On Friday, 26 August 2016 at 18:25:00 UTC, Cauterite wrote:
Here's a little patch you guys might enjoy:
https://github.com/dlang/dmd/compare/master...Cauterite:ifExpr0
It enables this syntax:
int foo = if(asdf: 5 else 6);
equivalent to
int foo = asdf ? 5 : 6;
Here's some other examples which work:
// any number of condition/predicate pairs
foo = if(
asdf : 5,
doZxcv(bar) : 90
else 6
);
// redundant commas and colons permitted
foo = if(
a : 5,
b : 90,
else : 6,
);
// roughly equivalent to
// foo = asdf ? 5 : doZxcv(bar) ? 90 : assert(0);
foo = if(
asdf : 5,
doZxcv(bar) : 90
);
Also it doesn't conflict with if-statement syntax, as far as
I'm aware.
Just a little experiment to learn my way around the parser.
I don't think this particular syntax is desirable. We already
have ternary expressions, and anything more complicated than a
regular ternary should probably be written with a regular series
of if statements.
Having said that, it is good that you're trying to figure out how
the compiler works. Keep doing that! You might be able to open a
pull request for something else which is really valuable if you
keep tinkering.
