Branching

Syntax#

• if (condition) { … }
• if (condition) { … } else { … }
• if (condition) { … } else if (condition) { … } else { … }
• // Braces are optional for single line statements
  if (condition) … else if (condition) … else …
• switch (expression) { case pattern: … default: … }
• condition ? expression if true : expression if false;

Remarks#

All branching expressions make it possible to return evaluated expressions. This means branching results can be assigned to variables. In this case, all expressions that can be evaluated by a successful condition test must pass type unification. If no else expression is given, the type is inferred to be Void.

If / else if / else

if (a > b) {
    trace("You win!");
} else if (a == b) {
    trace("It's a draw!");
} else {
    trace("You lose!");
}

// Assigning the evaluated expression to a variable
var message =  if (a > b) {
    "You win!";
} else if (a == b) {
    "It's a draw!";
} else {
    "You lose!";
}
trace(message);   

Reference

• “If”, Haxe manual

Ternary operator

n % 2 == 0 ? trace("n is even!") : trace("n is odd!");

// Assigning the evaluated expression to a variable
var message = n % 2 == 0 ? "n is even!" : "n is odd!";
trace(message);

Reference

• “If”, Haxe manual

Switch

switch (n % 2) {
    case 0: trace("n is even!");
    case 1: trace("n is odd!");
    default: trace("I don't know!");
}

// Assigning the evaluated expression to a variable
var message = switch (n % 2) {
    case 0: "n is even!";
    case 1: "n is odd!";
    default: "I don't know!";
}
trace(message);

Note that case body expressions never fall through, so using the break expression in this context isn’t supported by Haxe.

Reference:

• “Switch”, Haxe manual