StopWatch problem

[Ali Çehreli]

On 12/05/2017 01:45 PM, Jonathan M Davis wrote:
 > On Tuesday, December 05, 2017 21:33:53 Joel via Digitalmars-d-learn 
wrote:
 >> void main() {
 >>    import std.datetime: Duration, msecs;
 >>    import std.datetime.stopwatch: StopWatch;
 >>
 >>    StopWatch sw;
 >>    if (sw.peek.msecs) {
 >>
 >>    }
 >> }
 >>
 >> I get this error with the code:
 >> z.d(6): Error: function core.time.dur!"msecs".dur (long length)
 >> is not callable using argument types (Duration)
 >
 > core.time.msecs is an alias for core.time.dur!"msecs". It takes a 
long for
 > the number of milliseconds and returns a Duration. If you want to 
convert a
 > Duration to milliseconds, then use its member function, total. e.g.
 > sw.peek.total!"msecs". It will convert the hnsecs in the duration to 
msecs
 > using integral math and return a long.
 >
 > If what you want is a floating point value like TickDuration.msecs does,
 > then you'll have to do the math yourself with something like
 > sw.peek.total!"hnsecs" / cast(real)convert!("seconds", "hnsecs")(1).
 >
 > https://dlang.org/phobos/core_time.html#.msecs
 > https://dlang.org/phobos/core_time.html#.Duration.total
 >
 > - Jonathan M Davis
 >

Selective imports complicates matters. Changing the imports lets it 
compile with 2.076:

void main() {
     import std.datetime;
     import std.stdio: writeln;

     StopWatch sw;
     writeln(sw.peek.msecs);
}

Ali