Change floating-point .str() result

[benstigsen]

Let's say we have something like this:

a := 3.0
b := 4.4
println('$a + $b = ${a+b}')

What I would expect:
3.0 + 4.4 = 7.4
or
3 + 4.4 = 7.4

What the result actually is:
3. + 4.4 = 7.4

---

I think that this is not a good way to do it. I get that by printing the decimal point, it is shown the number is a float, but it looks weird to just end with a dot. I'd much rather prefer that it shows just 3, or if it has to be shown that it's a float, I'd prefer that it shows 3.0.

[vincenzopalazzo]

I agree with you, I aspect that the str method print the number in the correct format, so I would like a result 3.0 and not just 3.

[dumblob]

First of all, println() and friends seem still to not behave as expected (read "they're buggy"): #11855 (comment)

Second, the syntax above println($a + $b = ${a+b}) is obviously wrong - you probably meant println( '$a + $b = ${a+b}' ).

Third, the code outputs 3 + 4.4 = 7.4 (not 3. + 4.4 = 7.4 as in your example) with the latest V on Linux. Are you also on Linux or something else? Could you try with the latest V build?

[dumblob]

Before opening a new issue I'd like to have the existing issues solved 😉. I've now asked for reopening of #9915 in #11855 (reply in thread) .

I've now also added new comments to the already-linked PR #7692 .

If you still think we should open separate issues for all these things, let me know.

[benstigsen]

You are correct in that I forgot to put quotes.
But, I am 1000% certain that it printed 3. before. I do see now that this is not the case, but that's probably due to it having been changed within the last month or so.

[benstigsen]

Actually, doing:

a := 3.0
println(a)

Results in: 3., so it is most like the string interpolation/formatting that has been changed.

[dumblob]

Yes, that's one of the issues of println() (and friends) being special 😢 - it's a known long-standing issue. IDK if anyone is working on correcting all these bugs in println() and friends.

[benstigsen]

I have a slight feeling that println() or string interpolation in general may be overly complicated. It might be better to just assume that each variable or value in the string formatting has a .str() method on it. Making use of that, instead of doing conversions in the string interpolation code it self, since the code is quite big to say the least. This would also make it so that instead of printing the value different when doing:

a := 3.0
println(a) // 3.
println('$a') // 3

Both would result in the same if they just try to call the a.str() method instead.