Re: Lua 5.3: wrong coercion?

[Enrico Colombini <erix@...>]

On 16/01/2015 21.49, Roberto Ierusalimschy wrote:
> You are missing the last sentence that you quoted!  "Then, the resulting
> number is converted to the required type (float or integer) according
> to the previous rules." The "required type" in this case is a float, as
> explained in the rule for addition (Section 3.4.1):
>
>    [...] the arithmetic operators work as follows: If both operands are
>    integers, the operation is performed over integers and the result is an
>    integer. Otherwise, if both operands are numbers or strings that can be
>    converted to numbers (see §3.4.3), then they are converted to floats,
>    [...]

Unary minus seems to behave the same way, which is coherent but not 
especially intuitive:

> "3"
3

> "-3"
-3

> -"3"
-3.0

I confess I had had no time to touch Lua in the past months (which is a 
pity) but I get the impression that the added efficiency and usefulness 
(at least for embedded systems) of the integer/float dualism may have 
come at some cost on the simplicity side, especially for unskilled users 
such as (some) game scripters and CS learners.
Maybe I only need to approach it the right way.

That said, I welcome Lua 5.3 :-)

P.S. Just compiled it with :
- Code::Blocks (mingw32-gcc) under 32-bit Windows XP.
- Xubuntu 32-bit (3.13.0-43-generic) with libreadline-dev.
No problems.

--
  Enrico