On Thu, 8 Oct 2015, Sven Barth wrote:
Am 08.10.2015 19:10 schrieb "Ralf Quint" <freedos...@gmail.com>:
On 10/8/2015 9:54 AM, Sven Barth wrote:
I had the idea to implement inline-if as well. I think the syntax I
selected is derived from Oxygene, but it looks very Pascal and shouldn't
break anything:
left := if expr1 then expr2 else expr3;
Thereby expr1 returns Boolean and expr2 determines the type of the whole
inline-if, thus expr3 needs to be compatible to expr2.
Sorry, but that doesn't "look Pascal" at all, and is anything but easily
understandable, specially given the possible complexity of expr[1,2,3]...
And you think C's ternary would be more Pascal? Also you need /some/
definition of what defines the type no whether what syntax you choose (in
addition expr1 is the same as in normal ifs, so it's only the "complexity"
of expr2 and expr3). And no, "the left side" is not the Pascal answer
either.
Actually, yes I think C's or Javascript's ternary is better suited.
Let me explain. If I see
If expr1 then expr2 else expr3
it says 'statement' to me. But
a ? b : c;
Says "expression" to me.
So
left := a ? b : c;
looks more 'right' than the 'if then else', because the right-hand side is
clearly an expression.
The "if expr1 then expr2 else expr3" is equally counter-intuitive and confusing
as anonymous functions.
Keyword "If" starts a statement. If you allow to use it in expressions, its meaning becomes context sensitive.
That is a bad thing in my book.
So if this thing needs to be implemented, then I'd much prefer it in the
ternary form.
Michael.
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