[PATCH 17/36] mi/mi-cmd-stack.c|frame filters: print_values <-> ext_lang_frame_args

[Pedro Alves <palves@redhat.com>]

The enums are value compatible by design, but building in C++ mode trips
on them, like:

  ...
  gdb/mi/mi-cmd-stack.c:363:34: error: cannot convert ‘print_values’ to ‘ext_lang_frame_args’ for argument ‘3’ to ‘ext_lang_bt_status apply_ext_lang_frame_filter(frame_info*, int, ext_lang_frame_args, ui_out*, int, int)’
  ...

Fix this by adding a helper function.

gdb/ChangeLog:
2015-02-09  Pedro Alves  <palves@redhat.com>

	* mi/mi-cmd-stack.c (mi_apply_ext_lang_frame_filter): New
	function.
	(mi_cmd_stack_list_locals, mi_cmd_stack_list_args)
	(mi_cmd_stack_list_variables): Use it.
---
 gdb/mi/mi-cmd-stack.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/gdb/mi/mi-cmd-stack.c b/gdb/mi/mi-cmd-stack.c
index 2cbb9bf..18a357e 100644
--- a/gdb/mi/mi-cmd-stack.c
+++ b/gdb/mi/mi-cmd-stack.c
@@ -53,6 +53,22 @@ mi_cmd_enable_frame_filters (char *command, char **argv, int argc)
   frame_filters = 1;
 }
 
+/* Like apply_ext_lang_frame_filter, but take a print_values */
+
+static enum ext_lang_bt_status
+mi_apply_ext_lang_frame_filter (struct frame_info *frame, int flags,
+				enum print_values print_values,
+				struct ui_out *out,
+				int frame_low, int frame_high)
+{
+  /* ext_lang_frame_args's MI options are compatible with MI print
+     values.  */
+  return apply_ext_lang_frame_filter (frame, flags,
+				      (enum ext_lang_frame_args) print_values,
+				      out,
+				      frame_low, frame_high);
+}
+
 /* Print a list of the stack frames.  Args can be none, in which case
    we want to print the whole backtrace, or a pair of numbers
    specifying the frame numbers at which to start and stop the
@@ -252,8 +268,8 @@ mi_cmd_stack_list_locals (char *command, char **argv, int argc)
      {
        int flags = PRINT_LEVEL | PRINT_LOCALS;
 
-       result = apply_ext_lang_frame_filter (frame, flags, print_value,
-					     current_uiout, 0, 0);
+       result = mi_apply_ext_lang_frame_filter (frame, flags, print_value,
+						current_uiout, 0, 0);
      }
 
    /* Run the inbuilt backtrace if there are no filters registered, or
@@ -358,9 +374,9 @@ mi_cmd_stack_list_args (char *command, char **argv, int argc)
       if (py_frame_low == -1)
 	py_frame_low++;
 
-      result = apply_ext_lang_frame_filter (get_current_frame (), flags,
-					    print_values, current_uiout,
-					    py_frame_low, frame_high);
+      result = mi_apply_ext_lang_frame_filter (get_current_frame (), flags,
+					       print_values, current_uiout,
+					       py_frame_low, frame_high);
     }
 
      /* Run the inbuilt backtrace if there are no filters registered, or
@@ -448,8 +464,9 @@ mi_cmd_stack_list_variables (char *command, char **argv, int argc)
      {
        int flags = PRINT_LEVEL | PRINT_ARGS | PRINT_LOCALS;
 
-       result = apply_ext_lang_frame_filter (frame, flags, print_value,
-					     current_uiout, 0, 0);
+       result = mi_apply_ext_lang_frame_filter (frame, flags,
+						print_value,
+						current_uiout, 0, 0);
      }
 
    /* Run the inbuilt backtrace if there are no filters registered, or
-- 
1.9.3