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-rw-r--r--lib/stdlib/src/io.erl7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/stdlib/src/io.erl b/lib/stdlib/src/io.erl
index 3dddb0d6e7..c92e9e3ade 100644
--- a/lib/stdlib/src/io.erl
+++ b/lib/stdlib/src/io.erl
@@ -32,6 +32,8 @@
parse_erl_exprs/4,parse_erl_form/1,parse_erl_form/2,
parse_erl_form/3,parse_erl_form/4]).
-export([request/1,request/2,requests/1,requests/2]).
+%% Implemented in native code
+-export([printable_range/0]).
-export_type([device/0, format/0, server_no_data/0]).
@@ -66,6 +68,11 @@ o_request(Io, Request, Func) ->
Other
end.
+%% Request what the user considers printable characters
+-spec printable_range() -> 'unicode' | 'latin1'.
+printable_range() ->
+ erlang:nif_error(undefined).
+
%% Put chars takes mixed *unicode* list from R13 onwards.
-spec put_chars(CharData) -> 'ok' when
CharData :: unicode:chardata().