Literals

Literals are the most basic unit in Kores, they are commonly loaded into the stack through the ldc instruction.

Types of Literals

• Boolean
• Byte
• Char
• Short
• Int
• Long
• Float
• Double
• String
• Type/Class
• Dynamic Constant

Also, there is a special value that Kores treats like literals: the null value.

Example of literals use

val str = Literals.STRING("Hello World")
val number1 = Literals.INT(1)
val trueBool = Literals.TRUE
val long10 = Literals.LONG(10)
val nullLiteral = Literals.NULL

Dynamic Constant

The dynamic constant is a more advanced Literal, we will be talking about this feature later, but let's see an example of Dynamic Constant literal use:

data class Coord(val x: Double, val y: Double)

object MyConstBootstrap {
    @JvmStatic
    fun coordBootstrap(lookup: MethodHandles.Lookup, name: String, type: Class<*>, vararg args: Any): Coord {
        return Coord(x = 150.0, y = 150.0)
    }
}

val constantBoostrapSpec = MethodTypeSpec(
    typeOf<MyConstBootstrap>(),
    "coordBootstrap",
    typeSpec(typeOf<Coord>(), typeOf<MethodHandles.Lookup>(), typeOf<String>, typeOf<Class>, typeOf<Array<Any>>())
)

val coordConst = DynamicConstantSpec(
    "coord",
    typeOf<Coord>(),
    MethodInvokeHandleSpec(DynamicInvokeType.INVOKE_STATIC, constantBoostrapSpec),
    Collections.emptyList()
)

Literals.DYNAMIC_CONSTANT(coordConst)