+ *
+ * Note that flags starting with RXf_PMf_ have exact equivalents
+ * stored in op_pmflags and which are defined in op.h, they are defined
+ * numerically here only for clarity.
+ *
+ * NOTE: if you modify any RXf flags you should run regen.pl or regcomp.pl
+ * so that regnodes.h is updated with the changes.
+ *
+ */
+
+/* 0x3F of extflags is used by (RXf_)PMf_COMPILETIME
+ * If you change these you need to change the equivalent flags in op.h, and
+ * vice versa. */
+#define RXf_PMf_MULTILINE 0x00000001 /* /m */
+#define RXf_PMf_SINGLELINE 0x00000002 /* /s */
+#define RXf_PMf_FOLD 0x00000004 /* /i */
+#define RXf_PMf_EXTENDED 0x00000008 /* /x */
+#define RXf_PMf_KEEPCOPY 0x00000010 /* /p */
+#define RXf_PMf_LOCALE 0x00000020 /* use locale */
+/* these flags are transfered from the PMOP->op_pmflags member during compilation */
+#define RXf_PMf_STD_PMMOD_SHIFT 0
+#define RXf_PMf_STD_PMMOD (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_FOLD|RXf_PMf_EXTENDED)
+#define RXf_PMf_COMPILETIME (RXf_PMf_MULTILINE|RXf_PMf_SINGLELINE|RXf_PMf_LOCALE|RXf_PMf_FOLD|RXf_PMf_EXTENDED|RXf_PMf_KEEPCOPY)
+
+#define CASE_STD_PMMOD_FLAGS_PARSE_SET(pmfl) \
+ case IGNORE_PAT_MOD: *(pmfl) |= RXf_PMf_FOLD; break; \
+ case MULTILINE_PAT_MOD: *(pmfl) |= RXf_PMf_MULTILINE; break; \
+ case SINGLE_PAT_MOD: *(pmfl) |= RXf_PMf_SINGLELINE; break; \
+ case XTENDED_PAT_MOD: *(pmfl) |= RXf_PMf_EXTENDED; break
+
+/* chars and strings used as regex pattern modifiers
+ * Singlular is a 'c'har, plural is a "string"
+ *
+ * NOTE, KEEPCOPY was originally 'k', but was changed to 'p' for preserve
+ * for compatibility reasons with Regexp::Common which highjacked (?k:...)
+ * for its own uses. So 'k' is out as well.
+ */
+#define EXEC_PAT_MOD 'e'
+#define KEEPCOPY_PAT_MOD 'p'
+#define ONCE_PAT_MOD 'o'
+#define GLOBAL_PAT_MOD 'g'
+#define CONTINUE_PAT_MOD 'c'
+#define MULTILINE_PAT_MOD 'm'
+#define SINGLE_PAT_MOD 's'
+#define IGNORE_PAT_MOD 'i'
+#define XTENDED_PAT_MOD 'x'
+
+#define ONCE_PAT_MODS "o"
+#define KEEPCOPY_PAT_MODS "p"
+#define EXEC_PAT_MODS "e"
+#define LOOP_PAT_MODS "gc"
+
+#define STD_PAT_MODS "msix"
+
+#define INT_PAT_MODS STD_PAT_MODS KEEPCOPY_PAT_MODS
+
+#define EXT_PAT_MODS ONCE_PAT_MODS KEEPCOPY_PAT_MODS
+#define QR_PAT_MODS STD_PAT_MODS EXT_PAT_MODS
+#define M_PAT_MODS QR_PAT_MODS LOOP_PAT_MODS
+#define S_PAT_MODS M_PAT_MODS EXEC_PAT_MODS
+
+/*
+ * NOTE: if you modify any RXf flags you should run regen.pl or regcomp.pl
+ * so that regnodes.h is updated with the changes.
+ *