Commit Graph

39 Commits

Author SHA1 Message Date
gilch
f4afb0ca7e variadic if
The `if` form now supports elif clauses.
It works like `cond` but without the implicit `do`.
The old `if` is now `if*`

variadic lif now supports "ellif" clauses.

Update if-no-waste compiler to use `if*` properly.

(Sometimes one character is all it takes.)

document if

reword truthiness
2015-10-17 19:51:03 -06:00
Gergely Nagy
9f88e07e1d Drop a set of brackets from let.
This changes let to use a flat list of symbol-value pairs instead of a
vector of vectors. One side effect is that (let [[a 1] z]) is not
expressible now, and one will explicitly need to set a nil value for z,
such as: (let [a 1 z nil]).

Closes #713.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
2015-10-01 10:08:04 +02:00
Gergely Nagy
8e2a892469
hy.contrib.alias: Move defn-alias and defmacro-alias here
As discussed in #880, move defn-alias and defmacro-alias to a contrib
module.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
2015-08-10 09:24:48 +02:00
gilch
7d8ddd9ecb remove lisp-if / lisp-if-not in favor of lif / lif-not 2015-08-09 01:21:12 -06:00
gilch
4cdfdfbafe remove defun in favor of defn 2015-08-09 01:09:52 -06:00
gilch
66c1f38fcc remove catch in favor of except 2015-08-09 00:53:10 -06:00
Gergely Nagy
7db0fcdafb Move Botsbuildbots to contrib
Closes #678.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
2015-08-04 11:59:10 +02:00
Gregor Best
509b72a799 Make (defmain ...) a clean macro 2015-06-15 21:11:48 +02:00
Christopher Allan Webber
917ba9fce5 Test to ensure exception handling in yield-from works right 2014-11-20 20:48:15 -06:00
Christopher Allan Webber
86d8f69ef7 Fix yield-from test indentation
Indentation was inconsistent with our usual indentation style.
2014-11-20 20:48:15 -06:00
Paul Tagliamonte
602f392fe7 Implement yield-from in Python 2.x as a macro
And who said you can't teach an old dog new tricks.

  ... but at the same time, drop Python 3.2 for not knowing this new
  trick.
2014-11-20 20:48:15 -06:00
Tianon Gravi
96410f506e Add a dedicated lisp-if-not / lif-not macro
This is in parallel to `if` / `if-not` (so not without precedent). :)
2014-11-06 12:44:15 -07:00
Gergely Nagy
3f01ed5014 Add a Botsbuildbots function
A tribute to Portal 2, this function will return an infinite list of the
contents of the AUTHORS file on GitHub master (assuming requests is
installed). Except, the macro does this, the function never gets called,
it is purely there for tribute reasons.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
2014-09-05 12:37:51 +02:00
Nicolas Dandrimont
aafb16d69f Merge branch 'master' into pr/584 2014-08-18 18:18:25 +02:00
Allison Kaptur
b56a03750f revert yield-from test
Yield-from was introduced in 3.3, so we have to catch the compile error that's raise in 3.2. :(
2014-06-09 16:33:32 -04:00
John MacKenzie
15ad6cb998 defmacro/g! and HyObject#startswith
Currently, defmacro/g! doesn't respond well when it comes across a
HyObject that doesn't respond to the instance method startswith (e.g.
HyInteger, HyFloat, etc.). This updates defmacro/g! to be a little
safer when searching for the gensyms it needs to create.
2014-05-15 01:51:38 +00:00
Allison Kaptur
caa53fb095 Tests for explicit exception chaining
This also breaks out the PY3 only tests into their own file.  We need to do this because raise from is a syntax error in PY2, so we can't rely on the previous hack of catching a HyCompileError - it would compile fine through Hy and then be a syntax error in Python.
2014-05-01 16:33:10 -04:00
Paul Tagliamonte
217f3ad65f Merge branch 'master' into pr/515 2014-04-10 22:52:41 -04:00
Christopher Allan Webber
d5194f23fa Properly add yield-from, using python's real "yield from".
The yield-from that existed previously wasn't actually implementing the
full complexity of "yield from":

  http://legacy.python.org/dev/peps/pep-0380/#formal-semantics

... this includes passing along errors, and many other things.

Also removes the yield-from backport macro, since it does not seem
possible at present to conditionally build macros.

Thus, there is no longer yield-from on pre-python-3.3 systems.

Includes updated docs and tests to reflect all this.
2014-04-10 14:07:49 -05:00
Christopher Allan Webber
f3d978c5a3 Added lisp-if (or lif), with tests and documentation.
Now everyone can get along and everyone can have a pony, and that pony is
actually a unicorn that shoots rainbows from its horn.
2014-04-10 13:51:28 -05:00
James King
b97e0258e1 Fix for #497
One would expect the form:

    > (defmacro a (&rest b) b)
    > (a 1 2)

To return a tuple object but we have no Hy model so it returns a HyList.
Not sure if this is the right thing to do.
2014-02-19 00:09:37 -05:00
Nicolas Dandrimont
b99af411c8 Merge branch 'master' into pr/461
Conflicts:
	tests/native_tests/native_macros.hy
2014-01-23 21:57:17 +01:00
Gergely Nagy
e90b24b73a
hy/core/macros.hy: Add an (if-not) macro
Sometimes it is better to start with the false condition, sometimes that
makes the code clearer. For that, the (if-not) macro, which simply
reverses the order of the condition blocks, can be of great use.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
2014-01-18 22:56:20 +01:00
Gergely Nagy
21709f0199 hy/core/macros.hy: Add defn-alias / defun-alias
In the same vein as defmacro-alias, this implements defn-alias /
defun-alias, which does essentially the same thing as defmacro-alias,
but for functions.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
2014-01-18 16:09:35 +01:00
Foxboron
d82636958b added for and with macros
Fixed up anaphoric.hy and added the tests too native_tests/__init__.py

added __init__.hy
2013-12-29 16:50:21 +01:00
Bob Tolbert
c80e3c75a0 Adding automatic gensym macro
Adding to the manual gensym for macros are 2 new
macros, but very literal from the CL in
letoverlambda.

The first is the (with-gensyms ...) macro that
can generate a small set of syms for a macro. Works
something like:

(defmacro adder2 [A B]
  (with-gensyms [a b]
    `(let [[~a ~A] [~b ~B]]
       (+ ~a ~b))))

and ~a and ~b will be replaced with (gensym "a") and
(gensym "b") respectively.

Then the final macro is a new defmacro that will automatically
replace symbols prefaced with "g!" with a new gensym based on the
rest of the symbol. So in this final version of 'nif':

(defmacro/g! nif4 (expr pos zero neg)
  `(let [[~g!result ~expr]]
     (cond [(pos? ~g!result) ~pos]
           [(zero? ~g!result) ~zero]
           [(neg? ~g!result) ~neg])))

all uses of ~g!result will be replaced with (gensym "result").
2013-12-15 18:47:46 -07:00
Bob Tolbert
f5d88bb108 gensym in Hy
Simple implementation of gensym in Hy.

Returns a new HySymbol.

Usable in macros like:

(defmacro nif [expr pos zero neg]
  (let [[g (gensym)]]
    `(let [[~g ~expr]]
       (cond [(pos? ~g) ~pos]
             [(zero? ~g) ~zero]
             [(neg? ~g) ~neg]))))

This addresses all the general comments about (gensym), and doesn't
try to implement "auto-gensym" yet. But clearly the macro approach
instead of the pre-processor approach (as described in the
letoverlambda (http://letoverlambda.com/index.cl/guest/chap3.html#sec_5)
is the way to go
2013-12-15 12:36:36 -07:00
Abhishek L
f1c68bd51a Allow macros to return None, fixes #357
Allows Hy macros to return None, to test this

  (defmacro foo [])
  (foo)

Should work now
2013-12-06 00:27:45 +05:30
Konrad Hinsen
b11f2fcf49 Macro if-python2 for compile-time choice between Python 2 and Python 3 code branches 2013-09-02 09:58:35 +02:00
Paul Tagliamonte
1c12b2870e Add yield from via macro magic.
This will let us use (basic) yield from behavior from Python 2. This
 isn't complete, and is low-hanging fruit for others willing to hack
 on hy.

 I've also changed the macrosystem to allow for proper bootstrapping.
 This is similar to how it's done elsewhere in the codebase (stdlib
 stuff).
2013-08-17 11:37:48 -04:00
Paul Tagliamonte
7c91913122 Fix yielding to not suck (#151)
This adds a class to avoid returning when we have a Yieldable
 expression contained in the body of the function. This breaks Python
 2.x, and ought to break Python 3.x, but doesn't.

 We need this fo' context managers, etc.

 This commit also has work from @rwtolbert adding new testcases and
 fixes for yielded entries behind a while / for.
2013-07-14 13:11:27 -04:00
Konrad Hinsen
2674016d3d More tests 2013-06-07 16:36:04 +02:00
Konrad Hinsen
6eacf63b53 Provide both eval-and-compile and eval-when-compile 2013-06-07 16:36:04 +02:00
Konrad Hinsen
80105d9731 eval-when-compile permits compile-time definitions that can be used from macros 2013-06-07 16:36:04 +02:00
Konrad Hinsen
12abef5ed5 Forgot boolean constants.. 2013-06-07 16:35:28 +02:00
Konrad Hinsen
e47bac1f96 Permit macros to return constants 2013-06-05 12:19:06 +02:00
Nicolas Dandrimont
1e7c90c44e Test requires from native code 2013-05-11 21:25:21 +02:00
Nicolas Dandrimont
bd478590fa Make that test macro more lispy 2013-05-11 21:25:21 +02:00
Nicolas Dandrimont
0bbce2a819 Add a native macros test 2013-05-11 19:40:48 +02:00