/* Build expressions with type checking for C++ compiler.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
Hacked by Michael Tiemann (tiemann@cygnus.com)
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
/* This file is part of the C++ front end.
static bool comp_array_types (tree, tree, bool);
static tree common_base_type (tree, tree);
static tree pointer_diff (tree, tree, tree);
-static tree get_delta_difference (tree, tree, int);
+static tree get_delta_difference (tree, tree, bool, bool);
static void casts_away_constness_r (tree *, tree *);
static bool casts_away_constness (tree, tree);
static void maybe_warn_about_returning_address_of_local (tree);
static tree lookup_destructor (tree, tree, tree);
-
-/* Return the target type of TYPE, which means return T for:
- T*, T&, T[], T (...), and otherwise, just T. */
-
-tree
-target_type (tree type)
-{
- type = non_reference (type);
- while (TREE_CODE (type) == POINTER_TYPE
- || TREE_CODE (type) == ARRAY_TYPE
- || TREE_CODE (type) == FUNCTION_TYPE
- || TREE_CODE (type) == METHOD_TYPE
- || TYPE_PTRMEM_P (type))
- type = TREE_TYPE (type);
- return type;
-}
+static tree convert_arguments (tree, tree, tree, int);
/* Do `exp = require_complete_type (exp);' to make sure exp
does not have an incomplete type. (That includes void types.)
}
/* Like complete_type, but issue an error if the TYPE cannot be completed.
- VALUE is used for informative diagnostics. DIAG_TYPE indicates the type
- of diagnostic: 0 for an error, 1 for a warning, 2 for a pedwarn.
+ VALUE is used for informative diagnostics.
Returns NULL_TREE if the type cannot be made complete. */
tree
-complete_type_or_diagnostic (tree type, tree value, int diag_type)
+complete_type_or_else (tree type, tree value)
{
type = complete_type (type);
if (type == error_mark_node)
return NULL_TREE;
else if (!COMPLETE_TYPE_P (type))
{
- cxx_incomplete_type_diagnostic (value, type, diag_type);
+ cxx_incomplete_type_diagnostic (value, type, 0);
return NULL_TREE;
}
else
As an optimization, free the space we allocate if the parameter
lists are already common. */
-tree
+static tree
commonparms (tree p1, tree p2)
{
tree oldargs = p1, newargs, n;
tree attributes;
/* FIXME: Attributes. */
- gcc_assert (ARITHMETIC_TYPE_P (t1)
+ gcc_assert (ARITHMETIC_TYPE_P (t1)
|| TREE_CODE (t1) == COMPLEX_TYPE
+ || TREE_CODE (t1) == VECTOR_TYPE
|| TREE_CODE (t1) == ENUMERAL_TYPE);
- gcc_assert (ARITHMETIC_TYPE_P (t2)
+ gcc_assert (ARITHMETIC_TYPE_P (t2)
|| TREE_CODE (t2) == COMPLEX_TYPE
+ || TREE_CODE (t1) == VECTOR_TYPE
|| TREE_CODE (t2) == ENUMERAL_TYPE);
/* In what follows, we slightly generalize the rules given in [expr] so
attributes);
}
+ if (code1 == VECTOR_TYPE)
+ {
+ /* When we get here we should have two vectors of the same size.
+ Just prefer the unsigned one if present. */
+ if (TYPE_UNSIGNED (t1))
+ return build_type_attribute_variant (t1, attributes);
+ else
+ return build_type_attribute_variant (t2, attributes);
+ }
+
/* If only one is real, use it as the result. */
if (code1 == REAL_TYPE && code2 != REAL_TYPE)
return build_type_attribute_variant (t1, attributes);
convert to a long long. Otherwise, convert to an unsigned long
long. Otherwise, if either operand is long long, convert the
other to long long.
-
+
Since we're here, we know the TYPE_PRECISION is the same;
therefore converting to long long cannot represent all the values
of an unsigned long, so we choose unsigned long long in that
|| same_type_p (TYPE_MAIN_VARIANT (t2), long_long_integer_type_node))
{
tree t = ((TYPE_UNSIGNED (t1) || TYPE_UNSIGNED (t2))
- ? long_long_unsigned_type_node
+ ? long_long_unsigned_type_node
: long_long_integer_type_node);
return build_type_attribute_variant (t, attributes);
}
-
+
/* Go through the same procedure, but for longs. */
if (same_type_p (TYPE_MAIN_VARIANT (t1), long_unsigned_type_node)
|| same_type_p (TYPE_MAIN_VARIANT (t2), long_unsigned_type_node))
|| same_type_p (TYPE_MAIN_VARIANT (t2), float_type_node))
return build_type_attribute_variant (float_type_node,
attributes);
-
+
/* Two floating-point types whose TYPE_MAIN_VARIANTs are none of
- the standard C++ floating-point types. Logic earlier in this
- function has already eliminated the possibility that
- TYPE_PRECISION (t2) != TYPE_PRECISION (t1), so there's no
- compelling reason to choose one or the other. */
+ the standard C++ floating-point types. Logic earlier in this
+ function has already eliminated the possibility that
+ TYPE_PRECISION (t2) != TYPE_PRECISION (t1), so there's no
+ compelling reason to choose one or the other. */
return build_type_attribute_variant (t1, attributes);
}
}
result_type = composite_pointer_type_r (pointee1, pointee2, location);
else
{
- pedwarn ("%s between distinct pointer types `%T' and `%T' "
+ pedwarn ("%s between distinct pointer types %qT and %qT "
"lacks a cast",
location, t1, t2);
result_type = void_type_node;
{
if (!same_type_p (TYPE_PTRMEM_CLASS_TYPE (t1),
TYPE_PTRMEM_CLASS_TYPE (t2)))
- pedwarn ("%s between distinct pointer types `%T' and `%T' "
+ pedwarn ("%s between distinct pointer types %qT and %qT "
"lacks a cast",
location, t1, t2);
result_type = build_ptrmem_type (TYPE_PTRMEM_CLASS_TYPE (t1),
/* Return the composite pointer type (see [expr.rel]) for T1 and T2.
ARG1 and ARG2 are the values with those types. The LOCATION is a
- string describing the current location, in case an error occurs.
+ string describing the current location, in case an error occurs.
This routine also implements the computation of a common type for
pointers-to-members as per [expr.eq]. */
-tree
+tree
composite_pointer_type (tree t1, tree t2, tree arg1, tree arg2,
const char* location)
{
return t2;
if (null_ptr_cst_p (arg2))
return t1;
-
+
/* We have:
[expr.rel]
tree result_type;
if (pedantic && TYPE_PTRFN_P (t2))
- pedwarn ("ISO C++ forbids %s between pointer of type `void *' and pointer-to-function", location);
- result_type
+ pedwarn ("ISO C++ forbids %s between pointer of type %<void *%> "
+ "and pointer-to-function", location);
+ result_type
= cp_build_qualified_type (void_type_node,
(cp_type_quals (TREE_TYPE (t1))
| cp_type_quals (TREE_TYPE (t2))));
return build_type_attribute_variant (result_type, attributes);
}
+ if (c_dialect_objc () && TREE_CODE (t1) == POINTER_TYPE
+ && TREE_CODE (t2) == POINTER_TYPE)
+ {
+ if (objc_compare_types (t1, t2, -3, NULL_TREE))
+ return t1;
+ }
+
/* [expr.eq] permits the application of a pointer conversion to
bring the pointers to a common type. */
if (TREE_CODE (t1) == POINTER_TYPE && TREE_CODE (t2) == POINTER_TYPE
class2 = TREE_TYPE (t2);
if (DERIVED_FROM_P (class1, class2))
- t2 = (build_pointer_type
+ t2 = (build_pointer_type
(cp_build_qualified_type (class1, TYPE_QUALS (class2))));
else if (DERIVED_FROM_P (class2, class1))
- t1 = (build_pointer_type
+ t1 = (build_pointer_type
(cp_build_qualified_type (class2, TYPE_QUALS (class1))));
else
{
- error ("%s between distinct pointer types `%T' and `%T' "
+ error ("%s between distinct pointer types %qT and %qT "
"lacks a cast", location, t1, t2);
return error_mark_node;
}
t2 = build_ptrmem_type (class1, TYPE_PTRMEM_POINTED_TO_TYPE (t2));
else
{
- error ("%s between distinct pointer-to-member types `%T' and `%T' "
+ error ("%s between distinct pointer-to-member types %qT and %qT "
"lacks a cast", location, t1, t2);
return error_mark_node;
}
code2 = TREE_CODE (t2);
if ((ARITHMETIC_TYPE_P (t1) || code1 == ENUMERAL_TYPE
- || code1 == COMPLEX_TYPE)
+ || code1 == COMPLEX_TYPE || code1 == VECTOR_TYPE)
&& (ARITHMETIC_TYPE_P (t2) || code2 == ENUMERAL_TYPE
- || code2 == COMPLEX_TYPE))
+ || code2 == COMPLEX_TYPE || code2 == VECTOR_TYPE))
return type_after_usual_arithmetic_conversions (t1, t2);
else if ((TYPE_PTR_P (t1) && TYPE_PTR_P (t2))
/* Compare two exception specifier types for exactness or subsetness, if
allowed. Returns false for mismatch, true for match (same, or
derived and !exact).
-
+
[except.spec] "If a class X ... objects of class X or any class publicly
and unambiguously derived from X. Similarly, if a pointer type Y * ...
exceptions of type Y * or that are pointers to any type publicly and
[except.throw] and catch [except.catch] will do. They will ignore the
top level cv qualifiers, and allow qualifiers in the pointer to class
example.
-
+
We implement the letter of the standard. */
static bool
else if (!exact)
{
if (cp_type_quals (a) || cp_type_quals (b))
- return false;
-
+ return false;
+
if (TREE_CODE (a) == POINTER_TYPE
- && TREE_CODE (b) == POINTER_TYPE)
- {
- a = TREE_TYPE (a);
- b = TREE_TYPE (b);
- if (cp_type_quals (a) || cp_type_quals (b))
- return false;
- }
-
+ && TREE_CODE (b) == POINTER_TYPE)
+ {
+ a = TREE_TYPE (a);
+ b = TREE_TYPE (b);
+ if (cp_type_quals (a) || cp_type_quals (b))
+ return false;
+ }
+
if (TREE_CODE (a) != RECORD_TYPE
- || TREE_CODE (b) != RECORD_TYPE)
- return false;
-
- if (ACCESSIBLY_UNIQUELY_DERIVED_P (a, b))
- return true;
+ || TREE_CODE (b) != RECORD_TYPE)
+ return false;
+
+ if (PUBLICLY_UNIQUELY_DERIVED_P (a, b))
+ return true;
}
return false;
}
if (t1 == t2)
return true;
-
- if (t1 == NULL_TREE) /* T1 is ... */
+
+ if (t1 == NULL_TREE) /* T1 is ... */
return t2 == NULL_TREE || !exact;
- if (!TREE_VALUE (t1)) /* t1 is EMPTY */
+ if (!TREE_VALUE (t1)) /* t1 is EMPTY */
return t2 != NULL_TREE && !TREE_VALUE (t2);
- if (t2 == NULL_TREE) /* T2 is ... */
+ if (t2 == NULL_TREE) /* T2 is ... */
return false;
if (TREE_VALUE (t1) && !TREE_VALUE (t2)) /* T2 is EMPTY, T1 is not */
return !exact;
-
+
/* Neither set is ... or EMPTY, make sure each part of T2 is in T1.
Count how many we find, to determine exactness. For exact matching and
ordered T1, T2, this is an O(n) operation, otherwise its worst case is
for (base = t1; t2 != NULL_TREE; t2 = TREE_CHAIN (t2))
{
for (probe = base; probe != NULL_TREE; probe = TREE_CHAIN (probe))
- {
- tree a = TREE_VALUE (probe);
- tree b = TREE_VALUE (t2);
-
- if (comp_except_types (a, b, exact))
- {
- if (probe == base && exact)
- base = TREE_CHAIN (probe);
- length++;
- break;
- }
- }
+ {
+ tree a = TREE_VALUE (probe);
+ tree b = TREE_VALUE (t2);
+
+ if (comp_except_types (a, b, exact))
+ {
+ if (probe == base && exact)
+ base = TREE_CHAIN (probe);
+ length++;
+ break;
+ }
+ }
if (probe == NULL_TREE)
- return false;
+ return false;
}
return !exact || base == NULL_TREE || length == list_length (t1);
}
extern int a[];
int a[3];
- by [basic.link]:
+ by [basic.link]:
declarations for an array object can specify
array types that differ by the presence or absence of a major
&& !value_dependent_expression_p (max2))
{
/* With abi-1 we do not fold non-dependent array bounds, (and
- consequently mangle them incorrectly). We must therefore
- fold them here, to verify the domains have the same
- value. */
+ consequently mangle them incorrectly). We must therefore
+ fold them here, to verify the domains have the same
+ value. */
max1 = fold (max1);
max2 = fold (max2);
}
bool
comptypes (tree t1, tree t2, int strict)
{
- int retval;
-
if (t1 == t2)
return true;
/* Suppress errors caused by previously reported errors. */
if (t1 == error_mark_node || t2 == error_mark_node)
return false;
-
+
gcc_assert (TYPE_P (t1) && TYPE_P (t2));
-
+
/* TYPENAME_TYPEs should be resolved if the qualifying scope is the
current instantiation. */
if (TREE_CODE (t1) == TYPENAME_TYPE)
if (resolved != error_mark_node)
t1 = resolved;
}
-
+
if (TREE_CODE (t2) == TYPENAME_TYPE)
{
tree resolved = resolve_typename_type (t2, /*only_current_p=*/true);
&& TYPE_MAIN_VARIANT (t1) == TYPE_MAIN_VARIANT (t2))
return true;
- if (!(*targetm.comp_type_attributes) (t1, t2))
- return false;
-
+ /* Compare the types. Break out if they could be the same. */
switch (TREE_CODE (t1))
{
case TEMPLATE_TEMPLATE_PARM:
DECL_TEMPLATE_PARMS (TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL (t2))))
return false;
if (TREE_CODE (t1) == TEMPLATE_TEMPLATE_PARM)
- return true;
+ break;
/* Don't check inheritance. */
strict = COMPARE_STRICT;
/* Fall through. */
&& (TYPE_TI_TEMPLATE (t1) == TYPE_TI_TEMPLATE (t2)
|| TREE_CODE (t1) == BOUND_TEMPLATE_TEMPLATE_PARM)
&& comp_template_args (TYPE_TI_ARGS (t1), TYPE_TI_ARGS (t2)))
- return true;
-
+ break;
+
if ((strict & COMPARE_BASE) && DERIVED_FROM_P (t1, t2))
- return true;
+ break;
else if ((strict & COMPARE_DERIVED) && DERIVED_FROM_P (t2, t1))
- return true;
-
- /* We may be dealing with Objective-C instances... */
- if (TREE_CODE (t1) == RECORD_TYPE
- && (retval = objc_comptypes (t1, t2, 0) >= 0))
- return retval;
- /* ...but fall through if we are not. */
+ break;
return false;
if (!comptypes (TYPE_OFFSET_BASETYPE (t1), TYPE_OFFSET_BASETYPE (t2),
strict & ~COMPARE_REDECLARATION))
return false;
- /* Fall through. */
+ if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)))
+ return false;
+ break;
case POINTER_TYPE:
case REFERENCE_TYPE:
- return same_type_p (TREE_TYPE (t1), TREE_TYPE (t2));
+ if (TYPE_MODE (t1) != TYPE_MODE (t2)
+ || TYPE_REF_CAN_ALIAS_ALL (t1) != TYPE_REF_CAN_ALIAS_ALL (t2)
+ || !same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)))
+ return false;
+ break;
case METHOD_TYPE:
case FUNCTION_TYPE:
if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)))
return false;
- return compparms (TYPE_ARG_TYPES (t1), TYPE_ARG_TYPES (t2));
+ if (!compparms (TYPE_ARG_TYPES (t1), TYPE_ARG_TYPES (t2)))
+ return false;
+ break;
case ARRAY_TYPE:
/* Target types must match incl. qualifiers. */
- return comp_array_types (t1, t2, !!(strict & COMPARE_REDECLARATION));
+ if (!comp_array_types (t1, t2, !!(strict & COMPARE_REDECLARATION)))
+ return false;
+ break;
case TEMPLATE_TYPE_PARM:
- return (TEMPLATE_TYPE_IDX (t1) == TEMPLATE_TYPE_IDX (t2)
- && TEMPLATE_TYPE_LEVEL (t1) == TEMPLATE_TYPE_LEVEL (t2));
+ if (TEMPLATE_TYPE_IDX (t1) != TEMPLATE_TYPE_IDX (t2)
+ || TEMPLATE_TYPE_LEVEL (t1) != TEMPLATE_TYPE_LEVEL (t2))
+ return false;
+ break;
case TYPENAME_TYPE:
if (!cp_tree_equal (TYPENAME_TYPE_FULLNAME (t1),
TYPENAME_TYPE_FULLNAME (t2)))
- return false;
- return same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2));
+ return false;
+ if (!same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2)))
+ return false;
+ break;
case UNBOUND_CLASS_TEMPLATE:
if (!cp_tree_equal (TYPE_IDENTIFIER (t1), TYPE_IDENTIFIER (t2)))
- return false;
- return same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2));
+ return false;
+ if (!same_type_p (TYPE_CONTEXT (t1), TYPE_CONTEXT (t2)))
+ return false;
+ break;
case COMPLEX_TYPE:
- return same_type_p (TREE_TYPE (t1), TREE_TYPE (t2));
+ if (!same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)))
+ return false;
+ break;
case VECTOR_TYPE:
- return TYPE_VECTOR_SUBPARTS (t1) == TYPE_VECTOR_SUBPARTS (t2)
- && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2));
+ if (TYPE_VECTOR_SUBPARTS (t1) != TYPE_VECTOR_SUBPARTS (t2)
+ || !same_type_p (TREE_TYPE (t1), TREE_TYPE (t2)))
+ return false;
break;
default:
- break;
+ return false;
}
- return false;
+
+ /* If we get here, we know that from a target independent POV the
+ types are the same. Make sure the target attributes are also
+ the same. */
+ return targetm.comp_type_attributes (t1, t2);
}
/* Returns 1 if TYPE1 is at least as qualified as TYPE2. */
{
int q1 = cp_type_quals (type1);
int q2 = cp_type_quals (type2);
-
+
/* All qualifiers for TYPE2 must also appear in TYPE1. */
return (q1 & q2) == q2;
}
-/* Returns 1 if TYPE1 is more qualified than TYPE2. */
-
-bool
-more_qualified_p (tree type1, tree type2)
-{
- int q1 = cp_type_quals (type1);
- int q2 = cp_type_quals (type2);
-
- return q1 != q2 && (q1 & q2) == q2;
-}
-
/* Returns 1 if TYPE1 is more cv-qualified than TYPE2, -1 if TYPE2 is
more cv-qualified that TYPE1, and 0 otherwise. */
{
tree basetype = BINFO_TYPE (BINFO_BASE_BINFO (TYPE_BINFO (tt1), i));
tree trial = common_base_type (basetype, tt2);
-
+
if (trial)
{
if (trial == error_mark_node)
{
tree basetype = BINFO_TYPE (BINFO_BASE_BINFO (TYPE_BINFO (tt2), i));
tree trial = common_base_type (tt1, basetype);
-
+
if (trial)
{
if (trial == error_mark_node)
gcc_assert (op == SIZEOF_EXPR || op == ALIGNOF_EXPR);
if (type == error_mark_node)
return error_mark_node;
-
- if (processing_template_decl)
+
+ if (dependent_type_p (type))
{
value = build_min (op, size_type_node, type);
TREE_READONLY (value) = 1;
return value;
}
-
+
op_name = operator_name_info[(int) op].name;
type = non_reference (type);
if (type_code == METHOD_TYPE)
{
if (complain && (pedantic || warn_pointer_arith))
- pedwarn ("invalid application of `%s' to a member function", op_name);
+ pedwarn ("invalid application of %qs to a member function", op_name);
value = size_one_node;
}
else
- value = c_sizeof_or_alignof_type (complete_type (type), op, complain);
+ value = c_sizeof_or_alignof_type (complete_type (type),
+ op == SIZEOF_EXPR,
+ complain);
return value;
}
cxx_sizeof_or_alignof_expr (tree e, enum tree_code op)
{
const char *op_name = operator_name_info[(int) op].name;
-
+
if (e == error_mark_node)
return error_mark_node;
-
+
if (processing_template_decl)
{
e = build_min (op, size_type_node, e);
TREE_SIDE_EFFECTS (e) = 0;
TREE_READONLY (e) = 1;
-
+
return e;
}
-
+
if (TREE_CODE (e) == COMPONENT_REF
&& TREE_CODE (TREE_OPERAND (e, 1)) == FIELD_DECL
&& DECL_C_BIT_FIELD (TREE_OPERAND (e, 1)))
{
- error ("invalid application of `%s' to a bit-field", op_name);
+ error ("invalid application of %qs to a bit-field", op_name);
e = char_type_node;
}
else if (is_overloaded_fn (e))
{
- pedwarn ("ISO C++ forbids applying `%s' to an expression of function type", op_name);
+ pedwarn ("ISO C++ forbids applying %qs to an expression of "
+ "function type", op_name);
e = char_type_node;
}
else if (type_unknown_p (e))
}
else
e = TREE_TYPE (e);
-
+
return cxx_sizeof_or_alignof_type (e, op, true);
}
-
+
\f
/* EXPR is being used in a context that is not a function call.
Enforce:
- [expr.ref]
+ [expr.ref]
The expression can be used only as the left-hand operand of a
- member function call.
+ member function call.
[expr.mptr.operator]
If the result of .* or ->* is a function, then that result can be
- used only as the operand for the function call operator ().
+ used only as the operand for the function call operator ().
by issuing an error message if appropriate. Returns true iff EXPR
violates these rules. */
type = TREE_TYPE (exp);
code = TREE_CODE (type);
- if (code == REFERENCE_TYPE)
- {
- exp = convert_from_reference (exp);
- type = TREE_TYPE (exp);
- code = TREE_CODE (type);
- }
-
if (type == error_mark_node)
return error_mark_node;
cxx_incomplete_type_error (exp, TREE_TYPE (exp));
return error_mark_node;
}
-
- /* Constants can be used directly unless they're not loadable. */
- if (TREE_CODE (exp) == CONST_DECL)
- exp = DECL_INITIAL (exp);
- /* Replace a nonvolatile const static variable with its value. We
- don't do this for arrays, though; we want the address of the
- first element of the array, not the address of the first element
- of its initializing constant. */
- else if (code != ARRAY_TYPE)
- {
- exp = decl_constant_value (exp);
- type = TREE_TYPE (exp);
- }
+
+ exp = integral_constant_value (exp);
/* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
Leave such NOP_EXPRs, since RHS is being used in non-lvalue context. */
tree ptrtype;
if (TREE_CODE (exp) == INDIRECT_REF)
- return build_nop (build_pointer_type (TREE_TYPE (type)),
+ return build_nop (build_pointer_type (TREE_TYPE (type)),
TREE_OPERAND (exp, 0));
if (TREE_CODE (exp) == COMPOUND_EXPR)
/* This warning is not very useful, as it complains about printf. */
if (warn && warn_write_strings)
- warning ("deprecated conversion from string constant to `%T'", totype);
+ warning (0, "deprecated conversion from string constant to %qT'", totype);
return 1;
}
non-NULL, it indicates the path to the base used to name MEMBER.
If PRESERVE_REFERENCE is true, the expression returned will have
REFERENCE_TYPE if the MEMBER does. Otherwise, the expression
- returned will have the type referred to by the reference.
+ returned will have the type referred to by the reference.
This function does not perform access control; that is either done
earlier by the parser when the name of MEMBER is resolved to MEMBER
functions indicated by MEMBER. */
tree
-build_class_member_access_expr (tree object, tree member,
+build_class_member_access_expr (tree object, tree member,
tree access_path, bool preserve_reference)
{
tree object_type;
if (object == error_mark_node || member == error_mark_node)
return error_mark_node;
- if (TREE_CODE (member) == PSEUDO_DTOR_EXPR)
- return member;
-
gcc_assert (DECL_P (member) || BASELINK_P (member));
/* [expr.ref]
The type of the first expression shall be "class object" (of a
complete type). */
object_type = TREE_TYPE (object);
- if (!currently_open_class (object_type)
+ if (!currently_open_class (object_type)
&& !complete_type_or_else (object_type, object))
return error_mark_node;
if (!CLASS_TYPE_P (object_type))
{
- error ("request for member `%D' in `%E', which is of non-class type `%T'",
+ error ("request for member %qD in %qE, which is of non-class type %qT",
member, object, object_type);
return error_mark_node;
}
if (!member_scope || !DERIVED_FROM_P (member_scope, object_type))
{
if (TREE_CODE (member) == FIELD_DECL)
- error ("invalid use of nonstatic data member '%E'", member);
+ error ("invalid use of nonstatic data member %qE", member);
else
- error ("`%D' is not a member of `%T'", member, object_type);
+ error ("%qD is not a member of %qT", member, object_type);
return error_mark_node;
}
base_kind kind;
binfo = lookup_base (access_path ? access_path : object_type,
- member_scope, ba_ignore, &kind);
+ member_scope, ba_unique, &kind);
if (binfo == error_mark_node)
return error_mark_node;
offsetof macro. */
if (null_object_p && kind == bk_via_virtual)
{
- error ("invalid access to non-static data member `%D' of NULL object",
+ error ("invalid access to non-static data member %qD of "
+ "NULL object",
member);
- error ("(perhaps the `offsetof' macro was used incorrectly)");
+ error ("(perhaps the %<offsetof%> macro was used incorrectly)");
return error_mark_node;
}
/* Convert to the base. */
- object = build_base_path (PLUS_EXPR, object, binfo,
+ object = build_base_path (PLUS_EXPR, object, binfo,
/*nonnull=*/1);
/* If we found the base successfully then we should be able
to convert to it successfully. */
&& !DECL_FIELD_IS_BASE (member)
&& !skip_evaluation)
{
- warning ("invalid access to non-static data member `%D' of NULL object",
+ warning (0, "invalid access to non-static data member %qD of NULL object",
member);
- warning ("(perhaps the `offsetof' macro was used incorrectly)");
+ warning (0, "(perhaps the %<offsetof%> macro was used incorrectly)");
}
/* If MEMBER is from an anonymous aggregate, we have converted
constructed, and was then disassembled before calling
build_field_call. After the function-call code is
cleaned up, this waste can be eliminated. */
- && (!same_type_ignoring_top_level_qualifiers_p
+ && (!same_type_ignoring_top_level_qualifiers_p
(TREE_TYPE (object), DECL_CONTEXT (member))))
{
tree anonymous_union;
member_type = TREE_TYPE (member);
if (TREE_CODE (member_type) != REFERENCE_TYPE)
{
- type_quals = (cp_type_quals (member_type)
+ type_quals = (cp_type_quals (member_type)
| cp_type_quals (object_type));
-
+
/* A field is const (volatile) if the enclosing object, or the
field itself, is const (volatile). But, a mutable field is
not const, even within a const object. */
expression itself. */
if (type_quals & TYPE_QUAL_CONST)
TREE_READONLY (result) = 1;
- else if (type_quals & TYPE_QUAL_VOLATILE)
+ if (type_quals & TYPE_QUAL_VOLATILE)
TREE_THIS_VOLATILE (result) = 1;
}
else if (BASELINK_P (member))
}
else
{
- error ("invalid use of `%D'", member);
+ error ("invalid use of %qD", member);
return error_mark_node;
}
if (!preserve_reference)
/* [expr.ref]
-
+
If E2 is declared to have type "reference to T", then ... the
type of E1.E2 is T. */
result = convert_from_reference (result);
if (scope && !check_dtor_name (scope, dtor_name))
{
- error ("qualified type `%T' does not match destructor name `~%T'",
+ error ("qualified type %qT does not match destructor name ~%qT",
scope, dtor_type);
return error_mark_node;
}
if (!DERIVED_FROM_P (dtor_type, TYPE_MAIN_VARIANT (object_type)))
{
- error ("the type being destroyed is `%T', but the destructor refers to `%T'",
+ error ("the type being destroyed is %qT, but the destructor refers to %qT",
TYPE_MAIN_VARIANT (object_type), dtor_type);
return error_mark_node;
}
- if (!TYPE_HAS_DESTRUCTOR (dtor_type))
- return build3 (PSEUDO_DTOR_EXPR, void_type_node, object, scope,
- dtor_type);
expr = lookup_member (dtor_type, complete_dtor_identifier,
/*protect=*/1, /*want_type=*/false);
expr = (adjust_result_of_qualified_name_lookup
if (object == error_mark_node || name == error_mark_node)
return error_mark_node;
+ /* If OBJECT is an ObjC class instance, we must obey ObjC access rules. */
+ if (!objc_is_public (object, name))
+ return error_mark_node;
+
object_type = TREE_TYPE (object);
if (processing_template_decl)
return build_min_nt (COMPONENT_REF, object, name, NULL_TREE);
object = build_non_dependent_expr (object);
}
-
- if (TREE_CODE (object_type) == REFERENCE_TYPE)
- {
- object = convert_from_reference (object);
- object_type = TREE_TYPE (object);
- }
/* [expr.ref]
The type of the first expression shall be "class object" (of a
complete type). */
- if (!currently_open_class (object_type)
+ if (!currently_open_class (object_type)
&& !complete_type_or_else (object_type, object))
return error_mark_node;
if (!CLASS_TYPE_P (object_type))
{
- error ("request for member `%D' in `%E', which is of non-class type `%T'",
+ error ("request for member %qD in %qE, which is of non-class type %qT",
name, object, object_type);
return error_mark_node;
}
name a member of OBJECT_TYPE. */
if (TREE_CODE (scope) == NAMESPACE_DECL)
{
- error ("`%D::%D' is not a member of `%T'",
+ error ("%<%D::%D%> is not a member of %qT",
scope, name, object_type);
return error_mark_node;
}
return error_mark_node;
if (!access_path)
{
- error ("`%T' is not a base of `%T'", scope, object_type);
+ error ("%qT is not a base of %qT", scope, object_type);
return error_mark_node;
}
}
else
{
/* Look up the member. */
- member = lookup_member (access_path, name, /*protect=*/1,
+ member = lookup_member (access_path, name, /*protect=*/1,
/*want_type=*/false);
if (member == NULL_TREE)
{
- error ("'%D' has no member named '%E'", object_type, name);
+ error ("%qD has no member named %qE", object_type, name);
return error_mark_node;
}
if (member == error_mark_node)
return error_mark_node;
}
-
+
if (is_template_id)
{
tree template = member;
-
+
if (BASELINK_P (template))
template = lookup_template_function (template, template_args);
else
{
- error ("`%D' is not a member template function", name);
+ error ("%qD is not a member template function", name);
return error_mark_node;
}
}
/*want_type=*/false);
member_type = cp_build_qualified_type (TREE_TYPE (member),
cp_type_quals (ptrmem_type));
- return fold (build3 (COMPONENT_REF, member_type,
- ptrmem, member, NULL_TREE));
+ return fold_build3 (COMPONENT_REF, member_type,
+ ptrmem, member, NULL_TREE);
}
/* Given an expression PTR for a pointer, return an expression
? ptr : decay_conversion (ptr));
type = TREE_TYPE (pointer);
- if (TYPE_PTR_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
+ if (POINTER_TYPE_P (type))
{
/* [expr.unary.op]
-
+
If the type of the expression is "pointer to T," the type
- of the result is "T."
+ of the result is "T."
- We must use the canonical variant because certain parts of
+ We must use the canonical variant because certain parts of
the back end, like fold, do pointer comparisons between
types. */
tree t = canonical_type_variant (TREE_TYPE (type));
if (VOID_TYPE_P (t))
- {
- /* A pointer to incomplete type (other than cv void) can be
- dereferenced [expr.unary.op]/1 */
- error ("`%T' is not a pointer-to-object type", type);
- return error_mark_node;
- }
+ {
+ /* A pointer to incomplete type (other than cv void) can be
+ dereferenced [expr.unary.op]/1 */
+ error ("%qT is not a pointer-to-object type", type);
+ return error_mark_node;
+ }
else if (TREE_CODE (pointer) == ADDR_EXPR
&& same_type_p (t, TREE_TYPE (TREE_OPERAND (pointer, 0))))
/* The POINTER was something like `&x'. We simplify `*&x' to
/* `pointer' won't be an error_mark_node if we were given a
pointer to member, so it's cool to check for this here. */
else if (TYPE_PTR_TO_MEMBER_P (type))
- error ("invalid use of `%s' on pointer to member", errorstring);
+ error ("invalid use of %qs on pointer to member", errorstring);
else if (pointer != error_mark_node)
{
if (errorstring)
- error ("invalid type argument of `%s'", errorstring);
+ error ("invalid type argument of %qs", errorstring);
else
error ("invalid type argument");
}
must have done so deliberately. */
if (warn_char_subscripts
&& TYPE_MAIN_VARIANT (TREE_TYPE (idx)) == char_type_node)
- warning ("array subscript has type `char'");
+ warning (0, "array subscript has type %<char%>");
if (!INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (idx)))
{
/* Apply integral promotions *after* noticing character types.
(It is unclear why we do these promotions -- the standard
- does not say that we should. In fact, the natual thing would
+ does not say that we should. In fact, the natural thing would
seem to be to convert IDX to ptrdiff_t; we're performing
pointer arithmetic.) */
idx = perform_integral_promotions (idx);
while (TREE_CODE (foo) == COMPONENT_REF)
foo = TREE_OPERAND (foo, 0);
if (TREE_CODE (foo) == VAR_DECL && DECL_REGISTER (foo))
- warning ("subscripting array declared `register'");
+ warning (0, "subscripting array declared %<register%>");
}
type = TREE_TYPE (TREE_TYPE (array));
}
else
{
- error ("object missing in use of `%E'", function);
+ error ("object missing in use of %qE", function);
return error_mark_node;
}
}
function = save_expr (function);
/* Start by extracting all the information from the PMF itself. */
- e3 = PFN_FROM_PTRMEMFUNC (function);
+ e3 = pfn_from_ptrmemfunc (function);
delta = build_ptrmemfunc_access_expr (function, delta_identifier);
idx = build1 (NOP_EXPR, vtable_index_type, e3);
switch (TARGET_PTRMEMFUNC_VBIT_LOCATION)
gcc_unreachable ();
}
- /* Convert down to the right base before using the instance. First
- use the type... */
+ /* Convert down to the right base before using the instance. A
+ special case is that in a pointer to member of class C, C may
+ be incomplete. In that case, the function will of course be
+ a member of C, and no conversion is required. In fact,
+ lookup_base will fail in that case, because incomplete
+ classes do not have BINFOs. */
basetype = TYPE_METHOD_BASETYPE (TREE_TYPE (fntype));
- basetype = lookup_base (TREE_TYPE (TREE_TYPE (instance_ptr)),
- basetype, ba_check, NULL);
- instance_ptr = build_base_path (PLUS_EXPR, instance_ptr, basetype, 1);
- if (instance_ptr == error_mark_node)
- return error_mark_node;
+ if (!same_type_ignoring_top_level_qualifiers_p
+ (basetype, TREE_TYPE (TREE_TYPE (instance_ptr))))
+ {
+ basetype = lookup_base (TREE_TYPE (TREE_TYPE (instance_ptr)),
+ basetype, ba_check, NULL);
+ instance_ptr = build_base_path (PLUS_EXPR, instance_ptr, basetype,
+ 1);
+ if (instance_ptr == error_mark_node)
+ return error_mark_node;
+ }
/* ...and then the delta in the PMF. */
instance_ptr = build2 (PLUS_EXPR, TREE_TYPE (instance_ptr),
instance_ptr, delta);
vtbl = build_indirect_ref (vtbl, NULL);
/* Finally, extract the function pointer from the vtable. */
- e2 = fold (build2 (PLUS_EXPR, TREE_TYPE (vtbl), vtbl, idx));
+ e2 = fold_build2 (PLUS_EXPR, TREE_TYPE (vtbl), vtbl, idx);
e2 = build_indirect_ref (e2, NULL);
TREE_CONSTANT (e2) = 1;
TREE_INVARIANT (e2) = 1;
TREE_TYPE (e2) = TREE_TYPE (e3);
e1 = build_conditional_expr (e1, e2, e3);
-
+
/* Make sure this doesn't get evaluated first inside one of the
branches of the COND_EXPR. */
if (instance_save_expr)
int is_method;
tree original = function;
+ /* For Objective-C, convert any calls via a cast to OBJC_TYPE_REF
+ expressions, like those used for ObjC messenger dispatches. */
+ function = objc_rewrite_function_call (function, params);
+
/* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
Strip such NOP_EXPRs, since FUNCTION is used in non-lvalue context. */
if (TREE_CODE (function) == NOP_EXPR
/* Convert anything with function type to a pointer-to-function. */
if (pedantic && DECL_MAIN_P (function))
- pedwarn ("ISO C++ forbids calling `::main' from within program");
+ pedwarn ("ISO C++ forbids calling %<::main%> from within program");
/* Differs from default_conversion by not setting TREE_ADDRESSABLE
(because calling an inline function does not mean the function
needs to be separately compiled). */
-
+
if (DECL_INLINE (function))
function = inline_conversion (function);
else
if (TYPE_PTRMEMFUNC_P (fntype))
{
- error ("must use .* or ->* to call pointer-to-member function in `%E (...)'",
- original);
+ error ("must use %<.*%> or %<->*%> to call pointer-to-member "
+ "function in %<%E (...)%>",
+ original);
return error_mark_node;
}
|| is_method
|| TREE_CODE (function) == TEMPLATE_ID_EXPR))
{
- error ("`%E' cannot be used as a function", original);
+ error ("%qE cannot be used as a function", original);
return error_mark_node;
}
/* Check for errors in format strings and inappropriately
null parameters. */
- check_function_arguments (TYPE_ATTRIBUTES (fntype), coerced_params);
+ check_function_arguments (TYPE_ATTRIBUTES (fntype), coerced_params,
+ TYPE_ARG_TYPES (fntype));
return build_cxx_call (function, coerced_params);
}
NAME is an IDENTIFIER_NODE or 0. It is used only for error messages.
This is also where warnings about wrong number of args are generated.
-
+
Return a list of expressions for the parameters as converted.
Both VALUES and the returned value are chains of TREE_LIST nodes
In C++, unspecified trailing parameters can be filled in with their
default arguments, if such were specified. Do so here. */
-tree
+static tree
convert_arguments (tree typelist, tree values, tree fndecl, int flags)
{
tree typetail, valtail;
{
if (fndecl)
{
- cp_error_at ("too many arguments to %s `%+#D'", called_thing,
+ cp_error_at ("too many arguments to %s %q+#D", called_thing,
fndecl);
error ("at this point in file");
}
if (!COMPLETE_TYPE_P (complete_type (type)))
{
if (fndecl)
- error ("parameter %P of `%D' has incomplete type `%T'",
+ error ("parameter %P of %qD has incomplete type %qT",
i, fndecl, type);
else
- error ("parameter %P has incomplete type `%T'", i, type);
+ error ("parameter %P has incomplete type %qT", i, type);
parmval = error_mark_node;
}
else
}
else
{
- if (TREE_CODE (TREE_TYPE (val)) == REFERENCE_TYPE)
- val = convert_from_reference (val);
-
if (fndecl && DECL_BUILT_IN (fndecl)
&& DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CONSTANT_P)
/* Don't do ellipsis conversion for __built_in_constant_p
if (typetail != 0 && typetail != void_list_node)
{
/* See if there are default arguments that can be used. */
- if (TREE_PURPOSE (typetail)
+ if (TREE_PURPOSE (typetail)
&& TREE_CODE (TREE_PURPOSE (typetail)) != DEFAULT_ARG)
{
for (; typetail != void_list_node; ++i)
{
- tree parmval
- = convert_default_arg (TREE_VALUE (typetail),
- TREE_PURPOSE (typetail),
+ tree parmval
+ = convert_default_arg (TREE_VALUE (typetail),
+ TREE_PURPOSE (typetail),
fndecl, i);
if (parmval == error_mark_node)
{
if (fndecl)
{
- cp_error_at ("too few arguments to %s `%+#D'",
- called_thing, fndecl);
+ cp_error_at ("too few arguments to %s %q+#D",
+ called_thing, fndecl);
error ("at this point in file");
}
else
conversions on the operands. CODE is the kind of expression to build. */
tree
-build_x_binary_op (enum tree_code code, tree arg1, tree arg2,
+build_x_binary_op (enum tree_code code, tree arg1, tree arg2,
bool *overloaded_p)
{
tree orig_arg1;
if (code == DOTSTAR_EXPR)
expr = build_m_component_ref (arg1, arg2);
else
- expr = build_new_op (code, LOOKUP_NORMAL, arg1, arg2, NULL_TREE,
+ expr = build_new_op (code, LOOKUP_NORMAL, arg1, arg2, NULL_TREE,
overloaded_p);
if (processing_template_decl && expr != error_mark_node)
return build_min_non_dep (code, expr, orig_arg1, orig_arg2);
-
+
return expr;
}
tree op0, op1;
enum tree_code code0, code1;
tree type0, type1;
+ const char *invalid_op_diag;
/* Expression code to give to the expression when it is built.
Normally this is CODE, which is what the caller asked for,
/* Apply default conversions. */
op0 = orig_op0;
op1 = orig_op1;
-
+
if (code == TRUTH_AND_EXPR || code == TRUTH_ANDIF_EXPR
|| code == TRUTH_OR_EXPR || code == TRUTH_ORIF_EXPR
|| code == TRUTH_XOR_EXPR)
tree t = instantiate_type (TREE_TYPE (op1), op0, tf_none);
if (t != error_mark_node)
{
- pedwarn ("assuming cast to type `%T' from overloaded function",
- TREE_TYPE (t));
+ pedwarn ("assuming cast to type %qT from overloaded function",
+ TREE_TYPE (t));
op0 = t;
}
}
tree t = instantiate_type (TREE_TYPE (op0), op1, tf_none);
if (t != error_mark_node)
{
- pedwarn ("assuming cast to type `%T' from overloaded function",
- TREE_TYPE (t));
+ pedwarn ("assuming cast to type %qT from overloaded function",
+ TREE_TYPE (t));
op1 = t;
}
}
if (code0 == ERROR_MARK || code1 == ERROR_MARK)
return error_mark_node;
+ if ((invalid_op_diag
+ = targetm.invalid_binary_op (code, type0, type1)))
+ {
+ error (invalid_op_diag);
+ return error_mark_node;
+ }
+
switch (code)
{
case PLUS_EXPR:
|| code1 == COMPLEX_TYPE || code1 == VECTOR_TYPE))
{
if (TREE_CODE (op1) == INTEGER_CST && integer_zerop (op1))
- warning ("division by zero in `%E / 0'", op0);
+ warning (0, "division by zero in %<%E / 0%>", op0);
else if (TREE_CODE (op1) == REAL_CST && real_zerop (op1))
- warning ("division by zero in `%E / 0.'", op0);
-
+ warning (0, "division by zero in %<%E / 0.%>", op0);
+
if (code0 == COMPLEX_TYPE || code0 == VECTOR_TYPE)
code0 = TREE_CODE (TREE_TYPE (TREE_TYPE (op0)));
if (code1 == COMPLEX_TYPE || code1 == VECTOR_TYPE)
case BIT_AND_EXPR:
case BIT_IOR_EXPR:
case BIT_XOR_EXPR:
- if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE)
+ if ((code0 == INTEGER_TYPE && code1 == INTEGER_TYPE)
+ || (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE))
shorten = -1;
break;
case TRUNC_MOD_EXPR:
case FLOOR_MOD_EXPR:
if (code1 == INTEGER_TYPE && integer_zerop (op1))
- warning ("division by zero in `%E %% 0'", op0);
+ warning (0, "division by zero in %<%E %% 0%>", op0);
else if (code1 == REAL_TYPE && real_zerop (op1))
- warning ("division by zero in `%E %% 0.'", op0);
-
+ warning (0, "division by zero in %<%E %% 0.%>", op0);
+
if (code0 == INTEGER_TYPE && code1 == INTEGER_TYPE)
{
/* Although it would be tempting to shorten always here, that loses
if (TREE_CODE (op1) == INTEGER_CST)
{
if (tree_int_cst_lt (op1, integer_zero_node))
- warning ("right shift count is negative");
+ warning (0, "right shift count is negative");
else
{
if (! integer_zerop (op1))
short_shift = 1;
if (compare_tree_int (op1, TYPE_PRECISION (type0)) >= 0)
- warning ("right shift count >= width of type");
+ warning (0, "right shift count >= width of type");
}
}
/* Convert the shift-count to an integer, regardless of
if (TREE_CODE (op1) == INTEGER_CST)
{
if (tree_int_cst_lt (op1, integer_zero_node))
- warning ("left shift count is negative");
+ warning (0, "left shift count is negative");
else if (compare_tree_int (op1, TYPE_PRECISION (type0)) >= 0)
- warning ("left shift count >= width of type");
+ warning (0, "left shift count >= width of type");
}
/* Convert the shift-count to an integer, regardless of
size of value being shifted. */
if (TREE_CODE (op1) == INTEGER_CST)
{
if (tree_int_cst_lt (op1, integer_zero_node))
- warning ("%s rotate count is negative",
+ warning (0, "%s rotate count is negative",
(code == LROTATE_EXPR) ? "left" : "right");
else if (compare_tree_int (op1, TYPE_PRECISION (type0)) >= 0)
- warning ("%s rotate count >= width of type",
+ warning (0, "%s rotate count >= width of type",
(code == LROTATE_EXPR) ? "left" : "right");
}
/* Convert the shift-count to an integer, regardless of
case EQ_EXPR:
case NE_EXPR:
if (warn_float_equal && (code0 == REAL_TYPE || code1 == REAL_TYPE))
- warning ("comparing floating point with == or != is unsafe");
+ warning (0, "comparing floating point with == or != is unsafe");
- build_type = boolean_type_node;
+ build_type = boolean_type_node;
if ((code0 == INTEGER_TYPE || code0 == REAL_TYPE
|| code0 == COMPLEX_TYPE)
&& (code1 == INTEGER_TYPE || code1 == REAL_TYPE
/* We generate:
- (op0.pfn == op1.pfn
+ (op0.pfn == op1.pfn
&& (!op0.pfn || op0.delta == op1.delta))
-
+
The reason for the `!op0.pfn' bit is that a NULL
pointer-to-member is any member with a zero PFN; the
DELTA field is unspecified. */
delta1 = build_ptrmemfunc_access_expr (op1,
delta_identifier);
e1 = cp_build_binary_op (EQ_EXPR, delta0, delta1);
- e2 = cp_build_binary_op (EQ_EXPR,
+ e2 = cp_build_binary_op (EQ_EXPR,
pfn0,
cp_convert (TREE_TYPE (pfn0),
integer_zero_node));
|| !same_type_p (TYPE_PTRMEMFUNC_FN_TYPE (type1),
type0));
}
-
+
break;
case MAX_EXPR:
break;
}
- arithmetic_types_p =
- ((code0 == INTEGER_TYPE || code0 == REAL_TYPE || code0 == COMPLEX_TYPE)
- && (code1 == INTEGER_TYPE || code1 == REAL_TYPE
- || code1 == COMPLEX_TYPE));
+ if (((code0 == INTEGER_TYPE || code0 == REAL_TYPE || code0 == COMPLEX_TYPE)
+ && (code1 == INTEGER_TYPE || code1 == REAL_TYPE
+ || code1 == COMPLEX_TYPE)))
+ arithmetic_types_p = 1;
+ else
+ {
+ arithmetic_types_p = 0;
+ /* Vector arithmetic is only allowed when both sides are vectors. */
+ if (code0 == VECTOR_TYPE && code1 == VECTOR_TYPE)
+ {
+ if (!tree_int_cst_equal (TYPE_SIZE (type0), TYPE_SIZE (type1))
+ || !same_scalar_type_ignoring_signedness (TREE_TYPE (type0),
+ TREE_TYPE (type1)))
+ {
+ binary_op_error (code);
+ return error_mark_node;
+ }
+ arithmetic_types_p = 1;
+ }
+ }
/* Determine the RESULT_TYPE, if it is not already known. */
if (!result_type
- && arithmetic_types_p
+ && arithmetic_types_p
&& (shorten || common || short_compare))
result_type = common_type (type0, type1);
if (!result_type)
{
- error ("invalid operands of types `%T' and `%T' to binary `%O'",
+ error ("invalid operands of types %qT and %qT to binary %qO",
TREE_TYPE (orig_op0), TREE_TYPE (orig_op1), code);
return error_mark_node;
}
/* If we're in a template, the only thing we need to know is the
RESULT_TYPE. */
if (processing_template_decl)
- return build2 (resultcode, result_type, op0, op1);
+ return build2 (resultcode,
+ build_type ? build_type : result_type,
+ op0, op1);
if (arithmetic_types_p)
{
pass the copies by reference, then copy them back afterward. */
tree xop0 = op0, xop1 = op1, xresult_type = result_type;
enum tree_code xresultcode = resultcode;
- tree val
+ tree val
= shorten_compare (&xop0, &xop1, &xresult_type, &xresultcode);
if (val != 0)
return cp_convert (boolean_type_node, val);
tree primop1 = get_narrower (op1, &unsignedp1);
/* Check for comparison of different enum types. */
- if (TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE
- && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE
+ if (TREE_CODE (TREE_TYPE (orig_op0)) == ENUMERAL_TYPE
+ && TREE_CODE (TREE_TYPE (orig_op1)) == ENUMERAL_TYPE
&& TYPE_MAIN_VARIANT (TREE_TYPE (orig_op0))
- != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1)))
+ != TYPE_MAIN_VARIANT (TREE_TYPE (orig_op1)))
{
- warning ("comparison between types `%#T' and `%#T'",
- TREE_TYPE (orig_op0), TREE_TYPE (orig_op1));
+ warning (0, "comparison between types %q#T and %q#T",
+ TREE_TYPE (orig_op0), TREE_TYPE (orig_op1));
}
/* Give warnings for comparisons between signed and unsigned
(result_type)))))
/* OK */;
else
- warning ("comparison between signed and unsigned integer expressions");
+ warning (0, "comparison between signed and unsigned integer expressions");
/* Warn if two unsigned values are being compared in a size
larger than their original size, and one (and only one) is the
primop0 = get_narrower (TREE_OPERAND (op0, 0), &unsignedp0);
if (TREE_CODE (primop1) == BIT_NOT_EXPR)
primop1 = get_narrower (TREE_OPERAND (op1, 0), &unsignedp1);
-
+
if (host_integerp (primop0, 0) || host_integerp (primop1, 0))
{
tree primop;
{
mask = (~ (HOST_WIDE_INT) 0) << bits;
if ((mask & constant) != mask)
- warning ("comparison of promoted ~unsigned with constant");
+ warning (0, "comparison of promoted ~unsigned with constant");
}
}
else if (unsignedp0 && unsignedp1
< TYPE_PRECISION (result_type))
&& (TYPE_PRECISION (TREE_TYPE (primop1))
< TYPE_PRECISION (result_type)))
- warning ("comparison of promoted ~unsigned with unsigned");
+ warning (0, "comparison of promoted ~unsigned with unsigned");
}
}
}
|| (orig_op1 == null_node
&& TREE_CODE (TREE_TYPE (op0)) != POINTER_TYPE)
/* Or, both are NULL and the operation was not a comparison. */
- || (orig_op0 == null_node && orig_op1 == null_node
+ || (orig_op0 == null_node && orig_op1 == null_node
&& code != EQ_EXPR && code != NE_EXPR)))
/* Some sort of arithmetic operation involving NULL was
performed. Note that pointer-difference and pointer-addition
have already been handled above, and so we don't end up here in
that case. */
- warning ("NULL used in arithmetic");
+ warning (0, "NULL used in arithmetic");
if (! converted)
{
if (TREE_TYPE (op0) != result_type)
- op0 = cp_convert (result_type, op0);
+ op0 = cp_convert (result_type, op0);
if (TREE_TYPE (op1) != result_type)
- op1 = cp_convert (result_type, op1);
+ op1 = cp_convert (result_type, op1);
if (op0 == error_mark_node || op1 == error_mark_node)
return error_mark_node;
if (pedantic || warn_pointer_arith)
{
if (TREE_CODE (target_type) == VOID_TYPE)
- pedwarn ("ISO C++ forbids using pointer of type `void *' in subtraction");
+ pedwarn ("ISO C++ forbids using pointer of type %<void *%> in subtraction");
if (TREE_CODE (target_type) == FUNCTION_TYPE)
pedwarn ("ISO C++ forbids using pointer to a function in subtraction");
if (TREE_CODE (target_type) == METHOD_TYPE)
/* First do the subtraction as integers;
then drop through to build the divide operator. */
- op0 = cp_build_binary_op (MINUS_EXPR,
+ op0 = cp_build_binary_op (MINUS_EXPR,
cp_convert (restype, op0),
cp_convert (restype, op1));
if (!COMPLETE_TYPE_P (TREE_TYPE (TREE_TYPE (op1))))
error ("invalid use of a pointer to an incomplete type in pointer arithmetic");
- op1 = (TYPE_PTROB_P (ptrtype)
+ op1 = (TYPE_PTROB_P (ptrtype)
? size_in_bytes (target_type)
: integer_one_node);
tree orig_expr = xarg;
tree exp;
int ptrmem = 0;
-
+
if (processing_template_decl)
{
if (type_dependent_expression_p (xarg))
return build_min_nt (code, xarg, NULL_TREE);
- /* For non-dependent pointer-to-member, the SCOPE_REF will be
- processed during template substitution. Just compute the
- right type here and build an ADDR_EXPR around it for
- diagnostics. */
- if (code == ADDR_EXPR && TREE_CODE (xarg) == SCOPE_REF)
- {
- tree type;
- if (TREE_TYPE (xarg) == unknown_type_node)
- type = unknown_type_node;
- else if (TREE_CODE (TREE_TYPE (xarg)) == FUNCTION_TYPE)
- type = build_pointer_type (TREE_TYPE (xarg));
- else
- type = build_ptrmem_type (TREE_OPERAND (xarg, 0),
- TREE_TYPE (xarg));
- return build_min (code, type, xarg, NULL_TREE);
- }
-
xarg = build_non_dependent_expr (xarg);
}
{
if (TREE_CODE (xarg) != OFFSET_REF)
{
- error ("invalid use of '%E' to form a pointer-to-member-function. Use a qualified-id.",
+ error ("invalid use of %qE to form a pointer-to-member-function."
+ " Use a qualified-id.",
xarg);
return error_mark_node;
}
else
{
- error ("parenthesis around '%E' cannot be used to form a pointer-to-member-function",
+ error ("parenthesis around %qE cannot be used to form a"
+ " pointer-to-member-function",
xarg);
PTRMEM_OK_P (xarg) = 1;
}
}
-
+
if (TREE_CODE (xarg) == OFFSET_REF)
- {
- ptrmem = PTRMEM_OK_P (xarg);
-
- if (!ptrmem && !flag_ms_extensions
- && TREE_CODE (TREE_TYPE (TREE_OPERAND (xarg, 1))) == METHOD_TYPE)
+ {
+ ptrmem = PTRMEM_OK_P (xarg);
+
+ if (!ptrmem && !flag_ms_extensions
+ && TREE_CODE (TREE_TYPE (TREE_OPERAND (xarg, 1))) == METHOD_TYPE)
{
/* A single non-static member, make sure we don't allow a
- pointer-to-member. */
+ pointer-to-member. */
xarg = build2 (OFFSET_REF, TREE_TYPE (xarg),
TREE_OPERAND (xarg, 0),
ovl_cons (TREE_OPERAND (xarg, 1), NULL_TREE));
PTRMEM_OK_P (xarg) = ptrmem;
- }
- }
+ }
+ }
else if (TREE_CODE (xarg) == TARGET_EXPR)
- warning ("taking address of temporary");
+ warning (0, "taking address of temporary");
exp = build_unary_op (ADDR_EXPR, xarg, 0);
- if (TREE_CODE (exp) == ADDR_EXPR)
- PTRMEM_OK_P (exp) = ptrmem;
}
if (processing_template_decl && exp != error_mark_node)
- return build_min_non_dep (code, exp, orig_expr,
- /*For {PRE,POST}{INC,DEC}REMENT_EXPR*/NULL_TREE);
+ exp = build_min_non_dep (code, exp, orig_expr,
+ /*For {PRE,POST}{INC,DEC}REMENT_EXPR*/NULL_TREE);
+ if (TREE_CODE (exp) == ADDR_EXPR)
+ PTRMEM_OK_P (exp) = ptrmem;
return exp;
}
}
/* Just like cp_truthvalue_conversion, but we want a CLEANUP_POINT_EXPR. */
-
+
tree
condition_conversion (tree expr)
{
if (processing_template_decl)
return expr;
t = perform_implicit_conversion (boolean_type_node, expr);
- t = build1 (CLEANUP_POINT_EXPR, boolean_type_node, t);
+ t = fold_build_cleanup_point_expr (boolean_type_node, t);
return t;
}
-
+
/* Return an ADDR_EXPR giving the address of T. This function
attempts no optimizations or simplifications; it is a low-level
primitive. */
tree argtype = 0;
const char *errstring = NULL;
tree val;
+ const char *invalid_op_diag;
if (arg == error_mark_node)
return error_mark_node;
- switch (code)
+ if ((invalid_op_diag
+ = targetm.invalid_unary_op ((code == UNARY_PLUS_EXPR
+ ? CONVERT_EXPR
+ : code),
+ TREE_TYPE (xarg))))
{
- case CONVERT_EXPR:
- /* This is used for unary plus, because a CONVERT_EXPR
- is enough to prevent anybody from looking inside for
- associativity, but won't generate any code. */
- if (!(arg = build_expr_type_conversion
- (WANT_ARITH | WANT_ENUM | WANT_POINTER, arg, true)))
- errstring = "wrong type argument to unary plus";
- else
- {
- if (!noconvert)
- arg = default_conversion (arg);
- arg = build1 (NON_LVALUE_EXPR, TREE_TYPE (arg), arg);
- }
- break;
+ error (invalid_op_diag);
+ return error_mark_node;
+ }
+ switch (code)
+ {
+ case UNARY_PLUS_EXPR:
case NEGATE_EXPR:
- if (!(arg = build_expr_type_conversion (WANT_ARITH | WANT_ENUM, arg, true)))
- errstring = "wrong type argument to unary minus";
- else if (!noconvert && CP_INTEGRAL_TYPE_P (TREE_TYPE (arg)))
- arg = perform_integral_promotions (arg);
+ {
+ int flags = WANT_ARITH | WANT_ENUM;
+ /* Unary plus (but not unary minus) is allowed on pointers. */
+ if (code == UNARY_PLUS_EXPR)
+ flags |= WANT_POINTER;
+ arg = build_expr_type_conversion (flags, arg, true);
+ if (!arg)
+ errstring = (code == NEGATE_EXPR
+ ? "wrong type argument to unary minus"
+ : "wrong type argument to unary plus");
+ else
+ {
+ if (!noconvert && CP_INTEGRAL_TYPE_P (TREE_TYPE (arg)))
+ arg = perform_integral_promotions (arg);
+
+ /* Make sure the result is not a lvalue: a unary plus or minus
+ expression is always a rvalue. */
+ if (real_lvalue_p (arg))
+ arg = build1 (NON_LVALUE_EXPR, TREE_TYPE (arg), arg);
+ }
+ }
break;
case BIT_NOT_EXPR:
case NOP_EXPR:
break;
-
+
case REALPART_EXPR:
if (TREE_CODE (arg) == COMPLEX_CST)
return TREE_REALPART (arg);
}
else
return cp_convert (TREE_TYPE (arg), integer_zero_node);
-
+
case PREINCREMENT_EXPR:
case POSTINCREMENT_EXPR:
case PREDECREMENT_EXPR:
pedwarn ("ISO C++ forbids %sing an enum",
(code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR)
? "increment" : "decrement");
-
+
/* Compute the increment. */
if (TREE_CODE (argtype) == POINTER_TYPE)
{
tree type = complete_type (TREE_TYPE (argtype));
-
+
if (!COMPLETE_OR_VOID_TYPE_P (type))
- error ("cannot %s a pointer to incomplete type `%T'",
- ((code == PREINCREMENT_EXPR
- || code == POSTINCREMENT_EXPR)
- ? "increment" : "decrement"), TREE_TYPE (argtype));
+ error ("cannot %s a pointer to incomplete type %qT",
+ ((code == PREINCREMENT_EXPR
+ || code == POSTINCREMENT_EXPR)
+ ? "increment" : "decrement"), TREE_TYPE (argtype));
else if ((pedantic || warn_pointer_arith)
&& !TYPE_PTROB_P (argtype))
- pedwarn ("ISO C++ forbids %sing a pointer of type `%T'",
- ((code == PREINCREMENT_EXPR
- || code == POSTINCREMENT_EXPR)
- ? "increment" : "decrement"), argtype);
+ pedwarn ("ISO C++ forbids %sing a pointer of type %qT",
+ ((code == PREINCREMENT_EXPR
+ || code == POSTINCREMENT_EXPR)
+ ? "increment" : "decrement"), argtype);
inc = cxx_sizeof_nowarn (TREE_TYPE (argtype));
}
else
/* Complain about anything else that is not a true lvalue. */
if (!lvalue_or_else (arg, ((code == PREINCREMENT_EXPR
|| code == POSTINCREMENT_EXPR)
- ? "increment" : "decrement")))
+ ? lv_increment : lv_decrement)))
return error_mark_node;
/* Forbid using -- on `bool'. */
{
if (code == POSTDECREMENT_EXPR || code == PREDECREMENT_EXPR)
{
- error ("invalid use of `--' on bool variable `%D'", arg);
+ error ("invalid use of %<--%> on bool variable %qD", arg);
return error_mark_node;
}
val = boolean_increment (code, arg);
}
else if (pedantic && DECL_MAIN_P (arg))
/* ARM $3.4 */
- pedwarn ("ISO C++ forbids taking address of function `::main'");
+ pedwarn ("ISO C++ forbids taking address of function %<::main%>");
/* Let &* cancel out to simplify resulting code. */
if (TREE_CODE (arg) == INDIRECT_REF)
if (TREE_CODE (arg) == COMPONENT_REF && type_unknown_p (arg)
&& !really_overloaded_fn (TREE_OPERAND (arg, 1)))
- {
+ {
/* They're trying to take the address of a unique non-static
member function. This is ill-formed (except in MS-land),
but let's try to DTRT.
/* An expression like &memfn. */
pedwarn ("ISO C++ forbids taking the address of an unqualified"
" or parenthesized non-static member function to form"
- " a pointer to member function. Say `&%T::%D'",
+ " a pointer to member function. Say %<&%T::%D%>",
base, name);
else
pedwarn ("ISO C++ forbids taking the address of a bound member"
" function to form a pointer to member function."
- " Say `&%T::%D'",
+ " Say %<&%T::%D%>",
base, name);
}
arg = build_offset_ref (base, name, /*address_p=*/true);
- }
+ }
- offset_ref:
+ offset_ref:
if (type_unknown_p (arg))
return build1 (ADDR_EXPR, unknown_type_node, arg);
-
+
/* Handle complex lvalues (when permitted)
by reduction to simpler cases. */
val = unary_complex_lvalue (code, arg);
arg = OVL_CURRENT (arg);
break;
+ case OFFSET_REF:
+ /* Turn a reference to a non-static data member into a
+ pointer-to-member. */
+ {
+ tree type;
+ tree t;
+
+ if (!PTRMEM_OK_P (arg))
+ return build_unary_op (code, arg, 0);
+
+ t = TREE_OPERAND (arg, 1);
+ if (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE)
+ {
+ error ("cannot create pointer to reference member %qD", t);
+ return error_mark_node;
+ }
+
+ type = build_ptrmem_type (context_for_name_lookup (t),
+ TREE_TYPE (t));
+ t = make_ptrmem_cst (type, TREE_OPERAND (arg, 1));
+ return t;
+ }
+
default:
break;
}
is an error. */
else if (TREE_CODE (argtype) != FUNCTION_TYPE
&& TREE_CODE (argtype) != METHOD_TYPE
- && !lvalue_or_else (arg, "unary `&'"))
+ && TREE_CODE (arg) != OFFSET_REF
+ && !lvalue_or_else (arg, lv_addressof))
return error_mark_node;
if (argtype != error_mark_node)
expression so we can just form an ADDR_EXPR with the
correct type. */
|| processing_template_decl)
- addr = build_address (arg);
+ {
+ addr = build_address (arg);
+ if (TREE_CODE (arg) == OFFSET_REF)
+ PTRMEM_OK_P (addr) = PTRMEM_OK_P (arg);
+ }
else if (TREE_CODE (TREE_OPERAND (arg, 1)) == BASELINK)
{
tree fn = BASELINK_FUNCTIONS (TREE_OPERAND (arg, 1));
}
else if (DECL_C_BIT_FIELD (TREE_OPERAND (arg, 1)))
{
- error ("attempt to take address of bit-field structure member `%D'",
+ error ("attempt to take address of bit-field structure member %qD",
TREE_OPERAND (arg, 1));
return error_mark_node;
}
else
{
+ tree object = TREE_OPERAND (arg, 0);
tree field = TREE_OPERAND (arg, 1);
- tree rval = build_unary_op (ADDR_EXPR, TREE_OPERAND (arg, 0), 0);
- tree binfo = lookup_base (TREE_TYPE (TREE_TYPE (rval)),
- decl_type_context (field),
- ba_check, NULL);
-
- rval = build_base_path (PLUS_EXPR, rval, binfo, 1);
-
- TREE_OPERAND (arg, 0) = build_indirect_ref (rval, NULL);
+ gcc_assert (same_type_ignoring_top_level_qualifiers_p
+ (TREE_TYPE (object), decl_type_context (field)));
addr = build_address (arg);
}
&& TREE_CODE (TREE_TYPE (argtype)) == METHOD_TYPE)
{
build_ptrmemfunc_type (argtype);
- addr = build_ptrmemfunc (argtype, addr, 0);
+ addr = build_ptrmemfunc (argtype, addr, 0,
+ /*c_cast_p=*/false);
}
return addr;
for certain kinds of expressions which are not really lvalues
but which we can accept as lvalues.
- If ARG is not a kind of expression we can handle, return zero. */
-
+ If ARG is not a kind of expression we can handle, return
+ NULL_TREE. */
+
tree
unary_complex_lvalue (enum tree_code code, tree arg)
{
+ /* Inside a template, making these kinds of adjustments is
+ pointless; we are only concerned with the type of the
+ expression. */
+ if (processing_template_decl)
+ return NULL_TREE;
+
/* Handle (a, b) used as an "lvalue". */
if (TREE_CODE (arg) == COMPOUND_EXPR)
{
if (TREE_CODE (TREE_TYPE (arg)) == FUNCTION_TYPE
|| TREE_CODE (TREE_TYPE (arg)) == METHOD_TYPE
|| TREE_CODE (arg) == OFFSET_REF)
- {
- tree t;
-
- gcc_assert (TREE_CODE (arg) != SCOPE_REF);
-
- if (TREE_CODE (arg) != OFFSET_REF)
- return 0;
-
- t = TREE_OPERAND (arg, 1);
-
- /* Check all this code for right semantics. */
- if (TREE_CODE (t) == FUNCTION_DECL)
- {
- if (DECL_DESTRUCTOR_P (t))
- error ("taking address of destructor");
- return build_unary_op (ADDR_EXPR, t, 0);
- }
- if (TREE_CODE (t) == VAR_DECL)
- return build_unary_op (ADDR_EXPR, t, 0);
- else
- {
- tree type;
-
- if (TREE_OPERAND (arg, 0)
- && ! is_dummy_object (TREE_OPERAND (arg, 0))
- && TREE_CODE (t) != FIELD_DECL)
- {
- error ("taking address of bound pointer-to-member expression");
- return error_mark_node;
- }
- if (!PTRMEM_OK_P (arg))
- return build_unary_op (code, arg, 0);
-
- if (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE)
- {
- error ("cannot create pointer to reference member `%D'", t);
- return error_mark_node;
- }
-
- type = build_ptrmem_type (context_for_name_lookup (t),
- TREE_TYPE (t));
- t = make_ptrmem_cst (type, TREE_OPERAND (arg, 1));
- return t;
- }
- }
+ return NULL_TREE;
-
/* We permit compiler to make function calls returning
objects of aggregate type look like lvalues. */
{
case PARM_DECL:
if (x == current_class_ptr)
{
- error ("cannot take the address of `this', which is an rvalue expression");
+ error ("cannot take the address of %<this%>, which is an rvalue expression");
TREE_ADDRESSABLE (x) = 1; /* so compiler doesn't die later. */
return true;
}
case CONST_DECL:
case RESULT_DECL:
if (DECL_REGISTER (x) && !TREE_ADDRESSABLE (x)
- && !DECL_ARTIFICIAL (x) && extra_warnings)
- warning ("address requested for `%D', which is declared `register'",
- x);
+ && !DECL_ARTIFICIAL (x))
+ {
+ if (DECL_HARD_REGISTER (x) != 0)
+ {
+ error
+ ("address of explicit register variable %qD requested", x);
+ return false;
+ }
+ else if (extra_warnings)
+ warning
+ (0, "address requested for %qD, which is declared %<register%>", x);
+ }
TREE_ADDRESSABLE (x) = 1;
return true;
expr = build_conditional_expr (ifexp, op1, op2);
if (processing_template_decl && expr != error_mark_node)
- return build_min_non_dep (COND_EXPR, expr,
+ return build_min_non_dep (COND_EXPR, expr,
orig_ifexp, orig_op1, orig_op2);
return expr;
}
tree build_x_compound_expr_from_list (tree list, const char *msg)
{
tree expr = TREE_VALUE (list);
-
+
if (TREE_CHAIN (list))
{
if (msg)
for (list = TREE_CHAIN (list); list; list = TREE_CHAIN (list))
expr = build_x_compound_expr (expr, TREE_VALUE (list));
}
-
+
return expr;
}
if (processing_template_decl && result != error_mark_node)
return build_min_non_dep (COMPOUND_EXPR, result, orig_op1, orig_op2);
-
+
return result;
}
tree
build_compound_expr (tree lhs, tree rhs)
{
- lhs = decl_constant_value (lhs);
lhs = convert_to_void (lhs, "left-hand operand of comma");
-
+
if (lhs == error_mark_node || rhs == error_mark_node)
return error_mark_node;
-
+
if (TREE_CODE (rhs) == TARGET_EXPR)
{
/* If the rhs is a TARGET_EXPR, then build the compound
- expression inside the target_expr's initializer. This
+ expression inside the target_expr's initializer. This
helps the compiler to eliminate unnecessary temporaries. */
tree init = TREE_OPERAND (rhs, 1);
-
+
init = build2 (COMPOUND_EXPR, TREE_TYPE (init), lhs, init);
TREE_OPERAND (rhs, 1) = init;
-
+
return rhs;
}
-
+
return build2 (COMPOUND_EXPR, TREE_TYPE (rhs), lhs, rhs);
}
-/* Issue an error message if casting from SRC_TYPE to DEST_TYPE casts
- away constness. DESCRIPTION explains what operation is taking
- place. */
+/* Issue a diagnostic message if casting from SRC_TYPE to DEST_TYPE
+ casts away constness. DIAG_FN gives the function to call if we
+ need to issue a diagnostic; if it is NULL, no diagnostic will be
+ issued. DESCRIPTION explains what operation is taking place. */
static void
check_for_casting_away_constness (tree src_type, tree dest_type,
+ void (*diag_fn)(const char *, ...) ATTRIBUTE_GCC_CXXDIAG(1,2),
const char *description)
{
- if (casts_away_constness (src_type, dest_type))
- error ("%s from type `%T' to type `%T' casts away constness",
+ if (diag_fn && casts_away_constness (src_type, dest_type))
+ error ("%s from type %qT to type %qT casts away constness",
description, src_type, dest_type);
}
-/* Return an expression representing static_cast<TYPE>(EXPR). */
+/* Convert EXPR (an expression with pointer-to-member type) to TYPE
+ (another pointer-to-member type in the same hierarchy) and return
+ the converted expression. If ALLOW_INVERSE_P is permitted, a
+ pointer-to-derived may be converted to pointer-to-base; otherwise,
+ only the other direction is permitted. If C_CAST_P is true, this
+ conversion is taking place as part of a C-style cast. */
tree
-build_static_cast (tree type, tree expr)
+convert_ptrmem (tree type, tree expr, bool allow_inverse_p,
+ bool c_cast_p)
{
- tree intype;
- tree result;
+ if (TYPE_PTRMEM_P (type))
+ {
+ tree delta;
- if (type == error_mark_node || expr == error_mark_node)
- return error_mark_node;
-
- if (processing_template_decl)
- {
- expr = build_min (STATIC_CAST_EXPR, type, expr);
- /* We don't know if it will or will not have side effects. */
- TREE_SIDE_EFFECTS (expr) = 1;
- return expr;
+ if (TREE_CODE (expr) == PTRMEM_CST)
+ expr = cplus_expand_constant (expr);
+ delta = get_delta_difference (TYPE_PTRMEM_CLASS_TYPE (TREE_TYPE (expr)),
+ TYPE_PTRMEM_CLASS_TYPE (type),
+ allow_inverse_p,
+ c_cast_p);
+ if (!integer_zerop (delta))
+ expr = cp_build_binary_op (PLUS_EXPR,
+ build_nop (ptrdiff_type_node, expr),
+ delta);
+ return build_nop (type, expr);
}
+ else
+ return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), expr,
+ allow_inverse_p, c_cast_p);
+}
- /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
- Strip such NOP_EXPRs if VALUE is being used in non-lvalue context. */
- if (TREE_CODE (type) != REFERENCE_TYPE
- && TREE_CODE (expr) == NOP_EXPR
- && TREE_TYPE (expr) == TREE_TYPE (TREE_OPERAND (expr, 0)))
- expr = TREE_OPERAND (expr, 0);
+/* Perform a static_cast from EXPR to TYPE. When C_CAST_P is true,
+ this static_cast is being attempted as one of the possible casts
+ allowed by a C-style cast. (In that case, accessibility of base
+ classes is not considered, and it is OK to cast away
+ constness.) Return the result of the cast. *VALID_P is set to
+ indicate whether or not the cast was valid. */
+
+static tree
+build_static_cast_1 (tree type, tree expr, bool c_cast_p,
+ bool *valid_p)
+{
+ tree intype;
+ tree result;
+ tree orig;
+ void (*diag_fn)(const char*, ...) ATTRIBUTE_GCC_CXXDIAG(1,2);
+ const char *desc;
+
+ /* Assume the cast is valid. */
+ *valid_p = true;
intype = TREE_TYPE (expr);
+ /* Determine what to do when casting away constness. */
+ if (c_cast_p)
+ {
+ /* C-style casts are allowed to cast away constness. With
+ WARN_CAST_QUAL, we still want to issue a warning. */
+ diag_fn = warn_cast_qual ? warning0 : NULL;
+ desc = "cast";
+ }
+ else
+ {
+ /* A static_cast may not cast away constness. */
+ diag_fn = error;
+ desc = "static_cast";
+ }
+
/* [expr.static.cast]
An lvalue of type "cv1 B", where B is a class type, can be cast
&& real_lvalue_p (expr)
&& DERIVED_FROM_P (intype, TREE_TYPE (type))
&& can_convert (build_pointer_type (TYPE_MAIN_VARIANT (intype)),
- build_pointer_type (TYPE_MAIN_VARIANT
+ build_pointer_type (TYPE_MAIN_VARIANT
(TREE_TYPE (type))))
- && at_least_as_qualified_p (TREE_TYPE (type), intype))
+ && (c_cast_p
+ || at_least_as_qualified_p (TREE_TYPE (type), intype)))
{
+ tree base;
+
/* There is a standard conversion from "D*" to "B*" even if "B"
- is ambiguous or inaccessible. Therefore, we ask lookup_base
- to check these conditions. */
- tree base = lookup_base (TREE_TYPE (type), intype, ba_check, NULL);
+ is ambiguous or inaccessible. If this is really a
+ static_cast, then we check both for inaccessibility and
+ ambiguity. However, if this is a static_cast being performed
+ because the user wrote a C-style cast, then accessibility is
+ not considered. */
+ base = lookup_base (TREE_TYPE (type), intype,
+ c_cast_p ? ba_unique : ba_check,
+ NULL);
/* Convert from "B*" to "D*". This function will check that "B"
is not a virtual base of "D". */
- expr = build_base_path (MINUS_EXPR, build_address (expr),
+ expr = build_base_path (MINUS_EXPR, build_address (expr),
base, /*nonnull=*/false);
/* Convert the pointer to a reference -- but then remember that
there are no expressions with reference type in C++. */
return convert_from_reference (build_nop (type, expr));
}
+ orig = expr;
+
/* [expr.static.cast]
An expression e can be explicitly converted to a type T using a
static_cast of the form static_cast<T>(e) if the declaration T
t(e);" is well-formed, for some invented temporary variable
t. */
- result = perform_direct_initialization_if_possible (type, expr);
+ result = perform_direct_initialization_if_possible (type, expr,
+ c_cast_p);
if (result)
{
result = convert_from_reference (result);
+
+ /* Ignore any integer overflow caused by the cast. */
+ if (TREE_CODE (result) == INTEGER_CST
+ && CONSTANT_CLASS_P (orig))
+ {
+ TREE_OVERFLOW (result) = TREE_OVERFLOW (orig);
+ TREE_CONSTANT_OVERFLOW (result)
+ = TREE_CONSTANT_OVERFLOW (orig);
+ }
/* [expr.static.cast]
- If T is a reference type, the result is an lvalue; otherwise,
+ If T is a reference type, the result is an lvalue; otherwise,
the result is an rvalue. */
if (TREE_CODE (type) != REFERENCE_TYPE
&& real_lvalue_p (result))
result = build1 (NON_LVALUE_EXPR, TREE_TYPE (result), result);
return result;
}
-
+
/* [expr.static.cast]
Any expression can be explicitly converted to type cv void. */
promotions, floating point promotion, integral conversions,
floating point conversions, floating-integral conversions,
pointer conversions, and pointer to member conversions. */
- if ((ARITHMETIC_TYPE_P (type) && ARITHMETIC_TYPE_P (intype))
- /* DR 128
-
- A value of integral _or enumeration_ type can be explicitly
- converted to an enumeration type. */
- || (INTEGRAL_OR_ENUMERATION_TYPE_P (type)
- && INTEGRAL_OR_ENUMERATION_TYPE_P (intype)))
- /* Really, build_c_cast should defer to this function rather
- than the other way around. */
- return build_c_cast (type, expr);
-
+ /* DR 128
+
+ A value of integral _or enumeration_ type can be explicitly
+ converted to an enumeration type. */
+ /* The effect of all that is that any conversion between any two
+ types which are integral, floating, or enumeration types can be
+ performed. */
+ if ((INTEGRAL_TYPE_P (type) || SCALAR_FLOAT_TYPE_P (type))
+ && (INTEGRAL_TYPE_P (intype) || SCALAR_FLOAT_TYPE_P (intype)))
+ {
+ expr = ocp_convert (type, expr, CONV_C_CAST, LOOKUP_NORMAL);
+
+ /* Ignore any integer overflow caused by the cast. */
+ if (TREE_CODE (expr) == INTEGER_CST
+ && CONSTANT_CLASS_P (orig))
+ {
+ TREE_OVERFLOW (expr) = TREE_OVERFLOW (orig);
+ TREE_CONSTANT_OVERFLOW (expr) = TREE_CONSTANT_OVERFLOW (orig);
+ }
+ return expr;
+ }
+
if (TYPE_PTR_P (type) && TYPE_PTR_P (intype)
&& CLASS_TYPE_P (TREE_TYPE (type))
&& CLASS_TYPE_P (TREE_TYPE (intype))
- && can_convert (build_pointer_type (TYPE_MAIN_VARIANT
- (TREE_TYPE (intype))),
- build_pointer_type (TYPE_MAIN_VARIANT
+ && can_convert (build_pointer_type (TYPE_MAIN_VARIANT
+ (TREE_TYPE (intype))),
+ build_pointer_type (TYPE_MAIN_VARIANT
(TREE_TYPE (type)))))
{
tree base;
- check_for_casting_away_constness (intype, type, "static_cast");
- base = lookup_base (TREE_TYPE (type), TREE_TYPE (intype), ba_check,
+ if (!c_cast_p)
+ check_for_casting_away_constness (intype, type, diag_fn, desc);
+ base = lookup_base (TREE_TYPE (type), TREE_TYPE (intype),
+ c_cast_p ? ba_unique : ba_check,
NULL);
return build_base_path (MINUS_EXPR, expr, base, /*nonnull=*/false);
}
-
+
if ((TYPE_PTRMEM_P (type) && TYPE_PTRMEM_P (intype))
|| (TYPE_PTRMEMFUNC_P (type) && TYPE_PTRMEMFUNC_P (intype)))
{
if (TYPE_PTRMEM_P (type))
{
- t1 = (build_ptrmem_type
+ t1 = (build_ptrmem_type
(c1,
TYPE_MAIN_VARIANT (TYPE_PTRMEM_POINTED_TO_TYPE (intype))));
- t2 = (build_ptrmem_type
+ t2 = (build_ptrmem_type
(c2,
TYPE_MAIN_VARIANT (TYPE_PTRMEM_POINTED_TO_TYPE (type))));
}
}
if (can_convert (t1, t2))
{
- check_for_casting_away_constness (intype, type, "static_cast");
- if (TYPE_PTRMEM_P (type))
- {
- tree delta;
-
- if (TREE_CODE (expr) == PTRMEM_CST)
- expr = cplus_expand_constant (expr);
- delta = get_delta_difference (c1, c2, /*force=*/1);
- if (!integer_zerop (delta))
- expr = cp_build_binary_op (PLUS_EXPR,
- build_nop (ptrdiff_type_node, expr),
- delta);
- return build_nop (type, expr);
- }
- else
- return build_ptrmemfunc (TYPE_PTRMEMFUNC_FN_TYPE (type), expr,
- /*force=*/1);
+ if (!c_cast_p)
+ check_for_casting_away_constness (intype, type, diag_fn,
+ desc);
+ return convert_ptrmem (type, expr, /*allow_inverse_p=*/1,
+ c_cast_p);
}
}
-
+
/* [expr.static.cast]
An rvalue of type "pointer to cv void" can be explicitly
converted to a pointer to object type. A value of type pointer
to object converted to "pointer to cv void" and back to the
original pointer type will have its original value. */
- if (TREE_CODE (intype) == POINTER_TYPE
+ if (TREE_CODE (intype) == POINTER_TYPE
&& VOID_TYPE_P (TREE_TYPE (intype))
&& TYPE_PTROB_P (type))
{
- check_for_casting_away_constness (intype, type, "static_cast");
+ if (!c_cast_p)
+ check_for_casting_away_constness (intype, type, diag_fn, desc);
return build_nop (type, expr);
}
- error ("invalid static_cast from type `%T' to type `%T'", intype, type);
+ *valid_p = false;
return error_mark_node;
}
+/* Return an expression representing static_cast<TYPE>(EXPR). */
+
tree
-build_reinterpret_cast (tree type, tree expr)
+build_static_cast (tree type, tree expr)
{
- tree intype;
+ tree result;
+ bool valid_p;
if (type == error_mark_node || expr == error_mark_node)
return error_mark_node;
if (processing_template_decl)
{
- tree t = build_min (REINTERPRET_CAST_EXPR, type, expr);
-
- if (!TREE_SIDE_EFFECTS (t)
- && type_dependent_expression_p (expr))
- /* There might turn out to be side effects inside expr. */
- TREE_SIDE_EFFECTS (t) = 1;
- return t;
+ expr = build_min (STATIC_CAST_EXPR, type, expr);
+ /* We don't know if it will or will not have side effects. */
+ TREE_SIDE_EFFECTS (expr) = 1;
+ return convert_from_reference (expr);
}
- if (TREE_CODE (type) != REFERENCE_TYPE)
- {
- expr = decay_conversion (expr);
+ /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
+ Strip such NOP_EXPRs if VALUE is being used in non-lvalue context. */
+ if (TREE_CODE (type) != REFERENCE_TYPE
+ && TREE_CODE (expr) == NOP_EXPR
+ && TREE_TYPE (expr) == TREE_TYPE (TREE_OPERAND (expr, 0)))
+ expr = TREE_OPERAND (expr, 0);
- /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
- Strip such NOP_EXPRs if VALUE is being used in non-lvalue context. */
- if (TREE_CODE (expr) == NOP_EXPR
- && TREE_TYPE (expr) == TREE_TYPE (TREE_OPERAND (expr, 0)))
- expr = TREE_OPERAND (expr, 0);
- }
+ result = build_static_cast_1 (type, expr, /*c_cast_p=*/false, &valid_p);
+ if (valid_p)
+ return result;
+
+ error ("invalid static_cast from type %qT to type %qT",
+ TREE_TYPE (expr), type);
+ return error_mark_node;
+}
+
+/* EXPR is an expression with member function or pointer-to-member
+ function type. TYPE is a pointer type. Converting EXPR to TYPE is
+ not permitted by ISO C++, but we accept it in some modes. If we
+ are not in one of those modes, issue a diagnostic. Return the
+ converted expression. */
+
+tree
+convert_member_func_to_ptr (tree type, tree expr)
+{
+ tree intype;
+ tree decl;
intype = TREE_TYPE (expr);
+ gcc_assert (TYPE_PTRMEMFUNC_P (intype)
+ || TREE_CODE (intype) == METHOD_TYPE);
+
+ if (pedantic || warn_pmf2ptr)
+ pedwarn ("converting from %qT to %qT", intype, type);
+
+ if (TREE_CODE (intype) == METHOD_TYPE)
+ expr = build_addr_func (expr);
+ else if (TREE_CODE (expr) == PTRMEM_CST)
+ expr = build_address (PTRMEM_CST_MEMBER (expr));
+ else
+ {
+ decl = maybe_dummy_object (TYPE_PTRMEM_CLASS_TYPE (intype), 0);
+ decl = build_address (decl);
+ expr = get_member_function_from_ptrfunc (&decl, expr);
+ }
+
+ return build_nop (type, expr);
+}
+
+/* Return a representation for a reinterpret_cast from EXPR to TYPE.
+ If C_CAST_P is true, this reinterpret cast is being done as part of
+ a C-style cast. If VALID_P is non-NULL, *VALID_P is set to
+ indicate whether or not reinterpret_cast was valid. */
+
+static tree
+build_reinterpret_cast_1 (tree type, tree expr, bool c_cast_p,
+ bool *valid_p)
+{
+ tree intype;
+
+ /* Assume the cast is invalid. */
+ if (valid_p)
+ *valid_p = true;
- if (intype == error_mark_node)
+ if (type == error_mark_node || error_operand_p (expr))
return error_mark_node;
+ intype = TREE_TYPE (expr);
+
+ /* [expr.reinterpret.cast]
+ An lvalue expression of type T1 can be cast to the type
+ "reference to T2" if an expression of type "pointer to T1" can be
+ explicitly converted to the type "pointer to T2" using a
+ reinterpret_cast. */
if (TREE_CODE (type) == REFERENCE_TYPE)
{
if (! real_lvalue_p (expr))
{
- error ("invalid reinterpret_cast of an rvalue expression of type `%T' to type `%T'", intype, type);
+ error ("invalid cast of an rvalue expression of type "
+ "%qT to type %qT",
+ intype, type);
return error_mark_node;
}
+
+ /* Warn about a reinterpret_cast from "A*" to "B&" if "A" and
+ "B" are related class types; the reinterpret_cast does not
+ adjust the pointer. */
+ if (TYPE_PTR_P (intype)
+ && (comptypes (TREE_TYPE (intype), TREE_TYPE (type),
+ COMPARE_BASE | COMPARE_DERIVED)))
+ warning (0, "casting %qT to %qT does not dereference pointer",
+ intype, type);
+
expr = build_unary_op (ADDR_EXPR, expr, 0);
if (expr != error_mark_node)
- expr = build_reinterpret_cast
- (build_pointer_type (TREE_TYPE (type)), expr);
+ expr = build_reinterpret_cast_1
+ (build_pointer_type (TREE_TYPE (type)), expr, c_cast_p,
+ valid_p);
if (expr != error_mark_node)
expr = build_indirect_ref (expr, 0);
return expr;
}
- else if (same_type_ignoring_top_level_qualifiers_p (intype, type))
- return build_static_cast (type, expr);
- if (TYPE_PTR_P (type) && (TREE_CODE (intype) == INTEGER_TYPE
- || TREE_CODE (intype) == ENUMERAL_TYPE))
- /* OK */;
- else if (TREE_CODE (type) == INTEGER_TYPE && TYPE_PTR_P (intype))
+ /* As a G++ extension, we consider conversions from member
+ functions, and pointers to member functions to
+ pointer-to-function and pointer-to-void types. If
+ -Wno-pmf-conversions has not been specified,
+ convert_member_func_to_ptr will issue an error message. */
+ if ((TYPE_PTRMEMFUNC_P (intype)
+ || TREE_CODE (intype) == METHOD_TYPE)
+ && TYPE_PTR_P (type)
+ && (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE
+ || VOID_TYPE_P (TREE_TYPE (type))))
+ return convert_member_func_to_ptr (type, expr);
+
+ /* If the cast is not to a reference type, the lvalue-to-rvalue,
+ array-to-pointer, and function-to-pointer conversions are
+ performed. */
+ expr = decay_conversion (expr);
+
+ /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
+ Strip such NOP_EXPRs if VALUE is being used in non-lvalue context. */
+ if (TREE_CODE (expr) == NOP_EXPR
+ && TREE_TYPE (expr) == TREE_TYPE (TREE_OPERAND (expr, 0)))
+ expr = TREE_OPERAND (expr, 0);
+
+ if (error_operand_p (expr))
+ return error_mark_node;
+
+ intype = TREE_TYPE (expr);
+
+ /* [expr.reinterpret.cast]
+ A pointer can be converted to any integral type large enough to
+ hold it. */
+ if (CP_INTEGRAL_TYPE_P (type) && TYPE_PTR_P (intype))
{
if (TYPE_PRECISION (type) < TYPE_PRECISION (intype))
- pedwarn ("reinterpret_cast from `%T' to `%T' loses precision",
- intype, type);
- }
+ pedwarn ("cast from %qT to %qT loses precision",
+ intype, type);
+ }
+ /* [expr.reinterpret.cast]
+ A value of integral or enumeration type can be explicitly
+ converted to a pointer. */
+ else if (TYPE_PTR_P (type) && INTEGRAL_OR_ENUMERATION_TYPE_P (intype))
+ /* OK */
+ ;
else if ((TYPE_PTRFN_P (type) && TYPE_PTRFN_P (intype))
|| (TYPE_PTRMEMFUNC_P (type) && TYPE_PTRMEMFUNC_P (intype)))
- {
- expr = decl_constant_value (expr);
- return fold_if_not_in_template (build_nop (type, expr));
- }
+ return fold_if_not_in_template (build_nop (type, expr));
else if ((TYPE_PTRMEM_P (type) && TYPE_PTRMEM_P (intype))
|| (TYPE_PTROBV_P (type) && TYPE_PTROBV_P (intype)))
{
- check_for_casting_away_constness (intype, type, "reinterpret_cast");
- expr = decl_constant_value (expr);
+ if (!c_cast_p)
+ check_for_casting_away_constness (intype, type, error,
+ "reinterpret_cast");
+ /* Warn about possible alignment problems. */
+ if (STRICT_ALIGNMENT && warn_cast_align
+ && !VOID_TYPE_P (type)
+ && TREE_CODE (TREE_TYPE (intype)) != FUNCTION_TYPE
+ && COMPLETE_TYPE_P (TREE_TYPE (type))
+ && COMPLETE_TYPE_P (TREE_TYPE (intype))
+ && TYPE_ALIGN (TREE_TYPE (type)) > TYPE_ALIGN (TREE_TYPE (intype)))
+ warning (0, "cast from %qT to %qT increases required alignment of "
+ "target type",
+ intype, type);
+
return fold_if_not_in_template (build_nop (type, expr));
}
else if ((TYPE_PTRFN_P (type) && TYPE_PTROBV_P (intype))
|| (TYPE_PTRFN_P (intype) && TYPE_PTROBV_P (type)))
{
- pedwarn ("ISO C++ forbids casting between pointer-to-function and pointer-to-object");
- expr = decl_constant_value (expr);
+ if (pedantic)
+ /* Only issue a warning, as we have always supported this
+ where possible, and it is necessary in some cases. DR 195
+ addresses this issue, but as of 2004/10/26 is still in
+ drafting. */
+ warning (0, "ISO C++ forbids casting between pointer-to-function and pointer-to-object");
return fold_if_not_in_template (build_nop (type, expr));
}
+ else if (TREE_CODE (type) == VECTOR_TYPE)
+ return fold_if_not_in_template (convert_to_vector (type, expr));
+ else if (TREE_CODE (intype) == VECTOR_TYPE)
+ return fold_if_not_in_template (convert_to_integer (type, expr));
else
{
- error ("invalid reinterpret_cast from type `%T' to type `%T'",
- intype, type);
+ if (valid_p)
+ *valid_p = false;
+ error ("invalid cast from type %qT to type %qT", intype, type);
return error_mark_node;
}
-
+
return cp_convert (type, expr);
}
tree
-build_const_cast (tree type, tree expr)
+build_reinterpret_cast (tree type, tree expr)
{
- tree intype;
-
if (type == error_mark_node || expr == error_mark_node)
return error_mark_node;
if (processing_template_decl)
{
- tree t = build_min (CONST_CAST_EXPR, type, expr);
-
+ tree t = build_min (REINTERPRET_CAST_EXPR, type, expr);
+
if (!TREE_SIDE_EFFECTS (t)
&& type_dependent_expression_p (expr))
/* There might turn out to be side effects inside expr. */
TREE_SIDE_EFFECTS (t) = 1;
- return t;
+ return convert_from_reference (t);
}
- if (!POINTER_TYPE_P (type) && !TYPE_PTRMEM_P (type))
- error ("invalid use of const_cast with type `%T', which is not a pointer, reference, nor a pointer-to-data-member type", type);
- else if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
- {
- error ("invalid use of const_cast with type `%T', which is a pointer or reference to a function type", type);
+ return build_reinterpret_cast_1 (type, expr, /*c_cast_p=*/false,
+ /*valid_p=*/NULL);
+}
+
+/* Perform a const_cast from EXPR to TYPE. If the cast is valid,
+ return an appropriate expression. Otherwise, return
+ error_mark_node. If the cast is not valid, and COMPLAIN is true,
+ then a diagnostic will be issued. If VALID_P is non-NULL, its
+ value upon return will indicate whether or not the conversion
+ succeeded. */
+
+static tree
+build_const_cast_1 (tree dst_type, tree expr, bool complain,
+ bool *valid_p)
+{
+ tree src_type;
+ tree reference_type;
+
+ /* Callers are responsible for handling error_mark_node as a
+ destination type. */
+ gcc_assert (dst_type != error_mark_node);
+ /* In a template, callers should be building syntactic
+ representations of casts, not using this machinery. */
+ gcc_assert (!processing_template_decl);
+
+ /* Assume the conversion is invalid. */
+ if (valid_p)
+ *valid_p = false;
+
+ if (!POINTER_TYPE_P (dst_type) && !TYPE_PTRMEM_P (dst_type))
+ {
+ if (complain)
+ error ("invalid use of const_cast with type %qT, "
+ "which is not a pointer, "
+ "reference, nor a pointer-to-data-member type", dst_type);
return error_mark_node;
}
- if (TREE_CODE (type) != REFERENCE_TYPE)
+ if (TREE_CODE (TREE_TYPE (dst_type)) == FUNCTION_TYPE)
{
- expr = decay_conversion (expr);
-
- /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
- Strip such NOP_EXPRs if VALUE is being used in non-lvalue context. */
- if (TREE_CODE (expr) == NOP_EXPR
- && TREE_TYPE (expr) == TREE_TYPE (TREE_OPERAND (expr, 0)))
- expr = TREE_OPERAND (expr, 0);
+ if (complain)
+ error ("invalid use of const_cast with type %qT, which is a pointer "
+ "or reference to a function type", dst_type);
+ return error_mark_node;
}
- intype = TREE_TYPE (expr);
-
- if (same_type_ignoring_top_level_qualifiers_p (intype, type))
- return build_static_cast (type, expr);
- else if (TREE_CODE (type) == REFERENCE_TYPE)
+ src_type = TREE_TYPE (expr);
+ /* Expressions do not really have reference types. */
+ if (TREE_CODE (src_type) == REFERENCE_TYPE)
+ src_type = TREE_TYPE (src_type);
+
+ /* [expr.const.cast]
+
+ An lvalue of type T1 can be explicitly converted to an lvalue of
+ type T2 using the cast const_cast<T2&> (where T1 and T2 are object
+ types) if a pointer to T1 can be explicitly converted to the type
+ pointer to T2 using a const_cast. */
+ if (TREE_CODE (dst_type) == REFERENCE_TYPE)
{
+ reference_type = dst_type;
if (! real_lvalue_p (expr))
{
- error ("invalid const_cast of an rvalue of type `%T' to type `%T'", intype, type);
+ if (complain)
+ error ("invalid const_cast of an rvalue of type %qT to type %qT",
+ src_type, dst_type);
return error_mark_node;
}
+ dst_type = build_pointer_type (TREE_TYPE (dst_type));
+ src_type = build_pointer_type (src_type);
+ }
+ else
+ {
+ reference_type = NULL_TREE;
+ /* If the destination type is not a reference type, the
+ lvalue-to-rvalue, array-to-pointer, and function-to-pointer
+ conversions are performed. */
+ src_type = type_decays_to (src_type);
+ if (src_type == error_mark_node)
+ return error_mark_node;
+ }
- if (comp_ptr_ttypes_const (TREE_TYPE (type), intype))
+ if ((TYPE_PTR_P (src_type) || TYPE_PTRMEM_P (src_type))
+ && comp_ptr_ttypes_const (dst_type, src_type))
+ {
+ if (valid_p)
+ *valid_p = true;
+ if (reference_type)
{
expr = build_unary_op (ADDR_EXPR, expr, 0);
- expr = build1 (NOP_EXPR, type, expr);
+ expr = build_nop (reference_type, expr);
return convert_from_reference (expr);
}
+ else
+ {
+ expr = decay_conversion (expr);
+ /* build_c_cast puts on a NOP_EXPR to make the result not an
+ lvalue. Strip such NOP_EXPRs if VALUE is being used in
+ non-lvalue context. */
+ if (TREE_CODE (expr) == NOP_EXPR
+ && TREE_TYPE (expr) == TREE_TYPE (TREE_OPERAND (expr, 0)))
+ expr = TREE_OPERAND (expr, 0);
+ return build_nop (dst_type, expr);
+ }
}
- else if (((TREE_CODE (type) == POINTER_TYPE
- && TREE_CODE (intype) == POINTER_TYPE)
- || (TYPE_PTRMEM_P (type) && TYPE_PTRMEM_P (intype)))
- && comp_ptr_ttypes_const (TREE_TYPE (type), TREE_TYPE (intype)))
- return cp_convert (type, expr);
- error ("invalid const_cast from type `%T' to type `%T'", intype, type);
+ if (complain)
+ error ("invalid const_cast from type %qT to type %qT",
+ src_type, dst_type);
return error_mark_node;
}
-/* Build an expression representing a cast to type TYPE of expression EXPR.
+tree
+build_const_cast (tree type, tree expr)
+{
+ if (type == error_mark_node || error_operand_p (expr))
+ return error_mark_node;
+
+ if (processing_template_decl)
+ {
+ tree t = build_min (CONST_CAST_EXPR, type, expr);
+
+ if (!TREE_SIDE_EFFECTS (t)
+ && type_dependent_expression_p (expr))
+ /* There might turn out to be side effects inside expr. */
+ TREE_SIDE_EFFECTS (t) = 1;
+ return convert_from_reference (t);
+ }
+
+ return build_const_cast_1 (type, expr, /*complain=*/true,
+ /*valid_p=*/NULL);
+}
- ALLOW_NONCONVERTING is true if we should allow non-converting constructors
- when doing the cast. */
+/* Build an expression representing an explicit C-style cast to type
+ TYPE of expression EXPR. */
tree
build_c_cast (tree type, tree expr)
{
tree value = expr;
- tree otype;
+ tree result;
+ bool valid_p;
- if (type == error_mark_node || expr == error_mark_node)
+ if (type == error_mark_node || error_operand_p (expr))
return error_mark_node;
if (processing_template_decl)
tree_cons (NULL_TREE, value, NULL_TREE));
/* We don't know if it will or will not have side effects. */
TREE_SIDE_EFFECTS (t) = 1;
- return t;
+ return convert_from_reference (t);
}
/* Casts to a (pointer to a) specific ObjC class (or 'id' or
NIHCL uses it. It is not valid ISO C++ however. */
if (TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE)
{
- pedwarn ("ISO C++ forbids casting to an array type `%T'", type);
+ pedwarn ("ISO C++ forbids casting to an array type %qT", type);
type = build_pointer_type (TREE_TYPE (type));
}
else
{
- error ("ISO C++ forbids casting to an array type `%T'", type);
+ error ("ISO C++ forbids casting to an array type %qT", type);
return error_mark_node;
}
}
if (TREE_CODE (type) == FUNCTION_TYPE
|| TREE_CODE (type) == METHOD_TYPE)
{
- error ("invalid cast to function type `%T'", type);
+ error ("invalid cast to function type %qT", type);
return error_mark_node;
}
- if (TREE_CODE (type) == VOID_TYPE)
- {
- /* Conversion to void does not cause any of the normal function to
- * pointer, array to pointer and lvalue to rvalue decays. */
-
- value = convert_to_void (value, /*implicit=*/NULL);
- return value;
- }
-
- if (!complete_type_or_else (type, NULL_TREE))
- return error_mark_node;
-
- /* Convert functions and arrays to pointers and
- convert references to their expanded types,
- but don't convert any other types. If, however, we are
- casting to a class type, there's no reason to do this: the
- cast will only succeed if there is a converting constructor,
- and the default conversions will be done at that point. In
- fact, doing the default conversion here is actually harmful
- in cases like this:
-
- typedef int A[2];
- struct S { S(const A&); };
-
- since we don't want the array-to-pointer conversion done. */
- if (!IS_AGGR_TYPE (type))
- {
- if (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE
- || (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE
- /* Don't do the default conversion on a ->* expression. */
- && ! (TREE_CODE (type) == POINTER_TYPE
- && bound_pmf_p (value)))
- || TREE_CODE (TREE_TYPE (value)) == ARRAY_TYPE
- || TREE_CODE (TREE_TYPE (value)) == REFERENCE_TYPE)
- value = decay_conversion (value);
- }
- else if (TREE_CODE (TREE_TYPE (value)) == REFERENCE_TYPE)
- /* However, even for class types, we still need to strip away
- the reference type, since the call to convert_force below
- does not expect the input expression to be of reference
- type. */
- value = convert_from_reference (value);
-
- otype = TREE_TYPE (value);
-
- /* Optionally warn about potentially worrisome casts. */
-
- if (warn_cast_qual
- && TREE_CODE (type) == POINTER_TYPE
- && TREE_CODE (otype) == POINTER_TYPE
- && !at_least_as_qualified_p (TREE_TYPE (type),
- TREE_TYPE (otype)))
- warning ("cast from `%T' to `%T' discards qualifiers from pointer target type",
- otype, type);
-
- if (TREE_CODE (type) == INTEGER_TYPE
- && TYPE_PTR_P (otype)
- && TYPE_PRECISION (type) != TYPE_PRECISION (otype))
- warning ("cast from pointer to integer of different size");
-
- if (TYPE_PTR_P (type)
- && TREE_CODE (otype) == INTEGER_TYPE
- && TYPE_PRECISION (type) != TYPE_PRECISION (otype)
- /* Don't warn about converting any constant. */
- && !TREE_CONSTANT (value))
- warning ("cast to pointer from integer of different size");
+ /* A C-style cast can be a const_cast. */
+ result = build_const_cast_1 (type, value, /*complain=*/false,
+ &valid_p);
+ if (valid_p)
+ return result;
- if (TREE_CODE (type) == REFERENCE_TYPE)
- value = (convert_from_reference
- (convert_to_reference (type, value, CONV_C_CAST,
- LOOKUP_COMPLAIN, NULL_TREE)));
- else
+ /* Or a static cast. */
+ result = build_static_cast_1 (type, value, /*c_cast_p=*/true,
+ &valid_p);
+ /* Or a reinterpret_cast. */
+ if (!valid_p)
+ result = build_reinterpret_cast_1 (type, value, /*c_cast_p=*/true,
+ &valid_p);
+ /* The static_cast or reinterpret_cast may be followed by a
+ const_cast. */
+ if (valid_p
+ /* A valid cast may result in errors if, for example, a
+ conversion to am ambiguous base class is required. */
+ && !error_operand_p (result))
{
- tree ovalue;
-
- value = decl_constant_value (value);
-
- ovalue = value;
- value = convert_force (type, value, CONV_C_CAST);
+ tree result_type;
- /* Ignore any integer overflow caused by the cast. */
- if (TREE_CODE (value) == INTEGER_CST)
+ /* Non-class rvalues always have cv-unqualified type. */
+ if (!CLASS_TYPE_P (type))
+ type = TYPE_MAIN_VARIANT (type);
+ result_type = TREE_TYPE (result);
+ if (!CLASS_TYPE_P (result_type))
+ result_type = TYPE_MAIN_VARIANT (result_type);
+ /* If the type of RESULT does not match TYPE, perform a
+ const_cast to make it match. If the static_cast or
+ reinterpret_cast succeeded, we will differ by at most
+ cv-qualification, so the follow-on const_cast is guaranteed
+ to succeed. */
+ if (!same_type_p (non_reference (type), non_reference (result_type)))
{
- TREE_OVERFLOW (value) = TREE_OVERFLOW (ovalue);
-
- if (CONSTANT_CLASS_P (ovalue))
- TREE_CONSTANT_OVERFLOW (value) = TREE_CONSTANT_OVERFLOW (ovalue);
+ result = build_const_cast_1 (type, result, false, &valid_p);
+ gcc_assert (valid_p);
}
+ return result;
}
- /* Warn about possible alignment problems. Do this here when we will have
- instantiated any necessary template types. */
- if (STRICT_ALIGNMENT && warn_cast_align
- && TREE_CODE (type) == POINTER_TYPE
- && TREE_CODE (otype) == POINTER_TYPE
- && TREE_CODE (TREE_TYPE (otype)) != VOID_TYPE
- && TREE_CODE (TREE_TYPE (otype)) != FUNCTION_TYPE
- && COMPLETE_TYPE_P (TREE_TYPE (otype))
- && COMPLETE_TYPE_P (TREE_TYPE (type))
- && TYPE_ALIGN (TREE_TYPE (type)) > TYPE_ALIGN (TREE_TYPE (otype)))
- warning ("cast from `%T' to `%T' increases required alignment of target type",
- otype, type);
-
- /* Always produce some operator for an explicit cast,
- so we can tell (for -pedantic) that the cast is no lvalue. */
- if (TREE_CODE (type) != REFERENCE_TYPE && value == expr
- && real_lvalue_p (value))
- value = non_lvalue (value);
-
- return value;
+ return error_mark_node;
}
\f
/* Build an assignment expression of lvalue LHS from value RHS.
case MAX_EXPR:
/* MIN_EXPR and MAX_EXPR are currently only permitted as lvalues,
when neither operand has side-effects. */
- if (!lvalue_or_else (lhs, "assignment"))
+ if (!lvalue_or_else (lhs, lv_assign))
return error_mark_node;
gcc_assert (!TREE_SIDE_EFFECTS (TREE_OPERAND (lhs, 0))
tree preeval = NULL_TREE;
rhs = stabilize_expr (rhs, &preeval);
-
+
/* Check this here to avoid odd errors when trying to convert
a throw to the type of the COND_EXPR. */
- if (!lvalue_or_else (lhs, "assignment"))
+ if (!lvalue_or_else (lhs, lv_assign))
return error_mark_node;
cond = build_conditional_expr
cond = build2 (COMPOUND_EXPR, TREE_TYPE (lhs), preeval, cond);
return cond;
}
-
+
default:
break;
}
}
else
{
- if (TREE_CODE (lhstype) == REFERENCE_TYPE)
- {
- lhs = convert_from_reference (lhs);
- olhstype = lhstype = TREE_TYPE (lhs);
- }
lhs = require_complete_type (lhs);
if (lhs == error_mark_node)
return error_mark_node;
else
{
/* A binary op has been requested. Combine the old LHS
- value with the RHS producing the value we should actually
- store into the LHS. */
+ value with the RHS producing the value we should actually
+ store into the LHS. */
gcc_assert (!PROMOTES_TO_AGGR_TYPE (lhstype, REFERENCE_TYPE));
lhs = stabilize_reference (lhs);
newrhs = cp_build_binary_op (modifycode, lhs, rhs);
if (newrhs == error_mark_node)
{
- error (" in evaluation of `%Q(%#T, %#T)'", modifycode,
+ error (" in evaluation of %<%Q(%#T, %#T)%>", modifycode,
TREE_TYPE (lhs), TREE_TYPE (rhs));
return error_mark_node;
}
-
+
/* Now it looks like a plain assignment. */
modifycode = NOP_EXPR;
}
}
/* The left-hand side must be an lvalue. */
- if (!lvalue_or_else (lhs, "assignment"))
+ if (!lvalue_or_else (lhs, lv_assign))
return error_mark_node;
/* Warn about modifying something that is `const'. Don't warn if
if (TREE_CODE (lhstype) == ARRAY_TYPE)
{
int from_array;
-
+
if (!same_or_base_type_p (TYPE_MAIN_VARIANT (lhstype),
TYPE_MAIN_VARIANT (TREE_TYPE (rhs))))
{
- error ("incompatible types in assignment of `%T' to `%T'",
+ error ("incompatible types in assignment of %qT to %qT",
TREE_TYPE (rhs), lhstype);
return error_mark_node;
}
pedwarn ("ISO C++ forbids assignment of arrays");
from_array = TREE_CODE (TREE_TYPE (newrhs)) == ARRAY_TYPE
- ? 1 + (modifycode != INIT_EXPR): 0;
+ ? 1 + (modifycode != INIT_EXPR): 0;
return build_vec_init (lhs, NULL_TREE, newrhs, from_array);
}
if (newrhs == error_mark_node)
return error_mark_node;
+ if (c_dialect_objc () && flag_objc_gc)
+ {
+ result = objc_generate_write_barrier (lhs, modifycode, newrhs);
+
+ if (result)
+ return result;
+ }
+
result = build2 (modifycode == NOP_EXPR ? MODIFY_EXPR : INIT_EXPR,
lhstype, lhs, newrhs);
\f
/* Get difference in deltas for different pointer to member function
types. Returns an integer constant of type PTRDIFF_TYPE_NODE. If
- the conversion is invalid, the constant is zero. If FORCE is true,
- then allow reverse conversions as well.
+ the conversion is invalid, the constant is zero. If
+ ALLOW_INVERSE_P is true, then allow reverse conversions as well.
+ If C_CAST_P is true this conversion is taking place as part of a
+ C-style cast.
Note that the naming of FROM and TO is kind of backwards; the return
value is what we add to a TO in order to get a FROM. They are named
a pointer to member of FROM to a pointer to member of TO. */
static tree
-get_delta_difference (tree from, tree to, int force)
+get_delta_difference (tree from, tree to,
+ bool allow_inverse_p,
+ bool c_cast_p)
{
tree binfo;
- tree virt_binfo;
base_kind kind;
tree result;
/* Assume no conversion is required. */
result = integer_zero_node;
- binfo = lookup_base (to, from, ba_check, &kind);
+ binfo = lookup_base (to, from, c_cast_p ? ba_unique : ba_check, &kind);
if (kind == bk_inaccessible || kind == bk_ambig)
error (" in pointer to member function conversion");
- else if (!binfo)
+ else if (binfo)
{
- if (!force)
- {
- error_not_base_type (from, to);
- error (" in pointer to member conversion");
- }
+ if (kind != bk_via_virtual)
+ result = BINFO_OFFSET (binfo);
else
{
- binfo = lookup_base (from, to, ba_check, &kind);
- if (binfo)
- {
- virt_binfo = binfo_from_vbase (binfo);
- if (virt_binfo)
- /* This is a reinterpret cast, we choose to do nothing. */
- warning ("pointer to member cast via virtual base `%T'",
- BINFO_TYPE (virt_binfo));
- else
- result = size_diffop (size_zero_node, BINFO_OFFSET (binfo));
- }
+ tree virt_binfo = binfo_from_vbase (binfo);
+
+ /* This is a reinterpret cast, we choose to do nothing. */
+ if (allow_inverse_p)
+ warning (0, "pointer to member cast via virtual base %qT",
+ BINFO_TYPE (virt_binfo));
+ else
+ error ("pointer to member conversion via virtual base %qT",
+ BINFO_TYPE (virt_binfo));
}
}
+ else if (same_type_ignoring_top_level_qualifiers_p (from, to))
+ /* Pointer to member of incomplete class is permitted*/;
+ else if (!allow_inverse_p)
+ {
+ error_not_base_type (from, to);
+ error (" in pointer to member conversion");
+ }
else
{
- virt_binfo = binfo_from_vbase (binfo);
- if (!virt_binfo)
- result = BINFO_OFFSET (binfo);
- else
+ binfo = lookup_base (from, to, c_cast_p ? ba_unique : ba_check, &kind);
+ if (binfo)
{
- /* This is a reinterpret cast, we choose to do nothing. */
- if (force)
- warning ("pointer to member cast via virtual base `%T'",
- BINFO_TYPE (virt_binfo));
+ if (kind != bk_via_virtual)
+ result = size_diffop (size_zero_node, BINFO_OFFSET (binfo));
else
- error ("pointer to member conversion via virtual base `%T'",
- BINFO_TYPE (virt_binfo));
+ {
+ /* This is a reinterpret cast, we choose to do nothing. */
+ tree virt_binfo = binfo_from_vbase (binfo);
+
+ warning (0, "pointer to member cast via virtual base %qT",
+ BINFO_TYPE (virt_binfo));
+ }
}
}
- return fold_if_not_in_template (convert_to_integer (ptrdiff_type_node,
+ return fold_if_not_in_template (convert_to_integer (ptrdiff_type_node,
result));
}
TREE_STATIC (u) = (TREE_CONSTANT (u)
&& (initializer_constant_valid_p (pfn, TREE_TYPE (pfn))
!= NULL_TREE)
- && (initializer_constant_valid_p (delta, TREE_TYPE (delta))
+ && (initializer_constant_valid_p (delta, TREE_TYPE (delta))
!= NULL_TREE));
return u;
}
If FORCE is nonzero, then force this conversion, even if
we would rather not do it. Usually set when using an explicit
- cast.
+ cast. A C-style cast is being processed iff C_CAST_P is true.
Return error_mark_node, if something goes wrong. */
tree
-build_ptrmemfunc (tree type, tree pfn, int force)
+build_ptrmemfunc (tree type, tree pfn, int force, bool c_cast_p)
{
tree fn;
tree pfn_type;
tree npfn = NULL_TREE;
tree n;
- if (!force
+ if (!force
&& !can_convert_arg (to_type, TREE_TYPE (pfn), pfn))
- error ("invalid conversion to type `%T' from type `%T'",
- to_type, pfn_type);
+ error ("invalid conversion to type %qT from type %qT",
+ to_type, pfn_type);
n = get_delta_difference (TYPE_PTRMEMFUNC_OBJECT_TYPE (pfn_type),
TYPE_PTRMEMFUNC_OBJECT_TYPE (to_type),
- force);
+ force,
+ c_cast_p);
/* We don't have to do any conversion to convert a
pointer-to-member to its own type. But, we don't want to
{
pfn = build_c_cast (type, integer_zero_node);
return build_ptrmemfunc1 (to_type,
- integer_zero_node,
+ integer_zero_node,
pfn);
}
return instantiate_type (type, pfn, tf_error | tf_warning);
fn = TREE_OPERAND (pfn, 0);
- gcc_assert (TREE_CODE (fn) == FUNCTION_DECL);
+ gcc_assert (TREE_CODE (fn) == FUNCTION_DECL
+ /* In a template, we will have preserved the
+ OFFSET_REF. */
+ || (processing_template_decl && TREE_CODE (fn) == OFFSET_REF));
return make_ptrmem_cst (to_type, fn);
}
ptr_class = TYPE_PTRMEMFUNC_OBJECT_TYPE (type);
/* First, calculate the adjustment to the function's class. */
- *delta = get_delta_difference (fn_class, ptr_class, /*force=*/0);
+ *delta = get_delta_difference (fn_class, ptr_class, /*force=*/0,
+ /*c_cast_p=*/0);
if (!DECL_VIRTUAL_P (fn))
*pfn = convert (TYPE_PTRMEMFUNC_FN_TYPE (type), build_addr_func (fn));
else
{
/* If we're dealing with a virtual function, we have to adjust 'this'
- again, to point to the base which provides the vtable entry for
- fn; the call will do the opposite adjustment. */
+ again, to point to the base which provides the vtable entry for
+ fn; the call will do the opposite adjustment. */
tree orig_class = DECL_CONTEXT (fn);
tree binfo = binfo_or_else (orig_class, fn_class);
*delta = build2 (PLUS_EXPR, TREE_TYPE (*delta),
{
tree delta;
tree pfn;
-
+
expand_ptrmemfunc_cst (t, &delta, &pfn);
if (pfn)
return pfn;
return build_ptrmemfunc_access_expr (t, pfn_identifier);
}
-/* Expression EXPR is about to be implicitly converted to TYPE. Warn
- if this is a potentially dangerous thing to do. Returns a possibly
- marked EXPR. */
-
-tree
-dubious_conversion_warnings (tree type, tree expr,
- const char *errtype, tree fndecl, int parmnum)
-{
- type = non_reference (type);
-
- /* Issue warnings about peculiar, but valid, uses of NULL. */
- if (ARITHMETIC_TYPE_P (type) && expr == null_node)
- {
- if (fndecl)
- warning ("passing NULL used for non-pointer %s %P of `%D'",
- errtype, parmnum, fndecl);
- else
- warning ("%s to non-pointer type `%T' from NULL", errtype, type);
- }
-
- /* Warn about assigning a floating-point type to an integer type. */
- if (TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE
- && TREE_CODE (type) == INTEGER_TYPE)
- {
- if (fndecl)
- warning ("passing `%T' for %s %P of `%D'",
- TREE_TYPE (expr), errtype, parmnum, fndecl);
- else
- warning ("%s to `%T' from `%T'", errtype, type, TREE_TYPE (expr));
- }
- /* And warn about assigning a negative value to an unsigned
- variable. */
- else if (TYPE_UNSIGNED (type) && TREE_CODE (type) != BOOLEAN_TYPE)
- {
- if (TREE_CODE (expr) == INTEGER_CST && TREE_NEGATED_INT (expr))
- {
- if (fndecl)
- warning ("passing negative value `%E' for %s %P of `%D'",
- expr, errtype, parmnum, fndecl);
- else
- warning ("%s of negative value `%E' to `%T'",
- errtype, expr, type);
- }
-
- overflow_warning (expr);
-
- if (TREE_CONSTANT (expr))
- expr = fold_if_not_in_template (expr);
- }
- return expr;
-}
-
/* Convert value RHS to type TYPE as preparation for an assignment to
an lvalue of type TYPE. ERRTYPE is a string to use in error
messages: "assignment", "return", etc. If FNDECL is non-NULL, we
/* Simplify the RHS if possible. */
if (TREE_CODE (rhs) == CONST_DECL)
rhs = DECL_INITIAL (rhs);
-
- /* We do not use decl_constant_value here because of this case:
- const char* const s = "s";
-
- The conversion rules for a string literal are more lax than for a
- variable; in particular, a string literal can be converted to a
- "char *" but the variable "s" cannot be converted in the same
- way. If the conversion is allowed, the optimization should be
- performed while creating the converted expression. */
+ if (c_dialect_objc ())
+ {
+ int parmno;
+ tree rname = fndecl;
+
+ if (!strcmp (errtype, "assignment"))
+ parmno = -1;
+ else if (!strcmp (errtype, "initialization"))
+ parmno = -2;
+ else
+ {
+ tree selector = objc_message_selector ();
+
+ parmno = parmnum;
+
+ if (selector && parmno > 1)
+ {
+ rname = selector;
+ parmno -= 1;
+ }
+ }
+
+ if (objc_compare_types (type, rhstype, parmno, rname))
+ return convert (type, rhs);
+ }
/* [expr.ass]
/* When -Wno-pmf-conversions is use, we just silently allow
conversions from pointers-to-members to plain pointers. If
the conversion doesn't work, cp_convert will complain. */
- if (!warn_pmf2ptr
- && TYPE_PTR_P (type)
+ if (!warn_pmf2ptr
+ && TYPE_PTR_P (type)
&& TYPE_PTRMEMFUNC_P (rhstype))
rhs = cp_convert (strip_top_quals (type), rhs);
else
if (rhstype == unknown_type_node)
instantiate_type (type, rhs, tf_error | tf_warning);
else if (fndecl)
- error ("cannot convert `%T' to `%T' for argument `%P' to `%D'",
- rhstype, type, parmnum, fndecl);
+ error ("cannot convert %qT to %qT for argument %qP to %qD",
+ rhstype, type, parmnum, fndecl);
else
- error ("cannot convert `%T' to `%T' in %s", rhstype, type,
- errtype);
+ error ("cannot convert %qT to %qT in %s", rhstype, type, errtype);
return error_mark_node;
}
}
|| (TREE_CODE (rhs) == TREE_LIST && TREE_VALUE (rhs) == error_mark_node))
return error_mark_node;
- if (TREE_CODE (TREE_TYPE (rhs)) == REFERENCE_TYPE)
- rhs = convert_from_reference (rhs);
-
if ((TREE_CODE (TREE_TYPE (rhs)) == ARRAY_TYPE
&& TREE_CODE (type) != ARRAY_TYPE
&& (TREE_CODE (type) != REFERENCE_TYPE
/* We accept references to incomplete types, so we can
return here before checking if RHS is of complete type. */
-
+
if (codel == REFERENCE_TYPE)
{
/* This should eventually happen in convert_arguments. */
if (fndecl)
{
if (warningcount > savew)
- cp_warning_at ("in passing argument %P of `%+D'", parmnum, fndecl);
+ cp_warning_at ("in passing argument %P of %q+D", parmnum, fndecl);
else if (errorcount > savee)
- cp_error_at ("in passing argument %P of `%+D'", parmnum, fndecl);
+ cp_error_at ("in passing argument %P of %q+D", parmnum, fndecl);
}
return rhs;
- }
+ }
if (exp != 0)
exp = require_complete_type (exp);
if (TREE_CODE (whats_returned) != ADDR_EXPR)
return;
- whats_returned = TREE_OPERAND (whats_returned, 0);
+ whats_returned = TREE_OPERAND (whats_returned, 0);
if (TREE_CODE (valtype) == REFERENCE_TYPE)
{
if (TREE_CODE (whats_returned) == AGGR_INIT_EXPR
|| TREE_CODE (whats_returned) == TARGET_EXPR)
{
- warning ("returning reference to temporary");
+ warning (0, "returning reference to temporary");
return;
}
- if (TREE_CODE (whats_returned) == VAR_DECL
+ if (TREE_CODE (whats_returned) == VAR_DECL
&& DECL_NAME (whats_returned)
&& TEMP_NAME_P (DECL_NAME (whats_returned)))
{
- warning ("reference to non-lvalue returned");
+ warning (0, "reference to non-lvalue returned");
return;
}
}
|| TREE_PUBLIC (whats_returned)))
{
if (TREE_CODE (valtype) == REFERENCE_TYPE)
- cp_warning_at ("reference to local variable `%D' returned",
+ cp_warning_at ("reference to local variable %qD returned",
whats_returned);
else
- cp_warning_at ("address of local variable `%D' returned",
+ cp_warning_at ("address of local variable %qD returned",
whats_returned);
return;
}
(This is a G++ extension, used to get better code for functions
that call the `volatile' function.) */
if (TREE_THIS_VOLATILE (current_function_decl))
- warning ("function declared `noreturn' has a `return' statement");
+ warning (0, "function declared %<noreturn%> has a %<return%> statement");
/* Check for various simple errors. */
if (DECL_DESTRUCTOR_P (current_function_decl))
current_function_returns_value = 1;
return retval;
}
-
+
/* When no explicit return-value is given in a function with a named
return value, the named return value is used. */
result = DECL_RESULT (current_function_decl);
that's supposed to return a value. */
if (!retval && fn_returns_value_p)
{
- pedwarn ("return-statement with no value, in function returning '%T'",
+ pedwarn ("return-statement with no value, in function returning %qT",
valtype);
/* Clear this, so finish_function won't say that we reach the
end of a non-void function (which we don't, we gave a
/* Check for a return statement with a value in a function that
isn't supposed to return a value. */
else if (retval && !fn_returns_value_p)
- {
+ {
if (VOID_TYPE_P (TREE_TYPE (retval)))
/* You can return a `void' value from a function of `void'
type. In that case, we have to evaluate the expression for
finish_expr_stmt (retval);
else
pedwarn ("return-statement with a value, in function "
- "returning 'void'");
+ "returning 'void'");
current_function_returns_null = 1;
/* Remember that this function did return a value. */
current_function_returns_value = 1;
+ /* Check for erroneous operands -- but after giving ourselves a
+ chance to provide an error about returning a value from a void
+ function. */
+ if (error_operand_p (retval))
+ {
+ current_function_return_value = error_mark_node;
+ return error_mark_node;
+ }
+
/* Only operator new(...) throw(), can return NULL [expr.new/13]. */
if ((DECL_OVERLOADED_OPERATOR_P (current_function_decl) == NEW_EXPR
|| DECL_OVERLOADED_OPERATOR_P (current_function_decl) == VEC_NEW_EXPR)
&& !TYPE_NOTHROW_P (TREE_TYPE (current_function_decl))
&& ! flag_check_new
&& null_ptr_cst_p (retval))
- warning ("`operator new' must not return NULL unless it is declared `throw()' (or -fcheck-new is in effect)");
+ warning (0, "%<operator new%> must not return NULL unless it is "
+ "declared %<throw()%> (or -fcheck-new is in effect)");
/* Effective C++ rule 15. See also start_function. */
if (warn_ecpp
}
if (warn)
- warning ("`operator=' should return a reference to `*this'");
+ warning (0, "%<operator=%> should return a reference to %<*this%>");
}
/* The fabled Named Return Value optimization, as per [class.copy]/15:
/* We don't need to do any conversions when there's nothing being
returned. */
- if (!retval || retval == error_mark_node)
- return retval;
+ if (!retval)
+ return NULL_TREE;
/* Do any required conversions. */
if (retval == result || DECL_CONSTRUCTOR_P (current_function_decl))
/* First convert the value to the function's return type, then
to the type of return value's location to handle the
- case that functype is smaller than the valtype. */
+ case that functype is smaller than the valtype. */
retval = convert_for_initialization
(NULL_TREE, functype, retval, LOOKUP_NORMAL|LOOKUP_ONLYCONVERTING,
"return", NULL_TREE, 0);
else
maybe_warn_about_returning_address_of_local (retval);
}
-
+
/* Actually copy the value returned into the appropriate location. */
if (retval && retval != result)
retval = build2 (INIT_EXPR, TREE_TYPE (result), result, retval);
so the usual checks are not appropriate. */
if (TREE_CODE (to) != FUNCTION_TYPE && TREE_CODE (to) != METHOD_TYPE)
{
- if (!at_least_as_qualified_p (to, from))
+ /* In Objective-C++, some types may have been 'volatilized' by
+ the compiler for EH; when comparing them here, the volatile
+ qualification must be ignored. */
+ bool objc_quals_match = objc_type_quals_match (to, from);
+
+ if (!at_least_as_qualified_p (to, from) && !objc_quals_match)
return 0;
- if (!at_least_as_qualified_p (from, to))
+ if (!at_least_as_qualified_p (from, to) && !objc_quals_match)
{
if (constp == 0)
return 0;
if (TREE_CODE (from) == OFFSET_TYPE
&& comptypes (TYPE_OFFSET_BASETYPE (to),
- TYPE_OFFSET_BASETYPE (from),
+ TYPE_OFFSET_BASETYPE (from),
COMPARE_BASE | COMPARE_DERIVED))
continue;
+ if (TREE_CODE (to) == VECTOR_TYPE
+ && vector_types_convertible_p (to, from))
+ return 1;
+
if (TREE_CODE (to) == INTEGER_TYPE
&& TYPE_PRECISION (to) == TYPE_PRECISION (from))
return 1;
if (TREE_CODE (to) != POINTER_TYPE)
return comptypes
- (TYPE_MAIN_VARIANT (to), TYPE_MAIN_VARIANT (from),
+ (TYPE_MAIN_VARIANT (to), TYPE_MAIN_VARIANT (from),
COMPARE_BASE | COMPARE_DERIVED);
}
}
return CLASS_TYPE_P (type) && CLASSTYPE_HAS_MUTABLE (type);
}
+/* Apply the TYPE_QUALS to the new DECL. */
+void
+cp_apply_type_quals_to_decl (int type_quals, tree decl)
+{
+ tree type = TREE_TYPE (decl);
+
+ if (type == error_mark_node)
+ return;
+
+ if (TREE_CODE (type) == FUNCTION_TYPE
+ && type_quals != TYPE_UNQUALIFIED)
+ {
+ /* This was an error in C++98 (cv-qualifiers cannot be added to
+ a function type), but DR 295 makes the code well-formed by
+ dropping the extra qualifiers. */
+ if (pedantic)
+ {
+ tree bad_type = build_qualified_type (type, type_quals);
+ pedwarn ("ignoring %qV qualifiers added to function type %qT",
+ bad_type, type);
+ }
+
+ TREE_TYPE (decl) = TYPE_MAIN_VARIANT (type);
+ return;
+ }
+
+ /* Avoid setting TREE_READONLY incorrectly. */
+ if (/* If the object has a constructor, the constructor may modify
+ the object. */
+ TYPE_NEEDS_CONSTRUCTING (type)
+ /* If the type isn't complete, we don't know yet if it will need
+ constructing. */
+ || !COMPLETE_TYPE_P (type)
+ /* If the type has a mutable component, that component might be
+ modified. */
+ || TYPE_HAS_MUTABLE_P (type))
+ type_quals &= ~TYPE_QUAL_CONST;
+
+ c_apply_type_quals_to_decl (type_quals, decl);
+}
+
/* Subroutine of casts_away_constness. Make T1 and T2 point at
- exemplar types such that casting T1 to T2 is casting away castness
+ exemplar types such that casting T1 to T2 is casting away constness
if and only if there is no implicit conversion from T1 to T2. */
static void
and pointers to members (conv.qual), the "member" aspect of a
pointer to member level is ignored when determining if a const
cv-qualifier has been cast away. */
- if (TYPE_PTRMEM_P (*t1))
- *t1 = build_pointer_type (TYPE_PTRMEM_POINTED_TO_TYPE (*t1));
- if (TYPE_PTRMEM_P (*t2))
- *t2 = build_pointer_type (TYPE_PTRMEM_POINTED_TO_TYPE (*t2));
-
/* [expr.const.cast]
For two pointer types:
- X1 is T1cv1,1 * ... cv1,N * where T1 is not a pointer type
- X2 is T2cv2,1 * ... cv2,M * where T2 is not a pointer type
- K is min(N,M)
+ X1 is T1cv1,1 * ... cv1,N * where T1 is not a pointer type
+ X2 is T2cv2,1 * ... cv2,M * where T2 is not a pointer type
+ K is min(N,M)
casting from X1 to X2 casts away constness if, for a non-pointer
type T there does not exist an implicit conversion (clause
_conv_) from:
- Tcv1,(N-K+1) * cv1,(N-K+2) * ... cv1,N *
-
- to
+ Tcv1,(N-K+1) * cv1,(N-K+2) * ... cv1,N *
- Tcv2,(M-K+1) * cv2,(M-K+2) * ... cv2,M *. */
+ to
- if (TREE_CODE (*t1) != POINTER_TYPE
- || TREE_CODE (*t2) != POINTER_TYPE)
+ Tcv2,(M-K+1) * cv2,(M-K+2) * ... cv2,M *. */
+ if ((!TYPE_PTR_P (*t1) && !TYPE_PTRMEM_P (*t1))
+ || (!TYPE_PTR_P (*t2) && !TYPE_PTRMEM_P (*t2)))
{
*t1 = cp_build_qualified_type (void_type_node,
cp_type_quals (*t1));
cp_type_quals (*t2));
return;
}
-
+
quals1 = cp_type_quals (*t1);
quals2 = cp_type_quals (*t2);
- *t1 = TREE_TYPE (*t1);
- *t2 = TREE_TYPE (*t2);
+
+ if (TYPE_PTRMEM_P (*t1))
+ *t1 = TYPE_PTRMEM_POINTED_TO_TYPE (*t1);
+ else
+ *t1 = TREE_TYPE (*t1);
+ if (TYPE_PTRMEM_P (*t2))
+ *t2 = TYPE_PTRMEM_POINTED_TO_TYPE (*t2);
+ else
+ *t2 = TREE_TYPE (*t2);
+
casts_away_constness_r (t1, t2);
*t1 = build_pointer_type (*t1);
*t2 = build_pointer_type (*t2);
if (TREE_CODE (t2) == REFERENCE_TYPE)
{
/* [expr.const.cast]
-
+
Casting from an lvalue of type T1 to an lvalue of type T2
using a reference cast casts away constness if a cast from an
rvalue of type "pointer to T1" to the type "pointer to T2"
if (TYPE_PTRMEM_P (t1) && TYPE_PTRMEM_P (t2))
/* [expr.const.cast]
-
+
Casting from an rvalue of type "pointer to data member of X
of type T1" to the type "pointer to data member of Y of type
T2" casts away constness if a cast from an rvalue of type
/* Casting away constness is only something that makes sense for
pointer or reference types. */
- if (TREE_CODE (t1) != POINTER_TYPE
+ if (TREE_CODE (t1) != POINTER_TYPE
|| TREE_CODE (t2) != POINTER_TYPE)
return false;
t = TREE_TYPE (t);
return t;
}
+
+
+/* Return nonzero if REF is an lvalue valid for this language;
+ otherwise, print an error message and return zero. USE says
+ how the lvalue is being used and so selects the error message. */
+
+int
+lvalue_or_else (tree ref, enum lvalue_use use)
+{
+ int win = lvalue_p (ref);
+
+ if (!win)
+ lvalue_error (use);
+
+ return win;
+}
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