Merge pull request #4814 from shuujii/fix-argument-specs-to-IO

Fix argument specs to `IO`

mrbgems/mruby-io/src/io.c

@@ -1321,23 +1321,23 @@ mrb_init_io(mrb_state *mrb)
   MRB_SET_INSTANCE_TT(io, MRB_TT_DATA);
 
   mrb_include_module(mrb, io, mrb_module_get(mrb, "Enumerable")); /* 15.2.20.3 */
-  mrb_define_class_method(mrb, io, "_popen",  mrb_io_s_popen,   MRB_ARGS_ANY());
+  mrb_define_class_method(mrb, io, "_popen",  mrb_io_s_popen,   MRB_ARGS_ARG(1,2));
   mrb_define_class_method(mrb, io, "_sysclose",  mrb_io_s_sysclose, MRB_ARGS_REQ(1));
-  mrb_define_class_method(mrb, io, "for_fd",  mrb_io_s_for_fd,   MRB_ARGS_ANY());
-  mrb_define_class_method(mrb, io, "select",  mrb_io_s_select,  MRB_ARGS_ANY());
-  mrb_define_class_method(mrb, io, "sysopen", mrb_io_s_sysopen, MRB_ARGS_ANY());
+  mrb_define_class_method(mrb, io, "for_fd",  mrb_io_s_for_fd,   MRB_ARGS_ARG(1,2));
+  mrb_define_class_method(mrb, io, "select",  mrb_io_s_select,  MRB_ARGS_ARG(1,3));
+  mrb_define_class_method(mrb, io, "sysopen", mrb_io_s_sysopen, MRB_ARGS_ARG(1,2));
 #if !defined(_WIN32) && !(defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)
   mrb_define_class_method(mrb, io, "_pipe", mrb_io_s_pipe, MRB_ARGS_NONE());
 #endif
 
-  mrb_define_method(mrb, io, "initialize", mrb_io_initialize, MRB_ARGS_ANY());    /* 15.2.20.5.21 (x)*/
+  mrb_define_method(mrb, io, "initialize", mrb_io_initialize, MRB_ARGS_ARG(1,2));    /* 15.2.20.5.21 (x)*/
   mrb_define_method(mrb, io, "initialize_copy", mrb_io_initialize_copy, MRB_ARGS_REQ(1));
   mrb_define_method(mrb, io, "_check_readable", mrb_io_check_readable, MRB_ARGS_NONE());
   mrb_define_method(mrb, io, "isatty",     mrb_io_isatty,     MRB_ARGS_NONE());
   mrb_define_method(mrb, io, "sync",       mrb_io_sync,       MRB_ARGS_NONE());
   mrb_define_method(mrb, io, "sync=",      mrb_io_set_sync,   MRB_ARGS_REQ(1));
-  mrb_define_method(mrb, io, "sysread",    mrb_io_sysread,    MRB_ARGS_ANY());
-  mrb_define_method(mrb, io, "sysseek",    mrb_io_sysseek,    MRB_ARGS_REQ(1));
+  mrb_define_method(mrb, io, "sysread",    mrb_io_sysread,    MRB_ARGS_ARG(1,1));
+  mrb_define_method(mrb, io, "sysseek",    mrb_io_sysseek,    MRB_ARGS_ARG(1,1));
   mrb_define_method(mrb, io, "syswrite",   mrb_io_syswrite,   MRB_ARGS_REQ(1));
   mrb_define_method(mrb, io, "close",      mrb_io_close,      MRB_ARGS_NONE());   /* 15.2.20.5.1 */
   mrb_define_method(mrb, io, "close_write",    mrb_io_close_write,       MRB_ARGS_NONE());