Optional vs Required Parentheses in Control Flow

[msadeqhe]

Functions require parentheses. Control flows can have optional parentheses while braces are required:

// Optional Parentheses          | // Required Parentheses
if value < 10 {                  | if (value < 10) {
    //statements...              |     //statements...
}                                | }
else if value == 10 {            | else if (value == 10) {
    //statements...              |     //statements...
}                                | }
                                 |
for (var n: i32) in numbers {    | for (var n: i32 in numbers) {
    //statements...              |     //statements...
}                                | }
                                 |
while i < 10 {                   | while (i < 10) {
    //statements...              |     //statements...
    ++i;                         |     ++i;
}                                | }

Comparing these two alternative syntaxes...

[jonmeow]

Leads evaluated optional parentheses as part of #623. Rationale for requiring parentheses may be found in that proposal.

As a general note regarding polls, bear in mind that there's a relatively small number of people active in design discussions, but a very large target pool of developers. This GitHub forum doesn't provide a representative vote from developers, so polls will have [very low accuracy and] very limited influence on decisions. Providing objective data or new information will typically be a better way to shift a decision.