2020-02-12 Patrick Palka <ppalka@redhat.com>
+ PR c++/69448
+ PR c++/80471
+ * type-utils.h (find_type_usage): Refactor to take a tree * and to
+ return a tree *, and update documentation accordingly.
+ * pt.c (make_auto_1): Set AUTO_IS_DECLTYPE when building a
+ decltype(auto) node.
+ (make_constrained_decltype_auto): No need to explicitly set
+ AUTO_IS_DECLTYPE anymore.
+ (splice_late_return_type): Use find_type_usage to find and
+ replace a possibly nested auto node instead of using is_auto.
+ Check test for is_auto into an assert when deciding whether
+ to late_return_type.
+ (type_uses_auto): Adjust the call to find_type_usage.
+ * parser.c (cp_parser_decltype): No need to explicitly set
+ AUTO_IS_DECLTYPE anymore.
+
* error.c (dump_decl) [CONCEPT_DECL]: Use dump_simple_decl.
(dump_simple_decl): Handle standard concept definitions as well as
variable concept definitions.
}
if (!expr)
- {
- /* Build auto. */
- expr = make_decltype_auto ();
- AUTO_IS_DECLTYPE (expr) = true;
- }
+ /* Build auto. */
+ expr = make_decltype_auto ();
else
expr = finish_decltype_type (expr, id_expression_or_member_access_p,
tf_warning_or_error);
TYPE_CANONICAL (au) = canonical_type_parameter (au);
DECL_ARTIFICIAL (TYPE_NAME (au)) = 1;
SET_DECL_TEMPLATE_PARM_P (TYPE_NAME (au));
+ if (name == decltype_auto_identifier)
+ AUTO_IS_DECLTYPE (au) = true;
return au;
}
make_constrained_decltype_auto (tree con, tree args)
{
tree type = make_auto_1 (decltype_auto_identifier, false);
- /* FIXME: I don't know why this isn't done in make_auto_1. */
- AUTO_IS_DECLTYPE (type) = true;
return make_constrained_placeholder_type (type, con, args);
}
tree
splice_late_return_type (tree type, tree late_return_type)
{
- if (is_auto (type))
+ if (late_return_type)
{
- if (late_return_type)
- return late_return_type;
+ gcc_assert (is_auto (type) || seen_error ());
+ return late_return_type;
+ }
- tree idx = get_template_parm_index (type);
+ if (tree *auto_node = find_type_usage (&type, is_auto))
+ {
+ tree idx = get_template_parm_index (*auto_node);
if (TEMPLATE_PARM_LEVEL (idx) <= processing_template_decl)
/* In an abbreviated function template we didn't know we were dealing
with a function template when we saw the auto return type, so update
it to have the correct level. */
- return make_auto_1 (TYPE_IDENTIFIER (type), true);
+ *auto_node = make_auto_1 (TYPE_IDENTIFIER (*auto_node), true);
}
return type;
}
else
return NULL_TREE;
}
+ else if (tree *tp = find_type_usage (&type, is_auto))
+ return *tp;
else
- return find_type_usage (type, is_auto);
+ return NULL_TREE;
}
/* Report ill-formed occurrences of auto types in ARGUMENTS. If
#ifndef GCC_CP_TYPE_UTILS_H
#define GCC_CP_TYPE_UTILS_H
-/* Returns the first tree within T that is directly matched by PRED. T may be a
- type or PARM_DECL and is incrementally decomposed toward its type-specifier
- until a match is found. NULL_TREE is returned if PRED does not match any
- part of T.
+/* Returns a pointer to the first tree within *TP that is directly matched by
+ PRED. *TP may be a type or PARM_DECL and is incrementally decomposed toward
+ its type-specifier until a match is found. NULL is returned if PRED does not
+ match any part of *TP.
- This is primarily intended for detecting whether T uses `auto' or a concept
+ This is primarily intended for detecting whether *TP uses `auto' or a concept
identifier. Since either of these can only appear as a type-specifier for
the declaration in question, only top-level qualifications are traversed;
find_type_usage does not look through the whole type. */
-inline tree
-find_type_usage (tree t, bool (*pred) (const_tree))
+inline tree *
+find_type_usage (tree *tp, bool (*pred) (const_tree))
{
- enum tree_code code;
+ tree t = *tp;
if (pred (t))
- return t;
+ return tp;
- code = TREE_CODE (t);
+ enum tree_code code = TREE_CODE (t);
if (code == POINTER_TYPE || code == REFERENCE_TYPE
|| code == PARM_DECL || code == OFFSET_TYPE
|| code == FUNCTION_TYPE || code == METHOD_TYPE
|| code == ARRAY_TYPE)
- return find_type_usage (TREE_TYPE (t), pred);
+ return find_type_usage (&TREE_TYPE (t), pred);
if (TYPE_PTRMEMFUNC_P (t))
return find_type_usage
- (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred);
+ (&TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred);
- return NULL_TREE;
+ return NULL;
}
#endif // GCC_CP_TYPE_UTILS_H
2020-02-12 Patrick Palka <ppalka@redhat.com>
+ PR c++/69448
+ PR c++/80471
+ * g++.dg/concepts/abbrev3.C: New test.
+ * g++.dg/cpp2a/concepts-pr80471.C: Adjust a static_assert to expect the
+ correct behavior.
+ * g++.dg/cpp0x/auto9.C: Adjust a dg-error directive.
+
* g++.dg/cpp2a/concepts6.C: New test.
2020-02-10 David Malcolm <dmalcolm@redhat.com>
--- /dev/null
+// PR c++/69448
+// { dg-do compile { target c++14 } }
+// { dg-additional-options "-fconcepts" }
+
+long x;
+
+auto& f(auto) { return x; }
+auto* g(auto) { return &x; }
+
+long& r = f(1);
+long* p = g(1);
struct A2
{
operator auto () -> int; // { dg-error "invalid use of|trailing return type" }
- operator auto*() -> int; // { dg-error "invalid use of|trailing return type" }
+ operator auto*() -> int; // { dg-error "invalid use of|trailing return type|cannot be overloaded" }
};
template <typename> struct B
{
int i;
static_assert(is_same< decltype(f(i)), int& >, "");
- static_assert(is_same< decltype(g(i)), int >, "");
+ static_assert(is_same< decltype(g(i)), int& >, "");
static_assert(is_same< decltype(z(i)), int& >, "");
}
+2020-02-12 Patrick Palka <ppalka@redhat.com>
+
+ PR c++/69448
+ PR c++/80471
+ * libcp1plugin.cc (plugin_get_expr_type): No need to explicitly set
+ AUTO_IS_DECLTYPE anymore.
+
2020-01-07 Paolo Carlini <paolo.carlini@oracle.com>
* libcp1plugin.cc (plugin_build_new_expr): Update build_new call.
if (op0)
type = TREE_TYPE (op0);
else
- {
- type = make_decltype_auto ();
- AUTO_IS_DECLTYPE (type) = true;
- }
+ type = make_decltype_auto ();
return convert_out (ctx->preserve (type));
}
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