A third-party-.net-library, written in C#, offers some class “ExampleIOStuff”.
Despite an error message, it took me several hours to realize, why i am not able to create an instance of this class: (E672) Type "ExampleIoStuff" has no accessible constructors
Notice the difference? Me neither
Several classes of the library have an accompanying struct, with different case in the names - classes “IO”, structs “Io”.
Is there a way to consume this library from Oxygene without refactoring the external code?
this should work if you encase the name with Guillemet:, eg:
x := new «ExampleIOStuff»;.
between the « and », any character will be treated as part of the identifier (ie you could have socking, punctuation, you name it), and it should enforce/preserve the case too.
As a side note, I’m wondering if two classes with “the same” name should emit an “ambiguous name” error rather than picking one at random as it does now. @ck?
Thanks, this worked… Funny enough: Now it works, even if i remove the «» again…
Yesterday “Go To Type Definition” brought me to the record-interface (from metadata). Every single time! Now it jumps to the class-interface (from metadata).
It wasn’t until the examination of the library-assembly with dotPeek that I could see what the problem was.
Curious, in this testcase in just created it picks the right one for each…
namespace ConsoleApplication70;
type
Program = class
public
class method Main(args: array of String): Int32;
begin
// add your own code here
writeLn('The magic happens here.');
var f1 := new Foo;
f1.Bar;
var f2 := new foo;
f2.Bar;
end;
end;
«Foo» = public class
public
method Bar;
begin
writeLn("upper");
end;
end;
«foo» = public class
public
method Bar;
begin
writeLn("lower");
end;
end;
end.
but if the same comes from externally (ie C#), I get
var b1 := new ClassLibrary.Bar;
b1.Bar;
var b2 := new ClassLibrary.bar; // GETS AUTO_FIX - W0 Case for identifier "bar" does not match original case "Bar"
b2.Bar;
it it picks one, and even force-corrects it to that.
Broken down C#-library (MS, not RO!) to the bare minimum:
using System;
namespace TestCase
{
public struct ExampleIoStuff
{
}
public class ExampleIOStuff
{
public ExampleIOStuff(string someValue)
{
}
}
}
Trying to use it from an Oxygene project
var x := new «TestCase.ExampleIOStuff»('foo');
results in…
Fehler|(E672) Type "TestCase.ExampleIoStuff" has no accessible constructors
Warnung|(W0) Case for identifier "ExampleIOStuff" does not match original case "ExampleIoStuff"
Doesn’t work with or without the “«»”
Edit:
lol
Adding the namespace “TestCase” to “uses” and removing the namespace from the statement resolves the issue.
var x := new ExampleIOStuff('foo'); // this works now
