1 files changed, 21 insertions, 0 deletions
diff --git a/src/nvim/eval.h b/src/nvim/eval.h
index aa034cb2b3..e9cdb108a8 100644
--- a/src/nvim/eval.h
+++ b/src/nvim/eval.h
@@ -266,6 +266,27 @@ typedef int (*ex_unletlock_callback)(lval_T *, char *, exarg_T *, int);
 // Used for checking if local variables or arguments used in a lambda.
 extern bool *eval_lavars_used;
 
+/// Struct passed through eval() functions.
+/// See EVALARG_EVALUATE for a fixed value with eval_flags set to EVAL_EVALUATE.
+typedef struct {
+  int eval_flags;     ///< EVAL_ flag values below
+
+  /// copied from exarg_T when "getline" is "getsourceline". Can be NULL.
+  LineGetter eval_getline;
+  void *eval_cookie;  ///< argument for eval_getline()
+
+  /// pointer to the last line obtained with getsourceline()
+  char *eval_tofree;
+} evalarg_T;
+
+/// Flag for expression evaluation.
+enum {
+  EVAL_EVALUATE = 1,  ///< when missing don't actually evaluate
+};
+
+/// Passed to an eval() function to enable evaluation.
+EXTERN evalarg_T EVALARG_EVALUATE INIT(= { EVAL_EVALUATE, NULL, NULL, NULL });
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval.h.generated.h"
 #endif