Commit Graph

30 Commits

Author SHA1 Message Date
Zhao Shenyang
dafcc7ec70 add symbol? function to hy.core
`symbol?` will test if the input is an instance of HySymbol. It's useful when writing macros.
2015-01-29 23:17:52 +08:00
Bob Tolbert
ffd85bcc3e Fixes a long-standing bug in import under Python 3.3 and later.
Our MetaImporter was being inserted at the end of sys.meta_path.
For Python prior to 3.3, this was fine since sys.meta_path
was empty by default. As of the completion of PEP 302 in Py3.3 and
later, there are several importers registered by default. One of
these was trying (and failing) to import simple Hy modules,
resulting in a failure to import anything inside __init__.hy.

This change simply inserts the Hy-specific importer at the front
of the list.

This was noted in issue #620 (great catch @algernon)
2014-12-07 11:02:48 -07:00
Paul Tagliamonte
ec593154fe Merge branch 'master' into pr/637
Conflicts:
	hy/core/language.hy
2014-11-15 07:58:56 -05:00
han semaj
99db02668b Fix 'some' (first logical true value or nil) 2014-09-04 21:29:38 +12:00
han semaj
ecc664337d Make nth return default value when out of bounds 2014-08-23 23:35:31 +12:00
han semaj
23f31d4ac1 Reimplement butlast in terms of drop-last 2014-08-22 21:51:12 +12:00
han semaj
7f5c8e39d8 Implement drop-last 2014-08-22 21:09:59 +12:00
han semaj
3f1a24bfe3 Implement interleave and interpose 2014-08-17 14:53:57 +12:00
Tuukka Turto
726d1735db Merge branch 'master' into pr/571
Conflicts:
	AUTHORS
	tests/native_tests/core.hy
2014-05-13 09:32:51 +03:00
Paul Tagliamonte
1696ddecac Merge branch 'master' into pr/578 2014-05-12 20:14:37 -04:00
Matthew Wampler-Doty
7b5cb390ab setv no longer creates variables with '.' in their names
FIXES #577
2014-04-29 09:22:55 -05:00
pyos
8e4b21103c Reimplement some built-ins in terms of the standard library.
As a result:

  * functions such as `nth` should work correctly on iterators;
  * `nth` will raise `IndexError` (in a fashion consistent with `get`)
    when the index is out of bounds;
  * `take`, etc. will raise `ValueError` instead of returning
    an ambiguous value if the index is negative;
  * `map`, `zip`, `range`, `input`, `filter` work the same way (Py3k one)
    on both Python 2 and 3 (see #523 and #331).
2014-04-29 18:03:43 +04:00
Matthew Wampler-Doty
834b0019a7 Fixing doto to be API compatible with Clojure's doto 2014-04-21 12:35:56 -07:00
Tuukka Turto
8a5a1eea27 test for doto macro
relates #567
2014-04-21 13:21:11 +03:00
Paul Tagliamonte
3a9cf486db Add a keyword? function to detect keywords.
Thanks to algernon for the function body; huge improvement.
2014-04-02 22:22:23 -04:00
Berker Peksag
6829d6fb3a Tweak the zipwith doc a bit and add @kirbyfan64 to AUTHORS. 2014-02-22 02:21:34 +02:00
kirbyfan64
d282d65cde Add zipwith 2014-02-22 02:14:27 +02:00
han semaj
24a1567b00 Implement every? and some 2014-02-11 21:42:56 +13:00
James King
cbb8cc1d37 Add integer-char? to core 2014-01-28 17:28:41 -05:00
Abhishek L
10f1f24a18 Adding a simple `identity' function
* hy/core/language.hy: Adding a simple `identity` function that returns
  the argument supplied to it

* docs/language/core.rst: Updated docs with identity function
2014-01-22 00:56:28 +05:30
Abhishek L
f159f1499b Adding a simple coll? function to the core
* hy/core/language.hy:
  -Added a simple coll? function that checks whether the given argument
  is an iterable and not a string,
  - Also replaced the check in `flatten` by coll?

* tests/native_tests/core.hy: Tests updated for checking coll?
2014-01-12 15:49:09 +05:30
Bob Tolbert
032200bcb4 Some small doc fixes
This cleans up a number of doc warnings, including a bad
underline for zero?

While there, added a nil? function to match up with the
new nil is None.

Also un-hid myself from coreteam.
2013-12-31 16:14:05 -07:00
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
Guillermo Vaya
34275fab60 Added type coercing to the right integer for the platform 2013-10-11 08:35:32 +02:00
Guillermo Vaya
f61d702788 Int conversion to long in py2.x
Updated to current master
    Droped HyInt/HyLong commit
2013-10-11 01:49:42 +02:00
Bob Tolbert
399ea1889a Second (smaller) set of native core functions
This rounds out the first pass at a set of core functions, adding
some that were not in the first PR.

From here I'm working on a contrib.seq and contrib.io module to
hold less obvious but maybe interesting native functions that can
move to core if desired.

This should also close out issure #150 asking for some core
functions like these.
2013-09-03 13:52:00 -06:00
kaizoku
b892ec4e66 Add zero? predicate to check if an object is zero 2013-09-02 02:28:21 -07:00
Bob Tolbert
41ae4f4d2c Update:
Updated most methods to replace While with For, and added tons of new tests
    for things like (cycle []) and lists with None's in them.

    thanks @olasd

Add set of new core functions

Add set of new core functions to the stdlib.

Moved the auto-import code from compile_expression to
HySymbol so that "even?' in this style expression will
be found and imported.

(list (filter even? [1 2 3 4 5]))

The core functions are documented in 2 sections, one
for basic functions like (even?..) and (nth ...) and
one for all the sequence functions.

Update: This removes all the caching decorators, misnamed as
'lazy-seq' from the core. All sequence methods now just use
yield to return a generator, so they are Python-lazy

Further refinements of core functions

Cleaned up the docs to use 'iterator' instead of 'generator'

Fixed drop to just return the iterator instead of an extra
yield loop. But also added a test to catch dropping too
many.
2013-07-29 08:52:28 -06:00
Bob Tolbert
62f1f40830 Add set of new core functions
Add set of new core functions to the stdlib.

Moved the auto-import code from compile_expression to
HySymbol so that "even?' in this style expression will
be found and imported.

(list (filter even? [1 2 3 4 5]))

The core functions are documented in 2 sections, one
for basic functions like (even?..) and (nth ...) and
one for all the sequence functions.

Update: This removes all the caching decorators, misnamed as
'lazy-seq' from the core. All sequence methods now just use
yield to return a generator, so they are Python-lazy

Further refinements of core functions

Cleaned up the docs to use 'iterator' instead of 'generator'

Fixed drop to just return the iterator instead of an extra
yield loop. But also added a test to catch dropping too
many.
2013-07-13 09:55:16 -06:00