1 files changed, 14 insertions, 0 deletions
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index e9da1f2f2b..52b0f6cd8a 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -16430,6 +16430,20 @@ static void f_swapinfo(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   get_b0_dict(tv_get_string(argvars), rettv->vval.v_dict);
 }
 
+/// "swapname(expr)" function
+static void f_swapname(typval_T *argvars, typval_T *rettv, FunPtr fptr)
+{
+  rettv->v_type = VAR_STRING;
+  buf_T *buf = tv_get_buf(&argvars[0], false);
+  if (buf == NULL
+      || buf->b_ml.ml_mfp == NULL
+      || buf->b_ml.ml_mfp->mf_fname == NULL) {
+    rettv->vval.v_string = NULL;
+  } else {
+    rettv->vval.v_string = vim_strsave(buf->b_ml.ml_mfp->mf_fname);
+  }
+}
+
 /// "synID(lnum, col, trans)" function
 static void f_synID(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {