error.go

package mruby

import "fmt"

var _ RException = &Exception{}

type RException interface {
	RBasic
	error
	SetMessage(string)
}

type Exception struct {
	Object
	message string
}

func (e *Exception) Error() string {
	return e.message
}

func (e *Exception) SetMessage(message string) {
	e.message = message
}

func (mrb *State) Raise(excType RClass, message string) {
	mrb.ExceptionRaise(mrb.ExceptionNewString(excType, message))
}

func (mrb *State) Raisef(excType RClass, format string, args ...any) {
	mrb.Raise(excType, fmt.Sprintf(format, args...))
}

func (mrb *State) ExceptionRaise(excValue Value) {
	exc, ok := excValue.(RException)
	if !ok {
		mrb.Raise(nil, "exception object expected")
	}

	panic(exc)
}

func (mrb *State) ExceptionNewString(class RClass, message string) RException {
	exc := mrb.AllocException(class)
	exc.SetMessage(message)

	return exc
}