Enum Extractor

This library provides sugar syntax to access Enum value for one pattern and do nothing for other patterns.

Usage

You should implement EnumExtractor to be able to use this.

This code ([...] means optionnal):

@as(variable => pattern [, [@if] conditionnal]) {
	// code executed if variable matches pattern
}

Will generate:

switch(variable) {
	case pattern [if(conditionnal)]:
		// code
	default:
}

Exemples

If you have an enum like:

enum A {
    Value(v:Int);
    Value2(v1:Int, v2:Int);
}

You can use the extractor like this:

class Main implements EnumExtractor {
    static function main() {
		var a:A = Value(5);
		@as(a => Value(v)) {
			trace(v); // Traces 5
		}

		a = Value2(5, 10);
		@as(a => Value(v) | Value2(_, v)) {
			trace(v); // Traces 10
		}

		// You can also use it on multiple values
		@as(a => Value2(v1, v2)) {
			trace(v1 + v2); // Traces 15
		}

		// You can use the optional second argument to have a guard on it
		@as(a => Value2(v1, v2), v1 > 6) {
			trace(v1 + v2); // Will not trace anything because v1 = 5 <= 6
		}

		// You can use @if before the guard to add semantic
		@as(a => Value2(v1, v2), @if v1 > 2) {
			trace(v1 + v2); // Traces 15 because v1 > 2
		}
	}
}