ensure that functions are only called once, when chaining comparators
This commit is contained in:
parent
9679fc0b52
commit
0bc4da2b51
|
@ -544,6 +544,7 @@ module CoffeeScript
|
|||
class OpNode < Node
|
||||
children :first, :second
|
||||
attr_reader :operator
|
||||
attr_accessor :second
|
||||
|
||||
CONVERSIONS = {
|
||||
:== => "===",
|
||||
|
@ -581,7 +582,13 @@ module CoffeeScript
|
|||
# Mimic Python's chained comparisons. See:
|
||||
# http://docs.python.org/reference/expressions.html#notin
|
||||
def compile_chain(o)
|
||||
write("(#{@first.compile(o)}) && (#{@first.unwrap.second.compile(o)} #{@operator} #{@second.compile(o)})")
|
||||
shared = @first.unwrap.second
|
||||
if shared.is_a?(CallNode)
|
||||
temp = o[:scope].free_variable
|
||||
@first.second = ParentheticalNode.new(AssignNode.new(temp, shared))
|
||||
shared = temp
|
||||
end
|
||||
write("(#{@first.compile(o)}) && (#{shared.compile(o)} #{@operator} #{@second.compile(o)})")
|
||||
end
|
||||
|
||||
def compile_conditional(o)
|
||||
|
|
|
@ -6,4 +6,13 @@ print(true is not false is true is not false)
|
|||
|
||||
print(10 < 20 > 10)
|
||||
|
||||
print(50 > 10 > 5 is parseInt('5', 10))
|
||||
print(50 > 10 > 5 is parseInt('5', 10))
|
||||
|
||||
|
||||
# Make sure that each argument is only evaluated once, even if used
|
||||
# more than once.
|
||||
|
||||
i: 0
|
||||
func: => i++
|
||||
|
||||
print(1 > func() < 1)
|
||||
|
|
Loading…
Reference in New Issue