Remove Ruby output_helper fragment and macro

Use SWIG_AppendOutput instead of output_helper (does not require the
output_helper macro).

CHANGES.current

@@ -7,6 +7,11 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
 Version 4.3.0 (in progress)
 ===========================
 
+2024-10-05: wsfulton
+            [Ruby] Removed backwards compatible output_helper fragment and macro.
+            Use SWIG_AppendOutput instead of output_helper (does not require the
+            output_helper macro).
+
 2024-10-05: wsfulton
             [Ruby] #2907 Fix returning null from functions with output parameters.
             Ensures OUTPUT and INOUT typemaps are handled consistently wrt return
@@ -19,6 +24,15 @@ Version 4.3.0 (in progress)
             The 3rd parameter is new and the new $isvoid special variable should be
             passed to it, indicating whether or not the wrapped function returns void.
 
+            Also consider replacing with:
+
+              SWIG_AppendOutput(VALUE target, VALUE o);
+
+            which calls SWIG_Ruby_AppendOutput with same parameters but adding $isvoid
+            for final parameter.
+
+	    *** POTENTIAL INCOMPATIBILITY ***
+
 2024-09-29: clintonstimpson
             [Python] #2350 Switch implementation from static types to heap
             types using PyType_FromSpec() introduced in Python 3.

Examples/ruby/multimap/example.i

@@ -68,10 +68,10 @@ extern int count(char *bytes, int len, char c);
 
 /* Return the mutated string as a new object.  */
 
-%typemap(argout, fragment="output_helper") (char *str, int len) {
+%typemap(argout) (char *str, int len) {
    VALUE o;
    o = rb_str_new($1,$2);
-   $result = output_helper($result,o);
+   $result = SWIG_AppendOutput($result, o);
    free($1);
 }   
 

Examples/test-suite/ruby_manual_proxy.i

@@ -4,7 +4,7 @@
 %typemap(in, numinputs=0) SWIGTYPE ** ($*1_ltype temp) "$1 = &temp;"
 
 %typemap(argout) SWIGTYPE **OUTPARAM {
-  $result = SWIG_Ruby_AppendOutput($result, SWIG_NewPointerObj(*$1, $*1_descriptor, 0));
+  $result = SWIG_AppendOutput($result, SWIG_NewPointerObj(*$1, $*1_descriptor, 0));
 }
 
 %apply SWIGTYPE **OUTPARAM {

Lib/ruby/rubytypemaps.swg

@@ -20,11 +20,6 @@
 /* Ruby fragments for char* strings */
 %include <rubystrings.swg>
 
-/* Backward compatibility output helper */
-%fragment("output_helper","header") %{
-#define output_helper SWIG_Ruby_AppendOutput
-%}
-
 /* ------------------------------------------------------------
  *  Unified typemap section
  * ------------------------------------------------------------ */