extract M5 ownership state helpers

fec/src/own.h

@@ -0,0 +1,24 @@
+#ifndef FE_OWN_H
+#define FE_OWN_H
+
+#include "types.h"
+#include "diag.h"
+
+#define FE_OWN_NODE_CONSUMED      0x100U
+#define FE_OWN_NODE_DEFER_CAPTURE 0x200U
+
+enum FeOwnMoveState {
+    FE_OWN_AVAILABLE = 0,
+    FE_OWN_MOVED = 1,
+    FE_OWN_MAYBE_MOVED = 2
+};
+
+int fe_own_is_copy_type(FeType *type);
+void fe_own_mark_consumed(FeDiags *diags, int *state, FeNode *decl,
+                          FeNode *expr, FeType *type, int in_defer);
+void fe_own_check_use(FeDiags *diags, int state, FeLoc loc);
+int fe_own_merge_move(int left, int right);
+int fe_own_loop_entry(int before, int after);
+int fe_own_loop_exit(int state, int after);
+
+#endif