OpenEuphoria

Re: Programmatic use for 'type'

• Posted by Mike <vulcan at WIN.CO.NZ> Mar 01, 2000
• 438 views

OK. So my examples are not clear. Well it serves me right for simply copying
the code I was working on. I will try to explain it in generically.

When a type routine is written (and typecheck) is on then the interpereter
will call the 'type' whenever it finds a parameter with a type of the same
name, ie:

type CHAR(object x)
.. code etc..
end type

function PrintAt(CHAR c)
-- Before any code is executed in this routine the 'c' variable is sent
-- to the CHAR type
--
-- code etc
end function

Thus a routine with several parameters will be processed in the same way,
ie:

function test(CHAR c, FLOAT f, INT i)
-- A call is made to each type routine as is named
-- in the parameter list before any other execution occurs
--void=CHAR(c)
--void=FLOAT(f)
--void=INT(i)

-- normal code
end function

Therefore my idea was to convert each var_sent_to_each_type_routine within
the actual type routine and store the result in some accessible variable.
This last variable could be then sent back to the calling routine as a list
of converted elements.

At the top level a programmer could write a single line of code to convert a
sequence of data that needed it. I suppose one use would be in the situation
where some database info required conversion to a native format but where
the information is currently in text format, ie

sequence s
s={
"Brown",
"Charlie",
"555-4567",
"20.0"
"12"
"44 Eastern Park Parade",
"Hampton",
"New jersey",
"",
""
}

type STRING etc...
type FLOAT..


function convertFromDatabaseformat(
STRING firstname,
STRING lastname,
TELEPHONENUMBER phonenumber,
FLOAT weight,
INT age,
ADDR addressfirstline,
ADDR addresssecondline,
ADDR addressthirdline,
ADDR addressfourthline,
ADDR addressfifthline
)

s=convertFromDatabaseformat(
s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[8], s[9], s[10])

--s will now have the data in a native(or whateverelse) format

I hope this explains what i meant

yours truly
Mike

vulcan at win.co.nz


-----Original Message-----
From: Bernie Ryan <LockCityData at CS.COM>
To: EUPHORIA at LISTSERV.MUOHIO.EDU <EUPHORIA at LISTSERV.MUOHIO.EDU>
Date: Friday, 25 February 2000 22:36
Subject: Re: Programmatic use for 'type'


>On Fri, 25 Feb 2000 21:05:56 +1300, Mike <vulcan at WIN.CO.NZ> wrote:
>
>>Feedback is welcome.
>
>
>>-------------------------------------------------------
>>-- example 1
>>-- NMEA.e convert NMEA sentences into Euphoria sequence
>>--
>>include get.e
>>
>>with type_check -- this line must not be moved or altered
>>without warning
>>
>>object NMEASENTENCE -- this is the public variable
>
>  Mike:
>
>  I am sorry but I have no idea of what you are trying to explain.
>
>  I dont know what NMEA sentences are or what you are trying to do
>
>  in your example. It might help if you used an example that is
>
>  more generic and not so specialized. I am sure that this information
>
>  is valuable.
>
>  Thanks Bernie
>