Feature Request: Show generic class parameters for Errors with
generics
lazarus / 64-FPC development

----------------------------------------------------------------------
soerensen3 · 2017-11-05 22:49

I'm using generics a lot and one problem I am always facing is one
cannot tell which specialization caused an error. I better explain it
with some example code:
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i type 
generic gTestGeneric < T > = class ( TObject )    SomeField: T;   
procedure CreateField;  end; TTestObj1 = class( TObject )  constructor
Create( abc: String );end; TTestObj2 = class( TObject )  constructor
Craete( abc: String ); // Some typoend; TTestGeneric1 = specialize
gTestGeneric <TTestObj1>;TTestGeneric2 = specialize gTestGeneric
<TTestObj2>; implementation procedure gTestGeneric.CreateField;begin 
SomeField:= T.Create( 'abc' ); // Error here without telling which
specialization caused the problem (In this case TTestObj2)end;... This
is only an example to show that sometimes errors are only caused for
some specialization and there is no way to tell from the error message
which specialization is causing it. Would it be very complicated to
implement in the compiler? What do you think?