package x

import (
	"errors"
)

func Assert(cond bool, msg string) {
	if cond {
		panic(errors.New(msg))
	}
}

func Check(cond bool, err error) *invariants {
	return new(invariants).Check(cond, err)
}

type invariants struct {
	errs []error
}

func (i *invariants) Check(cond bool, err error) *invariants {
	if !cond {
		i.errs = append(i.errs, err)
	}
	return i
}

func (i *invariants) Join() error {
	return errors.Join(i.errs...)
}
func (i *invariants) First() error {
	if len(i.errs) > 0 {
		return i.errs[0]
	}
	return nil
}
func (i *invariants) All() []error {
	return i.errs
}