Hi,

On Jul 14, 4:30 am, Yang Dong <ydong.pub...@gmail.com> wrote:

> `body' on the 5th line is not evaluted when the macro got expanded,
> but the `mapcar' on the 2nd line is evaluated.

No. Both are evaluated when the macro is expanded. body evaluates to
whatever is bound to the argument.

(our-let [...] (this) (is the) (body))

In this case body evaluates to "((this) (is the) (body))" which is
inserted into the macro expansion. (Note: since we use unquote-splice
aka. ~@ instead of plain unquote aka. ~ the outer list is spliced away
in the expansion)

Hope this helps.

Sincerely
Meikel

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