vim-patch:8.1.1437: code to handle callbacks is duplicated

Problem:    Code to handle callbacks is duplicated.
Solution:   Add callback_T and functions to deal with it.
https://github.com/vim/vim/commit/3a97bb3f0f8bd118ae23f1c97e55d84ff42eef20

Port Vim's put_callback() as callback_put()
because Neovim's naming convention is {type}_{action},
not {action}_{type}.

Renaming put_callback type as PutCallback.
https://neovim.io/develop/style-guide.xml#Type_Names

1 files changed, 15 insertions, 0 deletions

diff --git a/src/nvim/eval/typval.c b/src/nvim/eval/typval.c
index 61de83fc21..4118ec407c 100644
--- a/src/nvim/eval/typval.c
+++ b/src/nvim/eval/typval.c
@@ -1164,6 +1164,21 @@ void callback_free(Callback *callback)
   callback->type = kCallbackNone;
 }
 
+/// Copy a callback into a typval_T.
+void callback_put(Callback *cb, typval_T *tv)
+  FUNC_ATTR_NONNULL_ALL
+{
+  if (cb->type == kCallbackPartial) {
+    tv->v_type = VAR_PARTIAL;
+    tv->vval.v_partial = cb->data.partial;
+    cb->data.partial->pt_refcount++;
+  } else if (cb->type == kCallbackFuncref) {
+    tv->v_type = VAR_FUNC;
+    tv->vval.v_string = vim_strsave(cb->data.funcref);
+    func_ref(cb->data.funcref);
+  }
+}
+
 /// Remove watcher from a dictionary
 ///
 /// @param  dict  Dictionary to remove watcher from.