#include "target.h"
#include "convert.h"
+/* The various kinds of conversion. */
+
+typedef enum conversion_kind {
+ ck_identity,
+ ck_lvalue,
+ ck_qual,
+ ck_std,
+ ck_ptr,
+ ck_pmem,
+ ck_base,
+ ck_ref_bind,
+ ck_user,
+ ck_ambig,
+ ck_rvalue
+} conversion_kind;
+
+/* The rank of the conversion. Order of the enumerals matters; better
+ conversions should come earlier in the list. */
+
+typedef enum conversion_rank {
+ cr_identity,
+ cr_exact,
+ cr_promotion,
+ cr_std,
+ cr_pbool,
+ cr_user,
+ cr_ellipsis,
+ cr_bad
+} conversion_rank;
+
+/* An implicit conversion sequence, in the sense of [over.best.ics].
+ The first conversion to be performed is at the end of the chain.
+ That conversion is always an cr_identity conversion. */
+
+typedef struct conversion conversion;
+struct conversion {
+ /* The kind of conversion represented by this step. */
+ conversion_kind kind;
+ /* The rank of this conversion. */
+ conversion_rank rank;
+ BOOL_BITFIELD user_conv_p : 1;
+ BOOL_BITFIELD ellipsis_p : 1;
+ BOOL_BITFIELD this_p : 1;
+ BOOL_BITFIELD bad_p : 1;
+ /* If KIND is ck_ref_bind ck_base_conv, true to indicate that a
+ temporary should be created to hold the result of the
+ conversion. */
+ BOOL_BITFIELD need_temporary_p : 1;
+ /* If KIND is ck_identity or ck_base_conv, true to indicate that the
+ copy constructor must be accessible, even though it is not being
+ used. */
+ BOOL_BITFIELD check_copy_constructor_p : 1;
+ /* The type of the expression resulting from the conversion. */
+ tree type;
+ union {
+ /* The next conversion in the chain. Since the conversions are
+ arranged from outermost to innermost, the NEXT conversion will
+ actually be performed before this conversion. This variant is
+ used only when KIND is neither ck_identity nor ck_ambig. */
+ conversion *next;
+ /* The expression at the beginning of the conversion chain. This
+ variant is used only if KIND is ck_identity or ck_ambig. */
+ tree expr;
+ } u;
+ /* The function candidate corresponding to this conversion
+ sequence. This field is only used if KIND is ck_user. */
+ struct z_candidate *cand;
+};
+
+#define CONVERSION_RANK(NODE) \
+ ((NODE)->bad_p ? cr_bad \
+ : (NODE)->ellipsis_p ? cr_ellipsis \
+ : (NODE)->user_conv_p ? cr_user \
+ : (NODE)->rank)
+
+static struct obstack conversion_obstack;
+static bool conversion_obstack_initialized;
+
static struct z_candidate * tourney (struct z_candidate *);
static int equal_functions (tree, tree);
static int joust (struct z_candidate *, struct z_candidate *, bool);
-static int compare_ics (tree, tree);
+static int compare_ics (conversion *, conversion *);
static tree build_over_call (struct z_candidate *, int);
static tree build_java_interface_fn_ref (tree, tree);
#define convert_like(CONV, EXPR) \
#define convert_like_with_context(CONV, EXPR, FN, ARGNO) \
convert_like_real ((CONV), (EXPR), (FN), (ARGNO), 0, \
/*issue_conversion_warnings=*/true)
-static tree convert_like_real (tree, tree, tree, int, int, bool);
+static tree convert_like_real (conversion *, tree, tree, int, int, bool);
static void op_error (enum tree_code, enum tree_code, tree, tree,
tree, const char *);
static tree build_object_call (tree, tree);
(struct z_candidate **, tree, tree, tree, tree, tree);
static struct z_candidate *add_function_candidate
(struct z_candidate **, tree, tree, tree, tree, tree, int);
-static tree implicit_conversion (tree, tree, tree, int);
-static tree standard_conversion (tree, tree, tree);
-static tree reference_binding (tree, tree, tree, int);
-static tree build_conv (enum tree_code, tree, tree);
-static bool is_subseq (tree, tree);
-static tree maybe_handle_ref_bind (tree *);
-static void maybe_handle_implicit_object (tree *);
+static conversion *implicit_conversion (tree, tree, tree, int);
+static conversion *standard_conversion (tree, tree, tree);
+static conversion *reference_binding (tree, tree, tree, int);
+static conversion *build_conv (conversion_kind, tree, conversion *);
+static bool is_subseq (conversion *, conversion *);
+static tree maybe_handle_ref_bind (conversion **);
+static void maybe_handle_implicit_object (conversion **);
static struct z_candidate *add_candidate
- (struct z_candidate **, tree, tree, tree, tree, tree, int);
-static tree source_type (tree);
+ (struct z_candidate **, tree, tree, size_t,
+ conversion **, tree, tree, int);
+static tree source_type (conversion *);
static void add_warning (struct z_candidate *, struct z_candidate *);
static bool reference_related_p (tree, tree);
static bool reference_compatible_p (tree, tree);
-static tree convert_class_to_reference (tree, tree, tree);
-static tree direct_reference_binding (tree, tree);
+static conversion *convert_class_to_reference (tree, tree, tree);
+static conversion *direct_reference_binding (tree, conversion *);
static bool promoted_arithmetic_type_p (tree);
-static tree conditional_conversion (tree, tree);
+static conversion *conditional_conversion (tree, tree);
static char *name_as_c_string (tree, tree, bool *);
static tree call_builtin_trap (tree);
static tree prep_operand (tree);
static void add_candidates (tree, tree, tree, bool, tree, tree,
int, struct z_candidate **);
-static tree merge_conversion_sequences (tree, tree);
+static conversion *merge_conversion_sequences (conversion *, conversion *);
static bool magic_varargs_p (tree);
tree
/* New overloading code. */
-struct z_candidate GTY(()) {
+typedef struct z_candidate z_candidate;
+
+typedef struct candidate_warning candidate_warning;
+struct candidate_warning {
+ z_candidate *loser;
+ candidate_warning *next;
+};
+
+struct z_candidate {
/* The FUNCTION_DECL that will be called if this candidate is
selected by overload resolution. */
tree fn;
tree args;
/* The implicit conversion sequences for each of the arguments to
FN. */
- tree convs;
+ conversion **convs;
+ /* The number of implicit conversion sequences. */
+ size_t num_convs;
/* If FN is a user-defined conversion, the standard conversion
sequence from the type returned by FN to the desired destination
type. */
- tree second_conv;
+ conversion *second_conv;
int viable;
/* If FN is a member function, the binfo indicating the path used to
qualify the name of FN at the call site. This path is used to
indicated by the CONVERSION_PATH. */
tree conversion_path;
tree template;
- tree warnings;
- struct z_candidate *next;
+ candidate_warning *warnings;
+ z_candidate *next;
};
-#define IDENTITY_RANK 0
-#define EXACT_RANK 1
-#define PROMO_RANK 2
-#define STD_RANK 3
-#define PBOOL_RANK 4
-#define USER_RANK 5
-#define ELLIPSIS_RANK 6
-#define BAD_RANK 7
-
-#define ICS_RANK(NODE) \
- (ICS_BAD_FLAG (NODE) ? BAD_RANK \
- : ICS_ELLIPSIS_FLAG (NODE) ? ELLIPSIS_RANK \
- : ICS_USER_FLAG (NODE) ? USER_RANK \
- : ICS_STD_RANK (NODE))
-
-#define ICS_STD_RANK(NODE) TREE_COMPLEXITY (NODE)
-
-#define ICS_USER_FLAG(NODE) TREE_LANG_FLAG_0 (NODE)
-#define ICS_ELLIPSIS_FLAG(NODE) TREE_LANG_FLAG_1 (NODE)
-#define ICS_THIS_FLAG(NODE) TREE_LANG_FLAG_2 (NODE)
-#define ICS_BAD_FLAG(NODE) TREE_LANG_FLAG_3 (NODE)
-
-/* In a REF_BIND or a BASE_CONV, this indicates that a temporary
- should be created to hold the result of the conversion. */
-#define NEED_TEMPORARY_P(NODE) TREE_LANG_FLAG_4 (NODE)
-
-/* TRUE in an IDENTITY_CONV or BASE_CONV if the copy constructor must
- be accessible, even though it is not being used. */
-#define CHECK_COPY_CONSTRUCTOR_P(NODE) TREE_LANG_FLAG_5 (NODE)
-
-#define USER_CONV_CAND(NODE) WRAPPER_ZC (TREE_OPERAND (NODE, 1))
-#define USER_CONV_FN(NODE) (USER_CONV_CAND (NODE)->fn)
-
bool
null_ptr_cst_p (tree t)
{
return true;
}
-static tree
-build_conv (enum tree_code code, tree type, tree from)
+/* Allocate N bytes of memory from the conversion obstack. The memory
+ is zeroed before being returned. */
+
+static void *
+conversion_obstack_alloc (size_t n)
{
- tree t;
- int rank = ICS_STD_RANK (from);
+ void *p;
+ if (!conversion_obstack_initialized)
+ {
+ gcc_obstack_init (&conversion_obstack);
+ conversion_obstack_initialized = true;
+ }
+ p = obstack_alloc (&conversion_obstack, n);
+ memset (p, 0, n);
+ return p;
+}
+
+/* Dynamically allocate a conversion. */
+
+static conversion *
+alloc_conversion (conversion_kind kind)
+{
+ conversion *c;
+ c = conversion_obstack_alloc (sizeof (conversion));
+ c->kind = kind;
+ return c;
+}
+
+#ifdef ENABLE_CHECKING
+
+/* Make sure that all memory on the conversion obstack has been
+ freed. */
+
+void
+validate_conversion_obstack (void)
+{
+ if (conversion_obstack_initialized)
+ my_friendly_assert ((obstack_next_free (&conversion_obstack)
+ == obstack_base (&conversion_obstack)),
+ 20040208);
+}
+
+#endif /* ENABLE_CHECKING */
+
+/* Dynamically allocate an array of N conversions. */
+
+static conversion **
+alloc_conversions (size_t n)
+{
+ return conversion_obstack_alloc (n * sizeof (conversion *));
+}
+
+static conversion *
+build_conv (conversion_kind code, tree type, conversion *from)
+{
+ conversion *t;
+ conversion_rank rank = CONVERSION_RANK (from);
/* We can't use buildl1 here because CODE could be USER_CONV, which
takes two arguments. In that case, the caller is responsible for
filling in the second argument. */
- t = make_node (code);
- TREE_TYPE (t) = type;
- TREE_OPERAND (t, 0) = from;
+ t = alloc_conversion (code);
+ t->type = type;
+ t->u.next = from;
switch (code)
{
- case PTR_CONV:
- case PMEM_CONV:
- case BASE_CONV:
- case STD_CONV:
- if (rank < STD_RANK)
- rank = STD_RANK;
+ case ck_ptr:
+ case ck_pmem:
+ case ck_base:
+ case ck_std:
+ if (rank < cr_std)
+ rank = cr_std;
break;
- case QUAL_CONV:
- if (rank < EXACT_RANK)
- rank = EXACT_RANK;
+ case ck_qual:
+ if (rank < cr_exact)
+ rank = cr_exact;
+ break;
default:
break;
}
- ICS_STD_RANK (t) = rank;
- ICS_USER_FLAG (t) = (code == USER_CONV || ICS_USER_FLAG (from));
- ICS_BAD_FLAG (t) = ICS_BAD_FLAG (from);
+ t->rank = rank;
+ t->user_conv_p = (code == ck_user || from->user_conv_p);
+ t->bad_p = from->bad_p;
return t;
}
+/* Build a representation of the identity conversion from EXPR to
+ itself. The TYPE should match the the type of EXPR, if EXPR is
+ non-NULL. */
+
+static conversion *
+build_identity_conv (tree type, tree expr)
+{
+ conversion *c;
+
+ c = alloc_conversion (ck_identity);
+ c->type = type;
+ c->u.expr = expr;
+
+ return c;
+}
+
+/* Converting from EXPR to TYPE was ambiguous in the sense that there
+ were multiple user-defined conversions to accomplish the job.
+ Build a conversion that indicates that ambiguity. */
+
+static conversion *
+build_ambiguous_conv (tree type, tree expr)
+{
+ conversion *c;
+
+ c = alloc_conversion (ck_ambig);
+ c->type = type;
+ c->u.expr = expr;
+
+ return c;
+}
+
tree
strip_top_quals (tree t)
{
TO, if any. For proper handling of null pointer constants, you must
also pass the expression EXPR to convert from. */
-static tree
+static conversion *
standard_conversion (tree to, tree from, tree expr)
{
enum tree_code fcode, tcode;
- tree conv;
+ conversion *conv;
bool fromref = false;
to = non_reference (to);
{
expr = instantiate_type (to, expr, tf_conv);
if (expr == error_mark_node)
- return NULL_TREE;
+ return NULL;
from = TREE_TYPE (expr);
}
fcode = TREE_CODE (from);
tcode = TREE_CODE (to);
- conv = build1 (IDENTITY_CONV, from, expr);
-
+ conv = build_identity_conv (from, expr);
if (fcode == FUNCTION_TYPE)
{
from = build_pointer_type (from);
fcode = TREE_CODE (from);
- conv = build_conv (LVALUE_CONV, from, conv);
+ conv = build_conv (ck_lvalue, from, conv);
}
else if (fcode == ARRAY_TYPE)
{
from = build_pointer_type (TREE_TYPE (from));
fcode = TREE_CODE (from);
- conv = build_conv (LVALUE_CONV, from, conv);
+ conv = build_conv (ck_lvalue, from, conv);
}
else if (fromref || (expr && lvalue_p (expr)))
- conv = build_conv (RVALUE_CONV, from, conv);
+ conv = build_conv (ck_rvalue, from, conv);
/* Allow conversion between `__complex__' data types. */
if (tcode == COMPLEX_TYPE && fcode == COMPLEX_TYPE)
/* The standard conversion sequence to convert FROM to TO is
the standard conversion sequence to perform componentwise
conversion. */
- tree part_conv = standard_conversion
+ conversion *part_conv = standard_conversion
(TREE_TYPE (to), TREE_TYPE (from), NULL_TREE);
if (part_conv)
{
- conv = build_conv (TREE_CODE (part_conv), to, conv);
- ICS_STD_RANK (conv) = ICS_STD_RANK (part_conv);
+ conv = build_conv (part_conv->kind, to, conv);
+ conv->rank = part_conv->rank;
}
else
- conv = NULL_TREE;
+ conv = NULL;
return conv;
}
if ((tcode == POINTER_TYPE || TYPE_PTR_TO_MEMBER_P (to))
&& expr && null_ptr_cst_p (expr))
- conv = build_conv (STD_CONV, to, conv);
+ conv = build_conv (ck_std, to, conv);
else if (tcode == POINTER_TYPE && fcode == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (to)) == VECTOR_TYPE
&& TREE_CODE (TREE_TYPE (from)) == VECTOR_TYPE
&& ((*targetm.vector_opaque_p) (TREE_TYPE (to))
|| (*targetm.vector_opaque_p) (TREE_TYPE (from))))
- conv = build_conv (STD_CONV, to, conv);
+ conv = build_conv (ck_std, to, conv);
else if ((tcode == INTEGER_TYPE && fcode == POINTER_TYPE)
|| (tcode == POINTER_TYPE && fcode == INTEGER_TYPE))
{
/* For backwards brain damage compatibility, allow interconversion of
pointers and integers with a pedwarn. */
- conv = build_conv (STD_CONV, to, conv);
- ICS_BAD_FLAG (conv) = 1;
+ conv = build_conv (ck_std, to, conv);
+ conv->bad_p = true;
}
else if (tcode == ENUMERAL_TYPE && fcode == INTEGER_TYPE)
{
/* For backwards brain damage compatibility, allow interconversion of
enums and integers with a pedwarn. */
- conv = build_conv (STD_CONV, to, conv);
- ICS_BAD_FLAG (conv) = 1;
+ conv = build_conv (ck_std, to, conv);
+ conv->bad_p = true;
}
else if ((tcode == POINTER_TYPE && fcode == POINTER_TYPE)
|| (TYPE_PTRMEM_P (to) && TYPE_PTRMEM_P (from)))
from = build_pointer_type
(cp_build_qualified_type (void_type_node,
cp_type_quals (TREE_TYPE (from))));
- conv = build_conv (PTR_CONV, from, conv);
+ conv = build_conv (ck_ptr, from, conv);
}
else if (TYPE_PTRMEM_P (from))
{
{
from = build_ptrmem_type (tbase,
TYPE_PTRMEM_POINTED_TO_TYPE (from));
- conv = build_conv (PMEM_CONV, from, conv);
+ conv = build_conv (ck_pmem, from, conv);
}
}
else if (IS_AGGR_TYPE (TREE_TYPE (from))
cp_build_qualified_type (TREE_TYPE (to),
cp_type_quals (TREE_TYPE (from)));
from = build_pointer_type (from);
- conv = build_conv (PTR_CONV, from, conv);
+ conv = build_conv (ck_ptr, from, conv);
}
if (tcode == POINTER_TYPE)
if (same_type_p (from, to))
/* OK */;
else if (comp_ptr_ttypes (to_pointee, from_pointee))
- conv = build_conv (QUAL_CONV, to, conv);
+ conv = build_conv (ck_qual, to, conv);
else if (expr && string_conv_p (to, expr, 0))
/* converting from string constant to char *. */
- conv = build_conv (QUAL_CONV, to, conv);
+ conv = build_conv (ck_qual, to, conv);
else if (ptr_reasonably_similar (to_pointee, from_pointee))
{
- conv = build_conv (PTR_CONV, to, conv);
- ICS_BAD_FLAG (conv) = 1;
+ conv = build_conv (ck_ptr, to, conv);
+ conv->bad_p = true;
}
else
- return 0;
+ return NULL;
from = to;
}
TREE_TYPE (fromfn),
TREE_CHAIN (TYPE_ARG_TYPES (fromfn)));
from = build_ptrmemfunc_type (build_pointer_type (from));
- conv = build_conv (PMEM_CONV, from, conv);
+ conv = build_conv (ck_pmem, from, conv);
}
else if (tcode == BOOLEAN_TYPE)
{
|| fcode == POINTER_TYPE
|| TYPE_PTR_TO_MEMBER_P (from))
{
- conv = build_conv (STD_CONV, to, conv);
+ conv = build_conv (ck_std, to, conv);
if (fcode == POINTER_TYPE
|| TYPE_PTRMEM_P (from)
|| (TYPE_PTRMEMFUNC_P (from)
- && ICS_STD_RANK (conv) < PBOOL_RANK))
- ICS_STD_RANK (conv) = PBOOL_RANK;
+ && conv->rank < cr_pbool))
+ conv->rank = cr_pbool;
return conv;
}
- return NULL_TREE;
+ return NULL;
}
/* We don't check for ENUMERAL_TYPE here because there are no standard
conversions to enum type. */
{
if (! (INTEGRAL_CODE_P (fcode) || fcode == REAL_TYPE))
return 0;
- conv = build_conv (STD_CONV, to, conv);
+ conv = build_conv (ck_std, to, conv);
/* Give this a better rank if it's a promotion. */
if (same_type_p (to, type_promotes_to (from))
- && ICS_STD_RANK (TREE_OPERAND (conv, 0)) <= PROMO_RANK)
- ICS_STD_RANK (conv) = PROMO_RANK;
+ && conv->u.next->rank <= cr_promotion)
+ conv->rank = cr_promotion;
}
else if (fcode == VECTOR_TYPE && tcode == VECTOR_TYPE
&& ((*targetm.vector_opaque_p) (from)
|| (*targetm.vector_opaque_p) (to)))
- return build_conv (STD_CONV, to, conv);
+ return build_conv (ck_std, to, conv);
else if (IS_AGGR_TYPE (to) && IS_AGGR_TYPE (from)
&& is_properly_derived_from (from, to))
{
- if (TREE_CODE (conv) == RVALUE_CONV)
- conv = TREE_OPERAND (conv, 0);
- conv = build_conv (BASE_CONV, to, conv);
+ if (conv->kind == ck_rvalue)
+ conv = conv->u.next;
+ conv = build_conv (ck_base, to, conv);
/* The derived-to-base conversion indicates the initialization
of a parameter with base type from an object of a derived
type. A temporary object is created to hold the result of
the conversion. */
- NEED_TEMPORARY_P (conv) = 1;
+ conv->need_temporary_p = true;
}
else
- return 0;
+ return NULL;
return conv;
}
/* Determine whether or not the EXPR (of class type S) can be
converted to T as in [over.match.ref]. */
-static tree
+static conversion *
convert_class_to_reference (tree t, tree s, tree expr)
{
tree conversions;
tree arglist;
- tree conv;
+ conversion *conv;
tree reference_type;
struct z_candidate *candidates;
struct z_candidate *cand;
conversions = lookup_conversions (s);
if (!conversions)
- return NULL_TREE;
+ return NULL;
/* [over.match.ref]
if (cand)
{
+ conversion *identity_conv;
/* Build a standard conversion sequence indicating the
binding from the reference type returned by the
function to the desired REFERENCE_TYPE. */
+ identity_conv
+ = build_identity_conv (TREE_TYPE (TREE_TYPE
+ (TREE_TYPE (cand->fn))),
+ NULL_TREE);
cand->second_conv
= (direct_reference_binding
- (reference_type,
- build1 (IDENTITY_CONV,
- TREE_TYPE (TREE_TYPE (TREE_TYPE (cand->fn))),
- NULL_TREE)));
- ICS_BAD_FLAG (cand->second_conv)
- |= ICS_BAD_FLAG (TREE_VEC_ELT (cand->convs, 0));
+ (reference_type, identity_conv));
+ cand->second_conv->bad_p |= cand->convs[0]->bad_p;
}
}
conversions = TREE_CHAIN (conversions);
/* If none of the conversion functions worked out, let our caller
know. */
if (!any_viable_p)
- return NULL_TREE;
+ return NULL;
cand = tourney (candidates);
if (!cand)
- return NULL_TREE;
+ return NULL;
/* Now that we know that this is the function we're going to use fix
the dummy first argument. */
/* Build a user-defined conversion sequence representing the
conversion. */
- conv = build_conv (USER_CONV,
+ conv = build_conv (ck_user,
TREE_TYPE (TREE_TYPE (cand->fn)),
- build1 (IDENTITY_CONV, TREE_TYPE (expr), expr));
- TREE_OPERAND (conv, 1) = build_zc_wrapper (cand);
+ build_identity_conv (TREE_TYPE (expr), expr));
+ conv->cand = cand;
/* Merge it with the standard conversion sequence from the
conversion function's return type to the desired type. */
cand->second_conv = merge_conversion_sequences (conv, cand->second_conv);
if (cand->viable == -1)
- ICS_BAD_FLAG (conv) = 1;
+ conv->bad_p = true;
return cand->second_conv;
}
expression represented by the implicit conversion sequence CONV.
Return a conversion sequence for this binding. */
-static tree
-direct_reference_binding (tree type, tree conv)
+static conversion *
+direct_reference_binding (tree type, conversion *conv)
{
tree t;
my_friendly_assert (TREE_CODE (type) == REFERENCE_TYPE, 20030306);
- my_friendly_assert (TREE_CODE (TREE_TYPE (conv)) != REFERENCE_TYPE,
- 20030306);
+ my_friendly_assert (TREE_CODE (conv->type) != REFERENCE_TYPE, 20030306);
t = TREE_TYPE (type);
either an identity conversion or, if the conversion function
returns an entity of a type that is a derived class of the
parameter type, a derived-to-base conversion. */
- if (!same_type_ignoring_top_level_qualifiers_p (t, TREE_TYPE (conv)))
+ if (!same_type_ignoring_top_level_qualifiers_p (t, conv->type))
{
/* Represent the derived-to-base conversion. */
- conv = build_conv (BASE_CONV, t, conv);
+ conv = build_conv (ck_base, t, conv);
/* We will actually be binding to the base-class subobject in
the derived class, so we mark this conversion appropriately.
That way, convert_like knows not to generate a temporary. */
- NEED_TEMPORARY_P (conv) = 0;
+ conv->need_temporary_p = false;
}
- return build_conv (REF_BIND, type, conv);
+ return build_conv (ck_ref_bind, type, conv);
}
/* Returns the conversion path from type FROM to reference type TO for
reference will be bound to a temporary, NEED_TEMPORARY_P is set for
the conversion returned. */
-static tree
+static conversion *
reference_binding (tree rto, tree rfrom, tree expr, int flags)
{
- tree conv = NULL_TREE;
+ conversion *conv = NULL;
tree to = TREE_TYPE (rto);
tree from = rfrom;
bool related_p;
{
expr = instantiate_type (to, expr, tf_none);
if (expr == error_mark_node)
- return NULL_TREE;
+ return NULL;
from = TREE_TYPE (expr);
}
the reference is bound directly to the initializer expression
lvalue. */
- conv = build1 (IDENTITY_CONV, from, expr);
+ conv = build_identity_conv (from, expr);
conv = direct_reference_binding (rto, conv);
if ((lvalue_p & clk_bitfield) != 0
|| ((lvalue_p & clk_packed) != 0 && !TYPE_PACKED (to)))
reference is volatile, or isn't const, then we cannot make
a temporary, so we just issue an error when the conversion
actually occurs. */
- NEED_TEMPORARY_P (conv) = 1;
+ conv->need_temporary_p = true;
return conv;
}
/* From this point on, we conceptually need temporaries, even if we
elide them. Only the cases above are "direct bindings". */
if (flags & LOOKUP_NO_TEMP_BIND)
- return NULL_TREE;
+ return NULL;
/* [over.ics.rank]
Otherwise, the reference shall be to a non-volatile const type. */
if (!CP_TYPE_CONST_NON_VOLATILE_P (to))
- return NULL_TREE;
+ return NULL;
/* [dcl.init.ref]
conversion, just as for direct binding. */
if (CLASS_TYPE_P (from) && compatible_p)
{
- conv = build1 (IDENTITY_CONV, from, expr);
+ conv = build_identity_conv (from, expr);
conv = direct_reference_binding (rto, conv);
- CHECK_COPY_CONSTRUCTOR_P (TREE_OPERAND (conv, 0)) = 1;
+ conv->u.next->check_copy_constructor_p = true;
return conv;
}
T2, cv1 must be the same cv-qualification as, or greater
cv-qualification than, cv2; otherwise, the program is ill-formed. */
if (related_p && !at_least_as_qualified_p (to, from))
- return NULL_TREE;
+ return NULL;
conv = implicit_conversion (to, from, expr, flags);
if (!conv)
- return NULL_TREE;
+ return NULL;
- conv = build_conv (REF_BIND, rto, conv);
+ conv = build_conv (ck_ref_bind, rto, conv);
/* This reference binding, unlike those above, requires the
creation of a temporary. */
- NEED_TEMPORARY_P (conv) = 1;
+ conv->need_temporary_p = true;
return conv;
}
FLAGS are the usual overloading flags. Only LOOKUP_NO_CONVERSION is
significant. */
-static tree
+static conversion *
implicit_conversion (tree to, tree from, tree expr, int flags)
{
- tree conv;
+ conversion *conv;
if (from == error_mark_node || to == error_mark_node
|| expr == error_mark_node)
- return NULL_TREE;
+ return NULL;
if (TREE_CODE (to) == REFERENCE_TYPE)
conv = reference_binding (to, from, expr, flags);
return conv;
}
- return NULL_TREE;
+ return NULL;
}
/* Add a new entry to the list of candidates. Used by the add_*_candidate
static struct z_candidate *
add_candidate (struct z_candidate **candidates,
- tree fn, tree args, tree convs, tree access_path,
- tree conversion_path, int viable)
+ tree fn, tree args,
+ size_t num_convs, conversion **convs,
+ tree access_path, tree conversion_path,
+ int viable)
{
- struct z_candidate *cand = ggc_alloc_cleared (sizeof (struct z_candidate));
+ struct z_candidate *cand
+ = conversion_obstack_alloc (sizeof (struct z_candidate));
cand->fn = fn;
cand->args = args;
cand->convs = convs;
+ cand->num_convs = num_convs;
cand->access_path = access_path;
cand->conversion_path = conversion_path;
cand->viable = viable;
{
tree parmlist = TYPE_ARG_TYPES (TREE_TYPE (fn));
int i, len;
- tree convs;
+ conversion **convs;
tree parmnode, argnode;
tree orig_arglist;
int viable = 1;
orig_arglist = arglist;
len = list_length (arglist);
- convs = make_tree_vec (len);
+ convs = alloc_conversions (len);
/* 13.3.2 - Viable functions [over.match.viable]
First, to be a viable function, a candidate function shall have enough
{
tree arg = TREE_VALUE (argnode);
tree argtype = lvalue_type (arg);
- tree t;
+ conversion *t;
int is_this;
if (parmnode == void_list_node)
}
else
{
- t = build1 (IDENTITY_CONV, argtype, arg);
- ICS_ELLIPSIS_FLAG (t) = 1;
+ t = build_identity_conv (argtype, arg);
+ t->ellipsis_p = true;
}
if (t && is_this)
- ICS_THIS_FLAG (t) = 1;
+ t->this_p = true;
- TREE_VEC_ELT (convs, i) = t;
+ convs[i] = t;
if (! t)
{
viable = 0;
break;
}
- if (ICS_BAD_FLAG (t))
+ if (t->bad_p)
viable = -1;
if (parmnode)
}
out:
- return add_candidate (candidates, fn, orig_arglist, convs, access_path,
- conversion_path, viable);
+ return add_candidate (candidates, fn, orig_arglist, len, convs,
+ access_path, conversion_path, viable);
}
/* Create an overload candidate for the conversion function FN which will
{
tree totype = TREE_TYPE (TREE_TYPE (fn));
int i, len, viable, flags;
- tree parmlist, convs, parmnode, argnode;
+ tree parmlist, parmnode, argnode;
+ conversion **convs;
for (parmlist = totype; TREE_CODE (parmlist) != FUNCTION_TYPE; )
parmlist = TREE_TYPE (parmlist);
parmlist = TYPE_ARG_TYPES (parmlist);
len = list_length (arglist) + 1;
- convs = make_tree_vec (len);
+ convs = alloc_conversions (len);
parmnode = parmlist;
argnode = arglist;
viable = 1;
{
tree arg = i == 0 ? obj : TREE_VALUE (argnode);
tree argtype = lvalue_type (arg);
- tree t;
+ conversion *t;
if (i == 0)
t = implicit_conversion (totype, argtype, arg, flags);
t = implicit_conversion (TREE_VALUE (parmnode), argtype, arg, flags);
else
{
- t = build1 (IDENTITY_CONV, argtype, arg);
- ICS_ELLIPSIS_FLAG (t) = 1;
+ t = build_identity_conv (argtype, arg);
+ t->ellipsis_p = true;
}
- TREE_VEC_ELT (convs, i) = t;
+ convs[i] = t;
if (! t)
break;
- if (ICS_BAD_FLAG (t))
+ if (t->bad_p)
viable = -1;
if (i == 0)
if (!sufficient_parms_p (parmnode))
viable = 0;
- return add_candidate (candidates, totype, arglist, convs, access_path,
- conversion_path, viable);
+ return add_candidate (candidates, totype, arglist, len, convs,
+ access_path, conversion_path, viable);
}
static void
tree type1, tree type2, tree *args, tree *argtypes,
int flags)
{
- tree t, convs;
+ conversion *t;
+ conversion **convs;
+ size_t num_convs;
int viable = 1, i;
tree types[2];
types[0] = type1;
types[1] = type2;
- convs = make_tree_vec (args[2] ? 3 : (args[1] ? 2 : 1));
+ num_convs = args[2] ? 3 : (args[1] ? 2 : 1);
+ convs = alloc_conversions (num_convs);
for (i = 0; i < 2; ++i)
{
{
viable = 0;
/* We need something for printing the candidate. */
- t = build1 (IDENTITY_CONV, types[i], NULL_TREE);
+ t = build_identity_conv (types[i], NULL_TREE);
}
- else if (ICS_BAD_FLAG (t))
+ else if (t->bad_p)
viable = 0;
- TREE_VEC_ELT (convs, i) = t;
+ convs[i] = t;
}
/* For COND_EXPR we rearranged the arguments; undo that now. */
if (args[2])
{
- TREE_VEC_ELT (convs, 2) = TREE_VEC_ELT (convs, 1);
- TREE_VEC_ELT (convs, 1) = TREE_VEC_ELT (convs, 0);
+ convs[2] = convs[1];
+ convs[1] = convs[0];
t = implicit_conversion (boolean_type_node, argtypes[2], args[2], flags);
if (t)
- TREE_VEC_ELT (convs, 0) = t;
+ convs[0] = t;
else
viable = 0;
}
- add_candidate (candidates, fnname, /*args=*/NULL_TREE, convs,
+ add_candidate (candidates, fnname, /*args=*/NULL_TREE,
+ num_convs, convs,
/*access_path=*/NULL_TREE,
/*conversion_path=*/NULL_TREE,
viable);
{
if (TREE_CODE (candidate->fn) == IDENTIFIER_NODE)
{
- if (TREE_VEC_LENGTH (candidate->convs) == 3)
+ if (candidate->num_convs == 3)
inform ("%s %D(%T, %T, %T) <built-in>", msgstr, candidate->fn,
- TREE_TYPE (TREE_VEC_ELT (candidate->convs, 0)),
- TREE_TYPE (TREE_VEC_ELT (candidate->convs, 1)),
- TREE_TYPE (TREE_VEC_ELT (candidate->convs, 2)));
- else if (TREE_VEC_LENGTH (candidate->convs) == 2)
+ candidate->convs[0]->type,
+ candidate->convs[1]->type,
+ candidate->convs[2]->type);
+ else if (candidate->num_convs == 2)
inform ("%s %D(%T, %T) <built-in>", msgstr, candidate->fn,
- TREE_TYPE (TREE_VEC_ELT (candidate->convs, 0)),
- TREE_TYPE (TREE_VEC_ELT (candidate->convs, 1)));
+ candidate->convs[0]->type,
+ candidate->convs[1]->type);
else
inform ("%s %D(%T) <built-in>", msgstr, candidate->fn,
- TREE_TYPE (TREE_VEC_ELT (candidate->convs, 0)));
+ candidate->convs[0]->type);
}
else if (TYPE_P (candidate->fn))
inform ("%s %T <conversion>", msgstr, candidate->fn);
desired type. Merge the the two sequences into a single sequence,
and return the merged sequence. */
-static tree
-merge_conversion_sequences (tree user_seq, tree std_seq)
+static conversion *
+merge_conversion_sequences (conversion *user_seq, conversion *std_seq)
{
- tree *t;
+ conversion **t;
- my_friendly_assert (TREE_CODE (user_seq) == USER_CONV,
- 20030306);
+ my_friendly_assert (user_seq->kind == ck_user, 20030306);
/* Find the end of the second conversion sequence. */
t = &(std_seq);
- while (TREE_CODE (*t) != IDENTITY_CONV)
- t = &TREE_OPERAND (*t, 0);
+ while ((*t)->kind != ck_identity)
+ t = &((*t)->u.next);
/* Replace the identity conversion with the user conversion
sequence. */
*t = user_seq;
/* The entire sequence is a user-conversion sequence. */
- ICS_USER_FLAG (std_seq) = 1;
+ std_seq->user_conv_p = true;
return std_seq;
}
{
struct z_candidate *candidates, *cand;
tree fromtype = TREE_TYPE (expr);
- tree ctors = NULL_TREE, convs = NULL_TREE;
+ tree ctors = NULL_TREE;
+ tree conv_fns = NULL_TREE;
+ conversion *conv = NULL;
tree args = NULL_TREE;
bool any_viable_p;
0);
if (IS_AGGR_TYPE (fromtype))
- convs = lookup_conversions (fromtype);
+ conv_fns = lookup_conversions (fromtype);
candidates = 0;
flags |= LOOKUP_NO_CONVERSION;
flags);
if (cand)
- cand->second_conv = build1 (IDENTITY_CONV, totype, NULL_TREE);
+ cand->second_conv = build_identity_conv (totype, NULL_TREE);
}
- if (convs)
+ if (conv_fns)
args = build_tree_list (NULL_TREE, build_this (expr));
- for (; convs; convs = TREE_CHAIN (convs))
+ for (; conv_fns; conv_fns = TREE_CHAIN (conv_fns))
{
tree fns;
- tree conversion_path = TREE_PURPOSE (convs);
+ tree conversion_path = TREE_PURPOSE (conv_fns);
int convflags = LOOKUP_NO_CONVERSION;
/* If we are called to convert to a reference type, we are trying to
if (TREE_CODE (totype) == REFERENCE_TYPE)
convflags |= LOOKUP_NO_TEMP_BIND;
- for (fns = TREE_VALUE (convs); fns; fns = OVL_NEXT (fns))
+ for (fns = TREE_VALUE (conv_fns); fns; fns = OVL_NEXT (fns))
{
tree fn = OVL_CURRENT (fns);
if (cand)
{
- tree ics = implicit_conversion (totype,
- TREE_TYPE (TREE_TYPE (cand->fn)),
- 0, convflags);
+ conversion *ics
+ = implicit_conversion (totype,
+ TREE_TYPE (TREE_TYPE (cand->fn)),
+ 0, convflags);
cand->second_conv = ics;
- if (ics == NULL_TREE)
+ if (!ics)
cand->viable = 0;
- else if (candidates->viable == 1 && ICS_BAD_FLAG (ics))
+ else if (candidates->viable == 1 && ics->bad_p)
cand->viable = -1;
}
}
}
cand = candidates; /* any one will do */
- cand->second_conv = build1 (AMBIG_CONV, totype, expr);
- ICS_USER_FLAG (cand->second_conv) = 1;
+ cand->second_conv = build_ambiguous_conv (totype, expr);
+ cand->second_conv->user_conv_p = true;
if (!any_strictly_viable (candidates))
- ICS_BAD_FLAG (cand->second_conv) = 1;
+ cand->second_conv->bad_p = true;
/* If there are viable candidates, don't set ICS_BAD_FLAG; an
ambiguous conversion is no worse than another user-defined
conversion. */
}
/* Build the user conversion sequence. */
- convs = build_conv
- (USER_CONV,
+ conv = build_conv
+ (ck_user,
(DECL_CONSTRUCTOR_P (cand->fn)
? totype : non_reference (TREE_TYPE (TREE_TYPE (cand->fn)))),
- build1 (IDENTITY_CONV, TREE_TYPE (expr), expr));
- TREE_OPERAND (convs, 1) = build_zc_wrapper (cand);
+ build_identity_conv (TREE_TYPE (expr), expr));
+ conv->cand = cand;
/* Combine it with the second conversion sequence. */
- cand->second_conv = merge_conversion_sequences (convs,
+ cand->second_conv = merge_conversion_sequences (conv,
cand->second_conv);
if (cand->viable == -1)
- ICS_BAD_FLAG (cand->second_conv) = 1;
+ cand->second_conv->bad_p = true;
return cand;
}
if (cand)
{
- if (TREE_CODE (cand->second_conv) == AMBIG_CONV)
+ if (cand->second_conv->kind == ck_ambig)
return error_mark_node;
return convert_from_reference (convert_like (cand->second_conv, expr));
}
{
struct z_candidate *candidates, *cand;
bool any_viable_p;
+ void *p;
+ tree result;
args = resolve_args (args);
if (args == error_mark_node)
return error_mark_node;
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
cand = perform_overload_resolution (fn, args, &candidates, &any_viable_p);
if (!cand)
DECL_NAME (OVL_CURRENT (fn)), args);
if (candidates)
print_z_candidates (candidates);
- return error_mark_node;
+ result = error_mark_node;
}
+ else
+ result = build_over_call (cand, LOOKUP_NORMAL);
- return build_over_call (cand, LOOKUP_NORMAL);
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
+
+ return result;
}
/* Build a call to a global operator new. FNNAME is the name of the
tree fns, convs, mem_args = NULL_TREE;
tree type = TREE_TYPE (obj);
bool any_viable_p;
+ tree result = NULL_TREE;
+ void *p;
if (TYPE_PTRMEMFUNC_P (type))
{
if (args == error_mark_node)
return error_mark_node;
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
if (fns)
{
tree base = BINFO_TYPE (BASELINK_BINFO (fns));
{
error ("no match for call to `(%T) (%A)'", TREE_TYPE (obj), args);
print_z_candidates (candidates);
- return error_mark_node;
+ result = error_mark_node;
}
-
- cand = tourney (candidates);
- if (cand == 0)
+ else
{
- error ("call of `(%T) (%A)' is ambiguous", TREE_TYPE (obj), args);
- print_z_candidates (candidates);
- return error_mark_node;
+ cand = tourney (candidates);
+ if (cand == 0)
+ {
+ error ("call of `(%T) (%A)' is ambiguous", TREE_TYPE (obj), args);
+ print_z_candidates (candidates);
+ result = error_mark_node;
+ }
+ /* Since cand->fn will be a type, not a function, for a conversion
+ function, we must be careful not to unconditionally look at
+ DECL_NAME here. */
+ else if (TREE_CODE (cand->fn) == FUNCTION_DECL
+ && DECL_OVERLOADED_OPERATOR_P (cand->fn) == CALL_EXPR)
+ result = build_over_call (cand, LOOKUP_NORMAL);
+ else
+ {
+ obj = convert_like_with_context (cand->convs[0], obj, cand->fn, -1);
+ result = build_function_call (obj, args);
+ }
}
- /* Since cand->fn will be a type, not a function, for a conversion
- function, we must be careful not to unconditionally look at
- DECL_NAME here. */
- if (TREE_CODE (cand->fn) == FUNCTION_DECL
- && DECL_OVERLOADED_OPERATOR_P (cand->fn) == CALL_EXPR)
- return build_over_call (cand, LOOKUP_NORMAL);
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
- obj = convert_like_with_context
- (TREE_VEC_ELT (cand->convs, 0), obj, cand->fn, -1);
-
- /* FIXME */
- return build_function_call (obj, args);
+ return result;
}
static void
/* Return the implicit conversion sequence that could be used to
convert E1 to E2 in [expr.cond]. */
-static tree
+static conversion *
conditional_conversion (tree e1, tree e2)
{
tree t1 = non_reference (TREE_TYPE (e1));
tree t2 = non_reference (TREE_TYPE (e2));
- tree conv;
+ conversion *conv;
bool good_base;
/* [expr.cond]
{
if (good_base && at_least_as_qualified_p (t2, t1))
{
- conv = build1 (IDENTITY_CONV, t1, e1);
+ conv = build_identity_conv (t1, e1);
if (!same_type_p (TYPE_MAIN_VARIANT (t1),
TYPE_MAIN_VARIANT (t2)))
{
- conv = build_conv (BASE_CONV, t2, conv);
- NEED_TEMPORARY_P (conv) = 1;
+ conv = build_conv (ck_base, t2, conv);
+ conv->need_temporary_p = true;
}
else
- conv = build_conv (RVALUE_CONV, t2, conv);
+ conv = build_conv (ck_rvalue, t2, conv);
return conv;
}
else
- return NULL_TREE;
+ return NULL;
}
else
/* [expr.cond]
{
tree arg2_type;
tree arg3_type;
- tree result;
+ tree result = NULL_TREE;
tree result_type = NULL_TREE;
bool lvalue_p = true;
struct z_candidate *candidates = 0;
struct z_candidate *cand;
+ void *p;
/* As a G++ extension, the second argument to the conditional can be
omitted. (So that `a ? : c' is roughly equivalent to `a ? a :
else if (!same_type_p (arg2_type, arg3_type)
&& (CLASS_TYPE_P (arg2_type) || CLASS_TYPE_P (arg3_type)))
{
- tree conv2 = conditional_conversion (arg2, arg3);
- tree conv3 = conditional_conversion (arg3, arg2);
+ conversion *conv2;
+ conversion *conv3;
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
+ conv2 = conditional_conversion (arg2, arg3);
+ conv3 = conditional_conversion (arg3, arg2);
+
/* [expr.cond]
If both can be converted, or one can be converted but the
one conversion is possible, that conversion is applied to the
chosen operand and the converted operand is used in place of
the original operand for the remainder of this section. */
- if ((conv2 && !ICS_BAD_FLAG (conv2)
- && conv3 && !ICS_BAD_FLAG (conv3))
- || (conv2 && TREE_CODE (conv2) == AMBIG_CONV)
- || (conv3 && TREE_CODE (conv3) == AMBIG_CONV))
+ if ((conv2 && !conv2->bad_p
+ && conv3 && !conv3->bad_p)
+ || (conv2 && conv2->kind == ck_ambig)
+ || (conv3 && conv3->kind == ck_ambig))
{
error ("operands to ?: have different types");
- return error_mark_node;
+ result = error_mark_node;
}
- else if (conv2 && !ICS_BAD_FLAG (conv2))
+ else if (conv2 && !conv2->bad_p)
{
arg2 = convert_like (conv2, arg2);
arg2 = convert_from_reference (arg2);
abort ();
arg2_type = TREE_TYPE (arg2);
}
- else if (conv3 && !ICS_BAD_FLAG (conv3))
+ else if (conv3 && !conv3->bad_p)
{
arg3 = convert_like (conv3, arg3);
arg3 = convert_from_reference (arg3);
abort ();
arg3_type = TREE_TYPE (arg3);
}
+
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
+
+ if (result)
+ return result;
}
/* [expr.cond]
&& (CLASS_TYPE_P (arg2_type) || CLASS_TYPE_P (arg3_type)))
{
tree args[3];
- tree conv;
+ conversion *conv;
bool any_viable_p;
/* Rearrange the arguments so that add_builtin_candidate only has
Otherwise, the conversions thus determined are applied, and
the converted operands are used in place of the original
operands for the remainder of this section. */
- conv = TREE_VEC_ELT (cand->convs, 0);
+ conv = cand->convs[0];
arg1 = convert_like (conv, arg1);
- conv = TREE_VEC_ELT (cand->convs, 1);
+ conv = cand->convs[1];
arg2 = convert_like (conv, arg2);
- conv = TREE_VEC_ELT (cand->convs, 2);
+ conv = cand->convs[2];
arg3 = convert_like (conv, arg3);
}
struct z_candidate *candidates = 0, *cand;
tree arglist, fnname;
tree args[3];
+ tree result = NULL_TREE;
+ bool result_valid_p = false;
enum tree_code code2 = NOP_EXPR;
- tree conv;
+ conversion *conv;
+ void *p;
bool strict_p;
bool any_viable_p;
arglist = tree_cons (NULL_TREE, arg2, arglist);
arglist = tree_cons (NULL_TREE, arg1, arglist);
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
/* Add namespace-scope operators to the list of functions to
consider. */
add_candidates (lookup_function_nonclass (fnname, arglist),
fns = lookup_fnfields (TYPE_BINFO (TREE_TYPE (arg1)), fnname, 1);
if (fns == error_mark_node)
- return fns;
+ {
+ result = error_mark_node;
+ goto user_defined_result_ready;
+ }
if (fns)
add_candidates (BASELINK_FUNCTIONS (fns), arglist,
NULL_TREE, false,
code = PREINCREMENT_EXPR;
else
code = PREDECREMENT_EXPR;
- return build_new_op (code, flags, arg1, NULL_TREE, NULL_TREE);
-
+ result = build_new_op (code, flags, arg1, NULL_TREE, NULL_TREE);
+ break;
+
/* The caller will deal with these. */
case ADDR_EXPR:
case COMPOUND_EXPR:
case COMPONENT_REF:
- return NULL_TREE;
+ result = NULL_TREE;
+ result_valid_p = true;
+ break;
default:
+ if (flags & LOOKUP_COMPLAIN)
+ {
+ op_error (code, code2, arg1, arg2, arg3, "no match");
+ print_z_candidates (candidates);
+ }
+ result = error_mark_node;
break;
}
- if (flags & LOOKUP_COMPLAIN)
- {
- op_error (code, code2, arg1, arg2, arg3, "no match");
- print_z_candidates (candidates);
- }
- return error_mark_node;
}
-
- cand = tourney (candidates);
- if (cand == 0)
+ else
{
- if (flags & LOOKUP_COMPLAIN)
+ cand = tourney (candidates);
+ if (cand == 0)
{
- op_error (code, code2, arg1, arg2, arg3, "ambiguous overload");
- print_z_candidates (candidates);
+ if (flags & LOOKUP_COMPLAIN)
+ {
+ op_error (code, code2, arg1, arg2, arg3, "ambiguous overload");
+ print_z_candidates (candidates);
+ }
+ result = error_mark_node;
}
- return error_mark_node;
- }
-
- if (TREE_CODE (cand->fn) == FUNCTION_DECL)
- {
- if (warn_synth
- && fnname == ansi_assopname (NOP_EXPR)
- && DECL_ARTIFICIAL (cand->fn)
- && candidates->next
- && ! candidates->next->next)
+ else if (TREE_CODE (cand->fn) == FUNCTION_DECL)
{
- warning ("using synthesized `%#D' for copy assignment",
- cand->fn);
- cp_warning_at (" where cfront would use `%#D'",
- cand == candidates
- ? candidates->next->fn
- : candidates->fn);
- }
-
- return build_over_call (cand, LOOKUP_NORMAL);
- }
+ if (warn_synth
+ && fnname == ansi_assopname (NOP_EXPR)
+ && DECL_ARTIFICIAL (cand->fn)
+ && candidates->next
+ && ! candidates->next->next)
+ {
+ warning ("using synthesized `%#D' for copy assignment",
+ cand->fn);
+ cp_warning_at (" where cfront would use `%#D'",
+ cand == candidates
+ ? candidates->next->fn
+ : candidates->fn);
+ }
- /* Check for comparison of different enum types. */
- switch (code)
- {
- case GT_EXPR:
- case LT_EXPR:
- case GE_EXPR:
- case LE_EXPR:
- case EQ_EXPR:
- case NE_EXPR:
- if (TREE_CODE (TREE_TYPE (arg1)) == ENUMERAL_TYPE
- && TREE_CODE (TREE_TYPE (arg2)) == ENUMERAL_TYPE
- && (TYPE_MAIN_VARIANT (TREE_TYPE (arg1))
- != TYPE_MAIN_VARIANT (TREE_TYPE (arg2))))
+ result = build_over_call (cand, LOOKUP_NORMAL);
+ }
+ else
{
- warning ("comparison between `%#T' and `%#T'",
- TREE_TYPE (arg1), TREE_TYPE (arg2));
+ /* Check for comparison of different enum types. */
+ switch (code)
+ {
+ case GT_EXPR:
+ case LT_EXPR:
+ case GE_EXPR:
+ case LE_EXPR:
+ case EQ_EXPR:
+ case NE_EXPR:
+ if (TREE_CODE (TREE_TYPE (arg1)) == ENUMERAL_TYPE
+ && TREE_CODE (TREE_TYPE (arg2)) == ENUMERAL_TYPE
+ && (TYPE_MAIN_VARIANT (TREE_TYPE (arg1))
+ != TYPE_MAIN_VARIANT (TREE_TYPE (arg2))))
+ {
+ warning ("comparison between `%#T' and `%#T'",
+ TREE_TYPE (arg1), TREE_TYPE (arg2));
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* We need to strip any leading REF_BIND so that bitfields
+ don't cause errors. This should not remove any important
+ conversions, because builtins don't apply to class
+ objects directly. */
+ conv = cand->convs[0];
+ if (conv->kind == ck_ref_bind)
+ conv = conv->u.next;
+ arg1 = convert_like (conv, arg1);
+ if (arg2)
+ {
+ conv = cand->convs[1];
+ if (conv->kind == ck_ref_bind)
+ conv = conv->u.next;
+ arg2 = convert_like (conv, arg2);
+ }
+ if (arg3)
+ {
+ conv = cand->convs[2];
+ if (conv->kind == ck_ref_bind)
+ conv = conv->u.next;
+ arg3 = convert_like (conv, arg3);
+ }
}
- break;
- default:
- break;
}
- /* We need to strip any leading REF_BIND so that bitfields don't cause
- errors. This should not remove any important conversions, because
- builtins don't apply to class objects directly. */
- conv = TREE_VEC_ELT (cand->convs, 0);
- if (TREE_CODE (conv) == REF_BIND)
- conv = TREE_OPERAND (conv, 0);
- arg1 = convert_like (conv, arg1);
- if (arg2)
- {
- conv = TREE_VEC_ELT (cand->convs, 1);
- if (TREE_CODE (conv) == REF_BIND)
- conv = TREE_OPERAND (conv, 0);
- arg2 = convert_like (conv, arg2);
- }
- if (arg3)
- {
- conv = TREE_VEC_ELT (cand->convs, 2);
- if (TREE_CODE (conv) == REF_BIND)
- conv = TREE_OPERAND (conv, 0);
- arg3 = convert_like (conv, arg3);
- }
+ user_defined_result_ready:
+
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
+
+ if (result || result_valid_p)
+ return result;
builtin:
switch (code)
CODE is either DELETE_EXPR or VEC_DELETE_EXPR.
ADDR is the pointer to be deleted.
SIZE is the size of the memory block to be deleted.
- FLAGS are the usual overloading flags.
+ GLOBAL_P is true if the delete-expression should not consider
+ class-specific delete operators.
PLACEMENT is the corresponding placement new call, or NULL_TREE. */
tree
build_op_delete_call (enum tree_code code, tree addr, tree size,
- int flags, tree placement)
+ bool global_p, tree placement)
{
tree fn = NULL_TREE;
tree fns, fnname, argtypes, args, type;
fnname = ansi_opname (code);
- if (IS_AGGR_TYPE (type) && ! (flags & LOOKUP_GLOBAL))
+ if (IS_AGGR_TYPE (type) && !global_p)
/* In [class.free]
If the result of the lookup is ambiguous or inaccessible, or if
conversions will be emitted if appropriate. */
static tree
-convert_like_real (tree convs, tree expr, tree fn, int argnum, int inner,
- bool issue_conversion_warnings)
+convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
+ int inner, bool issue_conversion_warnings)
{
- tree totype = TREE_TYPE (convs);
+ tree totype = convs->type;
void (*diagnostic_fn)(const char *, ...);
- if (ICS_BAD_FLAG (convs)
- && TREE_CODE (convs) != USER_CONV
- && TREE_CODE (convs) != AMBIG_CONV
- && TREE_CODE (convs) != REF_BIND)
+ if (convs->bad_p
+ && convs->kind != ck_user
+ && convs->kind != ck_ambig
+ && convs->kind != ck_ref_bind)
{
- tree t = convs;
- for (; t; t = TREE_OPERAND (t, 0))
+ conversion *t = convs;
+ for (; t; t = convs->u.next)
{
- if (TREE_CODE (t) == USER_CONV || !ICS_BAD_FLAG (t))
+ if (t->kind == ck_user || !t->bad_p)
{
expr = convert_like_real (t, expr, fn, argnum, 1,
/*issue_conversion_warnings=*/false);
break;
}
- else if (TREE_CODE (t) == AMBIG_CONV)
+ else if (t->kind == ck_ambig)
return convert_like_real (t, expr, fn, argnum, 1,
/*issue_conversion_warnings=*/false);
- else if (TREE_CODE (t) == IDENTITY_CONV)
+ else if (t->kind == ck_identity)
break;
}
pedwarn ("invalid conversion from `%T' to `%T'", TREE_TYPE (expr), totype);
if (issue_conversion_warnings)
expr = dubious_conversion_warnings
(totype, expr, "converting", fn, argnum);
- switch (TREE_CODE (convs))
+ switch (convs->kind)
{
- case USER_CONV:
+ case ck_user:
{
- struct z_candidate *cand = USER_CONV_CAND (convs);
+ struct z_candidate *cand = convs->cand;
tree convfn = cand->fn;
tree args;
}
return expr;
}
- case IDENTITY_CONV:
+ case ck_identity:
if (type_unknown_p (expr))
expr = instantiate_type (totype, expr, tf_error | tf_warning);
/* Convert a non-array constant variable to its underlying value, unless we
if (inner >= 0
&& TREE_CODE (TREE_TYPE (expr)) != ARRAY_TYPE)
expr = decl_constant_value (expr);
- if (CHECK_COPY_CONSTRUCTOR_P (convs))
+ if (convs->check_copy_constructor_p)
/* Generate a temporary copy purely to generate the required
diagnostics. */
build_temp (build_dummy_object (totype), totype,
LOOKUP_NORMAL|LOOKUP_ONLYCONVERTING,
&diagnostic_fn);
return expr;
- case AMBIG_CONV:
+ case ck_ambig:
/* Call build_user_type_conversion again for the error. */
return build_user_type_conversion
- (totype, TREE_OPERAND (convs, 0), LOOKUP_NORMAL);
+ (totype, convs->u.expr, LOOKUP_NORMAL);
default:
break;
};
- expr = convert_like_real (TREE_OPERAND (convs, 0), expr, fn, argnum,
- TREE_CODE (convs) == REF_BIND ? -1 : 1,
+ expr = convert_like_real (convs->u.next, expr, fn, argnum,
+ convs->kind == ck_ref_bind ? -1 : 1,
/*issue_conversion_warnings=*/false);
if (expr == error_mark_node)
return error_mark_node;
- switch (TREE_CODE (convs))
+ switch (convs->kind)
{
- case RVALUE_CONV:
+ case ck_rvalue:
if (! IS_AGGR_TYPE (totype))
return expr;
/* Else fall through. */
- case BASE_CONV:
- if (TREE_CODE (convs) == BASE_CONV && !NEED_TEMPORARY_P (convs))
+ case ck_base:
+ if (convs->kind == ck_base && !convs->need_temporary_p)
{
/* We are going to bind a reference directly to a base-class
subobject of EXPR. */
- if (CHECK_COPY_CONSTRUCTOR_P (convs))
+ if (convs->check_copy_constructor_p)
/* Generate a temporary copy purely to generate the required
diagnostics. */
build_temp (build_dummy_object (TREE_TYPE (expr)),
diagnostic_fn (" initializing argument %P of `%D'", argnum, fn);
return build_cplus_new (totype, expr);
- case REF_BIND:
+ case ck_ref_bind:
{
tree ref_type = totype;
/* If necessary, create a temporary. */
- if (NEED_TEMPORARY_P (convs) || !lvalue_p (expr))
+ if (convs->need_temporary_p || !lvalue_p (expr))
{
- tree type = TREE_TYPE (TREE_OPERAND (convs, 0));
+ tree type = convs->u.next->type;
if (!CP_TYPE_CONST_NON_VOLATILE_P (TREE_TYPE (ref_type)))
{
return build_nop (ref_type, expr);
}
- case LVALUE_CONV:
+ case ck_lvalue:
return decay_conversion (expr);
- case QUAL_CONV:
+ case ck_qual:
/* Warn about deprecated conversion if appropriate. */
string_conv_p (totype, expr, 1);
break;
{
tree fn = cand->fn;
tree args = cand->args;
- tree convs = cand->convs;
+ conversion **convs = cand->convs;
+ conversion *conv;
tree converted_args = NULL_TREE;
tree parm = TYPE_ARG_TYPES (TREE_TYPE (fn));
- tree conv, arg, val;
+ tree arg, val;
int i = 0;
int is_method = 0;
/* Give any warnings we noticed during overload resolution. */
if (cand->warnings)
- for (val = cand->warnings; val; val = TREE_CHAIN (val))
- joust (cand, WRAPPER_ZC (TREE_VALUE (val)), 1);
+ {
+ struct candidate_warning *w;
+ for (w = cand->warnings; w; w = w->next)
+ joust (cand, w->loser, 1);
+ }
if (DECL_FUNCTION_MEMBER_P (fn))
{
tree converted_arg;
tree base_binfo;
- if (ICS_BAD_FLAG (TREE_VEC_ELT (convs, i)))
+ if (convs[i]->bad_p)
pedwarn ("passing `%T' as `this' argument of `%#D' discards qualifiers",
TREE_TYPE (argtype), fn);
{
tree type = TREE_VALUE (parm);
- conv = TREE_VEC_ELT (convs, i);
+ conv = convs[i];
val = convert_like_with_context
(conv, TREE_VALUE (arg), fn, i - is_method);
if (! flag_elide_constructors)
/* Do things the hard way. */;
- else if (TREE_VEC_LENGTH (convs) == 1
- && DECL_COPY_CONSTRUCTOR_P (fn))
+ else if (cand->num_convs == 1 && DECL_COPY_CONSTRUCTOR_P (fn))
{
tree targ;
arg = skip_artificial_parms_for (fn, converted_args);
tree orig_instance;
tree orig_fns;
tree orig_args;
+ void *p;
my_friendly_assert (instance != NULL_TREE, 20020729);
class_type = (conversion_path ? BINFO_TYPE (conversion_path) : NULL_TREE);
mem_args = tree_cons (NULL_TREE, instance_ptr, args);
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
for (fn = fns; fn; fn = OVL_NEXT (fn))
{
tree t = OVL_CURRENT (fn);
candidates = splice_viable (candidates, pedantic, &any_viable_p);
if (!any_viable_p)
{
- /* XXX will LOOKUP_SPECULATIVELY be needed when this is done? */
- if (flags & LOOKUP_SPECULATIVELY)
- return NULL_TREE;
if (!COMPLETE_TYPE_P (basetype))
cxx_incomplete_type_error (instance_ptr, basetype);
else
free (pretty_name);
}
print_z_candidates (candidates);
- return error_mark_node;
+ call = error_mark_node;
}
-
- cand = tourney (candidates);
- if (cand == 0)
+ else
{
- char *pretty_name;
- bool free_p;
+ cand = tourney (candidates);
+ if (cand == 0)
+ {
+ char *pretty_name;
+ bool free_p;
- pretty_name = name_as_c_string (name, basetype, &free_p);
- error ("call of overloaded `%s(%A)' is ambiguous", pretty_name,
- user_args);
- print_z_candidates (candidates);
- if (free_p)
- free (pretty_name);
- return error_mark_node;
+ pretty_name = name_as_c_string (name, basetype, &free_p);
+ error ("call of overloaded `%s(%A)' is ambiguous", pretty_name,
+ user_args);
+ print_z_candidates (candidates);
+ if (free_p)
+ free (pretty_name);
+ call = error_mark_node;
+ }
+ else
+ {
+ if (DECL_PURE_VIRTUAL_P (cand->fn)
+ && instance == current_class_ref
+ && (DECL_CONSTRUCTOR_P (current_function_decl)
+ || DECL_DESTRUCTOR_P (current_function_decl))
+ && ! (flags & LOOKUP_NONVIRTUAL)
+ && value_member (cand->fn, CLASSTYPE_PURE_VIRTUALS (basetype)))
+ error ((DECL_CONSTRUCTOR_P (current_function_decl) ?
+ "abstract virtual `%#D' called from constructor"
+ : "abstract virtual `%#D' called from destructor"),
+ cand->fn);
+ if (TREE_CODE (TREE_TYPE (cand->fn)) == METHOD_TYPE
+ && is_dummy_object (instance_ptr))
+ {
+ error ("cannot call member function `%D' without object",
+ cand->fn);
+ call = error_mark_node;
+ }
+ else
+ {
+ if (DECL_VINDEX (cand->fn) && ! (flags & LOOKUP_NONVIRTUAL)
+ && resolves_to_fixed_type_p (instance, 0))
+ flags |= LOOKUP_NONVIRTUAL;
+
+ call = build_over_call (cand, flags);
+
+ /* In an expression of the form `a->f()' where `f' turns
+ out to be a static member function, `a' is
+ none-the-less evaluated. */
+ if (TREE_CODE (TREE_TYPE (cand->fn)) != METHOD_TYPE
+ && !is_dummy_object (instance_ptr)
+ && TREE_SIDE_EFFECTS (instance))
+ call = build (COMPOUND_EXPR, TREE_TYPE (call),
+ instance, call);
+ }
+ }
}
- if (DECL_PURE_VIRTUAL_P (cand->fn)
- && instance == current_class_ref
- && (DECL_CONSTRUCTOR_P (current_function_decl)
- || DECL_DESTRUCTOR_P (current_function_decl))
- && ! (flags & LOOKUP_NONVIRTUAL)
- && value_member (cand->fn, CLASSTYPE_PURE_VIRTUALS (basetype)))
- error ((DECL_CONSTRUCTOR_P (current_function_decl) ?
- "abstract virtual `%#D' called from constructor"
- : "abstract virtual `%#D' called from destructor"),
- cand->fn);
- if (TREE_CODE (TREE_TYPE (cand->fn)) == METHOD_TYPE
- && is_dummy_object (instance_ptr))
- {
- error ("cannot call member function `%D' without object", cand->fn);
- return error_mark_node;
- }
+ if (processing_template_decl && call != error_mark_node)
+ call = (build_min_non_dep
+ (CALL_EXPR, call,
+ build_min_nt (COMPONENT_REF, orig_instance, orig_fns),
+ orig_args));
- if (DECL_VINDEX (cand->fn) && ! (flags & LOOKUP_NONVIRTUAL)
- && resolves_to_fixed_type_p (instance, 0))
- flags |= LOOKUP_NONVIRTUAL;
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
- if (TREE_CODE (TREE_TYPE (cand->fn)) == METHOD_TYPE)
- call = build_over_call (cand, flags);
- else
- {
- call = build_over_call (cand, flags);
- /* In an expression of the form `a->f()' where `f' turns out to
- be a static member function, `a' is none-the-less evaluated. */
- if (!is_dummy_object (instance_ptr) && TREE_SIDE_EFFECTS (instance))
- call = build (COMPOUND_EXPR, TREE_TYPE (call), instance, call);
- }
-
- if (processing_template_decl && call != error_mark_node)
- return build_min_non_dep
- (CALL_EXPR, call,
- build_min_nt (COMPONENT_REF, orig_instance, orig_fns),
- orig_args);
return call;
}
subsequence of ICS2. */
static bool
-is_subseq (tree ics1, tree ics2)
+is_subseq (conversion *ics1, conversion *ics2)
{
/* We can assume that a conversion of the same code
between the same types indicates a subsequence since we only get
here if the types we are converting from are the same. */
- while (TREE_CODE (ics1) == RVALUE_CONV
- || TREE_CODE (ics1) == LVALUE_CONV)
- ics1 = TREE_OPERAND (ics1, 0);
+ while (ics1->kind == ck_rvalue
+ || ics1->kind == ck_lvalue)
+ ics1 = ics1->u.next;
while (1)
{
- while (TREE_CODE (ics2) == RVALUE_CONV
- || TREE_CODE (ics2) == LVALUE_CONV)
- ics2 = TREE_OPERAND (ics2, 0);
+ while (ics2->kind == ck_rvalue
+ || ics2->kind == ck_lvalue)
+ ics2 = ics2->u.next;
- if (TREE_CODE (ics2) == USER_CONV
- || TREE_CODE (ics2) == AMBIG_CONV
- || TREE_CODE (ics2) == IDENTITY_CONV)
+ if (ics2->kind == ck_user
+ || ics2->kind == ck_ambig
+ || ics2->kind == ck_identity)
/* At this point, ICS1 cannot be a proper subsequence of
ICS2. We can get a USER_CONV when we are comparing the
second standard conversion sequence of two user conversion
sequences. */
return false;
- ics2 = TREE_OPERAND (ics2, 0);
+ ics2 = ics2->u.next;
- if (TREE_CODE (ics2) == TREE_CODE (ics1)
- && same_type_p (TREE_TYPE (ics2), TREE_TYPE (ics1))
- && same_type_p (TREE_TYPE (TREE_OPERAND (ics2, 0)),
- TREE_TYPE (TREE_OPERAND (ics1, 0))))
+ if (ics2->kind == ics1->kind
+ && same_type_p (ics2->type, ics1->type)
+ && same_type_p (ics2->u.next->type,
+ ics1->u.next->type))
return true;
}
}
modify it accordingly. */
static void
-maybe_handle_implicit_object (tree *ics)
+maybe_handle_implicit_object (conversion **ics)
{
- if (ICS_THIS_FLAG (*ics))
+ if ((*ics)->this_p)
{
/* [over.match.funcs]
where X is the class of which the function is a
member and cv is the cv-qualification on the member
function declaration. */
- tree t = *ics;
+ conversion *t = *ics;
tree reference_type;
/* The `this' parameter is a pointer to a class type. Make the
implicit conversion talk about a reference to that same class
type. */
- reference_type = TREE_TYPE (TREE_TYPE (*ics));
+ reference_type = TREE_TYPE (t->type);
reference_type = build_reference_type (reference_type);
- if (TREE_CODE (t) == QUAL_CONV)
- t = TREE_OPERAND (t, 0);
- if (TREE_CODE (t) == PTR_CONV)
- t = TREE_OPERAND (t, 0);
- t = build1 (IDENTITY_CONV, TREE_TYPE (TREE_TYPE (t)), NULL_TREE);
+ if (t->kind == ck_qual)
+ t = t->u.next;
+ if (t->kind == ck_ptr)
+ t = t->u.next;
+ t = build_identity_conv (TREE_TYPE (t->type), NULL_TREE);
t = direct_reference_binding (reference_type, t);
*ics = t;
}
leave *ICS unchanged and return NULL_TREE. */
static tree
-maybe_handle_ref_bind (tree *ics)
+maybe_handle_ref_bind (conversion **ics)
{
- if (TREE_CODE (*ics) == REF_BIND)
+ if ((*ics)->kind == ck_ref_bind)
{
- tree old_ics = *ics;
- tree type = TREE_TYPE (TREE_TYPE (old_ics));
- *ics = TREE_OPERAND (old_ics, 0);
- ICS_USER_FLAG (*ics) = ICS_USER_FLAG (old_ics);
- ICS_BAD_FLAG (*ics) = ICS_BAD_FLAG (old_ics);
+ conversion *old_ics = *ics;
+ tree type = TREE_TYPE (old_ics->type);
+ *ics = old_ics->u.next;
+ (*ics)->user_conv_p = old_ics->user_conv_p;
+ (*ics)->bad_p = old_ics->bad_p;
return type;
}
0: ics1 and ics2 are indistinguishable */
static int
-compare_ics (tree ics1, tree ics2)
+compare_ics (conversion *ics1, conversion *ics2)
{
tree from_type1;
tree from_type2;
tree deref_from_type2 = NULL_TREE;
tree deref_to_type1 = NULL_TREE;
tree deref_to_type2 = NULL_TREE;
- int rank1, rank2;
+ conversion_rank rank1, rank2;
/* REF_BINDING is nonzero if the result of the conversion sequence
is a reference type. In that case TARGET_TYPE is the
--a user-defined conversion sequence (_over.ics.user_) is a
better conversion sequence than an ellipsis conversion sequence
(_over.ics.ellipsis_). */
- rank1 = ICS_RANK (ics1);
- rank2 = ICS_RANK (ics2);
+ rank1 = CONVERSION_RANK (ics1);
+ rank2 = CONVERSION_RANK (ics2);
if (rank1 > rank2)
return -1;
else if (rank1 < rank2)
return 1;
- if (rank1 == BAD_RANK)
+ if (rank1 == cr_bad)
{
/* XXX Isn't this an extension? */
/* Both ICS are bad. We try to make a decision based on what
would have happened if they'd been good. */
- if (ICS_USER_FLAG (ics1) > ICS_USER_FLAG (ics2)
- || ICS_STD_RANK (ics1) > ICS_STD_RANK (ics2))
+ if (ics1->user_conv_p > ics2->user_conv_p
+ || ics1->rank > ics2->rank)
return -1;
- else if (ICS_USER_FLAG (ics1) < ICS_USER_FLAG (ics2)
- || ICS_STD_RANK (ics1) < ICS_STD_RANK (ics2))
+ else if (ics1->user_conv_p < ics2->user_conv_p
+ || ics1->rank < ics2->rank)
return 1;
/* We couldn't make up our minds; try to figure it out below. */
}
- if (ICS_ELLIPSIS_FLAG (ics1))
+ if (ics1->ellipsis_p)
/* Both conversions are ellipsis conversions. */
return 0;
ond standard conversion sequence of U1 is better than the second
standard conversion sequence of U2. */
- if (ICS_USER_FLAG (ics1))
+ if (ics1->user_conv_p)
{
- tree t1, t2;
+ conversion *t1;
+ conversion *t2;
- for (t1 = ics1; TREE_CODE (t1) != USER_CONV; t1 = TREE_OPERAND (t1, 0))
- if (TREE_CODE (t1) == AMBIG_CONV)
+ for (t1 = ics1; t1->kind != ck_user; t1 = t1->u.next)
+ if (t1->kind == ck_ambig)
return 0;
- for (t2 = ics2; TREE_CODE (t2) != USER_CONV; t2 = TREE_OPERAND (t2, 0))
- if (TREE_CODE (t2) == AMBIG_CONV)
+ for (t2 = ics2; t2->kind != ck_user; t2 = t2->u.next)
+ if (t2->kind == ck_ambig)
return 0;
- if (USER_CONV_FN (t1) != USER_CONV_FN (t2))
+ if (t1->cand->fn != t2->cand->fn)
return 0;
/* We can just fall through here, after setting up
FROM_TYPE1 and FROM_TYPE2. */
- from_type1 = TREE_TYPE (t1);
- from_type2 = TREE_TYPE (t2);
+ from_type1 = t1->type;
+ from_type2 = t2->type;
}
else
{
+ conversion *t1;
+ conversion *t2;
+
/* We're dealing with two standard conversion sequences.
[over.ics.rank]
conversion sequence is considered to be a subsequence of
any non-identity conversion sequence */
- from_type1 = ics1;
- while (TREE_CODE (from_type1) != IDENTITY_CONV)
- from_type1 = TREE_OPERAND (from_type1, 0);
- from_type1 = TREE_TYPE (from_type1);
+ t1 = ics1;
+ while (t1->kind != ck_identity)
+ t1 = t1->u.next;
+ from_type1 = t1->type;
- from_type2 = ics2;
- while (TREE_CODE (from_type2) != IDENTITY_CONV)
- from_type2 = TREE_OPERAND (from_type2, 0);
- from_type2 = TREE_TYPE (from_type2);
+ t2 = ics2;
+ while (t2->kind != ck_identity)
+ t2 = t2->u.next;
+ from_type2 = t2->type;
}
if (same_type_p (from_type1, from_type2))
The ICS_STD_RANK automatically handles the pointer-to-bool rule,
so that we do not have to check it explicitly. */
- if (ICS_STD_RANK (ics1) < ICS_STD_RANK (ics2))
+ if (ics1->rank < ics2->rank)
return 1;
- else if (ICS_STD_RANK (ics2) < ICS_STD_RANK (ics1))
+ else if (ics2->rank < ics1->rank)
return -1;
- to_type1 = TREE_TYPE (ics1);
- to_type2 = TREE_TYPE (ics2);
+ to_type1 = ics1->type;
+ to_type2 = ics2->type;
if (TYPE_PTR_P (from_type1)
&& TYPE_PTR_P (from_type2)
similar types T1 and T2 (_conv.qual_), respectively, and the cv-
qualification signature of type T1 is a proper subset of the cv-
qualification signature of type T2 */
- if (TREE_CODE (ics1) == QUAL_CONV
- && TREE_CODE (ics2) == QUAL_CONV
+ if (ics1->kind == ck_qual
+ && ics2->kind == ck_qual
&& same_type_p (from_type1, from_type2))
return comp_cv_qual_signature (to_type1, to_type2);
/* The source type for this standard conversion sequence. */
static tree
-source_type (tree t)
+source_type (conversion *t)
{
- for (;; t = TREE_OPERAND (t, 0))
+ for (;; t = t->u.next)
{
- if (TREE_CODE (t) == USER_CONV
- || TREE_CODE (t) == AMBIG_CONV
- || TREE_CODE (t) == IDENTITY_CONV)
- return TREE_TYPE (t);
+ if (t->kind == ck_user
+ || t->kind == ck_ambig
+ || t->kind == ck_identity)
+ return t->type;
}
abort ();
}
static void
add_warning (struct z_candidate *winner, struct z_candidate *loser)
{
- winner->warnings = tree_cons (NULL_TREE,
- build_zc_wrapper (loser),
- winner->warnings);
+ candidate_warning *cw;
+
+ cw = conversion_obstack_alloc (sizeof (candidate_warning));
+ cw->loser = loser;
+ cw->next = winner->warnings;
+ winner->warnings = cw;
}
/* Compare two candidates for overloading as described in
joust (struct z_candidate *cand1, struct z_candidate *cand2, bool warn)
{
int winner = 0;
- int i, off1 = 0, off2 = 0, len;
+ int off1 = 0, off2 = 0;
+ size_t i;
+ size_t len;
/* Candidates that involve bad conversions are always worse than those
that don't. */
the implicit object parameter of the non-static function. The
standard says to pretend that the static function has an object
parm, but that won't work with operator overloading. */
- len = TREE_VEC_LENGTH (cand1->convs);
- if (len != TREE_VEC_LENGTH (cand2->convs))
+ len = cand1->num_convs;
+ if (len != cand2->num_convs)
{
if (DECL_STATIC_FUNCTION_P (cand1->fn)
&& ! DECL_STATIC_FUNCTION_P (cand2->fn))
for (i = 0; i < len; ++i)
{
- tree t1 = TREE_VEC_ELT (cand1->convs, i+off1);
- tree t2 = TREE_VEC_ELT (cand2->convs, i+off2);
+ conversion *t1 = cand1->convs[i + off1];
+ conversion *t2 = cand2->convs[i + off2];
int comp = compare_ics (t1, t2);
if (comp != 0)
{
if (warn_sign_promo
- && ICS_RANK (t1) + ICS_RANK (t2) == STD_RANK + PROMO_RANK
- && TREE_CODE (t1) == STD_CONV
- && TREE_CODE (t2) == STD_CONV
- && TREE_CODE (TREE_TYPE (t1)) == INTEGER_TYPE
- && TREE_CODE (TREE_TYPE (t2)) == INTEGER_TYPE
- && (TYPE_PRECISION (TREE_TYPE (t1))
- == TYPE_PRECISION (TREE_TYPE (t2)))
- && (TREE_UNSIGNED (TREE_TYPE (TREE_OPERAND (t1, 0)))
- || (TREE_CODE (TREE_TYPE (TREE_OPERAND (t1, 0)))
+ && (CONVERSION_RANK (t1) + CONVERSION_RANK (t2)
+ == cr_std + cr_promotion)
+ && t1->kind == ck_std
+ && t2->kind == ck_std
+ && TREE_CODE (t1->type) == INTEGER_TYPE
+ && TREE_CODE (t2->type) == INTEGER_TYPE
+ && (TYPE_PRECISION (t1->type)
+ == TYPE_PRECISION (t2->type))
+ && (TREE_UNSIGNED (t1->u.next->type)
+ || (TREE_CODE (t1->u.next->type)
== ENUMERAL_TYPE)))
{
- tree type = TREE_TYPE (TREE_OPERAND (t1, 0));
+ tree type = t1->u.next->type;
tree type1, type2;
struct z_candidate *w, *l;
if (comp > 0)
- type1 = TREE_TYPE (t1), type2 = TREE_TYPE (t2),
+ type1 = t1->type, type2 = t2->type,
w = cand1, l = cand2;
else
- type1 = TREE_TYPE (t2), type2 = TREE_TYPE (t1),
+ type1 = t2->type, type2 = t1->type,
w = cand2, l = cand1;
if (warn)
/*NOP*/;
else if (warn)
{
- tree source = source_type (TREE_VEC_ELT (w->convs, 0));
+ tree source = source_type (w->convs[0]);
if (! DECL_CONSTRUCTOR_P (w->fn))
source = TREE_TYPE (source);
warning ("choosing `%D' over `%D'", w->fn, l->fn);
warning (" for conversion from `%T' to `%T'",
- source, TREE_TYPE (w->second_conv));
+ source, w->second_conv->type);
warning (" because conversion sequence for the argument is better");
}
else
[temp.func.order]: The presence of unused ellipsis and default
arguments has no effect on the partial ordering of function
templates. */
- TREE_VEC_LENGTH (cand1->convs)
+ cand1->num_convs
- (DECL_NONSTATIC_MEMBER_FUNCTION_P (cand1->fn)
- DECL_CONSTRUCTOR_P (cand1->fn)));
if (winner)
|| TREE_CODE (cand2->fn) == IDENTIFIER_NODE)
{
for (i = 0; i < len; ++i)
- if (!same_type_p (TREE_TYPE (TREE_VEC_ELT (cand1->convs, i)),
- TREE_TYPE (TREE_VEC_ELT (cand2->convs, i))))
+ if (!same_type_p (cand1->convs[i]->type,
+ cand2->convs[i]->type))
break;
- if (i == TREE_VEC_LENGTH (cand1->convs))
+ if (i == cand1->num_convs)
{
if (cand1->fn == cand2->fn)
/* Two built-in candidates; arbitrarily pick one. */
worst conversion for the other, take the first. */
if (!pedantic)
{
- int rank1 = IDENTITY_RANK, rank2 = IDENTITY_RANK;
+ conversion_rank rank1 = cr_identity, rank2 = cr_identity;
struct z_candidate *w = 0, *l = 0;
for (i = 0; i < len; ++i)
{
- if (ICS_RANK (TREE_VEC_ELT (cand1->convs, i+off1)) > rank1)
- rank1 = ICS_RANK (TREE_VEC_ELT (cand1->convs, i+off1));
- if (ICS_RANK (TREE_VEC_ELT (cand2->convs, i+off2)) > rank2)
- rank2 = ICS_RANK (TREE_VEC_ELT (cand2->convs, i+off2));
+ if (CONVERSION_RANK (cand1->convs[i+off1]) > rank1)
+ rank1 = CONVERSION_RANK (cand1->convs[i+off1]);
+ if (CONVERSION_RANK (cand2->convs[i + off2]) > rank2)
+ rank2 = CONVERSION_RANK (cand2->convs[i + off2]);
}
if (rank1 < rank2)
winner = 1, w = cand1, l = cand2;
bool
can_convert_arg (tree to, tree from, tree arg)
{
- tree t = implicit_conversion (to, from, arg, LOOKUP_NORMAL);
- return (t && ! ICS_BAD_FLAG (t));
+ conversion *t;
+ void *p;
+ bool ok_p;
+
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
+ t = implicit_conversion (to, from, arg, LOOKUP_NORMAL);
+ ok_p = (t && !t->bad_p);
+
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
+
+ return ok_p;
}
/* Like can_convert_arg, but allows dubious conversions as well. */
bool
can_convert_arg_bad (tree to, tree from, tree arg)
{
- return implicit_conversion (to, from, arg, LOOKUP_NORMAL) != 0;
+ conversion *t;
+ void *p;
+
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+ /* Try to perform the conversion. */
+ t = implicit_conversion (to, from, arg, LOOKUP_NORMAL);
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
+
+ return t != NULL;
}
/* Convert EXPR to TYPE. Return the converted expression.
tree
perform_implicit_conversion (tree type, tree expr)
{
- tree conv;
-
+ conversion *conv;
+ void *p;
+
if (error_operand_p (expr))
return error_mark_node;
+
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
conv = implicit_conversion (type, TREE_TYPE (expr), expr,
LOOKUP_NORMAL);
if (!conv)
{
error ("could not convert `%E' to `%T'", expr, type);
- return error_mark_node;
+ expr = error_mark_node;
}
+ else
+ expr = convert_like (conv, expr);
+
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
- return convert_like (conv, expr);
+ return expr;
}
/* Convert EXPR to TYPE (as a direct-initialization) if that is
tree
perform_direct_initialization_if_possible (tree type, tree expr)
{
- tree conv;
-
+ conversion *conv;
+ void *p;
+
if (type == error_mark_node || error_operand_p (expr))
return error_mark_node;
/* [dcl.init]
LOOKUP_NORMAL);
return build_cplus_new (type, expr);
}
+
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
conv = implicit_conversion (type, TREE_TYPE (expr), expr,
LOOKUP_NORMAL);
- if (!conv || ICS_BAD_FLAG (conv))
- return NULL_TREE;
- return convert_like_real (conv, expr, NULL_TREE, 0, 0,
- /*issue_conversion_warnings=*/false);
+ if (!conv || conv->bad_p)
+ expr = NULL_TREE;
+ else
+ expr = convert_like_real (conv, expr, NULL_TREE, 0, 0,
+ /*issue_conversion_warnings=*/false);
+
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
+
+ return expr;
}
/* DECL is a VAR_DECL whose type is a REFERENCE_TYPE. The reference
tree
initialize_reference (tree type, tree expr, tree decl, tree *cleanup)
{
- tree conv;
+ conversion *conv;
+ void *p;
if (type == error_mark_node || error_operand_p (expr))
return error_mark_node;
+ /* Get the high-water mark for the CONVERSION_OBSTACK. */
+ p = conversion_obstack_alloc (0);
+
conv = reference_binding (type, TREE_TYPE (expr), expr, LOOKUP_NORMAL);
- if (!conv || ICS_BAD_FLAG (conv))
+ if (!conv || conv->bad_p)
{
if (!(TYPE_QUALS (TREE_TYPE (type)) & TYPE_QUAL_CONST)
&& !real_lvalue_p (expr))
we can extend the lifetime of the return value of the conversion
operator. */
- my_friendly_assert (TREE_CODE (conv) == REF_BIND, 20030302);
+ my_friendly_assert (conv->kind == ck_ref_bind, 20030302);
if (decl)
{
tree var;
tree base_conv_type;
/* Skip over the REF_BIND. */
- conv = TREE_OPERAND (conv, 0);
+ conv = conv->u.next;
/* If the next conversion is a BASE_CONV, skip that too -- but
remember that the conversion was required. */
- if (TREE_CODE (conv) == BASE_CONV && !NEED_TEMPORARY_P (conv))
+ if (conv->kind == ck_base && conv->need_temporary_p)
{
void (*diagnostic_fn) (const char *, ...);
- if (CHECK_COPY_CONSTRUCTOR_P (conv))
+ if (conv->check_copy_constructor_p)
/* Generate a temporary copy purely to generate the required
diagnostics. */
build_temp (build_dummy_object (TREE_TYPE (expr)),
TREE_TYPE (expr),
LOOKUP_NORMAL|LOOKUP_ONLYCONVERTING,
&diagnostic_fn);
- base_conv_type = TREE_TYPE (conv);
- conv = TREE_OPERAND (conv, 0);
+ base_conv_type = conv->type;
+ conv = conv->u.next;
}
else
base_conv_type = NULL_TREE;
if (base_conv_type)
expr = (perform_implicit_conversion
(build_pointer_type (base_conv_type), expr));
- return build_nop (type, expr);
+ expr = build_nop (type, expr);
}
+ else
+ /* Perform the conversion. */
+ expr = convert_like (conv, expr);
+
+ /* Free all the conversions we allocated. */
+ obstack_free (&conversion_obstack, p);
- /* Perform the conversion. */
- return convert_like (conv, expr);
+ return expr;
}
#include "gt-cp-call.h"
projects / thirdparty / gcc.git / commitdiff
