commit a7f0db6f5ca96c5eb8d9b1ceb50b3d3a0a5e05e9
Author: Jason Merrill <jason@redhat.com>
Date: Mon Apr 1 14:05:24 2013 -0400
Implement N2439 (ref-qualifiers for 'this')
* cp-tree.h (FUNCTION_REF_QUALIFIED): New.
(FUNCTION_RVALUE_QUALIFIED): New.
(FUNCTION_OR_METHOD_TYPE_CHECK): New.
(cpp0x_warn_str): Add CPP0X_REF_QUALIFIER.
(cp_ref_qualifier): New enum.
(cp_declarator): Add ref_qualifier.
* parser.c (cp_parser_ref_qualifier_seq_opt): New.
(cp_parser_direct_declarator): Use it.
(make_call_declarator): Adjust.
(cp_parser_lambda_declarator_opt): Adjust.
* call.c (add_function_candidate): Handle ref-qualifier overload
resolution semantics.
(standard_conversion): Adjust.
* class.c (add_method, same_signature_p): Compare ref-qualifiers.
* decl.c (grokdeclarator): Handle ref-qualifiers.
(grokfndecl): Check for invalid ref-qualifiers.
(static_fn_type, revert_static_member_fn): Adjust.
* decl2.c (build_memfn_type): Handle ref-qualifiers.
(check_classfn): Check them.
(cp_reconstruct_complex_type): Retain them.
* error.c (dump_ref_qualifier): New.
(dump_type_suffix, dump_function_decl): Use it.
(maybe_warn_cpp0x): Handle CPP0X_REF_QUALIFIER.
* pt.c (tsubst, tsubst_function_type): Instantiate ref-quals.
(unify): Retain them.
* tree.c (cp_check_qualified_type): New.
(cp_build_qualified_type_real): Keep exception spec and ref-qual.
(build_ref_qualified_type): New.
(strip_typedefs, build_exception_variant): Keep ref-qualifier.
(cp_build_type_attribute_variant): Keep ref-qualifier.
* typeck.c (merge_types): Keep ref-qualifier.
(structural_comptypes): Compare ref-qualifier.
(type_memfn_rqual): New.
(apply_memfn_quals): Take ref-qual argument.
* typeck2.c (build_m_component_ref): Check ref-qualifier.
@@ -1276,7 +1276,10 @@ standard_conversion (tree to, tree from, tree expr, bool c_cast_p,
static_fn_type (tofn)))
return NULL;
- from = build_memfn_type (fromfn, tbase, cp_type_quals (tbase));
+ from = build_memfn_type (fromfn,
+ tbase,
+ cp_type_quals (tbase),
+ type_memfn_rqual (tofn));
from = build_ptrmemfunc_type (build_pointer_type (from));
conv = build_conv (ck_pmem, from, conv);
conv->base_p = true;
@@ -1950,7 +1953,17 @@ add_function_candidate (struct z_candidate **candidates,
{
parmtype = cp_build_qualified_type
(ctype, cp_type_quals (TREE_TYPE (parmtype)));
- parmtype = build_pointer_type (parmtype);
+ if (FUNCTION_REF_QUALIFIED (TREE_TYPE (fn)))
+ {
+ /* If the function has a ref-qualifier, the implicit
+ object parameter has reference type. */
+ bool rv = FUNCTION_RVALUE_QUALIFIED (TREE_TYPE (fn));
+ parmtype = cp_build_reference_type (parmtype, rv);
+ arg = build_fold_indirect_ref (arg);
+ argtype = lvalue_type (arg);
+ }
+ else
+ parmtype = build_pointer_type (parmtype);
}
/* Core issue 899: When [copy-]initializing a temporary to be bound
@@ -1045,6 +1045,12 @@ add_method (tree type, tree method, tree using_decl)
overloaded if any of them is a static member
function declaration.
+ [over.load] Member function declarations with the same name and
+ the same parameter-type-list as well as member function template
+ declarations with the same name, the same parameter-type-list, and
+ the same template parameter lists cannot be overloaded if any of
+ them, but not all, have a ref-qualifier.
+
[namespace.udecl] When a using-declaration brings names
from a base class into a derived class scope, member
functions in the derived class override and/or hide member
@@ -1060,11 +1066,13 @@ add_method (tree type, tree method, tree using_decl)
coming from the using class in overload resolution. */
if (! DECL_STATIC_FUNCTION_P (fn)
&& ! DECL_STATIC_FUNCTION_P (method)
- && TREE_TYPE (TREE_VALUE (parms1)) != error_mark_node
- && TREE_TYPE (TREE_VALUE (parms2)) != error_mark_node
- && (cp_type_quals (TREE_TYPE (TREE_VALUE (parms1)))
- != cp_type_quals (TREE_TYPE (TREE_VALUE (parms2)))))
- continue;
+ /* Either both or neither need to be ref-qualified for
+ differing quals to allow overloading. */
+ && (FUNCTION_REF_QUALIFIED (fn_type)
+ == FUNCTION_REF_QUALIFIED (method_type))
+ && (type_memfn_quals (fn_type) != type_memfn_quals (method_type)
+ || type_memfn_rqual (fn_type) != type_memfn_rqual (method_type)))
+ continue;
/* For templates, the return type and template parameters
must be identical. */
@@ -2063,6 +2071,8 @@ same_signature_p (const_tree fndecl, const_tree base_fndecl)
base_types = TYPE_ARG_TYPES (TREE_TYPE (base_fndecl));
if ((cp_type_quals (TREE_TYPE (TREE_VALUE (base_types)))
== cp_type_quals (TREE_TYPE (TREE_VALUE (types))))
+ && (type_memfn_rqual (TREE_TYPE (fndecl))
+ == type_memfn_rqual (TREE_TYPE (base_fndecl)))
&& compparms (TREE_CHAIN (base_types), TREE_CHAIN (types)))
return 1;
}
@@ -107,8 +107,10 @@ c-common.h, not after.
or FIELD_DECL).
IDENTIFIER_TYPENAME_P (in IDENTIFIER_NODE)
DECL_TINFO_P (in VAR_DECL)
+ FUNCTION_REF_QUALIFIED (in FUNCTION_TYPE, METHOD_TYPE)
5: C_IS_RESERVED_WORD (in IDENTIFIER_NODE)
DECL_VTABLE_OR_VTT_P (in VAR_DECL)
+ FUNCTION_RVALUE_QUALIFIED (in FUNCTION_TYPE, METHOD_TYPE)
6: IDENTIFIER_REPO_CHOSEN (in IDENTIFIER_NODE)
DECL_CONSTRUCTION_VTABLE_P (in VAR_DECL)
TYPE_MARKED_P (in _TYPE)
@@ -221,6 +223,9 @@ c-common.h, not after.
#define BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK(NODE) \
TREE_CHECK(NODE,BOUND_TEMPLATE_TEMPLATE_PARM)
+#define FUNCTION_OR_METHOD_TYPE_CHECK(NODE) \
+ TREE_CHECK2(NODE,FUNCTION_TYPE,METHOD_TYPE)
+
#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
#define THUNK_FUNCTION_CHECK(NODE) __extension__ \
({ __typeof (NODE) const __t = (NODE); \
@@ -431,9 +436,11 @@ typedef enum cpp0x_warn_str
/* inheriting constructors */
CPP0X_INHERITING_CTORS,
/* C++11 attributes */
- CPP0X_ATTRIBUTES
+ CPP0X_ATTRIBUTES,
+ /* ref-qualified member functions */
+ CPP0X_REF_QUALIFIER
} cpp0x_warn_str;
-
+
/* The various kinds of operation used by composite_pointer_type. */
typedef enum composite_pointer_operation
@@ -2527,6 +2534,14 @@ struct GTY((variable_size)) lang_decl {
/* 1 iff VAR_DECL node NODE is virtual table or VTT. */
#define DECL_VTABLE_OR_VTT_P(NODE) TREE_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
+/* 1 iff FUNCTION_TYPE or METHOD_TYPE has a ref-qualifier (either & or &&). */
+#define FUNCTION_REF_QUALIFIED(NODE) \
+ TREE_LANG_FLAG_4 (FUNCTION_OR_METHOD_TYPE_CHECK (NODE))
+
+/* 1 iff FUNCTION_TYPE or METHOD_TYPE has &&-ref-qualifier. */
+#define FUNCTION_RVALUE_QUALIFIED(NODE) \
+ TREE_LANG_FLAG_5 (FUNCTION_OR_METHOD_TYPE_CHECK (NODE))
+
/* Returns 1 iff VAR_DECL is a construction virtual table.
DECL_VTABLE_OR_VTT_P will be true in this case and must be checked
before using this macro. */
@@ -4691,6 +4706,23 @@ enum virt_specifier
typedef int cp_virt_specifiers;
+/* Wherever there is a function-cv-qual, there could also be a ref-qualifier:
+
+ [dcl.fct]
+ The return type, the parameter-type-list, the ref-qualifier, and
+ the cv-qualifier-seq, but not the default arguments or the exception
+ specification, are part of the function type.
+
+ REF_QUAL_NONE Ordinary member function with no ref-qualifier
+ REF_QUAL_LVALUE Member function with the &-ref-qualifier
+ REF_QUAL_RVALUE Member function with the &&-ref-qualifier */
+
+enum cp_ref_qualifier {
+ REF_QUAL_NONE = 0,
+ REF_QUAL_LVALUE = 1,
+ REF_QUAL_RVALUE = 2
+};
+
/* A storage class. */
typedef enum cp_storage_class {
@@ -4852,6 +4884,8 @@ struct cp_declarator {
cp_cv_quals qualifiers;
/* The virt-specifiers for the function. */
cp_virt_specifiers virt_specifiers;
+ /* The ref-qualifier for the function. */
+ cp_ref_qualifier ref_qualifier;
/* The exception-specification for the function. */
tree exception_specification;
/* The late-specified return type, if any. */
@@ -5202,7 +5236,8 @@ extern tree cxx_maybe_build_cleanup (tree, tsubst_flags_t);
/* in decl2.c */
extern bool check_java_method (tree);
-extern tree build_memfn_type (tree, tree, cp_cv_quals);
+extern tree build_memfn_type (tree, tree, cp_cv_quals, cp_ref_qualifier);
+extern tree build_pointer_ptrmemfn_type (tree);
extern tree change_return_type (tree, tree);
extern void maybe_retrofit_in_chrg (tree);
extern void maybe_make_one_only (tree);
@@ -5809,6 +5844,7 @@ extern void diagnose_non_constexpr_vec_init (tree);
extern tree hash_tree_cons (tree, tree, tree);
extern tree hash_tree_chain (tree, tree);
extern tree build_qualified_name (tree, tree, tree, bool);
+extern tree build_ref_qualified_type (tree, cp_ref_qualifier);
extern int is_overloaded_fn (tree);
extern tree dependent_name (tree);
extern tree get_fns (tree);
@@ -5966,7 +6002,8 @@ extern tree build_ptrmemfunc (tree, tree, int, bool,
tsubst_flags_t);
extern int cp_type_quals (const_tree);
extern int type_memfn_quals (const_tree);
-extern tree apply_memfn_quals (tree, cp_cv_quals);
+extern cp_ref_qualifier type_memfn_rqual (const_tree);
+extern tree apply_memfn_quals (tree, cp_cv_quals, cp_ref_qualifier);
extern bool cp_has_mutable_p (const_tree);
extern bool at_least_as_qualified_p (const_tree, const_tree);
extern void cp_apply_type_quals_to_decl (int, tree);
@@ -7319,6 +7319,7 @@ grokfndecl (tree ctype,
int virtualp,
enum overload_flags flags,
cp_cv_quals quals,
+ cp_ref_qualifier rqual,
tree raises,
int check,
int friendp,
@@ -7335,6 +7336,8 @@ grokfndecl (tree ctype,
int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
tree t;
+ if (rqual)
+ type = build_ref_qualified_type (type, rqual);
if (raises)
type = build_exception_variant (type, raises);
@@ -7542,13 +7545,25 @@ grokfndecl (tree ctype,
DECL_DECLARED_CONSTEXPR_P (decl) = true;
DECL_EXTERNAL (decl) = 1;
- if (quals && TREE_CODE (type) == FUNCTION_TYPE)
+ if (TREE_CODE (type) == FUNCTION_TYPE)
{
- error (ctype
- ? G_("static member function %qD cannot have cv-qualifier")
- : G_("non-member function %qD cannot have cv-qualifier"),
- decl);
- quals = TYPE_UNQUALIFIED;
+ if (quals)
+ {
+ error (ctype
+ ? G_("static member function %qD cannot have cv-qualifier")
+ : G_("non-member function %qD cannot have cv-qualifier"),
+ decl);
+ quals = TYPE_UNQUALIFIED;
+ }
+
+ if (rqual)
+ {
+ error (ctype
+ ? G_("static member function %qD cannot have ref-qualifier")
+ : G_("non-member function %qD cannot have ref-qualifier"),
+ decl);
+ rqual = REF_QUAL_NONE;
+ }
}
if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
@@ -7986,7 +8001,8 @@ build_ptrmem_type (tree class_type, tree member_type)
if (TREE_CODE (member_type) == METHOD_TYPE)
{
cp_cv_quals quals = type_memfn_quals (member_type);
- member_type = build_memfn_type (member_type, class_type, quals);
+ cp_ref_qualifier rqual = type_memfn_rqual (member_type);
+ member_type = build_memfn_type (member_type, class_type, quals, rqual);
return build_ptrmemfunc_type (build_pointer_type (member_type));
}
else
@@ -8635,6 +8651,9 @@ grokdeclarator (const cp_declarator *declarator,
/* virt-specifiers that apply to the declarator, for a declaration of
a member function. */
cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
+ /* ref-qualifier that applies to the declarator, for a declaration of
+ a member function. */
+ cp_ref_qualifier rqual = REF_QUAL_NONE;
/* cv-qualifiers that apply to the type specified by the DECLSPECS. */
int type_quals;
tree raises = NULL_TREE;
@@ -9444,6 +9463,8 @@ grokdeclarator (const cp_declarator *declarator,
memfn_quals = declarator->u.function.qualifiers;
/* Pick up virt-specifiers. */
virt_specifiers = declarator->u.function.virt_specifiers;
+ /* And ref-qualifier, too */
+ rqual = declarator->u.function.ref_qualifier;
/* Pick up the exception specifications. */
raises = declarator->u.function.exception_specification;
/* If the exception-specification is ill-formed, let's pretend
@@ -9511,12 +9532,13 @@ grokdeclarator (const cp_declarator *declarator,
therefore returns a void type. */
/* ISO C++ 12.4/2. A destructor may not be declared
- const or volatile. A destructor may not be
- static.
+ const or volatile. A destructor may not be static.
+ A destructor may not be declared with ref-qualifier.
ISO C++ 12.1. A constructor may not be declared
const or volatile. A constructor may not be
- virtual. A constructor may not be static. */
+ virtual. A constructor may not be static.
+ A constructor may not be declared with ref-qualifier. */
if (staticp == 2)
error ((flags == DTOR_FLAG)
? G_("destructor cannot be static member function")
@@ -9529,6 +9551,14 @@ grokdeclarator (const cp_declarator *declarator,
memfn_quals = TYPE_UNQUALIFIED;
}
+ if (rqual)
+ {
+ error ((flags == DTOR_FLAG)
+ ? "destructors may not be ref-qualified"
+ : "constructors may not be ref-qualified");
+ rqual = REF_QUAL_NONE;
+ }
+
if (decl_context == FIELD
&& !member_function_or_else (ctype,
current_class_type,
@@ -9650,14 +9680,18 @@ grokdeclarator (const cp_declarator *declarator,
memfn_quals |= type_memfn_quals (type);
type = build_memfn_type (type,
declarator->u.pointer.class_type,
- memfn_quals);
+ memfn_quals,
+ rqual);
if (type == error_mark_node)
return error_mark_node;
+
+ rqual = REF_QUAL_NONE;
memfn_quals = TYPE_UNQUALIFIED;
}
if (TREE_CODE (type) == FUNCTION_TYPE
- && type_memfn_quals (type) != TYPE_UNQUALIFIED)
+ && (type_memfn_quals (type) != TYPE_UNQUALIFIED
+ || type_memfn_rqual (type) != REF_QUAL_NONE))
error (declarator->kind == cdk_reference
? G_("cannot declare reference to qualified function type %qT")
: G_("cannot declare pointer to qualified function type %qT"),
@@ -10002,12 +10036,13 @@ grokdeclarator (const cp_declarator *declarator,
example "f S::*" declares a pointer to a const-qualified
member function of S. We record the cv-qualification in the
function type. */
- if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
+ if ((rqual || memfn_quals) && TREE_CODE (type) == FUNCTION_TYPE)
{
- type = apply_memfn_quals (type, memfn_quals);
+ type = apply_memfn_quals (type, memfn_quals, rqual);
/* We have now dealt with these qualifiers. */
memfn_quals = TYPE_UNQUALIFIED;
+ rqual = REF_QUAL_NONE;
}
if (type_uses_auto (type))
@@ -10137,8 +10172,10 @@ grokdeclarator (const cp_declarator *declarator,
if (decl_context != TYPENAME)
{
/* A cv-qualifier-seq shall only be part of the function type
- for a non-static member function. [8.3.5/4 dcl.fct] */
- if (type_memfn_quals (type) != TYPE_UNQUALIFIED
+ for a non-static member function. A ref-qualifier shall only
+ .... /same as above/ [dcl.fct] */
+ if ((type_memfn_quals (type) != TYPE_UNQUALIFIED
+ || type_memfn_rqual (type) != REF_QUAL_NONE)
&& (current_class_type == NULL_TREE || staticp) )
{
error (staticp
@@ -10152,6 +10189,7 @@ grokdeclarator (const cp_declarator *declarator,
/* The qualifiers on the function type become the qualifiers on
the non-static member function. */
memfn_quals |= type_memfn_quals (type);
+ rqual = type_memfn_rqual (type);
type_quals = TYPE_UNQUALIFIED;
}
}
@@ -10216,10 +10254,10 @@ grokdeclarator (const cp_declarator *declarator,
ctype = TYPE_METHOD_BASETYPE (type);
if (ctype)
- type = build_memfn_type (type, ctype, memfn_quals);
+ type = build_memfn_type (type, ctype, memfn_quals, rqual);
/* Core issue #547: need to allow this in template type args. */
else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
- type = apply_memfn_quals (type, memfn_quals);
+ type = apply_memfn_quals (type, memfn_quals, rqual);
else
error ("invalid qualifiers on non-member function type");
}
@@ -10288,7 +10326,7 @@ grokdeclarator (const cp_declarator *declarator,
cp_cv_quals real_quals = memfn_quals;
if (constexpr_p && sfk != sfk_constructor && sfk != sfk_destructor)
real_quals |= TYPE_QUAL_CONST;
- type = build_memfn_type (type, ctype, real_quals);
+ type = build_memfn_type (type, ctype, real_quals, rqual);
}
{
@@ -10420,7 +10458,7 @@ grokdeclarator (const cp_declarator *declarator,
? unqualified_id : dname,
parms,
unqualified_id,
- virtualp, flags, memfn_quals, raises,
+ virtualp, flags, memfn_quals, rqual, raises,
friendp ? -1 : 0, friendp, publicp,
inlinep | (2 * constexpr_p),
sfk,
@@ -10641,7 +10679,7 @@ grokdeclarator (const cp_declarator *declarator,
|| storage_class != sc_static);
decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
- virtualp, flags, memfn_quals, raises,
+ virtualp, flags, memfn_quals, rqual, raises,
1, friendp,
publicp, inlinep | (2 * constexpr_p), sfk,
funcdef_flag,
@@ -14216,8 +14254,9 @@ static_fn_type (tree memfntype)
return memfntype;
gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
args = TYPE_ARG_TYPES (memfntype);
+ cp_ref_qualifier rqual = type_memfn_rqual (memfntype);
fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
- fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
+ fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype), rqual);
fntype = (cp_build_type_attribute_variant
(fntype, TYPE_ATTRIBUTES (memfntype)));
fntype = (build_exception_variant
@@ -14233,9 +14272,10 @@ revert_static_member_fn (tree decl)
{
tree stype = static_fn_type (decl);
cp_cv_quals quals = type_memfn_quals (stype);
+ cp_ref_qualifier rqual = type_memfn_rqual (stype);
- if (quals != TYPE_UNQUALIFIED)
- stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
+ if (quals != TYPE_UNQUALIFIED || rqual != REF_QUAL_NONE)
+ stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED, REF_QUAL_NONE);
TREE_TYPE (decl) = stype;
@@ -109,7 +109,8 @@ int at_eof;
that apply to the function). */
tree
-build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals)
+build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals,
+ cp_ref_qualifier rqual)
{
tree raises;
tree attrs;
@@ -129,10 +130,12 @@ build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals)
(TREE_CODE (fntype) == METHOD_TYPE
? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
: TYPE_ARG_TYPES (fntype)));
- if (raises)
- fntype = build_exception_variant (fntype, raises);
if (attrs)
fntype = cp_build_type_attribute_variant (fntype, attrs);
+ if (rqual)
+ fntype = build_ref_qualified_type (fntype, rqual);
+ if (raises)
+ fntype = build_exception_variant (fntype, raises);
return fntype;
}
@@ -157,7 +160,9 @@ change_return_type (tree new_ret, tree fntype)
if (TREE_CODE (fntype) == FUNCTION_TYPE)
{
newtype = build_function_type (new_ret, args);
- newtype = apply_memfn_quals (newtype, type_memfn_quals (fntype));
+ newtype = apply_memfn_quals (newtype,
+ type_memfn_quals (fntype),
+ type_memfn_rqual (fntype));
}
else
newtype = build_method_type_directly
@@ -672,6 +677,11 @@ check_classfn (tree ctype, tree function, tree template_parms)
if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
continue;
+ /* ref-qualifier or absence of same must match. */
+ if (type_memfn_rqual (TREE_TYPE (function))
+ != type_memfn_rqual (TREE_TYPE (fndecl)))
+ continue;
+
/* While finding a match, same types and params are not enough
if the function is versioned. Also check version ("target")
attributes. */
@@ -1260,7 +1270,9 @@ cp_reconstruct_complex_type (tree type, tree bottom)
{
inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
outer = build_function_type (inner, TYPE_ARG_TYPES (type));
- outer = apply_memfn_quals (outer, type_memfn_quals (type));
+ outer = apply_memfn_quals (outer,
+ type_memfn_quals (type),
+ type_memfn_rqual (type));
}
else if (TREE_CODE (type) == METHOD_TYPE)
{
@@ -78,6 +78,7 @@ static void dump_aggr_init_expr_args (tree, int, bool);
static void dump_expr_list (tree, int);
static void dump_global_iord (tree);
static void dump_parameters (tree, int);
+static void dump_ref_qualifier (tree, int);
static void dump_exception_spec (tree, int);
static void dump_template_argument (tree, int);
static void dump_template_argument_list (tree, int);
@@ -832,6 +833,7 @@ dump_type_suffix (tree t, int flags)
pp_cxx_cv_qualifier_seq (cxx_pp, class_of_this_parm (t));
else
pp_cxx_cv_qualifier_seq (cxx_pp, t);
+ dump_ref_qualifier (t, flags);
dump_exception_spec (TYPE_RAISES_EXCEPTIONS (t), flags);
dump_type_suffix (TREE_TYPE (t), flags);
break;
@@ -1426,6 +1428,7 @@ dump_function_decl (tree t, int flags)
{
pp_base (cxx_pp)->padding = pp_before;
pp_cxx_cv_qualifier_seq (cxx_pp, class_of_this_parm (fntype));
+ dump_ref_qualifier (fntype, flags);
}
if (flags & TFF_EXCEPTION_SPECIFICATION)
@@ -1507,6 +1510,21 @@ dump_parameters (tree parmtypes, int flags)
pp_cxx_right_paren (cxx_pp);
}
+/* Print ref-qualifier of a FUNCTION_TYPE or METHOD_TYPE. FLAGS are ignored. */
+
+static void
+dump_ref_qualifier (tree t, int flags ATTRIBUTE_UNUSED)
+{
+ if (FUNCTION_REF_QUALIFIED (t))
+ {
+ pp_base (cxx_pp)->padding = pp_before;
+ if (FUNCTION_RVALUE_QUALIFIED (t))
+ pp_cxx_ws_string (cxx_pp, "&&");
+ else
+ pp_cxx_ws_string (cxx_pp, "&");
+ }
+}
+
/* Print an exception specification. T is the exception specification. */
static void
@@ -3408,6 +3426,11 @@ maybe_warn_cpp0x (cpp0x_warn_str str)
"c++11 attributes "
"only available with -std=c++11 or -std=gnu++11");
break;
+ case CPP0X_REF_QUALIFIER:
+ pedwarn (input_location, 0,
+ "ref-qualifiers "
+ "only available with -std=c++0x or -std=gnu++0x");
+ break;
default:
gcc_unreachable ();
}
@@ -1234,7 +1234,7 @@ clear_decl_specs (cp_decl_specifier_seq *decl_specs)
VAR_DECLs or FUNCTION_DECLs) should do that directly. */
static cp_declarator *make_call_declarator
- (cp_declarator *, tree, cp_cv_quals, cp_virt_specifiers, tree, tree);
+ (cp_declarator *, tree, cp_cv_quals, cp_virt_specifiers, cp_ref_qualifier, tree, tree);
static cp_declarator *make_array_declarator
(cp_declarator *, tree);
static cp_declarator *make_pointer_declarator
@@ -1413,6 +1413,7 @@ make_call_declarator (cp_declarator *target,
tree parms,
cp_cv_quals cv_qualifiers,
cp_virt_specifiers virt_specifiers,
+ cp_ref_qualifier ref_qualifier,
tree exception_specification,
tree late_return_type)
{
@@ -1423,6 +1424,7 @@ make_call_declarator (cp_declarator *target,
declarator->u.function.parameters = parms;
declarator->u.function.qualifiers = cv_qualifiers;
declarator->u.function.virt_specifiers = virt_specifiers;
+ declarator->u.function.ref_qualifier = ref_qualifier;
declarator->u.function.exception_specification = exception_specification;
declarator->u.function.late_return_type = late_return_type;
if (target)
@@ -2018,6 +2020,8 @@ static cp_cv_quals cp_parser_cv_qualifier_seq_opt
(cp_parser *);
static cp_virt_specifiers cp_parser_virt_specifier_seq_opt
(cp_parser *);
+static cp_ref_qualifier cp_parser_ref_qualifier_seq_opt
+ (cp_parser *);
static tree cp_parser_late_return_type_opt
(cp_parser *, cp_cv_quals);
static tree cp_parser_declarator_id
@@ -8640,6 +8644,7 @@ cp_parser_lambda_declarator_opt (cp_parser* parser, tree lambda_expr)
? TYPE_UNQUALIFIED : TYPE_QUAL_CONST);
declarator = make_call_declarator (declarator, param_list, quals,
VIRT_SPEC_UNSPECIFIED,
+ REF_QUAL_NONE,
exception_spec,
/*late_return_type=*/NULL_TREE);
declarator->id_loc = LAMBDA_EXPR_LOCATION (lambda_expr);
@@ -16309,6 +16314,7 @@ cp_parser_declarator (cp_parser* parser,
declarator-id
direct-declarator ( parameter-declaration-clause )
cv-qualifier-seq [opt]
+ ref-qualifier [opt]
exception-specification [opt]
direct-declarator [ constant-expression [opt] ]
( declarator )
@@ -16317,6 +16323,7 @@ cp_parser_declarator (cp_parser* parser,
direct-abstract-declarator [opt]
( parameter-declaration-clause )
cv-qualifier-seq [opt]
+ ref-qualifier [opt]
exception-specification [opt]
direct-abstract-declarator [opt] [ constant-expression [opt] ]
( abstract-declarator )
@@ -16431,12 +16438,13 @@ cp_parser_direct_declarator (cp_parser* parser,
/* Consume the `)'. */
cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
- /* If all went well, parse the cv-qualifier-seq and the
- exception-specification. */
+ /* If all went well, parse the cv-qualifier-seq,
+ ref-qualifier and the exception-specification. */
if (member_p || cp_parser_parse_definitely (parser))
{
cp_cv_quals cv_quals;
cp_virt_specifiers virt_specifiers;
+ cp_ref_qualifier ref_qual;
tree exception_specification;
tree late_return;
tree attrs;
@@ -16451,6 +16459,8 @@ cp_parser_direct_declarator (cp_parser* parser,
/* Parse the cv-qualifier-seq. */
cv_quals = cp_parser_cv_qualifier_seq_opt (parser);
+ /* Parse the ref-qualifier. */
+ ref_qual = cp_parser_ref_qualifier_seq_opt (parser);
/* And the exception-specification. */
exception_specification
= cp_parser_exception_specification_opt (parser);
@@ -16468,6 +16478,7 @@ cp_parser_direct_declarator (cp_parser* parser,
params,
cv_quals,
virt_specifiers,
+ ref_qual,
exception_specification,
late_return);
declarator->std_attributes = attrs;
@@ -17008,6 +17019,38 @@ cp_parser_cv_qualifier_seq_opt (cp_parser* parser)
return cv_quals;
}
+/* Parse an (optional) ref-qualifier
+
+ ref-qualifier:
+ &
+ &&
+
+ Returns cp_ref_qualifier representing ref-qualifier. */
+
+static cp_ref_qualifier
+cp_parser_ref_qualifier_seq_opt (cp_parser* parser)
+{
+ cp_ref_qualifier ref_qual = REF_QUAL_NONE;
+ cp_token *token = cp_lexer_peek_token (parser->lexer);
+ switch (token->type)
+ {
+ case CPP_AND:
+ ref_qual = REF_QUAL_LVALUE;
+ break;
+ case CPP_AND_AND:
+ ref_qual = REF_QUAL_RVALUE;
+ break;
+ }
+
+ if (ref_qual)
+ {
+ maybe_warn_cpp0x (CPP0X_REF_QUALIFIER);
+ cp_lexer_consume_token (parser->lexer);
+ }
+
+ return ref_qual;
+}
+
/* Parse an (optional) virt-specifier-seq.
virt-specifier-seq:
@@ -10955,7 +10955,9 @@ tsubst_function_type (tree t,
if (TREE_CODE (t) == FUNCTION_TYPE)
{
fntype = build_function_type (return_type, arg_types);
- fntype = apply_memfn_quals (fntype, type_memfn_quals (t));
+ fntype = apply_memfn_quals (fntype,
+ type_memfn_quals (t),
+ type_memfn_rqual (t));
}
else
{
@@ -10977,6 +10979,7 @@ tsubst_function_type (tree t,
fntype = build_method_type_directly (r, return_type,
TREE_CHAIN (arg_types));
+ fntype = build_ref_qualified_type (fntype, type_memfn_rqual (t));
}
fntype = cp_build_type_attribute_variant (fntype, TYPE_ATTRIBUTES (t));
@@ -11609,7 +11612,9 @@ tsubst (tree t, tree args, tsubst_flags_t complain, tree in_decl)
/* The type of the implicit object parameter gets its
cv-qualifiers from the FUNCTION_TYPE. */
tree memptr;
- tree method_type = build_memfn_type (type, r, type_memfn_quals (type));
+ tree method_type
+ = build_memfn_type (type, r, type_memfn_quals (type),
+ type_memfn_rqual (type));
memptr = build_ptrmemfunc_type (build_pointer_type (method_type));
return cp_build_qualified_type_real (memptr, cp_type_quals (t),
complain);
@@ -17097,10 +17102,12 @@ unify (tree tparms, tree targs, tree parm, tree arg, int strict,
build_function_type (TREE_TYPE (method_type),
TREE_CHAIN (TYPE_ARG_TYPES (method_type)));
- /* Extract the cv-qualifiers of the member function from the
- implicit object parameter and place them on the function
- type to be restored later. */
- fntype = apply_memfn_quals (fntype, type_memfn_quals (method_type));
+ /* Extract the cv-qualifiers and ref-qualifier of the member
+ function from the implicit object parameter and place them
+ on the function type to be restored later. */
+ fntype = apply_memfn_quals (fntype,
+ type_memfn_quals (method_type),
+ type_memfn_rqual (method_type));
return unify (tparms, targs, TREE_TYPE (parm), fntype, strict, explain_p);
}
@@ -1081,6 +1081,15 @@ cp_build_qualified_type_real (tree type,
/* Retrieve (or create) the appropriately qualified variant. */
result = build_qualified_type (type, type_quals);
+ /* Preserve exception specs and ref-qualifier since build_qualified_type
+ doesn't know about them. */
+ if (TREE_CODE (result) == FUNCTION_TYPE
+ || TREE_CODE (result) == METHOD_TYPE)
+ {
+ result = build_exception_variant (result, TYPE_RAISES_EXCEPTIONS (type));
+ result = build_ref_qualified_type (result, type_memfn_rqual (type));
+ }
+
/* If this was a pointer-to-method type, and we just made a copy,
then we need to unshare the record that holds the cached
pointer-to-member-function type, because these will be distinct
@@ -1214,7 +1223,9 @@ strip_typedefs (tree t)
{
result = build_function_type (type,
arg_types);
- result = apply_memfn_quals (result, type_memfn_quals (t));
+ result = apply_memfn_quals (result,
+ type_memfn_quals (t),
+ type_memfn_rqual (t));
}
if (TYPE_RAISES_EXCEPTIONS (t))
@@ -1702,6 +1713,64 @@ build_qualified_name (tree type, tree scope, tree name, bool template_p)
return t;
}
+/* Like check_qualified_type, but also check ref-qualifier and exception
+ specification. */
+
+static bool
+cp_check_qualified_type (const_tree cand, const_tree base, int type_quals,
+ cp_ref_qualifier rqual, tree raises)
+{
+ return (check_qualified_type (cand, base, type_quals)
+ && comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (cand),
+ ce_exact)
+ && type_memfn_rqual (cand) == rqual);
+}
+
+/* Build the FUNCTION_TYPE or METHOD_TYPE with the ref-qualifier RQUAL. */
+
+tree
+build_ref_qualified_type (tree type, cp_ref_qualifier rqual)
+{
+ tree t;
+
+ if (rqual == type_memfn_rqual (type))
+ return type;
+
+ int type_quals = TYPE_QUALS (type);
+ tree raises = TYPE_RAISES_EXCEPTIONS (type);
+ for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
+ if (cp_check_qualified_type (t, type, type_quals, rqual, raises))
+ return t;
+
+ t = build_variant_type_copy (type);
+ switch (rqual)
+ {
+ case REF_QUAL_RVALUE:
+ FUNCTION_RVALUE_QUALIFIED (t) = 1;
+ /* Intentional fall through */
+ case REF_QUAL_LVALUE:
+ FUNCTION_REF_QUALIFIED (t) = 1;
+ break;
+ default:
+ FUNCTION_REF_QUALIFIED (t) = 0;
+ break;
+ }
+
+ if (TYPE_STRUCTURAL_EQUALITY_P (type))
+ /* Propagate structural equality. */
+ SET_TYPE_STRUCTURAL_EQUALITY (t);
+ else if (TYPE_CANONICAL (type) != type)
+ /* Build the underlying canonical type, since it is different
+ from TYPE. */
+ TYPE_CANONICAL (t) = build_ref_qualified_type (TYPE_CANONICAL (type),
+ rqual);
+ else
+ /* T is its own canonical type. */
+ TYPE_CANONICAL (t) = t;
+
+ return t;
+}
+
/* Returns nonzero if X is an expression for a (possibly overloaded)
function. If "f" is a function or function template, "f", "c->f",
"c.f", "C::f", and "f<int>" will all be considered possibly
@@ -1907,9 +1976,9 @@ build_exception_variant (tree type, tree raises)
return type;
type_quals = TYPE_QUALS (type);
+ cp_ref_qualifier rqual = type_memfn_rqual (type);
for (v = TYPE_MAIN_VARIANT (type); v; v = TYPE_NEXT_VARIANT (v))
- if (check_qualified_type (v, type, type_quals)
- && comp_except_specs (raises, TYPE_RAISES_EXCEPTIONS (v), ce_exact))
+ if (cp_check_qualified_type (v, type, type_quals, rqual, raises))
return v;
/* Need to build a new variant. */
@@ -3308,8 +3377,12 @@ cp_build_type_attribute_variant (tree type, tree attributes)
new_type = build_type_attribute_variant (type, attributes);
if (TREE_CODE (new_type) == FUNCTION_TYPE
|| TREE_CODE (new_type) == METHOD_TYPE)
- new_type = build_exception_variant (new_type,
- TYPE_RAISES_EXCEPTIONS (type));
+ {
+ new_type = build_exception_variant (new_type,
+ TYPE_RAISES_EXCEPTIONS (type));
+ new_type = build_ref_qualified_type (new_type,
+ type_memfn_rqual (type));
+ }
/* Making a new main variant of a class type is broken. */
gcc_assert (!CLASS_TYPE_P (type) || new_type == type);
@@ -832,7 +832,10 @@ merge_types (tree t1, tree t2)
rval = build_function_type (valtype, parms);
gcc_assert (type_memfn_quals (t1) == type_memfn_quals (t2));
- rval = apply_memfn_quals (rval, type_memfn_quals (t1));
+ gcc_assert (type_memfn_rqual (t1) == type_memfn_rqual (t2));
+ rval = apply_memfn_quals (rval,
+ type_memfn_quals (t1),
+ type_memfn_rqual (t1));
raises = merge_exception_specifiers (TYPE_RAISES_EXCEPTIONS (t1),
TYPE_RAISES_EXCEPTIONS (t2),
NULL_TREE);
@@ -1184,6 +1187,12 @@ structural_comptypes (tree t1, tree t2, int strict)
if (TREE_CODE (t1) == FUNCTION_TYPE
&& type_memfn_quals (t1) != type_memfn_quals (t2))
return false;
+ /* Need to check this before TYPE_MAIN_VARIANT.
+ FIXME function qualifiers should really change the main variant. */
+ if ((TREE_CODE (t1) == FUNCTION_TYPE
+ || TREE_CODE (t1) == METHOD_TYPE)
+ && type_memfn_rqual (t1) != type_memfn_rqual (t2))
+ return false;
if (TYPE_FOR_JAVA (t1) != TYPE_FOR_JAVA (t2))
return false;
@@ -8563,6 +8572,22 @@ cp_type_quals (const_tree type)
return quals;
}
+/* Returns the function-ref-qualifier for TYPE */
+
+cp_ref_qualifier
+type_memfn_rqual (const_tree type)
+{
+ gcc_assert (TREE_CODE (type) == FUNCTION_TYPE
+ || TREE_CODE (type) == METHOD_TYPE);
+
+ if (!FUNCTION_REF_QUALIFIED (type))
+ return REF_QUAL_NONE;
+ else if (FUNCTION_RVALUE_QUALIFIED (type))
+ return REF_QUAL_RVALUE;
+ else
+ return REF_QUAL_LVALUE;
+}
+
/* Returns the function-cv-quals for TYPE, which must be a FUNCTION_TYPE or
METHOD_TYPE. */
@@ -8578,18 +8603,22 @@ type_memfn_quals (const_tree type)
}
/* Returns the FUNCTION_TYPE TYPE with its function-cv-quals changed to
- MEMFN_QUALS. */
+ MEMFN_QUALS and its ref-qualifier to RQUAL. */
tree
-apply_memfn_quals (tree type, cp_cv_quals memfn_quals)
+apply_memfn_quals (tree type, cp_cv_quals memfn_quals, cp_ref_qualifier rqual)
{
/* Could handle METHOD_TYPE here if necessary. */
gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
- if (TYPE_QUALS (type) == memfn_quals)
+ if (TYPE_QUALS (type) == memfn_quals
+ && type_memfn_rqual (type) == rqual)
return type;
+
/* This should really have a different TYPE_MAIN_VARIANT, but that gets
complex. */
- return build_qualified_type (type, memfn_quals);
+ tree result = build_qualified_type (type, memfn_quals);
+ result = build_exception_variant (result, TYPE_RAISES_EXCEPTIONS (type));
+ return build_ref_qualified_type (result, rqual);
}
/* Returns nonzero if TYPE is const or volatile. */
@@ -1708,7 +1708,24 @@ build_m_component_ref (tree datum, tree component, tsubst_flags_t complain)
return datum;
}
else
- return build2 (OFFSET_REF, type, datum, component);
+ {
+ /* 5.5/6: In a .* expression whose object expression is an rvalue, the
+ program is ill-formed if the second operand is a pointer to member
+ function with ref-qualifier &. In a .* expression whose object
+ expression is an lvalue, the program is ill-formed if the second
+ operand is a pointer to member function with ref-qualifier &&. */
+ if (FUNCTION_REF_QUALIFIED (type))
+ {
+ bool lval = real_lvalue_p (datum);
+ if (lval && FUNCTION_RVALUE_QUALIFIED (type))
+ error ("pointer-to-member-function type %qT requires an rvalue",
+ ptrmem_type);
+ else if (!lval && !FUNCTION_RVALUE_QUALIFIED (type))
+ error ("pointer-to-member-function type %qT requires an lvalue",
+ ptrmem_type);
+ }
+ return build2 (OFFSET_REF, type, datum, component);
+ }
}
/* Return a tree node for the expression TYPENAME '(' PARMS ')'. */
new file mode 100644
@@ -0,0 +1,30 @@
+// { dg-require-effective-target c++11 }
+
+template <class,class> struct ST;
+template <class T> struct ST<T,T> {};
+
+struct A
+{
+ int f() &;
+ char f() &&;
+};
+
+template <class T> struct B
+{
+ int f() &;
+ char f() &&;
+};
+
+int main()
+{
+ A a;
+ a.f();
+ A().f();
+ ST<decltype(a.f()), int>();
+ ST<decltype(A().f()), char>();
+ B<int> b;
+ b.f();
+ B<int>().f();
+ ST<decltype(b.f()), int>();
+ ST<decltype(B<int>().f()), char>();
+}
new file mode 100644
@@ -0,0 +1,75 @@
+// In a .* expression whose object expression is an rvalue, the program is
+// ill-formed if the second operand is a pointer to member function with
+// ref-qualifier &. In a .* expression whose object expression is an
+// lvalue, the program is ill-formed if the second operand is a pointer to
+// member function with ref-qualifier &&.
+
+// { dg-require-effective-target c++11 }
+
+struct A {
+ void f() &;
+ void g() &&;
+ void h();
+};
+
+void one()
+{
+ A a;
+
+ void (A::*p)() & = &A::f;
+ (a.*p)();
+ (A().*p)(); // { dg-error "" }
+
+ p = &A::g; // { dg-error "" }
+ p = &A::h; // { dg-error "" }
+
+ void (A::*p2)() && = &A::g;
+ (A().*p2)();
+ (a.*p2)(); // { dg-error "" }
+ p2 = &A::f; // { dg-error "" }
+ p2 = &A::h; // { dg-error "" }
+
+ void (A::*p3)() = &A::h;
+ (a.*p3)();
+ (A().*p3)();
+ p3 = &A::f; // { dg-error "" }
+ p3 = &A::g; // { dg-error "" }
+}
+
+template <class T>
+struct B {
+ void f() &;
+ void g() &&;
+ void h();
+};
+
+template <class T>
+void two()
+{
+ B<T> a;
+
+ void (B<T>::*p)() & = &B<T>::f;
+ (a.*p)();
+ (B<T>().*p)(); // { dg-error "" }
+
+ p = &B<T>::g; // { dg-error "" }
+ p = &B<T>::h; // { dg-error "" }
+
+ void (B<T>::*p2)() && = &B<T>::g;
+ (B<T>().*p2)();
+ (a.*p2)(); // { dg-error "" }
+ p2 = &B<T>::f; // { dg-error "" }
+ p2 = &B<T>::h; // { dg-error "" }
+
+ void (B<T>::*p3)() = &B<T>::h;
+ (a.*p3)();
+ (B<T>().*p3)();
+ p3 = &B<T>::f; // { dg-error "" }
+ p3 = &B<T>::g; // { dg-error "" }
+}
+
+int main()
+{
+ one();
+ two<int>();
+}
new file mode 100644
@@ -0,0 +1,29 @@
+// An explicitly defaulted function can have a ref-qualifier.
+
+// { dg-require-effective-target c++11 }
+
+struct A {
+ A& operator=(const A&) & = default;
+};
+
+template<class T>
+struct B {
+ B& operator=(const B&) & = default;
+};
+
+template<class T>
+void f()
+{
+ B<T> b;
+ b = B<T>();
+ B<T>() = b; // { dg-error "" }
+}
+
+int main()
+{
+ A a;
+ a = A();
+ A() = a; // { dg-error "" }
+
+ f<int>();
+}
new file mode 100644
@@ -0,0 +1,14 @@
+// 12.1: A constructor shall not be declared with a ref-qualifier.
+// 12.4: A destructor shall not be declared with a ref-qualifier.
+
+// { dg-require-effective-target c++11 }
+
+struct A {
+ A() & = default; // { dg-error "constructor" }
+ ~A() & = default; // { dg-error "destructor" }
+};
+
+int main()
+{
+ A a;
+}
new file mode 100644
@@ -0,0 +1,13 @@
+// 13.1: ...cannot be overloaded if any of them, but not all, have a
+// ref-qualifier.
+
+// { dg-require-effective-target c++11 }
+
+class Y {
+ void h() &;
+ void h() const &; // OK
+ void h() &&; // OK, all declarations have a ref-qualifier
+ void i() &; // { dg-message "" }
+ void i() const; // { dg-error "" } prior declaration of i
+ // has a ref-qualifier
+};
new file mode 100644
@@ -0,0 +1,15 @@
+// Binding an rvalue to && beats binding it to const& (13.3.3.2).
+
+// { dg-require-effective-target c++11 }
+
+struct A
+{
+ int operator+(int) &&;
+};
+
+void operator+ (const A&, int);
+
+int main()
+{
+ return A() + 42;
+}
new file mode 100644
@@ -0,0 +1,19 @@
+// typedef test
+// { dg-require-effective-target c++11 }
+
+typedef void F() &;
+
+F f; // { dg-error "" }
+F* p; // { dg-error "" }
+extern F& r; // { dg-error "" }
+
+struct A {
+ F f;
+};
+
+int main()
+{
+ A a;
+ a.f();
+ A().f(); // { dg-error "" }
+}
new file mode 100644
@@ -0,0 +1,13 @@
+// { dg-require-effective-target c++11 }
+
+struct A
+{
+ virtual void f() & = 0;
+};
+
+struct B: A
+{
+ void f(); // doesn't override
+};
+
+B b; // { dg-error "abstract" }
commit f9aef3ebd305a8c1f473f300025f1dcc9fbe4fbf
Author: Jason Merrill <jason@redhat.com>
Date: Mon Apr 1 13:45:05 2013 -0400
* cxx-pretty-print.h (pp_cxx_cv_qualifiers): New.
* class.c (same_signature_p): Use type_memfn_quals.
* cp-tree.h (TYPE_RAISES_EXCEPTIONS): Use
FUNCTION_OR_METHOD_TYPE_CHECK.
* error.c (dump_type_suffix): Add padding before cv-qualifiers.
* pt.c (unify): Use static_fn_type.
@@ -2066,14 +2066,12 @@ same_signature_p (const_tree fndecl, const_tree base_fndecl)
&& same_type_p (DECL_CONV_FN_TYPE (fndecl),
DECL_CONV_FN_TYPE (base_fndecl))))
{
- tree types, base_types;
- types = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
- base_types = TYPE_ARG_TYPES (TREE_TYPE (base_fndecl));
- if ((cp_type_quals (TREE_TYPE (TREE_VALUE (base_types)))
- == cp_type_quals (TREE_TYPE (TREE_VALUE (types))))
- && (type_memfn_rqual (TREE_TYPE (fndecl))
- == type_memfn_rqual (TREE_TYPE (base_fndecl)))
- && compparms (TREE_CHAIN (base_types), TREE_CHAIN (types)))
+ tree fntype = TREE_TYPE (fndecl);
+ tree base_fntype = TREE_TYPE (base_fndecl);
+ if (type_memfn_quals (fntype) == type_memfn_quals (base_fntype)
+ && type_memfn_rqual (fntype) == type_memfn_rqual (base_fntype)
+ && compparms (FUNCTION_FIRST_USER_PARMTYPE (fndecl),
+ FUNCTION_FIRST_USER_PARMTYPE (base_fndecl)))
return 1;
}
return 0;
@@ -1888,7 +1888,8 @@ struct GTY((variable_size)) lang_type {
a deferred noexcept-specification, TREE_PURPOSE is a DEFERRED_NOEXCEPT
(for templates) or an OVERLOAD list of functions (for implicitly
declared functions). */
-#define TYPE_RAISES_EXCEPTIONS(NODE) TYPE_LANG_SLOT_1 (NODE)
+#define TYPE_RAISES_EXCEPTIONS(NODE) \
+ TYPE_LANG_SLOT_1 (FUNCTION_OR_METHOD_TYPE_CHECK (NODE))
/* For FUNCTION_TYPE or METHOD_TYPE, return 1 iff it is declared `throw()'
or noexcept(true). */
@@ -42,6 +42,8 @@ typedef struct
#define pp_cxx_cv_qualifier_seq(PP, T) \
pp_c_type_qualifier_list (pp_c_base (PP), T)
+#define pp_cxx_cv_qualifiers(PP, CV) \
+ pp_c_cv_qualifiers (pp_c_base (PP), CV, false)
#define pp_cxx_whitespace(PP) pp_c_whitespace (pp_c_base (PP))
#define pp_cxx_left_paren(PP) pp_c_left_paren (pp_c_base (PP))
@@ -829,10 +829,8 @@ dump_type_suffix (tree t, int flags)
anyway; they may in g++, but we'll just pretend otherwise. */
dump_parameters (arg, flags & ~TFF_FUNCTION_DEFAULT_ARGUMENTS);
- if (TREE_CODE (t) == METHOD_TYPE)
- pp_cxx_cv_qualifier_seq (cxx_pp, class_of_this_parm (t));
- else
- pp_cxx_cv_qualifier_seq (cxx_pp, t);
+ pp_base (cxx_pp)->padding = pp_before;
+ pp_cxx_cv_qualifiers (cxx_pp, type_memfn_quals (t));
dump_ref_qualifier (t, flags);
dump_exception_spec (TYPE_RAISES_EXCEPTIONS (t), flags);
dump_type_suffix (TREE_TYPE (t), flags);
@@ -17085,9 +17085,6 @@ unify (tree tparms, tree targs, tree parm, tree arg, int strict,
deduces the type of the member as a function type. */
if (TYPE_PTRMEMFUNC_P (arg))
{
- tree method_type;
- tree fntype;
-
/* Check top-level cv qualifiers */
if (!check_cv_quals_for_unify (UNIFY_ALLOW_NONE, arg, parm))
return unify_cv_qual_mismatch (explain_p, parm, arg);
@@ -17097,17 +17094,8 @@ unify (tree tparms, tree targs, tree parm, tree arg, int strict,
UNIFY_ALLOW_NONE, explain_p);
/* Determine the type of the function we are unifying against. */
- method_type = TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (arg));
- fntype =
- build_function_type (TREE_TYPE (method_type),
- TREE_CHAIN (TYPE_ARG_TYPES (method_type)));
-
- /* Extract the cv-qualifiers and ref-qualifier of the member
- function from the implicit object parameter and place them
- on the function type to be restored later. */
- fntype = apply_memfn_quals (fntype,
- type_memfn_quals (method_type),
- type_memfn_rqual (method_type));
+ tree fntype = static_fn_type (arg);
+
return unify (tparms, targs, TREE_TYPE (parm), fntype, strict, explain_p);
}
commit 6a69704d6788915ae9773c993d9d6582dc1fd2e4
Author: Jason Merrill <jason@redhat.com>
Date: Fri Mar 29 21:07:38 2013 -0400
* call.c (add_function_candidate): Take the address of 'this' here.
(build_over_call): And here.
(build_new_method_call_1, build_op_call_1): Not here.
(build_user_type_conversion_1): Or here.
(add_candidates): Adjust.
@@ -1959,11 +1959,13 @@ add_function_candidate (struct z_candidate **candidates,
object parameter has reference type. */
bool rv = FUNCTION_RVALUE_QUALIFIED (TREE_TYPE (fn));
parmtype = cp_build_reference_type (parmtype, rv);
- arg = build_fold_indirect_ref (arg);
- argtype = lvalue_type (arg);
}
else
- parmtype = build_pointer_type (parmtype);
+ {
+ parmtype = build_pointer_type (parmtype);
+ arg = build_this (arg);
+ argtype = lvalue_type (arg);
+ }
}
/* Core issue 899: When [copy-]initializing a temporary to be bound
@@ -3460,6 +3462,7 @@ build_user_type_conversion_1 (tree totype, tree expr, int flags,
int ctorflags = flags;
first_arg = build_int_cst (build_pointer_type (totype), 0);
+ first_arg = build_fold_indirect_ref (first_arg);
/* We should never try to call the abstract or base constructor
from here. */
@@ -3501,7 +3504,7 @@ build_user_type_conversion_1 (tree totype, tree expr, int flags,
}
if (conv_fns)
- first_arg = build_this (expr);
+ first_arg = expr;
for (; conv_fns; conv_fns = TREE_CHAIN (conv_fns))
{
@@ -4079,7 +4082,7 @@ build_op_call_1 (tree obj, vec<tree, va_gc> **args, tsubst_flags_t complain)
if (fns)
{
- first_mem_arg = build_this (obj);
+ first_mem_arg = obj;
add_candidates (BASELINK_FUNCTIONS (fns),
first_mem_arg, *args, NULL_TREE,
@@ -4936,7 +4939,7 @@ add_candidates (tree fns, tree first_arg, const vec<tree, va_gc> *args,
is considered to be a member of the class of the implicit
object argument for the purpose of defining the type of
the implicit object parameter. */
- ctype = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (first_arg)));
+ ctype = TYPE_MAIN_VARIANT (TREE_TYPE (first_arg));
}
else
{
@@ -4990,7 +4993,7 @@ add_candidates (tree fns, tree first_arg, const vec<tree, va_gc> *args,
for (ix = 1; args->iterate (ix, &arg); ++ix)
tempvec->quick_push (arg);
non_static_args = tempvec;
- first_arg = build_this ((*args)[0]);
+ first_arg = (*args)[0];
}
fn_first_arg = first_arg;
@@ -6722,16 +6725,18 @@ build_over_call (struct z_candidate *cand, int flags, tsubst_flags_t complain)
resolution, and must be of the proper type. */
if (DECL_CONSTRUCTOR_P (fn))
{
+ tree object_arg;
if (first_arg != NULL_TREE)
{
- argarray[j++] = first_arg;
+ object_arg = first_arg;
first_arg = NULL_TREE;
}
else
{
- argarray[j++] = (*args)[arg_index];
+ object_arg = (*args)[arg_index];
++arg_index;
}
+ argarray[j++] = build_this (object_arg);
parm = TREE_CHAIN (parm);
/* We should never try to call the abstract constructor. */
gcc_assert (!DECL_HAS_IN_CHARGE_PARM_P (fn));
@@ -6747,9 +6752,9 @@ build_over_call (struct z_candidate *cand, int flags, tsubst_flags_t complain)
else if (TREE_CODE (TREE_TYPE (fn)) == METHOD_TYPE)
{
tree parmtype = TREE_VALUE (parm);
- tree arg = (first_arg != NULL_TREE
- ? first_arg
- : (*args)[arg_index]);
+ tree arg = build_this (first_arg != NULL_TREE
+ ? first_arg
+ : (*args)[arg_index]);
tree argtype = TREE_TYPE (arg);
tree converted_arg;
tree base_binfo;
@@ -7411,7 +7416,6 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
tree access_binfo;
tree optype;
tree first_mem_arg = NULL_TREE;
- tree instance_ptr;
tree name;
bool skip_first_for_error;
vec<tree, va_gc> *user_args;
@@ -7519,22 +7523,27 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
return error_mark_node;
}
- instance_ptr = build_this (instance);
+ /* Consider the object argument to be used even if we end up selecting a
+ static member function. */
+ instance = mark_type_use (instance);
/* It's OK to call destructors and constructors on cv-qualified objects.
- Therefore, convert the INSTANCE_PTR to the unqualified type, if
+ Therefore, convert the INSTANCE to the unqualified type, if
necessary. */
if (DECL_DESTRUCTOR_P (fn)
|| DECL_CONSTRUCTOR_P (fn))
{
- tree type = build_pointer_type (basetype);
- if (!same_type_p (type, TREE_TYPE (instance_ptr)))
- instance_ptr = build_nop (type, instance_ptr);
+ if (!same_type_p (basetype, TREE_TYPE (instance)))
+ {
+ instance = build_this (instance);
+ instance = build_nop (build_pointer_type (basetype), instance);
+ instance = build_fold_indirect_ref (instance);
+ }
}
if (DECL_DESTRUCTOR_P (fn))
name = complete_dtor_identifier;
- first_mem_arg = instance_ptr;
+ first_mem_arg = instance;
/* Get the high-water mark for the CONVERSION_OBSTACK. */
p = conversion_obstack_alloc (0);
@@ -7570,11 +7579,10 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
if (init)
{
- tree ob;
- if (integer_zerop (instance_ptr))
+ if (TREE_CODE (instance) == INDIRECT_REF
+ && integer_zerop (TREE_OPERAND (instance, 0)))
return get_target_expr_sfinae (init, complain);
- ob = build_fold_indirect_ref (instance_ptr);
- init = build2 (INIT_EXPR, TREE_TYPE (ob), ob, init);
+ init = build2 (INIT_EXPR, TREE_TYPE (instance), instance, init);
TREE_SIDE_EFFECTS (init) = true;
return init;
}
@@ -7599,11 +7607,11 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
if (complain & tf_error)
{
if (!COMPLETE_OR_OPEN_TYPE_P (basetype))
- cxx_incomplete_type_error (instance_ptr, basetype);
+ cxx_incomplete_type_error (instance, basetype);
else if (optype)
error ("no matching function for call to %<%T::operator %T(%A)%#V%>",
basetype, optype, build_tree_list_vec (user_args),
- TREE_TYPE (TREE_TYPE (instance_ptr)));
+ TREE_TYPE (instance));
else
{
char *pretty_name;
@@ -7616,7 +7624,7 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
arglist = TREE_CHAIN (arglist);
error ("no matching function for call to %<%T::%s(%A)%#V%>",
basetype, pretty_name, arglist,
- TREE_TYPE (TREE_TYPE (instance_ptr)));
+ TREE_TYPE (instance));
if (free_p)
free (pretty_name);
}
@@ -7666,7 +7674,7 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
fn);
if (TREE_CODE (TREE_TYPE (fn)) == METHOD_TYPE
- && is_dummy_object (instance_ptr))
+ && is_dummy_object (instance))
{
instance = maybe_resolve_dummy (instance);
if (instance == error_mark_node)
@@ -7675,8 +7683,7 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
{
/* We captured 'this' in the current lambda now that
we know we really need it. */
- instance_ptr = build_this (instance);
- cand->first_arg = instance_ptr;
+ cand->first_arg = instance;
}
else
{
@@ -7711,10 +7718,10 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
out to be a static member function, `a' is
none-the-less evaluated. */
if (TREE_CODE (TREE_TYPE (fn)) != METHOD_TYPE
- && !is_dummy_object (instance_ptr)
- && TREE_SIDE_EFFECTS (instance_ptr))
+ && !is_dummy_object (instance)
+ && TREE_SIDE_EFFECTS (instance))
call = build2 (COMPOUND_EXPR, TREE_TYPE (call),
- instance_ptr, call);
+ instance, call);
else if (call != error_mark_node
&& DECL_DESTRUCTOR_P (cand->fn)
&& !VOID_TYPE_P (TREE_TYPE (call)))
This patch implements the last major missing bullet point in the C++11 features list, support for ref-qualifiers to allow member functions to apply to either lvalues or rvalues only: struct A { void f() &; // requires an lvalue void g() &&; // requires an rvalue }; Bronek did most of the work months back, but it took a long time to get his copyright assignment processed, and since that was taken care of he hasn't had time to finish the work, so I've done the last bits. Thanks a lot! I was surprised how contained the changes to implement the overload resolution were; I just needed a few lines in add_function_candidate. But relying on build_fold_indirect_ref to undo the effect of build_this fragile, so on the trunk I'm going to defer build_this until we're actually doing the conversions. The third commit in the patch does that. The second commit in the patch is some cleanups I noticed while working on this to make things more tidy. Applying everything to trunk, first commit to 4.8.