Kotlin 中命名构造函数的惯用方式

在Java中，我有以下类

public class Instruction {

    public static Instruction label(String name) {
        return new Instruction(Kind.label, name, null, 0);
    }

    public static Instruction literal(int value) {
        return new Instruction(Kind.intLiteral, null, null, value);
    }

    public static Instruction literal(boolean value) {
        return new Instruction(Kind.boolLiteral, null, null, value ? 1 : 0);
    }

    public static Instruction command(String name) {
        return new Instruction(Kind.command, name, null, 0);
    }

    public static Instruction jump(String target) {
        return new Instruction(Kind.jump, target, null, 0);
    }

    public static Instruction branch(String ifTarget, String elseTarget) {
        return new Instruction(Kind.branch, ifTarget, elseTarget, 0);
    }

    private final Kind kind;
    private final String s1;
    private final String s2;
    private final int value;

    private Instruction(Kind kind, String s1, String s2, int value) {
        this.kind = kind;
        this.s1 = s1;
        this.s2 = s2;
        this.value = value;
    }
    ...
}

Kotlin 应该怎么做？