marshal.c: allow marshalling keyword_init struct

struct.c: define rb_struct_s_keyword_init to shared with marshal.c

internal.h: add the declaration to be used by marshal.c

test/ruby/test_marshal.rb: add test for Bug#14314

[Feature #14314] [ruby-core:84629]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61616 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

internal.h

@@ -1768,6 +1768,7 @@ VALUE rb_to_symbol_type(VALUE obj);
 /* struct.c */
 VALUE rb_struct_init_copy(VALUE copy, VALUE s);
 VALUE rb_struct_lookup(VALUE s, VALUE idx);
+VALUE rb_struct_s_keyword_init(VALUE klass);
 
 /* time.c */
 struct timeval rb_time_timeval(VALUE);

marshal.c

@@ -1811,17 +1811,31 @@ r_object0(struct load_arg *arg, int *ivp, VALUE extmod)
 	    arg->readable += (len - 1) * 2;
 	    v = r_entry0(v, idx, arg);
 	    values = rb_ary_new2(len);
-	    for (i=0; i<len; i++) {
-		VALUE n = rb_sym2str(RARRAY_AREF(mem, i));
-		slot = r_symbol(arg);
-
-		if (!rb_str_equal(n, slot)) {
-		    rb_raise(rb_eTypeError, "struct %"PRIsVALUE" not compatible (:%"PRIsVALUE" for :%"PRIsVALUE")",
-			     rb_class_name(klass),
-			     slot, n);
+	    {
+		VALUE keywords;
+		int keyword_init = RTEST(rb_struct_s_keyword_init(klass));
+		if (keyword_init) {
+		    keywords = rb_hash_new();
+		    rb_ary_push(values, keywords);
+		}
+
+		for (i=0; i<len; i++) {
+		    VALUE n = rb_sym2str(RARRAY_AREF(mem, i));
+		    slot = r_symbol(arg);
+
+		    if (!rb_str_equal(n, slot)) {
+			rb_raise(rb_eTypeError, "struct %"PRIsVALUE" not compatible (:%"PRIsVALUE" for :%"PRIsVALUE")",
+				 rb_class_name(klass),
+				 slot, n);
+		    }
+		    if (keyword_init) {
+			rb_hash_aset(keywords, RARRAY_AREF(mem, i), r_object(arg));
+		    }
+		    else {
+			rb_ary_push(values, r_object(arg));
+		    }
+		    arg->readable -= 2;
 		}
-                rb_ary_push(values, r_object(arg));
-		arg->readable -= 2;
 	    }
             rb_struct_initialize(v, values);
             v = r_leave(v, arg);

struct.c

@@ -47,6 +47,12 @@ struct_ivar_get(VALUE c, ID id)
     }
 }
 
+VALUE
+rb_struct_s_keyword_init(VALUE klass)
+{
+    return struct_ivar_get(klass, id_keyword_init);
+}
+
 VALUE
 rb_struct_s_members(VALUE klass)
 {
@@ -298,7 +304,7 @@ static VALUE
 rb_struct_s_inspect(VALUE klass)
 {
     VALUE inspect = rb_class_name(klass);
-    if (RTEST(struct_ivar_get(klass, id_keyword_init))) {
+    if (RTEST(rb_struct_s_keyword_init(klass))) {
 	rb_str_cat_cstr(inspect, "(keyword_init: true)");
     }
     return inspect;
@@ -616,7 +622,7 @@ rb_struct_initialize_m(int argc, const VALUE *argv, VALUE self)
 
     rb_struct_modify(self);
     n = num_members(klass);
-    if (argc > 0 && RTEST(struct_ivar_get(klass, id_keyword_init))) {
+    if (argc > 0 && RTEST(rb_struct_s_keyword_init(klass))) {
 	struct struct_hash_set_arg arg;
 	if (argc > 2 || !RB_TYPE_P(argv[0], T_HASH)) {
 	    rb_raise(rb_eArgError, "wrong number of arguments (given %d, expected 0)", argc);

test/ruby/test_marshal.rb

@@ -772,4 +772,11 @@ class TestMarshal < Test::Unit::TestCase
       Marshal.dump(Bug12974.new)
     end
   end
+
+  Bug14314 = Struct.new(:foo, keyword_init: true)
+
+  def test_marshal_keyword_init_struct
+    obj = Bug14314.new(foo: 42)
+    assert_equal obj, Marshal.load(Marshal.dump(obj))
+  end
 end