Hi everyone,
I've been using Haml & Sass for a while now and, after a small
learning curve, both have simplified my life quite a bit. Especially
useful is Sass's ability to calculate on the fly. One way I use this
is by setting my base font size in px as a Sass constant and later in
my stylesheets divide various other pixel values (e.g. the width of a
logo) by the base font size in order to get an em value out of it.
There is one big problem with this in the current Sass implementation:
Floats! Consider the following:
(a) :height = (7/14)+em => parses as height: 0
(b) :height = (7.0/14.0)+em => parses as height: 0.5em
(c) !a = 7.0
!b = 14.0
:height = (!a/!b)+em => parses as height: 0
While I would say that (a) and (b) can reasonably be expected, (c), in
my eyes, breaks the logic.
The implementation in question is to be found in
Sass::Constant::Number#to_s. Here, Sass *mathematically* decides
whether a given value is a float or an integer instead of accepting
how it had been *programatically* defined. Meaning that while
mathematically 14.0 is indeed an integer (14.0 % 1 == 0.0), if I, the
programmer, write it as 14.0 I usually did so specifically to have it
handled as a float.
Am I correct to assume that Sass performs the conversion to integers
purely in order to clean up its output? If so I would suggest simply
killing line lib/sass/constant/number.rb:60 since the "eyecandy"
upside of having 14 instead of 14.0 in the output does not seem to
justify any elaborate checks.
Additionally I would even welcome having all arithmetic operations
result in floats. In my eyes 7/14 should always result in 0.5.
However, there probably is a good reason why Sass does behave
differently? I must insist though that Sass should respect my choice
to use floats if it is as explicit as writing 7.0.
Best,
Niels.
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