End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
IO#set_encoding
set_encoding(ext_enc) → self
set_encoding(ext_enc, int_enc, **enc_opts) → self
set_encoding('ext_enc:int_enc', **enc_opts) → self
io.c
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static VALUE
rb_io_set_encoding(int argc, VALUE *argv, VALUE io)
{
rb_io_t *fptr;
VALUE v1, v2, opt;
if (!RB_TYPE_P(io, T_FILE)) {
return forward(io, id_set_encoding, argc, argv);
}
argc = rb_scan_args(argc, argv, "11:", &v1, &v2, &opt);
GetOpenFile(io, fptr);
io_encoding_set(fptr, v1, v2, opt);
return io;
}
See Encodings.
Argument ext_enc, if given, must be an Encoding object; it is assigned as the encoding for the stream.
Argument int_enc, if given, must be an Encoding object; it is assigned as the encoding for the internal string.
Argument 'ext_enc:int_enc', if given, is a string containing two colon-separated encoding names; corresponding Encoding objects are assigned as the external and internal encodings for the stream.
Optional keyword arguments enc_opts specify Encoding options.