X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/1129b882ced9d5881a47214405219a2e6e332a92..3983eafb40341b21a64d20c0c4e7e618101ee6ce:/pp.h

diff --git a/pp.h b/pp.h
index 6f0f258..f3da1a7 100644
--- a/pp.h
+++ b/pp.h
@@ -471,6 +471,36 @@ Does not use C<TARG>.  See also C<XPUSHu>, C<mPUSHu> and C<PUSHu>.
 #define tryAMAGICunDEREF_var(meth_enum) \
 	tryAMAGICunW_var(meth_enum,setAGAIN,0,(void)0)
 
+#define tryAMAGICftest(chr)				\
+    STMT_START {					\
+	assert(chr != '?');				\
+	if (SvAMAGIC(TOPs)) {				\
+	    const char tmpchr = (chr);			\
+	    SV * const tmpsv = amagic_call(TOPs,	\
+		newSVpvn_flags(&tmpchr, 1, SVs_TEMP),	\
+		ftest_amg, AMGf_unary);			\
+							\
+	    if (tmpsv) {				\
+		const OP *next = PL_op->op_next;	\
+							\
+		SPAGAIN;				\
+							\
+		if (next->op_type >= OP_FTRREAD &&	\
+		    next->op_type <= OP_FTBINARY &&	\
+		    next->op_private & OPpFT_STACKED	\
+		) {					\
+		    if (SvTRUE(tmpsv))			\
+			/* leave the object alone */	\
+			RETURN;				\
+		}					\
+							\
+		SETs(tmpsv);				\
+		RETURN;					\
+	    }						\
+	}						\
+    } STMT_END
+
+
 #define opASSIGN (PL_op->op_flags & OPf_STACKED)
 #define SETsv(sv)	STMT_START {					\
 		if (opASSIGN || (SvFLAGS(TARG) & SVs_PADMY))		\
@@ -500,6 +530,15 @@ True if this op will be the return value of an lvalue subroutine
 =cut */
 #define LVRET ((PL_op->op_private & OPpMAYBE_LVSUB) && is_lvalue_sub())
 
+#define SvCANEXISTDELETE(sv) \
+ (!SvRMAGICAL(sv)            \
+  || ((mg = mg_find((const SV *) sv, PERL_MAGIC_tied))           \
+      && (stash = SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(sv), mg)))) \
+      && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)          \
+      && gv_fetchmethod_autoload(stash, "DELETE", TRUE)          \
+     )                       \
+  )
+
 /*
  * Local variables:
  * c-indentation-style: bsd