Bug 15139 – allow foreach over Range*

We should allow foreach over pointers to range types, or alternatively change std.range.isInputRange to disallow pointers to range types. Currently we have this: alias Range = Repeat!int; static assert(isInputRange!(Range*)); //but static assert(!isIterable!(typeof(a)*)); //because static assert(!__traits(compiles, { foreach(_; &a){} })); so just because you checked whether something is an input range, doesn't mean you can actually use foreach over it. One way or another, resolving this would deal with https://issues.dlang.org/show_bug.cgi?id=11779 and https://issues.dlang.org/show_bug.cgi?id=15096 Note that pointers to ranges can't pass hasSlicing or IsRandomAccessRange because of course the indexing would be all wrong.

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