no one uses Array.try_convert, so removed it that discourages duck typing; close #2317

mrbgems/mruby-array-ext/src/array.c

@@ -3,35 +3,6 @@
 #include "mruby/array.h"
 #include "mruby/range.h"
 
-/*
- *  call-seq:
- *     Array.try_convert(obj) -> array or nil
- *
- *  Try to convert <i>obj</i> into an array, using +to_ary+ method.
- *  Returns converted array or +nil+ if <i>obj</i> cannot be converted
- *  for any reason. This method can be used to check if an argument is an
- *  array.
- *
- *     Array.try_convert([1])   #=> [1]
- *     Array.try_convert("1")   #=> nil
- *
- *     if tmp = Array.try_convert(arg)
- *       # the argument is an array
- *     elsif tmp = String.try_convert(arg)
- *       # the argument is a string
- *     end
- *
- */
-
-static mrb_value
-mrb_ary_s_try_convert(mrb_state *mrb, mrb_value self)
-{
-  mrb_value ary;
-
-  mrb_get_args(mrb, "o", &ary);
-  return mrb_check_array_type(mrb, ary);
-}
-
 /*
  *  call-seq:
  *     ary.assoc(obj)   -> new_ary  or  nil
@@ -139,8 +110,6 @@ mrb_mruby_array_ext_gem_init(mrb_state* mrb)
 {
   struct RClass * a = mrb->array_class;
 
-  mrb_define_class_method(mrb, a, "try_convert", mrb_ary_s_try_convert, MRB_ARGS_REQ(1));
-
   mrb_define_method(mrb, a, "assoc",  mrb_ary_assoc,  MRB_ARGS_REQ(1));
   mrb_define_method(mrb, a, "at",     mrb_ary_at,     MRB_ARGS_REQ(1));
   mrb_define_method(mrb, a, "rassoc", mrb_ary_rassoc, MRB_ARGS_REQ(1));

mrbgems/mruby-array-ext/test/array.rb

 ##
 # Array(Ext) Test
 
-assert("Array::try_convert") do
-  assert_equal [1], Array.try_convert([1])
-  assert_nil Array.try_convert("1")
-end
-
 assert("Array#assoc") do
   s1 = [ "colors", "red", "blue", "green" ]
   s2 = [ "letters", "a", "b", "c" ]