diff options
| -rw-r--r-- | doc/extension.rdoc | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/extension.rdoc b/doc/extension.rdoc index 28052708e2..7eb173debe 100644 --- a/doc/extension.rdoc +++ b/doc/extension.rdoc @@ -867,6 +867,9 @@ arguments. The third argument is a string that specifies how to capture method arguments and assign them to the following VALUE references. +You can just check the argument number with rb_check_arity(), this is +handy in the case you want to treat the arguments as a list. + The following is an example of a method that takes arguments by Ruby's array: @@ -1360,6 +1363,12 @@ rb_define_singleton_method(VALUE klass, const char *name, VALUE (*func)(), int a Defines a singleton method. Arguments are same as rb_define_method(). +rb_check_arity(int argc, int min, int max) :: + + Check the number of arguments, argc is in the range of min..max. If + max is UNLIMITED_ARGUMENTS, upper bound is not checked. If argc is + out of bounds, an ArgumentError will be raised. + rb_scan_args(int argc, VALUE *argv, const char *fmt, ...) :: Retrieve argument from argc and argv to given VALUE references |