Yaltik/hy
2
0
Fork 0
Code Pull Requests Releases Activity

Allow variable without value in `let' declaration

Browse Source 
Fixes issue #138

Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Julien Danjou 2013-04-19 19:20:09 -07:00
parent aadf47ed99
commit 07860b5ce6
2 changed files with 10 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
hy/core/bootstrap.py
View File

@ -133,12 +133,17 @@ def rest_macro(tree):
@macro("let")
def let_macro(tree):
tree.pop(0) # "let"
ret = tree.pop(0) # vars
variables = tree.pop(0)
# tree is now the body
expr = HyExpression([HySymbol("fn"), HyList([])])
for var in ret:
expr.append(HyExpression([HySymbol("setf"), var[0], var[1]]))
for var in variables:
if isinstance(var, list):
expr.append(HyExpression([HySymbol("setf"),
var[0], var[1]]))
else:
expr.append(HyExpression([HySymbol("setf"),
var, HySymbol("None")]))
for stmt in tree:
expr.append(stmt)

3
tests/native_tests/language.hy
View File

@ -479,7 +479,8 @@
(defn test-let []
"NATIVE: test let works rightish"
(assert (= (let [[x 1] [y 2] [z 3]] (+ x y z)) 6)))
(assert (= (let [[x 1] [y 2] [z 3]] (+ x y z)) 6))
(assert (= (let [[x 1] a [y 2] b] (if a 1 2)) 2)))
(defn test-if-mangler []