DelayFormat now works with alignment and width

[SamokhinIlya]

Fix #233

[quodlibetor]

Thanks!

Could you add a couple of tests that demonstrate the behavior and correctness?

[SamokhinIlya]

Sure. Also I have question about try! macro in format function. Is it used there intentionally or just hasn't been updated to question mark operator? If it's the latter, can I replace it?

[quodlibetor]

Thanks! As you noticed, chrono still supports ancient rust that doesn't have the question mark operator.

These new tests are confusing, in them you're creating a string without alignment, and then aligning that string, which isn't related to the chrono formatting.

This does match my expectation of what would happen, since I don't think of the chrono formatter as knowing about padding.

[SamokhinIlya]

These new tests are confusing, in them you're creating a string without alignment, and then aligning that string, which isn't related to the chrono formatting.

Do you mean it'll be better to inline it like this?

assert_eq!("  2007 January 02", format!("{:>17}", ymd));
assert_eq!("2007 January 02  ", format!("{:<17}", ymd));
assert_eq!(" 2007 January 02 ", format!("{:^17}", ymd));

[quodlibetor]

Oh darn, I misunderstood what the code was doing. I saw:

        let percent = datetime.format("%%");

as

        let percent: String = datetime.format("%%");

but it's actually

       let percent: ::format::DelayedFormat<_> = datetime.format("%%");

That makes me pretty happy with this, thanks!