Hi
I basically have the same problem as in
http://www.codeplex.com/IronPython/WorkItem/View.aspx?WorkItemId=939
A struct like:
public struct Test
{
public float a;
public Test(float a)
{
this.a = a;
}
public static Test operator *(float lscalar, Test test)
{
return new Test(lscalar * test.a);
}
public static Test mul(float lscalar, Test test)
{
return new Test(lscalar* test.a);
}
public override string ToString()
{
return "Test("+a+")";
}
}
If I execute in IronPython:
6 * Test(1.7)
<Test object at 0x000000000000002F [Test(10.2)]>
Test.mul(6.5, Test(1.7))
<Test object at 0x0000000000000030 [Test(11.05)]>
6.5 * Test(1.7)
unsupported operand type(s) for *: 'float' and 'Test'
at _stub_$695##312(Closure , CallSite , CodeContext , Double , Object )
at _stub_MatchCaller(Object , CallSite , Object[] )
at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
at
Microsoft.Scripting.Actions.UpdateDelegates.Update3[T,T0,T1,T2,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2)
at Initialize$694##311(Closure , CodeContext )
at Microsoft.Scripting.ScriptCode.Run(CodeContext context)
at Microsoft.Scripting.ScriptCode.Run(Scope scope)
at Microsoft.Scripting.SourceUnit.Execute(Scope scope, ErrorSink errorSink)
at Microsoft.Scripting.Hosting.ScriptSource.Execute(ScriptScope scope) [...]
TypeError: unsupported operand type(s) for *: 'float' and 'Test'
The comment in the issue quoted above says that the exception is by design,
since the operator is only defined for a float. And indeed,
System.Single(6.5) * Test(1.7)
<Test object at 0x0000000000000031 [Test(11.05)]>
works just fine.
What I don't understand is why there should be a difference in implicit
conversion of python numbers depending on if it's used in a constructor,
a function or an operator. Is there a reason for that?
Cheers,
Korbinian
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