* gcc/cp/pt.c (make_fnparm_pack): Split out from...

        (instantiate_decl): ...here.
        (tsubst_pack_expansion): Handle being called in a late-specified
        return type.
        * libiberty/cp-demangle.c (d_expression): Handle pack expansion.
        (d_find_pack): Handle DEMANGLE_COMPONENT_FUNCTION_PARAM.
        (d_print_subexpr): Don't wrap function parms in ().
        (d_print_comp) [DEMANGLE_COMPONENT_PACK_EXPANSION]: Handle
        not finding a pack.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145013 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 36 insertions, 6 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 00aa57a84e4..a15a86005ff 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,11 @@
+2009-03-23  Jason Merrill  <jason@redhat.com>
+
+	* cp-demangle.c (d_expression): Handle pack expansion.
+	(d_find_pack): Handle DEMANGLE_COMPONENT_FUNCTION_PARAM.
+	(d_print_subexpr): Don't wrap function parms in ().
+	(d_print_comp) [DEMANGLE_COMPONENT_PACK_EXPANSION]: Handle
+	not finding a pack.
+
 2009-03-17  Jason Merrill  <jason@redhat.com>
 
 	* cp-demangle.c (d_make_function_param): new fn.
diff --git a/libiberty/cp-demangle.c b/libiberty/cp-demangle.c
index e6d3d5ea902..b02f9bbf97e 100644
--- a/libiberty/cp-demangle.c
+++ b/libiberty/cp-demangle.c
@@ -2586,6 +2586,12 @@ d_expression (struct d_info *di)
 			    d_make_comp (di, DEMANGLE_COMPONENT_TEMPLATE, name,
 					 d_template_args (di)));
     }
+  else if (peek == 's' && d_peek_next_char (di) == 'p')
+    {
+      d_advance (di, 2);
+      return d_make_comp (di, DEMANGLE_COMPONENT_PACK_EXPANSION,
+			  d_expression (di), NULL);
+    }
   else if (peek == 'f' && d_peek_next_char (di) == 'p')
     {
       /* Function parameter used in a late-specified return type.  */
@@ -3244,6 +3250,7 @@ d_find_pack (struct d_print_info *dpi,
     case DEMANGLE_COMPONENT_BUILTIN_TYPE:
     case DEMANGLE_COMPONENT_SUB_STD:
     case DEMANGLE_COMPONENT_CHARACTER:
+    case DEMANGLE_COMPONENT_FUNCTION_PARAM:
       return NULL;
 
     case DEMANGLE_COMPONENT_EXTENDED_OPERATOR:
@@ -3284,7 +3291,8 @@ d_print_subexpr (struct d_print_info *dpi,
 		 const struct demangle_component *dc)
 {
   int simple = 0;
-  if (dc->type == DEMANGLE_COMPONENT_NAME)
+  if (dc->type == DEMANGLE_COMPONENT_NAME
+      || dc->type == DEMANGLE_COMPONENT_FUNCTION_PARAM)
     simple = 1;
   if (!simple)
     d_append_char (dpi, '(');
@@ -4012,10 +4020,20 @@ d_print_comp (struct d_print_info *dpi,
 
     case DEMANGLE_COMPONENT_PACK_EXPANSION:
       {
-	struct demangle_component *a = d_find_pack (dpi, d_left (dc));
-	int len = d_pack_length (a);
+	int len;
 	int i;
+	struct demangle_component *a = d_find_pack (dpi, d_left (dc));
+	if (a == NULL)
+	  {
+	    /* d_find_pack won't find anything if the only packs involved
+	       in this expansion are function parameter packs; in that
+	       case, just print the pattern and "...".  */
+	    d_print_subexpr (dpi, d_left (dc));
+	    d_append_string (dpi, "...");
+	    return;
+	  }
 
+	len = d_pack_length (a);
 	dc = d_left (dc);
 	for (i = 0; i < len; ++i)
 	  {
diff --git a/libiberty/testsuite/demangle-expected b/libiberty/testsuite/demangle-expected
index cded6b5d71a..0c451184fc4 100644
--- a/libiberty/testsuite/demangle-expected
+++ b/libiberty/testsuite/demangle-expected
@@ -3885,7 +3885,7 @@ java resource java/util/iso4217.properties
 # decltype/param placeholder test
 --format=gnu-v3
 _Z3addIidEDTplfp_fp0_ET_T0_
-decltype ((parm#1)+(parm#2)) add<int, double>(int, double)
+decltype (parm#1+parm#2) add<int, double>(int, double)
 # decltype/fn call test
 --format=gnu-v3
 _Z4add3IidEDTclL_Z1gEfp_fp0_EET_T0_
@@ -3901,8 +3901,12 @@ void f<int*, float*, double*>(int*, float*, double*)
 # '.' test
 --format=gnu-v3
 _Z1hI1AIiEdEDTcldtfp_1gIT0_EEET_S2_
-decltype (((parm#1).(g<double>))()) h<A<int>, double>(A<int>, double)
+decltype ((parm#1.(g<double>))()) h<A<int>, double>(A<int>, double)
 # test for typed function in decltype
 --format=gnu-v3
 _ZN1AIiE1jIiEEDTplfp_clL_Z1xvEEET_
-decltype ((parm#1)+((x())())) A<int>::j<int>(int)
+decltype (parm#1+((x())())) A<int>::j<int>(int)
+# test for expansion of function parameter pack
+--format=gnu-v3
+_Z1gIIidEEDTclL_Z1fEspplfp_Li1EEEDpT_
+decltype (f((parm#1+(1))...)) g<int, double>(int, double)