rand

Documentation

Index

• Variables

Variables

var Module = module.NewBuiltin().
	Func("int() (v int)", rand.Int63).
	Func("float() (v float)", rand.Float64).
	Func("intn(n int) (v int)", rand.Int63n).
	Func("exp_float() (v float)", rand.ExpFloat64).
	Func("norm_float() (v float)", rand.NormFloat64).
	Func("perm(n int) (v []int)", rand.Perm).
	Func("read(b bytes) (n int, err error)", func(ctx context.Context, args ...vm.Object) (ret vm.Object, err error) {
		if len(args) != 1 {
			return nil, vm.ErrWrongNumArguments
		}
		y1, ok := args[0].(*vm.Bytes)
		if !ok {
			return nil, vm.ErrInvalidArgumentType{
				Name:     "first",
				Expected: "bytes",
				Found:    args[0].TypeName(),
			}
		}
		res, err := rand.Read(y1.Value)
		if err != nil {
			ret = module.WrapError(err)
			return
		}
		return &vm.Int{Value: int64(res)}, nil
	}).
	Func("rand(seed int) (rand *Rand)", func(ctx context.Context, args ...vm.Object) (vm.Object, error) {
		if len(args) != 1 {
			return nil, vm.ErrWrongNumArguments
		}
		i1, ok := vm.ToInt64(args[0])
		if !ok {
			return nil, vm.ErrInvalidArgumentType{
				Name:     "first",
				Expected: "int(compatible)",
				Found:    args[0].TypeName(),
			}
		}
		src := rand.NewSource(i1)
		return randRand(rand.New(src)), nil
	})