I would not like to see braces made optional. First, I think this reduces the
readability of the code. While readability might be somewhat subjective,
compare these two blocks of code:
// With braces // Without braces
for i in 0..<10 { for i in 0..<10
for j in 0..<5 { for j in 0..<5
if i %2 == 0 { if i %2 == 0
print(i+j) print(i+j)
} print(i*j)
print(i*j)
}
}
IMHO, it is easier to see that "print(i*j) is part of the block belonging to
the inner for loop, rather than the if statement, when braces are present.
Second, this is Python's style, which comes at a cost: the grammar is not
context free. While this type of grammar is safer, especially for programmers
with little to no experience, the imposition on veteran programmers is
constraining.
I realize that you're proposing that this be optional. However, this would
introduce a new problem. Now you have two distinctly different styles of code
out there. IMHO, this further increases the readability issue.
Cheers,
-Patrick
> On Dec 20, 2015, at 10:17 AM, Amir Michail via swift-evolution
> <[email protected]> wrote:
>
> // braces are optional here but you could still put them in if you want to
> for i in 0..<10
> for j in 0..<5
> if i % 2 == 0
> print(i+j)
> print(i*j)
>
> // braces are necessary because “print" is on the same line as ”if"
> for i in 0..<10
> for j in 0..<5
> if i % 2 == 0 { print(i+j) }
> print(i*j)
>
> // braces are necessary with incorrect/unconventional indentation
> for i in 0..<10 {
> for j in 0..<5 {
> if i % 2 == 0 {
> print(i+j)
> }
> print(i*j)
> }
> }
>
> As for the space vs tab issue, my preference would be to allow only spaces to
> make braces optional. An alternative would be to use the python 3 indentation
> rules with respect to spaces and tabs.
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