Hello,
Sent to me, but I am forwarding it to the list because it contains a question
for everyone.
There is no global class chart, to my knowledge.
The FPC docs have a chart, but it only covers non-visual components (essentially, the FCL classes).
With fpdoc there is a tool that creates a class chart in postscript
(fpclasschart).
Michael.
---------- Forwarded message ----------
Date: Sun, 9 Nov 2014 19:45:46 +0000 (UTC)
From: Stefanos Beligiannis <[email protected]>
To: Michael Van Canneyt <[email protected]>
Subject: Re: [Lazarus] Assign not working on text files
Thank you Michael,
Thank you Bart,
The problem solved with your advice.
Another problem issued below, (I didn't mention it) with a close(f) solved also
by changing it to closefile(f)
Michael thank you because you explanation made me understand better what's in
it.
I have to study the classes carefully to develop in Lazarus and it would be
very helpful that diagram of the classes which I can't find it to download.
Any way does anybody has tried to program platforms like AutoCAD and ArcGIS
through Lazarus? As new in Lazarus I would appreciated any opinion on using dll
libraries.
Brgds
Stefanos
_______________________________________________________________________________________________________________________________________________________________________________
From: Michael Van Canneyt <[email protected]>
To: Lazarus mailing list <[email protected]>
Cc: Stefanos Beligiannis <[email protected]>
Sent: Sunday, November 9, 2014 5:50 PM
Subject: Re: [Lazarus] Assign not working on text files
On Sun, 9 Nov 2014, Bart wrote:
On 11/9/14, Stefanos Beligiannis <[email protected]> wrote:
If somebody has met this problem please advise.
----------------code var f : text;
fn,nam : string;
begin
fn:=Edit2.Caption;
{$I-}
assign(f,fn);
if (not FileExists(fn)) then Rewrite(f) else Append(f);
{$I+}----------------- end codecompiler error
report----------------- startk2u.pas(92,18) Error: Wrong number of
parameters specified for call to "Assign"k2u.pas(93,44) Hint: Local variable
"f" does not seem to be initialized----------------- end
use Lazarus # 1.2.6
Use TextFile instead of Text, use AssignFile instead of Assign.
Alternatively prepend both Text and Assign with system. (note the dot!).
Explanation:
The code most likely is inside a TForm. TForm descends from TPersistent.
TPersistent has a .Assign() method, which is totally unrelated to the Assign()
of the system unit.
When compiling your code, the compiler needs to know which Assign() to use.
It finds first the TPersistent.Assign, stops searching and gives an error
because it has different arguments from the system version.
By prepending your "text" and "assign" with system: system.text, system.assign,
the compiler does not search in TPersistent and finds the correct routines.
Michael.
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