Improve map module: Change scopes

- Move `Map` structure definition to `map_defs.h`
- Use `KHASH_DECLARE` on map_defs.h to declare khash function prototypes.
- Redefine `map_foreach` into a macro
- Refactor server.c module to use the new `map_foreach` macro.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/nvim/map_defs.h b/src/nvim/map_defs.h
index d8203aeba6..e1355624dc 100644
--- a/src/nvim/map_defs.h
+++ b/src/nvim/map_defs.h
@@ -1,7 +1,14 @@
 #ifndef NVIM_MAP_DEFS_H
 #define NVIM_MAP_DEFS_H
 
-typedef struct map Map;
+#include "nvim/lib/khash.h"
+
+KHASH_DECLARE(Map, kh_cstr_t, void *)
+
+typedef struct {
+  khash_t(Map) *table;
+} Map;
+
 
 /// Callback for iterating through each key/value pair in a map
 ///