Re: [PATCH] value.c (record_latest_value): Fix comment.

[Doug Evans <dje at google dot com>]

Doug Evans writes:
 > Hi.
 > 
 > This patch fixes a comment that was found to be wrong in this thread:
 > 
 > https://sourceware.org/ml/gdb-patches/2014-02/msg00674.html
 > 
 > I checked as far back as 6.1.1, and it's never returned -1.
 > [I could go back further, but I don't see the point.]
 > 
 > 2014-02-20  Doug Evans  <dje@google.com>
 > 
 > 	* value.c (record_latest_value): Fix comment.

Hmmm, even part of gdb still thinks record_latest_value can return -1.

2014-02-20  Doug Evans  <dje@google.com>

	* value.c (record_latest_value): Fix comment.
	* printcmd.c (print_command_1): Remove code to handle -1 return from
	record_latest_value.

diff --git a/gdb/value.c b/gdb/value.c
index 73ba18e..50b0245 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -1642,9 +1642,7 @@ set_value_component_location (struct value *component,
 /* Access to the value history.  */
 
 /* Record a new value in the value history.
-   Returns the absolute history index of the entry.
-   Result of -1 indicates the value was not saved; otherwise it is the
-   value history index of this new item.  */
+   Returns the absolute history index of the entry.  */
 
 int
 record_latest_value (struct value *val)
diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index 10d3c23..e5fea17 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -985,16 +985,11 @@ print_command_1 (const char *exp, int voidprint)
       struct value_print_options opts;
       int histindex = record_latest_value (val);
 
-      if (histindex >= 0)
-	annotate_value_history_begin (histindex, value_type (val));
-      else
-	annotate_value_begin (value_type (val));
+      annotate_value_history_begin (histindex, value_type (val));
 
-      if (histindex >= 0)
-	printf_filtered ("$%d = ", histindex);
+      printf_filtered ("$%d = ", histindex);
 
-      if (histindex >= 0)
-	annotate_value_history_value ();
+      annotate_value_history_value ();
 
       get_formatted_print_options (&opts, format);
       opts.raw = fmt.raw;
@@ -1002,10 +997,7 @@ print_command_1 (const char *exp, int voidprint)
       print_formatted (val, fmt.size, &opts, gdb_stdout);
       printf_filtered ("\n");
 
-      if (histindex >= 0)
-	annotate_value_history_end ();
-      else
-	annotate_value_end ();
+      annotate_value_history_end ();
     }
 
   do_cleanups (old_chain);