digitalmars.D.learn - Default argument for template tuple function parameter
- Vladimir Panteleev (7/7) Sep 06 2011 AddressInfo[] getAddressInfo(T...)(string node, string service = null, T...
- Timon Gehr (10/12) Sep 06 2011 TypeTuple!() emptyTuple;
- Vladimir Panteleev (8/14) Sep 06 2011 Thanks, I tried this at first as well, but was turned off by having to
AddressInfo[] getAddressInfo(T...)(string node, string service = null, T options) DMD complains: "default argument expected for options". What's the syntax for an empty tuple? -- Best regards, Vladimir mailto:vladimir thecybershadow.net
Sep 06 2011
On 09/06/2011 01:01 PM, Vladimir Panteleev wrote:AddressInfo[] getAddressInfo(T...)(string node, string service = null, T options)TypeTuple!() emptyTuple; AddressInfo[] getAddressInfo(T...)(string node, string service = null, T options=emptyTuple) {} Error: cannot implicitly convert expression (tuple()) of type () to () And this smells like a compiler bug. Workaround: AddressInfo[] getAddressInfo()(string node){return getAddressInfo(node,cast(string)null);} AddressInfo[] getAddressInfo(T...)(string node, string service, T options);
Sep 06 2011
On Tue, 06 Sep 2011 14:37:55 +0300, Timon Gehr <timon.gehr gmx.ch> wrote:Workaround: AddressInfo[] getAddressInfo()(string node){return getAddressInfo(node,cast(string)null);} AddressInfo[] getAddressInfo(T...)(string node, string service, T options);Thanks, I tried this at first as well, but was turned off by having to cast null to string. In the end I just made the string parameter part of the variadic tuple.And this smells like a compiler bug.Posted http://d.puremagic.com/issues/show_bug.cgi?id=6613. -- Best regards, Vladimir mailto:vladimir thecybershadow.net
Sep 06 2011