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digitalmars.D.learn - templates + operator overloading problem

reply BC <NOTmi_emayl_adrez hotmail.com.remove.not> writes:
i'm doing a lambda functions thing and I've got this

class Lambda(T)
{
    Ret2!(RHST).Ret opSub(RHST)(RHST rhs)
    {
       return Ret2!(RHST).opAdd(rhs);
    }
    Ret2!(RHST).Ret opSub_r(RHST)(RHST rhs)
    {
       return Ret2!(RHST).opAdd(rhs);
    }
}

i need to be able to accept an operand of any type on either side
(for constants in expressions)
unfortunately D says this is ambiguous and gives a compile error
whenever I subtract Lambda from Lambda. i can specialise it for the
case when it *is* Lambda, but i can't get rid of the need for a
catch all for the constants. i can't see any way around
this? is there?

BC
Dec 08 2007
parent BC <NOTmi_emayl_adrez hotmail.com.remove.not> writes:
On Sat, 08 Dec 2007 19:28:44 -0000, BC  
<NOTmi_emayl_adrez hotmail.com.remove.not> wrote:


 i'm doing a lambda functions thing and I've got this

 class Lambda(T)
 {
     Ret2!(RHST).Ret opSub(RHST)(RHST rhs)
     {
        return Ret2!(RHST).opAdd(rhs);
     }
     Ret2!(RHST).Ret opSub_r(RHST)(RHST rhs)
     {
        return Ret2!(RHST).opAdd(rhs);
     }
 }

 i need to be able to accept an operand of any type on either side
 (for constants in expressions)
 unfortunately D says this is ambiguous and gives a compile error
 whenever I subtract Lambda from Lambda. i can specialise it for the
 case when it *is* Lambda, but i can't get rid of the need for a
 catch all for the constants. i can't see any way around
 this? is there?

 BC



is it me causing these extra posts? i guess it must be. oops
Dec 08 2007