method

warn

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warn(p1) public

Display the given message (followed by a newline) on STDERR unless warnings are disabled (for example with the -W0 flag).

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/*
 * call-seq:
 *    warn(msg)   => nil
 *
 * Display the given message (followed by a newline) on STDERR unless
 * warnings are disabled (for example with the <code>-W0</code> flag).
 */

static VALUE
rb_warn_m(self, mesg)
    VALUE self, mesg;
{
    if (!NIL_P(ruby_verbose)) {
        rb_io_write(rb_stderr, mesg);
        rb_io_write(rb_stderr, rb_default_rs);
    }
    return Qnil;
}

warn

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