import std.string;
import std.stdio;

// OK
unittest {
    string foo = " foo ";
    writeln(foo.strip);
}

/* Not OK

strip.d(21): Error: template std.algorithm.strip does not match any function template declaration. Candidates are:
/usr/share/dmd/src/phobos/std/algorithm.d(7122):        std.algorithm.strip(Range, E)(Range range, E element) if (isBidirectionalRange!Range && is(typeof(range.front == element) : bool))
/usr/share/dmd/src/phobos/std/algorithm.d(7129):        std.algorithm.strip(alias pred, Range)(Range range) if (isBidirectionalRange!Range && is(typeof(pred(range.back)) : bool))
strip.d(21): Error: template std.algorithm.strip(Range, E)(Range range, E element) if (isBidirectionalRange!Range && is(typeof(range.front == element) : bool)) cannot deduce template function from argument types !()(string)

*/
unittest {
    import std.algorithm;
    string bar = " bar ";
    writeln(bar.strip);
}

/* if I move "import std.algorithm;" outside of the unittest, it works fine. */