It would be nice to have multi optional capture

[darnellbrawner]

var x: ?u8 = null;
var y: ?i32 = null;

if(x y) |a b| {

}

Be able go handle more that one

[nonzeroq]

you can emulate this by chaining if-expressions:

if (x) |a| if (y) |b| { 

};

Though you do have to use semicolons in that case.

[zigo]

@nonzeroq

Though you do have to use semicolons in that case.

Might not later? some expressions should be statements instead · Issue #1755 · ziglang/zig · GitHub

[Sze]

Please change the topic title to something meaningful, it should tell the reader what this topic is about.

Previous related topics:

Better optionals ergonomics

we can unwrap multiple optionals using the helper function that takes a tuple and use destructuring for convenience var opt_a: ?i32 = null; var opt_b: ?f32 = 2.2; if (unwrapAll(.{ opt_a, opt_b })) |unwrapped| { var a, var b = unwrapped; std.debug.print("a = {}, b = {}\n", .{ a, b }); } else { std.debug.print("unwrap failed", .{}); } It was fun to implement it using refiy type fn UnwrappedType(comptime T: type) type { switch (@typeInfo(T)) { .Struct => |struct_info| { …

Multiple optional captures in a if statement?

So I was writing code in zig and wanted to capture multiple optionals in a if statement and run code if they both not null, but I realized that i will have to do something messy like nesting if statements, I strongly belive that this should be a feature in zig. I have two syntax in mind if (opt_a and opt_b) |a, b| {} if (opt_a, opt_b) |a, b| {}

[darnellbrawner]

Thanks didn’t know about this format. Even if it does give me the ick .

[koe]

Responding to say that I like your proposal also, a pattern ive run into wanting a few times.

[SquidBow]

Maybe we could just add so it will capture in order?

var op1: ?u8 = null;
var op2: ?i32 = null;
var boolean: bool = false;
var num = getRandomNumber(0, 100);

if(op1, boolean, num == 42, op2) |x, y| {
    ...
}