This will let us implement common functions seen in other lisps,
and allow them to be importable, without explicit imports. The goal
is to keep this as small as we can; we don't want too much magic.
I've added `take' and `drop' as examples of what we can do.
A macro is available in the module where it was defined and
in any module that does a require of the defining module.
Only macros defined in hy.core are globally available.
Fixes#181
The new and improved (import) can handle all cases import-as and
import-from did, so drop the latter two from the language. To do this,
the import builtin had to be changed a little: if there's a single
import statement to return, return it as-is, otherwise return a list of
imports.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
This also fixes a bug in the pass optimize missing branch where the code is
something like: [stmt, [], stmt]; in such case we want to filter out [], so
if we end up with [] we can optimize it. This fix is needed otherwise (do)
inside (do) are not properly optimized.
Signed-off-by: Julien Danjou <julien@danjou.info>
With these changes, the import function will become a lot smarter, and
will combine all of import, import-from and import-as in a hyly lispy
syntax:
(import sys os whatever_else)
(import [sys [exit argv]] [os :as real_os]
[whatever_else [some_function :as sf]])
That is, each argument of import can be:
- A plain symbol, which will be imported
- A list, which will be handled specially
If the argument is a list, the first element will always be the module
name to import, the second member can be either of these:
- A list of symbols to import
- The ':as' keyword
- Nothing
If it is the ':as' keyword, the third argument must be an alias. If it
is a list of symbols to import, we'll iterate through that list too. If
any symbol is followed by an ':as' keyword, we'll pick all three, and
treat the third member as an alias. If there is nothing else in the
list, we'll import the module as-is.
All this combined fixes#113.
Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
