Method Call

runtime/sam/expr/function/cast.go:25–46

(args []super.Value)

}

func (c *cast) Call(args []super.Value) super.Value {
	from, to := args[0], args[1]
	if from.IsError() {
		return from
	}
	switch toUnder := to.Under(); toUnder.Type().ID() {
	case super.IDString:
		typ, err := c.sctx.LookupTypeNamed(toUnder.AsString(), super.TypeUnder(from.Type()))
		if err != nil {
			return c.sctx.WrapError("cannot cast to named type: "+err.Error(), from)
		}
		return super.NewValue(typ, from.Bytes())
	case super.IDType:
		typ, err := c.sctx.LookupByValue(toUnder.Bytes())
		if err != nil {
			panic(err)
		}
		val, _ := c.Cast(from, typ)
		return val
	}
	return c.sctx.WrapError("cast target must be a type or type name", to)
}

func (c *cast) Cast(from super.Value, to super.Type) (super.Value, bool) {
	from = from.Deunion()