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Bug #5746
closed
Proc#curry too strict about lambda's arity.
Description
Currently, Proc#curry raises an error when you attempt to curry a lambda with optional (but limited) arguments:
l = ->(arg = 42) {}
l.curry(1) # => ArgumentError: wrong number of arguments (1 for 0)
Note that Proc#curry behaves correctly if the Proc was created from a method, even though arguments are treated the same way:
def Object.foo(arg = 42); end
m = Object.method(:foo).to_proc
m.class # => Proc, same as 'l'
m.lambda? # => true, same as 'l'
m.curry(1) # => curried proc
Referring to my evaluation method, my proposed fix passes SST:
a) usefulness: way more useful, as it makes it possible to do something that is not currently possible
b) consistency: makes it consistent with equivalent method
c) intuitiveness and d) performance: similar
It is straightforward (but not obvious), as it passes NIT (but not ODT).
This bug is a consequence of the redmine issue 5694; this will be fixed automatically when 5694 is fixed.
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