[Issue 18101] New: allow Tuple for BetterC

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18101

          Issue ID: 18101
           Summary: allow Tuple for BetterC
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: changlon at gmail.com

=============== code ===============
import std.typecons : Tuple;

alias BOMSeq = Tuple!(int, "schema");

extern(C) int main(){
        return 0;
}
=========================

../src/phobos/std/range/primitives.d(405): Error: static assert  "Cannot put a
const(char)[] into a Appender!string."
../../src/phobos/std/format.d(1172):        instantiated from here:
put!(Appender!string, const(char)[])
./../src/phobos/std/format.d(473):        instantiated from here:
writeUpToNextSpec!(Appender!string)
../../src/phobos/std/format.d(5831):        instantiated from here:
formattedWrite!(Appender!string, char, ulong, ulong)
../../src/phobos/std/typecons.d(542):        instantiated from here:
format!(char, ulong, ulong)
test.d(4):        instantiated from here: Tuple!(int, "schema")

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