 being IF argv:i IS LESS THAN local.min THEN.

If I assign argv:i to a variable it works:

STORE argv:i IN n
IF n IS LESS THAN local.min THEN

Is this a bug or a feature?

[Lartu]

Hi there! That's the intended behavior. Argv is a TEXT vector, so you should first store the value in a NUMBER variable, thus converting it to a NUMBER, and then use it in the IF.

[carbontwelve]

Hi, thank you for your reply. I don't think that the documentation makes that clear - it may be worth amending the documentation with a note on correct usage of Argv.

[Lartu]

Hi, thank you! It's noted here: http:https://ldpl.lartu.net/reference/#cliargs. Argv is just like any other TEXT VECTOR. Is there anything in particular you think is not clear enough so I can correct it?

[carbontwelve]

If I understand you correctly the issue in my code wasn't using IF argv:i but that I was doing a NUMBER comparison on a TEXT type value therefore necessitating the STORE as a NUMBER variable in order to work on it.

That does make sense and the documentation as a whole does describe type conversion very well. I figured out the issue almost as soon as the error returned - I look forward to better errors ;)