Rename _const functions to use overloading instead

This renames a few functions -- skip_spaces_const,
skip_to_space_const, get_number_const, extract_arg_const -- to drop
the "_const" suffix and instead rely on overloading.

This makes future const fixes simpler by reducing the number of lines
that must be changed.  I think it is also not any less clear, as all
these functions have the same interface as their non-const versions by
design.  Furthermore there's an example of using an overload in-tree
already, namely check_for_argument.

This patch was largely created using some perl one-liners; then a few
fixes were applied by hand.

ChangeLog
2017-09-11  Tom Tromey  <tom@tromey.com>

	* common/common-utils.h (skip_to_space): Remove macro, redeclare
	as function.
	(skip_to_space): Rename from skip_to_space_const.
	* common/common-utils.c (skip_to_space): New function.
	(skip_to_space): Rename from skip_to_space_const.
	* cli/cli-utils.h (get_number): Rename from get_number_const.
	(extract_arg): Rename from extract_arg_const.
	* cli/cli-utils.c (get_number): Rename from get_number_const.
	(extract_arg): Rename from extract_arg_const.
	(number_or_range_parser::get_number): Use ::get_number.
	* aarch64-linux-tdep.c, ada-lang.c, arm-linux-tdep.c, ax-gdb.c,
	break-catch-throw.c, breakpoint.c, cli/cli-cmds.c, cli/cli-dump.c,
	cli/cli-script.c, cli/cli-setshow.c, compile/compile.c,
	completer.c, demangle.c, disasm.c, findcmd.c, linespec.c,
	linux-tdep.c, linux-thread-db.c, location.c, mi/mi-parse.c,
	minsyms.c, nat/linux-procfs.c, printcmd.c, probe.c,
	python/py-breakpoint.c, record.c, rust-exp.y, serial.c, stack.c,
	stap-probe.c, tid-parse.c, tracepoint.c: Update all callers.

1 files changed, 3 insertions, 3 deletions

diff --git a/gdb/break-catch-throw.c b/gdb/break-catch-throw.c
index c8612db..faa878e 100644
--- a/gdb/break-catch-throw.c
+++ b/gdb/break-catch-throw.c
@@ -402,7 +402,7 @@ extract_exception_regexp (const char **string)
   const char *start;
   const char *last, *last_space;
 
-  start = skip_spaces_const (*string);
+  start = skip_spaces (*string);
 
   last = start;
   last_space = start;
@@ -416,7 +416,7 @@ extract_exception_regexp (const char **string)
 
       /* No "if" token here.  Skip to the next word start.  */
       last_space = skip_to_space (last);
-      last = skip_spaces_const (last_space);
+      last = skip_spaces (last_space);
     }
 
   *string = last;
@@ -438,7 +438,7 @@ catch_exception_command_1 (enum exception_event_kind ex_event,
 
   if (!arg)
     arg = "";
-  arg = skip_spaces_const (arg);
+  arg = skip_spaces (arg);
 
   std::string except_rx = extract_exception_regexp (&arg);