/* Handle parameterized types (templates) for GNU C++.
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
+ 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2012
Free Software Foundation, Inc.
Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing.
Rewritten by Jason Merrill (jason@cygnus.com).
}
PACK_EXPANSION_PARAMETER_PACKS (result) = parameter_packs;
+ PACK_EXPANSION_LOCAL_P (result) = at_function_scope_p ();
+
return result;
}
if (complain & tf_error)
{
int errs = errorcount, warns = warningcount;
+ if (processing_template_decl
+ && !require_potential_constant_expression (expr))
+ return NULL_TREE;
expr = cxx_constant_value (expr);
if (errorcount > errs || warningcount > warns)
inform (EXPR_LOC_OR_HERE (expr),
if (requires_type && ! is_type && TREE_CODE (arg) == SCOPE_REF
&& TREE_CODE (TREE_OPERAND (arg, 0)) == TEMPLATE_TYPE_PARM)
{
- permerror (input_location, "to refer to a type member of a template parameter, "
- "use %<typename %E%>", orig_arg);
+ if (TREE_CODE (TREE_OPERAND (arg, 1)) == BIT_NOT_EXPR)
+ {
+ if (complain & tf_error)
+ error ("invalid use of destructor %qE as a type", orig_arg);
+ return error_mark_node;
+ }
+
+ permerror (input_location,
+ "to refer to a type member of a template parameter, "
+ "use %<typename %E%>", orig_arg);
orig_arg = make_typename_type (TREE_OPERAND (arg, 0),
TREE_OPERAND (arg, 1),
return argument_pack;
}
+/* Returns true if the template argument vector ARGS contains
+ any pack expansions, false otherwise. */
+
+static bool
+any_pack_expanson_args_p (tree args)
+{
+ int i;
+ if (args)
+ for (i = 0; i < TREE_VEC_LENGTH (args); ++i)
+ if (PACK_EXPANSION_P (TREE_VEC_ELT (args, i)))
+ return true;
+ return false;
+}
+
/* 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
if ((nargs > nparms && !variadic_p)
|| (nargs < nparms - variadic_p
&& require_all_args
+ && !any_pack_expanson_args_p (inner_args)
&& (!use_default_args
|| (TREE_VEC_ELT (parms, nargs) != error_mark_node
&& !TREE_PURPOSE (TREE_VEC_ELT (parms, nargs))))))
context = tsubst (DECL_CONTEXT (gen_tmpl), arglist,
complain, in_decl);
+ if (context == error_mark_node)
+ return error_mark_node;
+
if (!context)
context = global_namespace;
for (i = 0; i < TREE_VEC_LENGTH (parms); ++i)
{
tree p = TREE_VALUE (TREE_VEC_ELT (parms, i));
+ if (p == error_mark_node)
+ continue;
+
if (parm == p
|| (DECL_INITIAL (parm)
&& DECL_INITIAL (parm) == DECL_INITIAL (p)))
int i, len = -1;
tree result;
htab_t saved_local_specializations = NULL;
+ bool need_local_specializations = false;
int levels;
gcc_assert (PACK_EXPANSION_P (t));
}
if (TREE_CODE (parm_pack) == PARM_DECL)
{
- if (!cp_unevaluated_operand)
+ if (PACK_EXPANSION_LOCAL_P (t))
arg_pack = retrieve_local_specialization (parm_pack);
else
{
arg_pack = NULL_TREE;
else
arg_pack = make_fnparm_pack (arg_pack);
+ need_local_specializations = true;
}
}
else
if (len < 0)
return error_mark_node;
- if (cp_unevaluated_operand)
+ if (need_local_specializations)
{
/* We're in a late-specified return type, so create our own local
specializations table; the current table is either NULL or (in the
}
}
- if (saved_local_specializations)
+ if (need_local_specializations)
{
htab_delete (local_specializations);
local_specializations = saved_local_specializations;
complain | tf_ignore_bad_quals);
return r;
}
- /* Else we must be instantiating the typedef, so fall through. */
+ else
+ /* We don't have an instantiation yet, so drop the typedef. */
+ t = DECL_ORIGINAL_TYPE (decl);
}
if (type
tree optype;
tree template_args = 0;
bool template_id_p = false;
+ bool qualified = BASELINK_QUALIFIED_P (baselink);
/* A baselink indicates a function from a base class. Both the
BASELINK_ACCESS_BINFO and the base class referenced may
if (!object_type)
object_type = current_class_type;
- return adjust_result_of_qualified_name_lookup (baselink,
- qualifying_scope,
- object_type);
+
+ if (qualified)
+ baselink = adjust_result_of_qualified_name_lookup (baselink,
+ qualifying_scope,
+ object_type);
+ return baselink;
}
/* Like tsubst_expr for a SCOPE_REF, given by QUALIFIED_ID. DONE is
if (purpose)
purpose = RECUR (purpose);
value = TREE_VALUE (t);
- if (value && TREE_CODE (value) != LABEL_DECL)
- value = RECUR (value);
+ if (value)
+ {
+ if (TREE_CODE (value) != LABEL_DECL)
+ value = RECUR (value);
+ else
+ {
+ value = lookup_label (DECL_NAME (value));
+ gcc_assert (TREE_CODE (value) == LABEL_DECL);
+ TREE_USED (value) = 1;
+ }
+ }
chain = TREE_CHAIN (t);
if (chain && chain != void_type_node)
chain = RECUR (chain);
case GT_EXPR:
case MEMBER_REF:
case DOTSTAR_EXPR:
- return build_x_binary_op
- (TREE_CODE (t),
- RECUR (TREE_OPERAND (t, 0)),
- (TREE_NO_WARNING (TREE_OPERAND (t, 0))
- ? ERROR_MARK
- : TREE_CODE (TREE_OPERAND (t, 0))),
- RECUR (TREE_OPERAND (t, 1)),
- (TREE_NO_WARNING (TREE_OPERAND (t, 1))
- ? ERROR_MARK
- : TREE_CODE (TREE_OPERAND (t, 1))),
- /*overload=*/NULL,
- complain);
+ {
+ tree r = build_x_binary_op
+ (TREE_CODE (t),
+ RECUR (TREE_OPERAND (t, 0)),
+ (TREE_NO_WARNING (TREE_OPERAND (t, 0))
+ ? ERROR_MARK
+ : TREE_CODE (TREE_OPERAND (t, 0))),
+ RECUR (TREE_OPERAND (t, 1)),
+ (TREE_NO_WARNING (TREE_OPERAND (t, 1))
+ ? ERROR_MARK
+ : TREE_CODE (TREE_OPERAND (t, 1))),
+ /*overload=*/NULL,
+ complain);
+ if (EXPR_P (r) && TREE_NO_WARNING (t))
+ TREE_NO_WARNING (r) = TREE_NO_WARNING (t);
+ return r;
+ }
case SCOPE_REF:
return tsubst_qualified_id (t, args, complain, in_decl, /*done=*/true,
tree fndecl;
tree gen_tmpl;
tree spec;
- HOST_WIDE_INT saved_processing_template_decl;
if (tmpl == error_mark_node)
return error_mark_node;
deferring all checks until we have the FUNCTION_DECL. */
push_deferring_access_checks (dk_deferred);
- /* Although PROCESSING_TEMPLATE_DECL may be true at this point
- (because, for example, we have encountered a non-dependent
- function call in the body of a template function and must now
- determine which of several overloaded functions will be called),
- within the instantiation itself we are not processing a
- template. */
- saved_processing_template_decl = processing_template_decl;
- processing_template_decl = 0;
+ /* Instantiation of the function happens in the context of the function
+ template, not the context of the overload resolution we're doing. */
+ push_to_top_level ();
+ if (DECL_CLASS_SCOPE_P (gen_tmpl))
+ {
+ tree ctx = tsubst (DECL_CONTEXT (gen_tmpl), targ_ptr,
+ complain, gen_tmpl);
+ push_nested_class (ctx);
+ }
/* Substitute template parameters to obtain the specialization. */
fndecl = tsubst (DECL_TEMPLATE_RESULT (gen_tmpl),
targ_ptr, complain, gen_tmpl);
- processing_template_decl = saved_processing_template_decl;
+ if (DECL_CLASS_SCOPE_P (gen_tmpl))
+ pop_nested_class ();
+ pop_from_top_level ();
+
if (fndecl == error_mark_node)
return error_mark_node;
elem = tsubst (TREE_TYPE (fn), subargs, tf_none, NULL_TREE);
if (try_one_overload (tparms, targs, tempargs, parm,
elem, strict, sub_strict, addr_p, explain_p)
- && (!goodfn || !decls_match (goodfn, elem)))
+ && (!goodfn || !same_type_p (goodfn, elem)))
{
goodfn = elem;
++good;
idx = TEMPLATE_TYPE_IDX (parm);
targ = TREE_VEC_ELT (INNERMOST_TEMPLATE_ARGS (targs), idx);
tparm = TREE_VALUE (TREE_VEC_ELT (tparms, idx));
+ if (tparm == error_mark_node)
+ return unify_invalid (explain_p);
/* Check for mixed types and values. */
if ((TREE_CODE (parm) == TEMPLATE_TYPE_PARM
case BOOLEAN_TYPE:
case ENUMERAL_TYPE:
case VOID_TYPE:
+ case NULLPTR_TYPE:
if (TREE_CODE (arg) != TREE_CODE (parm))
return unify_type_mismatch (explain_p, parm, arg);
default:
/* An unresolved overload is a nondeduced context. */
- if (type_unknown_p (parm))
+ if (is_overloaded_fn (parm) || type_unknown_p (parm))
return unify_success (explain_p);
gcc_assert (EXPR_P (parm));
/* Build a dummy EXPR_PACK_EXPANSION that will be used to
expand each argument in the TREE_VALUE of t. */
expr = make_node (EXPR_PACK_EXPANSION);
+ PACK_EXPANSION_LOCAL_P (expr) = true;
PACK_EXPANSION_PARAMETER_PACKS (expr) =
PACK_EXPANSION_PARAMETER_PACKS (TREE_PURPOSE (t));
}
else
{
+ tree tmp;
decl = tsubst_copy (TREE_PURPOSE (t), argvec,
tf_warning_or_error, NULL_TREE);
in_base_initializer = 1;
init = TREE_VALUE (t);
+ tmp = init;
if (init != void_type_node)
init = tsubst_expr (init, argvec,
tf_warning_or_error, NULL_TREE,
/*integral_constant_expression_p=*/false);
+ if (init == NULL_TREE && tmp != NULL_TREE)
+ /* If we had an initializer but it instantiated to nothing,
+ value-initialize the object. This will only occur when
+ the initializer was a pack expansion where the parameter
+ packs used in that expansion were of length zero. */
+ init = void_type_node;
in_base_initializer = 0;
}
return false;
}
+ case STMT_EXPR:
+ /* Treat a GNU statement expression as dependent to avoid crashing
+ under fold_non_dependent_expr; it can't be constant. */
+ return true;
+
default:
/* A constant expression is value-dependent if any subexpression is
value-dependent. */
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