diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index 74898ca1a23fa48421dcb858228414483f9db2d0..5e6a3bcf0598ef436f37f9b414e1565dc5b5a515 100644
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -323,7 +323,7 @@ resolve_function_concept_overload (tree ovl, tree args)
/* Remember the candidate if we can deduce a substitution. */
++processing_template_decl;
tree parms = TREE_VALUE (DECL_TEMPLATE_PARMS (tmpl));
- if (tree subst = coerce_template_parms (parms, args, tmpl))
+ if (tree subst = coerce_template_parms (parms, args, tmpl, tf_none))
{
if (subst == error_mark_node)
++nerrs;
@@ -404,7 +404,7 @@ resolve_concept_check (tree check)
tree args = TREE_OPERAND (id, 1);
tree parms = INNERMOST_TEMPLATE_PARMS (DECL_TEMPLATE_PARMS (tmpl));
++processing_template_decl;
- tree result = coerce_template_parms (parms, args, tmpl);
+ tree result = coerce_template_parms (parms, args, tmpl, tf_none);
--processing_template_decl;
if (result == error_mark_node)
return error_mark_node;
@@ -726,7 +726,7 @@ normalize_concept_check (tree check, tree args, norm_info info)
/* Turn on template processing; coercing non-type template arguments
will automatically assume they're non-dependent. */
++processing_template_decl;
- tree subst = coerce_template_parms (parms, targs, tmpl);
+ tree subst = coerce_template_parms (parms, targs, tmpl, tf_none);
--processing_template_decl;
if (subst == error_mark_node)
return error_mark_node;
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index cec376d90af676cba478841ecf8035be968e0936..867096b08c6d8f1b293acedbc7a36595ad134fbb 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -7468,8 +7468,8 @@ extern tree get_function_template_decl (const_tree);
extern tree resolve_nondeduced_context (tree, tsubst_flags_t);
extern tree resolve_nondeduced_context_or_error (tree, tsubst_flags_t);
extern hashval_t iterative_hash_template_arg (tree arg, hashval_t val);
-extern tree coerce_template_parms (tree, tree, tree);
-extern tree coerce_template_parms (tree, tree, tree, tsubst_flags_t);
+extern tree coerce_template_parms (tree, tree, tree, tsubst_flags_t,
+ bool = true);
extern tree canonicalize_type_argument (tree, tsubst_flags_t);
extern void register_local_specialization (tree, tree);
extern tree retrieve_local_specialization (tree);
diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc
index 1289aabec758206eae0653940cf1f440d3e944ff..51bfbbcd36dc0a7bd4fdafe0068c5dd7d602dfd6 100644
--- a/gcc/cp/pt.cc
+++ b/gcc/cp/pt.cc
@@ -148,10 +148,8 @@ static void add_pending_template (tree);
static tree reopen_tinst_level (struct tinst_level *);
static tree tsubst_initializer_list (tree, tree);
static tree get_partial_spec_bindings (tree, tree, tree);
-static tree coerce_template_parms (tree, tree, tree, tsubst_flags_t,
- bool, bool);
static tree coerce_innermost_template_parms (tree, tree, tree, tsubst_flags_t,
- bool, bool);
+ bool = true);
static void tsubst_enum (tree, tree, tree);
static bool check_instantiated_args (tree, tree, tsubst_flags_t);
static int check_non_deducible_conversion (tree, tree, unification_kind_t, int,
@@ -2172,8 +2170,7 @@ determine_specialization (tree template_id,
{
tree parms = INNERMOST_TEMPLATE_PARMS (DECL_TEMPLATE_PARMS (fns));
targs = coerce_template_parms (parms, explicit_targs, fns,
- tf_warning_or_error,
- /*req_all*/true, /*use_defarg*/true);
+ tf_warning_or_error);
if (targs != error_mark_node
&& constraints_satisfied_p (fns, targs))
templates = tree_cons (targs, fns, templates);
@@ -7833,10 +7830,7 @@ coerce_template_args_for_ttp (tree templ, tree arglist,
arglist = add_to_template_args (outer, arglist);
tree parmlist = DECL_INNERMOST_TEMPLATE_PARMS (templ);
- return coerce_template_parms (parmlist, arglist, templ,
- complain,
- /*require_all_args=*/true,
- /*use_default_args=*/true);
+ return coerce_template_parms (parmlist, arglist, templ, complain);
}
/* A cache of template template parameters with match-all default
@@ -7910,9 +7904,7 @@ coerce_ttp_args_for_tta (tree& arg, tree pargs, tsubst_flags_t complain)
{
tree aparms
= INNERMOST_TEMPLATE_PARMS (DECL_TEMPLATE_PARMS (arg_tmpl));
- pargs = coerce_template_parms (aparms, pargs, arg_tmpl, complain,
- /*require_all*/true,
- /*use_default*/true);
+ pargs = coerce_template_parms (aparms, pargs, arg_tmpl, complain);
}
--processing_template_decl;
return pargs;
@@ -8079,8 +8071,7 @@ coerce_template_template_parms (tree parm_parms_full,
pargs = add_to_template_args (outer_args, pargs);
}
- pargs = coerce_template_parms (arg_parms, pargs, NULL_TREE, tf_none,
- /*require_all*/true, /*use_default*/true);
+ pargs = coerce_template_parms (arg_parms, pargs, NULL_TREE, tf_none);
if (pargs != error_mark_node)
{
tree targs = make_tree_vec (nargs);
@@ -8840,19 +8831,16 @@ pack_expansion_args_count (tree args)
warning messages are issued under control of COMPLAIN.
If REQUIRE_ALL_ARGS is false, argument deduction will be performed
- for arguments not specified in ARGS. Otherwise, if
- USE_DEFAULT_ARGS is true, default arguments will be used to fill in
- unspecified arguments. If REQUIRE_ALL_ARGS is true, but
- USE_DEFAULT_ARGS is false, then all arguments must be specified in
- ARGS. */
+ for arguments not specified in ARGS. If REQUIRE_ALL_ARGS is true,
+ arguments not specified in ARGS must have default arguments which
+ we'll use to fill in ARGS. */
-static tree
+tree
coerce_template_parms (tree parms,
tree args,
tree in_decl,
tsubst_flags_t complain,
- bool require_all_args,
- bool use_default_args)
+ bool require_all_args /* = true */)
{
int nparms, nargs, parm_idx, arg_idx, lost = 0;
tree orig_inner_args;
@@ -8913,9 +8901,8 @@ coerce_template_parms (tree parms,
|| (nargs < nparms - variadic_p
&& require_all_args
&& !variadic_args_p
- && (!use_default_args
- || (TREE_VEC_ELT (parms, nargs) != error_mark_node
- && !TREE_PURPOSE (TREE_VEC_ELT (parms, nargs))))))
+ && (TREE_VEC_ELT (parms, nargs) != error_mark_node
+ && !TREE_PURPOSE (TREE_VEC_ELT (parms, nargs)))))
{
bad_nargs:
if (complain & tf_error)
@@ -9183,30 +9170,6 @@ coerce_template_parms (tree parms,
return new_inner_args;
}
-/* Convert all template arguments to their appropriate types, and
- return a vector containing the innermost resulting template
- arguments. If any error occurs, return error_mark_node. Error and
- warning messages are not issued.
-
- Note that no function argument deduction is performed, and default
- arguments are used to fill in unspecified arguments. */
-tree
-coerce_template_parms (tree parms, tree args, tree in_decl)
-{
- return coerce_template_parms (parms, args, in_decl, tf_none, true, true);
-}
-
-/* Convert all template arguments to their appropriate type, and
- instantiate default arguments as needed. This returns a vector
- containing the innermost resulting template arguments, or
- error_mark_node if unsuccessful. */
-tree
-coerce_template_parms (tree parms, tree args, tree in_decl,
- tsubst_flags_t complain)
-{
- return coerce_template_parms (parms, args, in_decl, complain, true, true);
-}
-
/* Like coerce_template_parms. If PARMS represents all template
parameters levels, this function returns a vector of vectors
representing all the resulting argument levels. Note that in this
@@ -9219,11 +9182,10 @@ coerce_template_parms (tree parms, tree args, tree in_decl,
static tree
coerce_innermost_template_parms (tree parms,
- tree args,
- tree in_decl,
- tsubst_flags_t complain,
- bool require_all_args,
- bool use_default_args)
+ tree args,
+ tree in_decl,
+ tsubst_flags_t complain,
+ bool require_all_args /* = true */)
{
int parms_depth = TMPL_PARMS_DEPTH (parms);
int args_depth = TMPL_ARGS_DEPTH (args);
@@ -9243,8 +9205,7 @@ coerce_innermost_template_parms (tree parms,
if (cur_depth == args_depth)
l = coerce_template_parms (TREE_VALUE (level),
args, in_decl, complain,
- require_all_args,
- use_default_args);
+ require_all_args);
else
l = TMPL_ARGS_LEVEL (args, cur_depth);
@@ -9257,8 +9218,7 @@ coerce_innermost_template_parms (tree parms,
else
coerced_args = coerce_template_parms (INNERMOST_TEMPLATE_PARMS (parms),
args, in_decl, complain,
- require_all_args,
- use_default_args);
+ require_all_args);
return coerced_args;
}
@@ -9953,9 +9913,7 @@ lookup_template_class (tree d1, tree arglist, tree in_decl, tree context,
actually tsubst'd into the definition to create the
instantiation. */
arglist = coerce_innermost_template_parms (parmlist, arglist, gen_tmpl,
- complain,
- /*require_all_args=*/true,
- /*use_default_args=*/true);
+ complain);
if (arglist == error_mark_node)
/* We were unable to bind the arguments. */
@@ -10371,9 +10329,7 @@ finish_template_variable (tree var, tsubst_flags_t complain)
tree arglist = TREE_OPERAND (var, 1);
tree parms = DECL_TEMPLATE_PARMS (templ);
- arglist = coerce_innermost_template_parms (parms, arglist, templ, complain,
- /*req_all*/true,
- /*use_default*/true);
+ arglist = coerce_innermost_template_parms (parms, arglist, templ, complain);
if (arglist == error_mark_node)
return error_mark_node;
@@ -15022,8 +14978,7 @@ tsubst_decl (tree t, tree args, tsubst_flags_t complain)
the template. */
argvec = (coerce_innermost_template_parms
(DECL_TEMPLATE_PARMS (gen_tmpl),
- argvec, t, complain,
- /*all*/true, /*defarg*/true));
+ argvec, t, complain));
if (argvec == error_mark_node)
RETURN (error_mark_node);
hash = spec_hasher::hash (gen_tmpl, argvec);
@@ -21956,11 +21911,8 @@ instantiate_alias_template (tree tmpl, tree args, tsubst_flags_t complain)
if (tmpl == error_mark_node || args == error_mark_node)
return error_mark_node;
- args =
- coerce_innermost_template_parms (DECL_TEMPLATE_PARMS (tmpl),
- args, tmpl, complain,
- /*require_all_args=*/true,
- /*use_default_args=*/true);
+ args = coerce_innermost_template_parms (DECL_TEMPLATE_PARMS (tmpl),
+ args, tmpl, complain);
/* FIXME check for satisfaction in check_instantiated_args. */
if (flag_concepts
@@ -22210,8 +22162,7 @@ fn_type_unification (tree fn,
explicit_targs
= (coerce_template_parms (tparms, explicit_targs, fn,
complain|tf_partial,
- /*require_all_args=*/false,
- /*use_default_args=*/false));
+ /*require_all_args=*/false));
if (explicit_targs == error_mark_node)
goto fail;
@@ -23304,9 +23255,7 @@ resolve_overloaded_unification (tree tparms,
continue;
subargs = coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (fn),
- expl_subargs, NULL_TREE, tf_none,
- /*require_all_args=*/true,
- /*use_default_args=*/true);
+ expl_subargs, NULL_TREE, tf_none);
if (subargs != error_mark_node
&& !any_dependent_template_arguments_p (subargs))
{
@@ -23450,9 +23399,7 @@ resolve_nondeduced_context (tree orig_expr, tsubst_flags_t complain)
continue;
subargs = coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (fn),
- expl_subargs, NULL_TREE, tf_none,
- /*require_all_args=*/true,
- /*use_default_args=*/true);
+ expl_subargs, NULL_TREE, tf_none);
if (subargs != error_mark_node
&& !any_dependent_template_arguments_p (subargs))
{
@@ -25581,7 +25528,7 @@ get_partial_spec_bindings (tree tmpl, tree spec_tmpl, tree args)
if (spec_args != error_mark_node)
spec_args = coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (tmpl),
INNERMOST_TEMPLATE_ARGS (spec_args),
- tmpl, tf_none, false, false);
+ tmpl, tf_none, false);
pop_tinst_level ();