I sometimes find it convenient to be able to specify the "short-circuiting" of the "or" operator in the reverse order.

This happens in particular when I use the "and-let*" form, and I want to provide the default alternative:

Instead of

(or
(and-let* (...)
...)
default-value)

it might be preferable to write:

(otherwise default-value
(and-let* (...)
...))

where "otherwise" is defined trivially as

(define-syntax otherwise
(syntax-rules ()
((_) #false)
((_ expression) expression)
((_ expression . expressions)
(or (otherwise . expressions) expression))))

(so it effectively reverses the order of arguments to "or")

Do you think "otherwise" is a good name for this?
Or are there any alterantives that you'd recommend?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Monday, October 11, 2021 at 11:38:20 AM UTC+2, godek....@gmail.com wrote:

I sometimes find it convenient to be able to specify the "short-circuiting" of the "or" operator in the reverse order.

This happens in particular when I use the "and-let*" form, and I want to provide the default alternative:

Instead of

(or
(and-let* (...)
...)
default-value)

it might be preferable to write:

(otherwise default-value
(and-let* (...)
...))

where "otherwise" is defined trivially as

(define-syntax otherwise
(syntax-rules ()
((_) #false)
((_ expression) expression)
((_ expression . expressions)
(or (otherwise . expressions) expression))))

(so it effectively reverses the order of arguments to "or")

Do you think "otherwise" is a good name for this?
Or are there any alterantives that you'd recommend?

If the goal is to reverse `or`, why not write `(or c b a)` instead of `(or a b c)`?

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Mon, 11 Oct 2021 02:38:18 -0700 (PDT), Maciek Godek
<godek.maciek@gmail.com> wrote:

I sometimes find it convenient to be able to specify the
"short-circuiting" of the "or" operator in the reverse order.

This happens in particular when I use the "and-let*" form, and I
want to provide the default alternative:

Instead of

(or
(and-let* (...)
...)
default-value)

it might be preferable to write:

(otherwise default-value
(and-let* (...)
...))

where "otherwise" is defined trivially as

(define-syntax otherwise
(syntax-rules ()
((_) #false)
((_ expression) expression)
((_ expression . expressions)
(or (otherwise . expressions) expression))))

(so it effectively reverses the order of arguments to "or")

Do you think "otherwise" is a good name for this?
Or are there any alterantives that you'd recommend?

In keeping with other wrappers, perhaps "with-default"?

YMMV,
George

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)