Prohibit array changes by "a"/"*" specifier of `mrb_get_args()`

The "a"/"*" specifier of the `mrb_get_args()` function will now return `const mrb_value *`.
This is because it is difficult for the caller to check if it is an array object and write-barrier if necessary.
And it requires calling `mrb_ary_modify()` on the unmodified array object, which is also difficult (this is similar to #5087).

1 files changed, 5 insertions, 5 deletions

diff --git a/mrbgems/mruby-struct/src/struct.c b/mrbgems/mruby-struct/src/struct.c
index 7c6f50090..c64a494a5 100644
--- a/mrbgems/mruby-struct/src/struct.c
+++ b/mrbgems/mruby-struct/src/struct.c
@@ -262,12 +262,12 @@ static mrb_value
 mrb_struct_s_def(mrb_state *mrb, mrb_value klass)
 {
   mrb_value name, rest;
-  mrb_value *pargv;
+  const mrb_value *pargv;
   mrb_int argcnt;
   mrb_int i;
   mrb_value b, st;
   mrb_sym id;
-  mrb_value *argv;
+  const mrb_value *argv;
   mrb_int argc;
 
   name = mrb_nil_value();
@@ -321,7 +321,7 @@ num_members(mrb_state *mrb, struct RClass *klass)
 /*
  */
 static mrb_value
-mrb_struct_initialize_withArg(mrb_state *mrb, mrb_int argc, mrb_value *argv, mrb_value self)
+mrb_struct_initialize_withArg(mrb_state *mrb, mrb_int argc, const mrb_value *argv, mrb_value self)
 {
   struct RClass *klass = mrb_obj_class(mrb, self);
   mrb_int i, n;
@@ -343,7 +343,7 @@ mrb_struct_initialize_withArg(mrb_state *mrb, mrb_int argc, mrb_value *argv, mrb
 static mrb_value
 mrb_struct_initialize(mrb_state *mrb, mrb_value self)
 {
-  mrb_value *argv;
+  const mrb_value *argv;
   mrb_int argc;
 
   mrb_get_args(mrb, "*!", &argv, &argc);
@@ -646,7 +646,7 @@ static mrb_value
 mrb_struct_values_at(mrb_state *mrb, mrb_value self)
 {
   mrb_int argc;
-  mrb_value *argv;
+  const mrb_value *argv;
 
   mrb_get_args(mrb, "*", &argv, &argc);