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Macro if-python2 for compile-time choice between Python 2 and Python 3 code branches

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This commit is contained in:
Konrad Hinsen 2013-09-02 09:58:35 +02:00
parent e693a0267a
commit b11f2fcf49
2 changed files with 11 additions and 0 deletions
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6
hy/core/macros.hy
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@ -1,5 +1,11 @@
;;; hy core macros ;;; hy core macros
(defmacro if-python2 [python2-form python3-form]
(import sys)
(if (< (get sys.version_info 0) 3)
python2-form
python3-form))
(defmacro yield-from [_hy_yield_from_els] (defmacro yield-from [_hy_yield_from_els]
(quasiquote (quasiquote
(for [_hy_yield_from_x (unquote _hy_yield_from_els)] (for [_hy_yield_from_x (unquote _hy_yield_from_els)]

5
tests/native_tests/native_macros.hy
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@ -99,3 +99,8 @@
(yield i)) (yield i))
(yield-from [1 2 3])) (yield-from [1 2 3]))
(assert (= (list (yield-from-test)) [0 1 2 1 2 3]))) (assert (= (list (yield-from-test)) [0 1 2 1 2 3])))
(defn test-if-python2 []
(import sys)
(assert (= (get sys.version_info 0)
(if-python2 2 3))))