Assume the following enum:
enum Operation {
Multiply(left : Int, right : Int);
}
Enum matching can be performed as follows:
var result = switch(Multiply(1, 3)) {
case Multiply(_, 0):
0;
case Multiply(0, _):
0;
case Multiply(l, r):
l * r;
}
Ref...
Assume the following structure:
var dog = {
name : "Woofer",
age : 7
};
Enum matching can be performed as follows:
var message = switch(dog) {
case { name : "Woofer" }:
"I know you, Woofer!";
case _:
"I don't know you, so...
var result = switch([1, 6]) {
case [2, _]:
"0";
case [_, 6]:
"1";
case []:
"2";
case [_, _, _]:
"3";
case _:
"4";
}
References
"Array matching", Haxe manual
The | operator can be used anywhere within patterns to describe multiple accepted patterns. If there is a captured variable in an or-pattern, it must appear in both its sub-patterns.
var match = switch(7) {
case 4 | 1: "0";
case 6 | 7: "1";
case _: "2";
...
It is also possible to further restrict patterns with guards. These are defined by the case ... if(condition): syntax.
var myArray = [7, 6];
var s = switch(myArray) {
case [a, b] if (b > a):
b + ">" +a;
case [a, b]:
b + "<=" +a;
case _:...
Extractors are identified by the extractorExpression => match expression. Extractors consist of two parts, which are separated by the => operator.
The left side can be any expression, where all occurrences of underscore _ are replaced with the currently matched value.
The right side is a p...
