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Fix ruby %alias directive for native c functions

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Using the %alias directive on native C functions causes swig to segfault due to
a dereference of klass (which is NULL for native C functions) in the
defineAliases function of the Ruby module. This commit adds support for an alias
of native C functions for both separate module as well as global functions, as
well as three test cases for the %alias directive of the Ruby module.

Fixes:
mod.i
%module ruby_alias
%alias get_my_name "nickname,fullname";
%inline %{
const char *get_my_name(){
  return "Chester Tester";
}
%}
$ swig -ruby mod.i
Segmentation fault

Signed-off-by: Joel Anderson <joelanderson333@gmail.com>
This commit is contained in:
Joel Anderson 2018-03-21 19:12:54 -04:00
commit a1cea4f483
8 changed files with 129 additions and 1 deletions
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8
Source/Modules/ruby.cxx
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@ -1316,7 +1316,13 @@ public:
Iterator alias = First(aliases);
while (alias.item) {
if (Len(alias.item) > 0) {
if (multipleInheritance) {
if (current == NO_CPP) {
if (useGlobalModule) {
Printv(f_init, tab4, "rb_define_alias(rb_cObject, \"", alias.item, "\", \"", iname, "\");\n", NIL);
} else {
Printv(f_init, tab4, "rb_define_alias(rb_singleton_class(", modvar, "), \"", alias.item, "\", \"", iname, "\");\n", NIL);
}
} else if (multipleInheritance) {
Printv(klass->init, tab4, "rb_define_alias(", klass->mImpl, ", \"", alias.item, "\", \"", iname, "\");\n", NIL);
} else {
Printv(klass->init, tab4, "rb_define_alias(", klass->vname, ", \"", alias.item, "\", \"", iname, "\");\n", NIL);