bool
cp_function_decl_explicit_p (tree decl)
{
return (decl
&& DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
&& DECL_NONCONVERTING_P (decl));
}
bool
cp_function_decl_deleted_p (tree decl)
{
return (decl
&& DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
&& DECL_DELETED_FN (decl));
}
bool
cp_function_decl_explicit_p (tree decl)
{
return (decl
&& FUNCTION_FIRST_USER_PARMTYPE (decl) != void_list_node
&& DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
&& DECL_NONCONVERTING_P (decl));
}
tree
lambda_function (tree lambda)
{
tree type;
if (TREE_CODE (lambda) == LAMBDA_EXPR)
type = LAMBDA_EXPR_CLOSURE (lambda);
else
type = lambda;
gcc_assert (LAMBDA_TYPE_P (type));
/* Don't let debug_tree cause instantiation. */
if (CLASSTYPE_TEMPLATE_INSTANTIATION (type)
&& !COMPLETE_OR_OPEN_TYPE_P (type))
return NULL_TREE;
lambda = lookup_member (type, ansi_opname (CALL_EXPR),
/*protect=*/0, /*want_type=*/false,
tf_warning_or_error);
if (lambda)
lambda = STRIP_TEMPLATE (get_first_fn (lambda));
return lambda;
}
void
maybe_add_lambda_conv_op (tree type)
{
bool nested = (current_function_decl != NULL_TREE);
tree callop = lambda_function (type);
if (LAMBDA_EXPR_CAPTURE_LIST (CLASSTYPE_LAMBDA_EXPR (type)) != NULL_TREE)
return;
if (processing_template_decl)
return;
bool const generic_lambda_p
= (DECL_TEMPLATE_INFO (callop)
&& DECL_TEMPLATE_RESULT (DECL_TI_TEMPLATE (callop)) == callop);
if (!generic_lambda_p && DECL_INITIAL (callop) == NULL_TREE)
{
/* If the op() wasn't instantiated due to errors, give up. */
gcc_assert (errorcount || sorrycount);
return;
}
/* Non-template conversion operators are defined directly with build_call_a
and using DIRECT_ARGVEC for arguments (including 'this'). Templates are
deferred and the CALL is built in-place. In the case of a deduced return
call op, the decltype expression, DECLTYPE_CALL, used as a substitute for
the return type is also built in-place. The arguments of DECLTYPE_CALL in
the return expression may differ in flags from those in the body CALL. In
particular, parameter pack expansions are marked PACK_EXPANSION_LOCAL_P in
the body CALL, but not in DECLTYPE_CALL. */
vec<tree, va_gc> *direct_argvec = 0;
tree decltype_call = 0, call = 0;
tree fn_result = TREE_TYPE (TREE_TYPE (callop));
if (generic_lambda_p)
{
/* Prepare the dependent member call for the static member function
'_FUN' and, potentially, prepare another call to be used in a decltype
return expression for a deduced return call op to allow for simple
implementation of the conversion operator. */
tree instance = build_nop (type, null_pointer_node);
tree objfn = build_min (COMPONENT_REF, NULL_TREE,
instance, DECL_NAME (callop), NULL_TREE);
int nargs = list_length (DECL_ARGUMENTS (callop)) - 1;
call = prepare_op_call (objfn, nargs);
if (type_uses_auto (fn_result))
decltype_call = prepare_op_call (objfn, nargs);
}
else
{
direct_argvec = make_tree_vector ();
direct_argvec->quick_push (build1 (NOP_EXPR,
TREE_TYPE (DECL_ARGUMENTS (callop)),
null_pointer_node));
}
/* Copy CALLOP's argument list (as per 'copy_list') as FN_ARGS in order to
declare the static member function "_FUN" below. For each arg append to
DIRECT_ARGVEC (for the non-template case) or populate the pre-allocated
call args (for the template case). If a parameter pack is found, expand
it, flagging it as PACK_EXPANSION_LOCAL_P for the body call. */
tree fn_args = NULL_TREE;
{
int ix = 0;
tree src = DECL_CHAIN (DECL_ARGUMENTS (callop));
tree tgt;
while (src)
{
tree new_node = copy_node (src);
if (!fn_args)
fn_args = tgt = new_node;
else
{
TREE_CHAIN (tgt) = new_node;
tgt = new_node;
}
mark_exp_read (tgt);
if (generic_lambda_p)
{
if (DECL_PACK_P (tgt))
{
tree a = make_pack_expansion (tgt);
if (decltype_call)
CALL_EXPR_ARG (decltype_call, ix) = copy_node (a);
PACK_EXPANSION_LOCAL_P (a) = true;
CALL_EXPR_ARG (call, ix) = a;
}
else
{
tree a = convert_from_reference (tgt);
CALL_EXPR_ARG (call, ix) = a;
if (decltype_call)
CALL_EXPR_ARG (decltype_call, ix) = copy_node (a);
}
++ix;
}
else
vec_safe_push (direct_argvec, tgt);
src = TREE_CHAIN (src);
}
}
if (generic_lambda_p)
{
if (decltype_call)
{
++processing_template_decl;
fn_result = finish_decltype_type
(decltype_call, /*id_expression_or_member_access_p=*/false,
tf_warning_or_error);
--processing_template_decl;
}
}
else
call = build_call_a (callop,
direct_argvec->length (),
direct_argvec->address ());
CALL_FROM_THUNK_P (call) = 1;
tree stattype = build_function_type (fn_result, FUNCTION_ARG_CHAIN (callop));
/* First build up the conversion op. */
tree rettype = build_pointer_type (stattype);
tree name = mangle_conv_op_name_for_type (rettype);
tree thistype = cp_build_qualified_type (type, TYPE_QUAL_CONST);
tree fntype = build_method_type_directly (thistype, rettype, void_list_node);
tree convfn = build_lang_decl (FUNCTION_DECL, name, fntype);
tree fn = convfn;
DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop);
if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
&& DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
SET_OVERLOADED_OPERATOR_CODE (fn, TYPE_EXPR);
grokclassfn (type, fn, NO_SPECIAL);
set_linkage_according_to_type (type, fn);
rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof);
DECL_IN_AGGR_P (fn) = 1;
DECL_ARTIFICIAL (fn) = 1;
DECL_NOT_REALLY_EXTERN (fn) = 1;
DECL_DECLARED_INLINE_P (fn) = 1;
DECL_ARGUMENTS (fn) = build_this_parm (fntype, TYPE_QUAL_CONST);
if (nested)
DECL_INTERFACE_KNOWN (fn) = 1;
if (generic_lambda_p)
fn = add_inherited_template_parms (fn, DECL_TI_TEMPLATE (callop));
add_method (type, fn, NULL_TREE);
/* Generic thunk code fails for varargs; we'll complain in mark_used if
the conversion op is used. */
if (varargs_function_p (callop))
{
DECL_DELETED_FN (STRIP_TEMPLATE (fn)) = 1;
return;
}
/* Now build up the thunk to be returned. */
name = get_identifier ("_FUN");
tree statfn = build_lang_decl (FUNCTION_DECL, name, stattype);
fn = statfn;
DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop);
if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
&& DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
grokclassfn (type, fn, NO_SPECIAL);
set_linkage_according_to_type (type, fn);
rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof);
DECL_IN_AGGR_P (fn) = 1;
DECL_ARTIFICIAL (fn) = 1;
DECL_NOT_REALLY_EXTERN (fn) = 1;
DECL_DECLARED_INLINE_P (fn) = 1;
DECL_STATIC_FUNCTION_P (fn) = 1;
DECL_ARGUMENTS (fn) = fn_args;
for (tree arg = fn_args; arg; arg = DECL_CHAIN (arg))
{
/* Avoid duplicate -Wshadow warnings. */
DECL_NAME (arg) = NULL_TREE;
DECL_CONTEXT (arg) = fn;
}
if (nested)
DECL_INTERFACE_KNOWN (fn) = 1;
if (generic_lambda_p)
fn = add_inherited_template_parms (fn, DECL_TI_TEMPLATE (callop));
add_method (type, fn, NULL_TREE);
if (nested)
push_function_context ();
else
/* Still increment function_depth so that we don't GC in the
middle of an expression. */
++function_depth;
/* Generate the body of the thunk. */
start_preparsed_function (statfn, NULL_TREE,
SF_PRE_PARSED | SF_INCLASS_INLINE);
if (DECL_ONE_ONLY (statfn))
{
/* Put the thunk in the same comdat group as the call op. */
symtab_add_to_same_comdat_group
(cgraph_get_create_node (statfn),
cgraph_get_create_node (callop));
}
tree body = begin_function_body ();
tree compound_stmt = begin_compound_stmt (0);
if (!generic_lambda_p)
{
set_flags_from_callee (call);
if (MAYBE_CLASS_TYPE_P (TREE_TYPE (call)))
call = build_cplus_new (TREE_TYPE (call), call, tf_warning_or_error);
}
call = convert_from_reference (call);
finish_return_stmt (call);
finish_compound_stmt (compound_stmt);
finish_function_body (body);
fn = finish_function (/*inline*/2);
if (!generic_lambda_p)
expand_or_defer_fn (fn);
/* Generate the body of the conversion op. */
start_preparsed_function (convfn, NULL_TREE,
SF_PRE_PARSED | SF_INCLASS_INLINE);
body = begin_function_body ();
compound_stmt = begin_compound_stmt (0);
/* decl_needed_p needs to see that it's used. */
TREE_USED (statfn) = 1;
finish_return_stmt (decay_conversion (statfn, tf_warning_or_error));
finish_compound_stmt (compound_stmt);
finish_function_body (body);
fn = finish_function (/*inline*/2);
if (!generic_lambda_p)
expand_or_defer_fn (fn);
if (nested)
pop_function_context ();
else
--function_depth;
}
/* Return -1 if dwarf ATTR shouldn't be added for DECL, or the attribute
value otherwise. */
int
cp_decl_dwarf_attribute (const_tree decl, int attr)
{
if (decl == NULL_TREE)
return -1;
switch (attr)
{
case DW_AT_explicit:
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
&& DECL_NONCONVERTING_P (decl))
return 1;
break;
case DW_AT_deleted:
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
&& DECL_DELETED_FN (decl))
return 1;
break;
case DW_AT_defaulted:
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
&& DECL_DEFAULTED_FN (decl))
{
if (DECL_DEFAULTED_IN_CLASS_P (decl))
return DW_DEFAULTED_in_class;
if (DECL_DEFAULTED_OUTSIDE_CLASS_P (decl))
return DW_DEFAULTED_out_of_class;
}
break;
case DW_AT_const_expr:
if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
return 1;
break;
case DW_AT_reference:
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
&& FUNCTION_REF_QUALIFIED (TREE_TYPE (decl))
&& !FUNCTION_RVALUE_QUALIFIED (TREE_TYPE (decl)))
return 1;
break;
case DW_AT_rvalue_reference:
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
&& FUNCTION_REF_QUALIFIED (TREE_TYPE (decl))
&& FUNCTION_RVALUE_QUALIFIED (TREE_TYPE (decl)))
return 1;
break;
case DW_AT_inline:
if (VAR_P (decl) && DECL_INLINE_VAR_P (decl))
{
if (DECL_VAR_DECLARED_INLINE_P (decl))
return DW_INL_declared_inlined;
else
return DW_INL_inlined;
}
break;
case DW_AT_export_symbols:
if (TREE_CODE (decl) == NAMESPACE_DECL
&& (DECL_NAMESPACE_INLINE_P (decl)
|| (DECL_NAME (decl) == NULL_TREE && dwarf_version >= 5)))
return 1;
break;
default:
break;
}
return -1;
}
