Error says that it cant deduce function from argument types but
in reality it fails to meet function template constraints. In
this case !is(CommonType!(staticMap!(ElementType,
staticMap!(Unqual, Ranges))) == void)
In human terms it means that arguments are not the same type. Is
this require bug report or it works as expected?
Code:
void main() {
import std.range : chain;
string s = "string";
auto arrayOfStrings = ["string"];
arrayOfStrings.chain(s);
}
error:
Main.d(9): Error: template std.range.chain cannot deduce function
from argument types !()(string[], string), candidates are:
C:\D\dmd2\windows\bin\..\..\src\phobos\std\range\package.d(894):
std.range.chain(Ranges...)(Ranges rs) if (Ranges.length > 0
&& allSatisfy!(isInputRange, staticMap!(Unqual, Ranges)) &&
!is(CommonType!(staticMap!(ElementType, staticMap!(Unqual,
Ranges))) == void))
