SVt_PVIV
SVt_PVNV
SVt_PVMG
+ SVt_INVLIST
SVt_REGEXP
SVt_PVGV
SVt_PVLV
a typeglob. SVt_PVLV represents a scalar that delegates to another scalar
behind the scenes. It is used, e.g., for the return value of C<substr> and
for tied hash and array elements. It can hold any scalar value, including
-a typeglob. SVt_REGEXP is for regular expressions.
+a typeglob. SVt_REGEXP is for regular expressions. SVt_INVLIST is for Perl
+core internal use only.
SVt_PVMG represents a "normal" scalar (not a typeglob, regular expression,
or delegate). Since most scalars do not need all the internal fields of a
=for apidoc AmU||SVt_PVMG
Type flag for scalars. See L</svtype>.
+=for apidoc AmU||SVt_INVLIST
+Type flag for scalars. See L</svtype>.
+
=for apidoc AmU||SVt_REGEXP
Type flag for regular expressions. See L</svtype>.
Type flag for I/O objects. See L</svtype>.
=cut
+
+ These are ordered so that the simpler types have a lower value; SvUPGRADE
+ doesn't allow you to upgrade from a higher numbered type to a lower numbered
+ one; also there is code that assumes that anything that has as a PV component
+ has a type numbered >= SVt_PV.
*/
+
typedef enum {
SVt_NULL, /* 0 */
- SVt_DUMMY, /* 1 */
- SVt_IV, /* 2 */
- SVt_NV, /* 3 */
+ /* BIND was here, before INVLIST replaced it. */
+ SVt_IV, /* 1 */
+ SVt_NV, /* 2 */
/* RV was here, before it was merged with IV. */
- SVt_PV, /* 4 */
+ SVt_PV, /* 3 */
+ SVt_INVLIST, /* 4, implemented as a PV */
SVt_PVIV, /* 5 */
SVt_PVNV, /* 6 */
SVt_PVMG, /* 7 */
} svtype;
/* *** any alterations to the SV types above need to be reflected in
- * SVt_MASK and the various PL_valid_types_* tables */
+ * SVt_MASK and the various PL_valid_types_* tables. As of this writing those
+ * tables are in perl.h. There are also two affected names tables in dump.c,
+ * one in B.xs, and 'bodies_by_type[]' in sv.c */
#define SVt_MASK 0xf /* smallest bitmask that covers all types */
#ifndef PERL_CORE
/* Although Fast Boyer Moore tables are now being stored in PVGVs, for most
- purposes eternal code wanting to consider PVBM probably needs to think of
+ purposes external code wanting to consider PVBM probably needs to think of
PVMG instead. */
# define SVt_PVBM SVt_PVMG
/* Anything wanting to create a reference from clean should ensure that it has
char xlv_flags; /* 1 = negative offset 2 = negative len */
};
+struct xpvinvlist {
+ _XPV_HEAD;
+ IV prev_index;
+ STRLEN iterator;
+ bool is_offset; /* */
+};
+
/* This structure works in 3 ways - regular scalar, GV with GP, or fast
Boyer-Moore. */
struct xpvgv {
#define HvAMAGIC_off(hv) (SvFLAGS(hv) &=~ SVf_AMAGIC)
+/* "nog" means "doesn't have get magic" */
#define SvPOK_nog(sv) ((SvFLAGS(sv) & (SVf_POK|SVs_GMG)) == SVf_POK)
#define SvIOK_nog(sv) ((SvFLAGS(sv) & (SVf_IOK|SVs_GMG)) == SVf_IOK)
#define SvUOK_nog(sv) ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV|SVs_GMG)) == (SVf_IOK|SVf_IVisUV))
Note that there is no guarantee that the return value of C<SvPV()> is
equal to C<SvPVX(sv)>, or that C<SvPVX(sv)> contains valid data, or that
-successive calls to C<SvPV(sv)) will return the same pointer value each
+successive calls to C<SvPV(sv)> will return the same pointer value each
time. This is due to the way that things like overloading and
Copy-On-Write are handled. In these cases, the return value may point to
a temporary buffer or similar. If you absolutely need the SvPVX field to
#define newIO() MUTABLE_IO(newSV_type(SVt_PVIO))
+#define SV_CONST(name) \
+ PL_sv_consts[SV_CONST_##name] \
+ ? PL_sv_consts[SV_CONST_##name] \
+ : (PL_sv_consts[SV_CONST_##name] = newSVpv_share(#name, 0))
+
+#define SV_CONST_TIESCALAR 0
+#define SV_CONST_TIEARRAY 1
+#define SV_CONST_TIEHASH 2
+#define SV_CONST_TIEHANDLE 3
+
+#define SV_CONST_FETCH 4
+#define SV_CONST_FETCHSIZE 5
+#define SV_CONST_STORE 6
+#define SV_CONST_STORESIZE 7
+#define SV_CONST_EXISTS 8
+
+#define SV_CONST_PUSH 9
+#define SV_CONST_POP 10
+#define SV_CONST_SHIFT 11
+#define SV_CONST_UNSHIFT 12
+#define SV_CONST_SPLICE 13
+#define SV_CONST_EXTEND 14
+
+#define SV_CONST_FIRSTKEY 15
+#define SV_CONST_NEXTKEY 16
+#define SV_CONST_SCALAR 17
+
+#define SV_CONST_OPEN 18
+#define SV_CONST_WRITE 19
+#define SV_CONST_PRINT 20
+#define SV_CONST_PRINTF 21
+#define SV_CONST_READ 22
+#define SV_CONST_READLINE 23
+#define SV_CONST_GETC 24
+#define SV_CONST_SEEK 25
+#define SV_CONST_TELL 26
+#define SV_CONST_EOF 27
+#define SV_CONST_BINMODE 28
+#define SV_CONST_FILENO 29
+#define SV_CONST_CLOSE 30
+
+#define SV_CONST_DELETE 31
+#define SV_CONST_CLEAR 32
+#define SV_CONST_UNTIE 33
+#define SV_CONST_DESTROY 34
+
+#define SV_CONSTS_COUNT 35
+
/*
* Local variables:
* c-indentation-style: bsd