Bug: Ambiguous call to overloaded method

van_den_Bergh · August 21, 2019, 3:37pm

Funny:

with:

uses
System,
System.Collections.Generic,
System.Web,
System.Text;

method CorrectIsoDate(const Datum : System.String; var Jahr: System.String) : System.String; public;

implementation

method CorrectIsoDate(const Datum : System.String; var Jahr: System.String) : System.String;
begin
result := String.Empty;
Jahr := String.Empty;

if not String.IsNullOrEmpty(Datum) then begin
var splitdate := Datum.split(’-’);
if (splitdate.Length = 3) then begin
Jahr := splitdate[0];
var Monat := splitdate[1];
var Tag := splitdate[2];
if (Tag = ‘00’) and (Monat = ‘00’) then begin
Tag := ‘30’;
Monat := ‘06’;
end
else begin
if (Tag = ‘00’) then
Tag := ‘15’;
if (Monat = ‘00’) then
Monat := ‘06’;
end;
exit Jahr + ‘-’ + Monat + ‘-’ + Tag;
end;
end;
end;

Webapplication, .NET Version 4.5.2, Oxygene 10.0.0.2425

Theo69 · August 21, 2019, 3:42pm

I just had exactly the same error with the following line of code (Cirrus):
if aMethod.Language = Language.Oxygene then

Note: aMethod is of type IMethodDefinition

van_den_Bergh · August 21, 2019, 4:24pm

Hi Theo,

could you resolve it?

Cheers
Marcus

Theo69 · August 21, 2019, 5:16pm

No - was not a big issue, so I didn’t use it.
Your topic was just before I would have made one.

mh · August 21, 2019, 8:47pm

Hmm,. so there’s only one CorrectIsoDate, but it still gives ambiguous overload? Are there any additional messages? can we get a complete test case?

i pasted this into a new project and it compiles clean after fixing broken quit chars and adding the top/bottom

namespace foo;

interface

uses
  System,
System.Collections.Generic,
System.Web,
System.Text;

method CorrectIsoDate(const Datum : System.String; var Jahr: System.String) : System.String; public;

implementation

method CorrectIsoDate(const Datum : System.String; var Jahr: System.String) : System.String;
begin
result := String.Empty;
Jahr := String.Empty;

if not String.IsNullOrEmpty(Datum) then begin
var splitdate := Datum.split('-');
if (splitdate.Length = 3) then begin
Jahr := splitdate[0];
var Monat := splitdate[1];
var Tag := splitdate[2];
if (Tag = '00') and (Monat = '00') then begin
Tag := '30';
Monat := '06';
end
else begin
if (Tag = '00') then
Tag := '15';
if (Monat = '00') then
Monat := '06';
end;
exit Jahr + '-' + Monat + '-' + Tag;
end;
end;
end;

end.

Theo69 · August 21, 2019, 8:56pm

In an aspect implementation, when I use
if aMethod.Language = Language.Oxygene then

I get the same error on aMethod.Language, and I did not program the call as it is in Cirrus.

mh · August 21, 2019, 9:50pm

an actually complete project or code file that compiles (well, except for the error) would really be helpful, coz otherwise I’m just guessing and throwing random code snippets at the compiler in a (usually futile) attempt to reproduce…

van_den_Bergh · August 22, 2019, 8:55am

Hmmm…,
its a very complex project with many nugets installed plus databases involved.

ck · August 22, 2019, 10:24am

Can you extract the methods you call, and the call to it? There’s probably more than 1 CorrectIsoDate, and the types of the parameters involved should allow is to reproduce this issue. (the body of the methods can be empty)

van_den_Bergh · August 22, 2019, 10:54am

No mere than one CorrectIsoDate I renamed it a couple of times with same result.

At the time being it is impossible to help you:

Every 2 Minutes I have to restart VS 2015 as it is not working any more (in all my projects)

van_den_Bergh · August 22, 2019, 11:04am

Seems to be a namespace problem:

method foo(const Beginn: string);
begin
var jahr : String;
var anfang := ODSRestService.GlobalObjects.CorrectIsoDate(Beginn, var jahr);
end;

With:

method foo(const Beginn: string);
begin
var jahr : String;
var anfang := CorrectIsoDate(Beginn, var jahr);
end;

it works (with foo in theGlobalObjects.pas (1.1 KB) same unit)

van_den_Bergh · August 22, 2019, 11:07am

Even with changing the namespace to foo it does not work from other unit:

ck · August 22, 2019, 11:15am

WebApplication15.zip (7.5 KB)

this works:

what am I missing?

van_den_Bergh · August 22, 2019, 11:17am

Cannot work like that, it hangs again:

van_den_Bergh · August 22, 2019, 11:19am

Try to call the method from another unit or even from method foo with full workspace before method call.

Cannot show it as my VS hangs again.

ck · August 22, 2019, 11:21am

Do you have steps for the hangs? (you’re using latest right?)

van_den_Bergh · August 22, 2019, 4:35pm

Yepp, using 31. New class in new .pas file.
When changing or adding code it hangs up and PC starts noisy cooling.
Happens especially after mistyping.

mh · August 22, 2019, 5:54pm

Any chance you could attach a second copy of Visual Studio as debugger and see if you can get a call stack on what it is stuck on? Does it hang indefinitely, or is it just slow (ie recovers after a few (or many) seconds)?

thanx,
marc

van_den_Bergh · August 23, 2019, 8:05am

Hi Marc,

sometimes slow (Qeue is busy) sometimes hanging indefinitely.
I am for two weeks in holiday now without PC
So I am coming back to you if I encounter this problem after my holidays again.
Thanks for your good support

mh · August 23, 2019, 12:07pm

Logged bugs://83138 for Theo’s test case, but I dont expect its going to be related tho this one.