Support for maps in the MRI C Ruby extension.

This adds the Map container and support for parsing and serializing maps
in the protobuf wire format (as defined by the C++ implementation, with
MapEntry submessages in a repeated field). JSON map
serialization/parsing are not yet supported as these will require some
changes to upb as well.

1 files changed, 5 insertions, 1 deletions

diff --git a/ruby/ext/google/protobuf_c/repeated_field.c b/ruby/ext/google/protobuf_c/repeated_field.c
index 6bd13b07..6e3f0bc7 100644
--- a/ruby/ext/google/protobuf_c/repeated_field.c
+++ b/ruby/ext/google/protobuf_c/repeated_field.c
@@ -324,6 +324,10 @@ VALUE RepeatedField_deep_copy(VALUE _self) {
  * element types are equal, their lengths are equal, and each element is equal.
  * Elements are compared as per normal Ruby semantics, by calling their :==
  * methods (or performing a more efficient comparison for primitive types).
+ *
+ * Repeated fields with dissimilar element types are never equal, even if value
+ * comparison (for example, between integers and floats) would have otherwise
+ * indicated that every element has equal value.
  */
 VALUE RepeatedField_eq(VALUE _self, VALUE _other) {
   if (_self == _other) {
@@ -458,7 +462,7 @@ VALUE RepeatedField_plus(VALUE _self, VALUE list) {
   return dupped;
 }
 
-static void validate_type_class(upb_fieldtype_t type, VALUE klass) {
+void validate_type_class(upb_fieldtype_t type, VALUE klass) {
   if (rb_iv_get(klass, kDescriptorInstanceVar) == Qnil) {
     rb_raise(rb_eArgError,
              "Type class has no descriptor. Please pass a "