feature.h

/* -*- mode: C; buffer-read-only: t -*-
   !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
   This file is built by regen/feature.pl.
   Any changes made here will be lost!
 */


#ifndef PERL_FEATURE_H_
#define PERL_FEATURE_H_

#if defined(PERL_CORE) || defined (PERL_EXT)

#define HINT_FEATURE_SHIFT	26

/* Index 0 */
#define FEATURE_ALL_BIT                             0x00000001
#define FEATURE_ANY_BIT                             0x00000002
#define FEATURE_APOS_AS_NAME_SEP_BIT                0x00000004
#define FEATURE_BAREWORD_FILEHANDLES_BIT            0x00000008
#define FEATURE_BITWISE_BIT                         0x00000010
#define FEATURE_CLASS_BIT                           0x00000020
#define FEATURE___SUB___BIT                         0x00000040
#define FEATURE_MYREF_BIT                           0x00000080
#define FEATURE_DEFER_BIT                           0x00000100
#define FEATURE_EVALBYTES_BIT                       0x00000200
#define FEATURE_MORE_DELIMS_BIT                     0x00000400
#define FEATURE_FC_BIT                              0x00000800
#define FEATURE_INDIRECT_BIT                        0x00001000
#define FEATURE_ISA_BIT                             0x00002000
#define FEATURE_MODULE_TRUE_BIT                     0x00004000
#define FEATURE_MULTIDIMENSIONAL_BIT                0x00008000
#define FEATURE_POSTDEREF_QQ_BIT                    0x00010000
#define FEATURE_REFALIASING_BIT                     0x00020000
#define FEATURE_SAY_BIT                             0x00040000
#define FEATURE_SIGNATURES_BIT                      0x00080000
#define FEATURE_SMARTMATCH_BIT                      0x00100000
#define FEATURE_STATE_BIT                           0x00200000
#define FEATURE_SWITCH_BIT                          0x00400000
#define FEATURE_TRY_BIT                             0x00800000
#define FEATURE_UNIEVAL_BIT                         0x01000000
#define FEATURE_UNICODE_BIT                         0x02000000

#define FEATURE_ALL_INDEX                             0
#define FEATURE_ANY_INDEX                             0
#define FEATURE_APOS_AS_NAME_SEP_INDEX                0
#define FEATURE_BAREWORD_FILEHANDLES_INDEX            0
#define FEATURE_BITWISE_INDEX                         0
#define FEATURE_CLASS_INDEX                           0
#define FEATURE___SUB___INDEX                         0
#define FEATURE_MYREF_INDEX                           0
#define FEATURE_DEFER_INDEX                           0
#define FEATURE_EVALBYTES_INDEX                       0
#define FEATURE_MORE_DELIMS_INDEX                     0
#define FEATURE_FC_INDEX                              0
#define FEATURE_INDIRECT_INDEX                        0
#define FEATURE_ISA_INDEX                             0
#define FEATURE_MODULE_TRUE_INDEX                     0
#define FEATURE_MULTIDIMENSIONAL_INDEX                0
#define FEATURE_POSTDEREF_QQ_INDEX                    0
#define FEATURE_REFALIASING_INDEX                     0
#define FEATURE_SAY_INDEX                             0
#define FEATURE_SIGNATURES_INDEX                      0
#define FEATURE_SMARTMATCH_INDEX                      0
#define FEATURE_STATE_INDEX                           0
#define FEATURE_SWITCH_INDEX                          0
#define FEATURE_TRY_INDEX                             0
#define FEATURE_UNIEVAL_INDEX                         0
#define FEATURE_UNICODE_INDEX                         0

#define REAL_COP_FEATURE_SIZE 1

/* If the following errors, update COP_FEATURE_SIZE in cop.h */
#if defined(COP_FEATURE_SIZE) && COP_FEATURE_SIZE != REAL_COP_FEATURE_SIZE
#  error "COP_FEATURE_SIZE and REAL_COP_FEATURE_SIZE don't match"
#endif

#define FEATURE_BUNDLE_DEFAULT	0
#define FEATURE_BUNDLE_510	1
#define FEATURE_BUNDLE_511	2
#define FEATURE_BUNDLE_515	3
#define FEATURE_BUNDLE_523	4
#define FEATURE_BUNDLE_527	5
#define FEATURE_BUNDLE_535	6
#define FEATURE_BUNDLE_537	7
#define FEATURE_BUNDLE_539	8
#define FEATURE_BUNDLE_541	9
#define FEATURE_BUNDLE_CUSTOM	(HINT_FEATURE_MASK >> HINT_FEATURE_SHIFT)

/* this is preserved for testing and asserts */
#define OLD_CURRENT_HINTS \
    (PL_curcop == &PL_compiling ? PL_hints : PL_curcop->cop_hints)
/* this is the same thing, but simpler (no if) as PL_hints expands
   to PL_compiling.cop_hints */
#define CURRENT_HINTS \
    PL_curcop->cop_hints
#define CURRENT_FEATURE_BUNDLE \
    ((CURRENT_HINTS & HINT_FEATURE_MASK) >> HINT_FEATURE_SHIFT)

#define FEATURE_IS_ENABLED_MASK(index, mask)                   \
  ((CURRENT_HINTS & HINT_LOCALIZE_HH)                \
    ? (PL_curcop->cop_features.bits[index] & (mask)) : FALSE)

/* The longest string we pass in.  */
#define MAX_FEATURE_LEN (sizeof("bareword_filehandles")-1)

#define FEATURE_FC_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_515 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_FC_INDEX, FEATURE_FC_BIT)) \
    )

#define FEATURE_ALL_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_ALL_INDEX, FEATURE_ALL_BIT) \
    )

#define FEATURE_ANY_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_ANY_INDEX, FEATURE_ANY_BIT) \
    )

#define FEATURE_ISA_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_535 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_ISA_INDEX, FEATURE_ISA_BIT)) \
    )

#define FEATURE_SAY_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_510 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_SAY_INDEX, FEATURE_SAY_BIT)) \
    )

#define FEATURE_TRY_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_539 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_TRY_INDEX, FEATURE_TRY_BIT)) \
    )

#define FEATURE_CLASS_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_CLASS_INDEX, FEATURE_CLASS_BIT) \
    )

#define FEATURE_DEFER_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_DEFER_INDEX, FEATURE_DEFER_BIT) \
    )

#define FEATURE_STATE_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_510 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_STATE_INDEX, FEATURE_STATE_BIT)) \
    )

#define FEATURE_SWITCH_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_510 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_527) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_SWITCH_INDEX, FEATURE_SWITCH_BIT)) \
    )

#define FEATURE_BITWISE_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_527 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_BITWISE_INDEX, FEATURE_BITWISE_BIT)) \
    )

#define FEATURE_INDIRECT_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_527 \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_INDIRECT_INDEX, FEATURE_INDIRECT_BIT)) \
    )

#define FEATURE_EVALBYTES_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_515 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_EVALBYTES_INDEX, FEATURE_EVALBYTES_BIT)) \
    )

#define FEATURE_SIGNATURES_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_535 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_SIGNATURES_INDEX, FEATURE_SIGNATURES_BIT)) \
    )

#define FEATURE_SMARTMATCH_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_539 \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_SMARTMATCH_INDEX, FEATURE_SMARTMATCH_BIT)) \
    )

#define FEATURE___SUB___IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_515 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE___SUB___INDEX, FEATURE___SUB___BIT)) \
    )

#define FEATURE_MODULE_TRUE_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_537 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_MODULE_TRUE_INDEX, FEATURE_MODULE_TRUE_BIT)) \
    )

#define FEATURE_REFALIASING_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_REFALIASING_INDEX, FEATURE_REFALIASING_BIT) \
    )

#define FEATURE_POSTDEREF_QQ_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_523 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_POSTDEREF_QQ_INDEX, FEATURE_POSTDEREF_QQ_BIT)) \
    )

#define FEATURE_UNIEVAL_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_515 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_UNIEVAL_INDEX, FEATURE_UNIEVAL_BIT)) \
    )

#define FEATURE_MYREF_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_MYREF_INDEX, FEATURE_MYREF_BIT) \
    )

#define FEATURE_UNICODE_IS_ENABLED \
    ( \
	(CURRENT_FEATURE_BUNDLE >= FEATURE_BUNDLE_511 && \
	 CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_541) \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_UNICODE_INDEX, FEATURE_UNICODE_BIT)) \
    )

#define FEATURE_MULTIDIMENSIONAL_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_527 \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_MULTIDIMENSIONAL_INDEX, FEATURE_MULTIDIMENSIONAL_BIT)) \
    )

#define FEATURE_BAREWORD_FILEHANDLES_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_535 \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_BAREWORD_FILEHANDLES_INDEX, FEATURE_BAREWORD_FILEHANDLES_BIT)) \
    )

#define FEATURE_MORE_DELIMS_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_MORE_DELIMS_INDEX, FEATURE_MORE_DELIMS_BIT) \
    )

#define FEATURE_APOS_AS_NAME_SEP_IS_ENABLED \
    ( \
	CURRENT_FEATURE_BUNDLE <= FEATURE_BUNDLE_539 \
     || (CURRENT_FEATURE_BUNDLE == FEATURE_BUNDLE_CUSTOM && \
	 FEATURE_IS_ENABLED_MASK(FEATURE_APOS_AS_NAME_SEP_INDEX, FEATURE_APOS_AS_NAME_SEP_BIT)) \
    )


#define SAVEFEATUREBITS() \
    STMT_START {  \
        SAVEI32(PL_compiling.cop_features.bits[0]);  \
    } STMT_END

#define CLEARFEATUREBITS() \
    (PL_compiling.cop_features.bits[0] = 0)

#define FETCHFEATUREBITSHH(hh) S_fetch_feature_bits_hh(aTHX_ (hh))

#endif /* PERL_CORE or PERL_EXT */

#ifdef PERL_IN_OP_C
PERL_STATIC_INLINE void
S_enable_feature_bundle(pTHX_ SV *ver)
{
    SV *comp_ver = sv_newmortal();
    PL_hints = (PL_hints &~ HINT_FEATURE_MASK)
	     | (
		  (sv_setnv(comp_ver, 5.041),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_541 :
		  (sv_setnv(comp_ver, 5.039),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_539 :
		  (sv_setnv(comp_ver, 5.037),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_537 :
		  (sv_setnv(comp_ver, 5.035),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_535 :
		  (sv_setnv(comp_ver, 5.027),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_527 :
		  (sv_setnv(comp_ver, 5.023),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_523 :
		  (sv_setnv(comp_ver, 5.015),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_515 :
		  (sv_setnv(comp_ver, 5.011),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_511 :
		  (sv_setnv(comp_ver, 5.009005),
		   vcmp(ver, upg_version(comp_ver, FALSE)) >= 0)
			? FEATURE_BUNDLE_510 :
			  FEATURE_BUNDLE_DEFAULT
	       ) << HINT_FEATURE_SHIFT;
    /* special case */
    assert(PL_curcop == &PL_compiling);
    if (FEATURE_UNICODE_IS_ENABLED) PL_hints |=  HINT_UNI_8_BIT;
    else			    PL_hints &= ~HINT_UNI_8_BIT;
}
#endif /* PERL_IN_OP_C */

#if defined(PERL_IN_MG_C) || defined(PERL_IN_PP_CTL_C)

#define magic_sethint_feature(keysv, keypv, keylen, valsv, valbool) \
    S_magic_sethint_feature(aTHX_ (keysv), (keypv), (keylen), (valsv), (valbool))
PERL_STATIC_INLINE void
S_magic_sethint_feature(pTHX_ SV *keysv, const char *keypv, STRLEN keylen,
                        SV *valsv, bool valbool) {
    if (keysv)
      keypv = SvPV_const(keysv, keylen);

    if (memBEGINs(keypv, keylen, "feature_")) {
        const char *subf = keypv + (sizeof("feature_")-1);
        U32 mask = 0;
        int index = 0;
        switch (*subf) {
        case '_':
            if (keylen == sizeof("feature___SUB__")-1
                 && memcmp(subf+1, "_SUB__", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE___SUB___BIT;
                index = FEATURE___SUB___INDEX;
                break;
            }
            return;

        case 'a':
            if (keylen == sizeof("feature_all")-1
                 && memcmp(subf+1, "ll", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_ALL_BIT;
                index = FEATURE_ALL_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_any")-1
                 && memcmp(subf+1, "ny", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_ANY_BIT;
                index = FEATURE_ANY_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_apos_as_name_sep")-1
                 && memcmp(subf+1, "pos_as_name_sep", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_APOS_AS_NAME_SEP_BIT;
                index = FEATURE_APOS_AS_NAME_SEP_INDEX;
                break;
            }
            return;

        case 'b':
            if (keylen == sizeof("feature_bareword_filehandles")-1
                 && memcmp(subf+1, "areword_filehandles", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_BAREWORD_FILEHANDLES_BIT;
                index = FEATURE_BAREWORD_FILEHANDLES_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_bitwise")-1
                 && memcmp(subf+1, "itwise", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_BITWISE_BIT;
                index = FEATURE_BITWISE_INDEX;
                break;
            }
            return;

        case 'c':
            if (keylen == sizeof("feature_class")-1
                 && memcmp(subf+1, "lass", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_CLASS_BIT;
                index = FEATURE_CLASS_INDEX;
                break;
            }
            return;

        case 'd':
            if (keylen == sizeof("feature_defer")-1
                 && memcmp(subf+1, "efer", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_DEFER_BIT;
                index = FEATURE_DEFER_INDEX;
                break;
            }
            return;

        case 'e':
            if (keylen == sizeof("feature_evalbytes")-1
                 && memcmp(subf+1, "valbytes", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_EVALBYTES_BIT;
                index = FEATURE_EVALBYTES_INDEX;
                break;
            }
            return;

        case 'f':
            if (keylen == sizeof("feature_fc")-1
                 && memcmp(subf+1, "c", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_FC_BIT;
                index = FEATURE_FC_INDEX;
                break;
            }
            return;

        case 'i':
            if (keylen == sizeof("feature_indirect")-1
                 && memcmp(subf+1, "ndirect", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_INDIRECT_BIT;
                index = FEATURE_INDIRECT_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_isa")-1
                 && memcmp(subf+1, "sa", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_ISA_BIT;
                index = FEATURE_ISA_INDEX;
                break;
            }
            return;

        case 'm':
            if (keylen == sizeof("feature_module_true")-1
                 && memcmp(subf+1, "odule_true", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_MODULE_TRUE_BIT;
                index = FEATURE_MODULE_TRUE_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_more_delims")-1
                 && memcmp(subf+1, "ore_delims", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_MORE_DELIMS_BIT;
                index = FEATURE_MORE_DELIMS_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_multidimensional")-1
                 && memcmp(subf+1, "ultidimensional", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_MULTIDIMENSIONAL_BIT;
                index = FEATURE_MULTIDIMENSIONAL_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_myref")-1
                 && memcmp(subf+1, "yref", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_MYREF_BIT;
                index = FEATURE_MYREF_INDEX;
                break;
            }
            return;

        case 'p':
            if (keylen == sizeof("feature_postderef_qq")-1
                 && memcmp(subf+1, "ostderef_qq", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_POSTDEREF_QQ_BIT;
                index = FEATURE_POSTDEREF_QQ_INDEX;
                break;
            }
            return;

        case 'r':
            if (keylen == sizeof("feature_refaliasing")-1
                 && memcmp(subf+1, "efaliasing", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_REFALIASING_BIT;
                index = FEATURE_REFALIASING_INDEX;
                break;
            }
            return;

        case 's':
            if (keylen == sizeof("feature_say")-1
                 && memcmp(subf+1, "ay", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_SAY_BIT;
                index = FEATURE_SAY_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_signatures")-1
                 && memcmp(subf+1, "ignatures", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_SIGNATURES_BIT;
                index = FEATURE_SIGNATURES_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_smartmatch")-1
                 && memcmp(subf+1, "martmatch", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_SMARTMATCH_BIT;
                index = FEATURE_SMARTMATCH_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_state")-1
                 && memcmp(subf+1, "tate", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_STATE_BIT;
                index = FEATURE_STATE_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_switch")-1
                 && memcmp(subf+1, "witch", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_SWITCH_BIT;
                index = FEATURE_SWITCH_INDEX;
                break;
            }
            return;

        case 't':
            if (keylen == sizeof("feature_try")-1
                 && memcmp(subf+1, "ry", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_TRY_BIT;
                index = FEATURE_TRY_INDEX;
                break;
            }
            return;

        case 'u':
            if (keylen == sizeof("feature_unicode")-1
                 && memcmp(subf+1, "nicode", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_UNICODE_BIT;
                index = FEATURE_UNICODE_INDEX;
                break;
            }
            else if (keylen == sizeof("feature_unieval")-1
                 && memcmp(subf+1, "nieval", keylen - sizeof("feature_")) == 0) {
                mask = FEATURE_UNIEVAL_BIT;
                index = FEATURE_UNIEVAL_INDEX;
                break;
            }
            return;

        default:
            return;
        }
        if (valsv ? SvTRUE(valsv) : valbool)
            PL_compiling.cop_features.bits[index] |= mask;
        else
            PL_compiling.cop_features.bits[index] &= ~mask;
    }
}
#endif /* PERL_IN_MG_C */

/* subject to change */
struct perl_feature_bit {
  const char *name;
  STRLEN namelen;
  U32 mask;
  int index;
};

#ifdef PERL_IN_PP_CTL_C

static const struct perl_feature_bit
PL_feature_bits[] = {
    {
        /* feature all */
        "feature_all",
        STRLENs("feature_all"),
        FEATURE_ALL_BIT,
        FEATURE_ALL_INDEX
    },
    {
        /* feature any */
        "feature_any",
        STRLENs("feature_any"),
        FEATURE_ANY_BIT,
        FEATURE_ANY_INDEX
    },
    {
        /* feature apostrophe_as_package_separator */
        "feature_apos_as_name_sep",
        STRLENs("feature_apos_as_name_sep"),
        FEATURE_APOS_AS_NAME_SEP_BIT,
        FEATURE_APOS_AS_NAME_SEP_INDEX
    },
    {
        /* feature bareword_filehandles */
        "feature_bareword_filehandles",
        STRLENs("feature_bareword_filehandles"),
        FEATURE_BAREWORD_FILEHANDLES_BIT,
        FEATURE_BAREWORD_FILEHANDLES_INDEX
    },
    {
        /* feature bitwise */
        "feature_bitwise",
        STRLENs("feature_bitwise"),
        FEATURE_BITWISE_BIT,
        FEATURE_BITWISE_INDEX
    },
    {
        /* feature class */
        "feature_class",
        STRLENs("feature_class"),
        FEATURE_CLASS_BIT,
        FEATURE_CLASS_INDEX
    },
    {
        /* feature current_sub */
        "feature___SUB__",
        STRLENs("feature___SUB__"),
        FEATURE___SUB___BIT,
        FEATURE___SUB___INDEX
    },
    {
        /* feature declared_refs */
        "feature_myref",
        STRLENs("feature_myref"),
        FEATURE_MYREF_BIT,
        FEATURE_MYREF_INDEX
    },
    {
        /* feature defer */
        "feature_defer",
        STRLENs("feature_defer"),
        FEATURE_DEFER_BIT,
        FEATURE_DEFER_INDEX
    },
    {
        /* feature evalbytes */
        "feature_evalbytes",
        STRLENs("feature_evalbytes"),
        FEATURE_EVALBYTES_BIT,
        FEATURE_EVALBYTES_INDEX
    },
    {
        /* feature extra_paired_delimiters */
        "feature_more_delims",
        STRLENs("feature_more_delims"),
        FEATURE_MORE_DELIMS_BIT,
        FEATURE_MORE_DELIMS_INDEX
    },
    {
        /* feature fc */
        "feature_fc",
        STRLENs("feature_fc"),
        FEATURE_FC_BIT,
        FEATURE_FC_INDEX
    },
    {
        /* feature indirect */
        "feature_indirect",
        STRLENs("feature_indirect"),
        FEATURE_INDIRECT_BIT,
        FEATURE_INDIRECT_INDEX
    },
    {
        /* feature isa */
        "feature_isa",
        STRLENs("feature_isa"),
        FEATURE_ISA_BIT,
        FEATURE_ISA_INDEX
    },
    {
        /* feature module_true */
        "feature_module_true",
        STRLENs("feature_module_true"),
        FEATURE_MODULE_TRUE_BIT,
        FEATURE_MODULE_TRUE_INDEX
    },
    {
        /* feature multidimensional */
        "feature_multidimensional",
        STRLENs("feature_multidimensional"),
        FEATURE_MULTIDIMENSIONAL_BIT,
        FEATURE_MULTIDIMENSIONAL_INDEX
    },
    {
        /* feature postderef_qq */
        "feature_postderef_qq",
        STRLENs("feature_postderef_qq"),
        FEATURE_POSTDEREF_QQ_BIT,
        FEATURE_POSTDEREF_QQ_INDEX
    },
    {
        /* feature refaliasing */
        "feature_refaliasing",
        STRLENs("feature_refaliasing"),
        FEATURE_REFALIASING_BIT,
        FEATURE_REFALIASING_INDEX
    },
    {
        /* feature say */
        "feature_say",
        STRLENs("feature_say"),
        FEATURE_SAY_BIT,
        FEATURE_SAY_INDEX
    },
    {
        /* feature signatures */
        "feature_signatures",
        STRLENs("feature_signatures"),
        FEATURE_SIGNATURES_BIT,
        FEATURE_SIGNATURES_INDEX
    },
    {
        /* feature smartmatch */
        "feature_smartmatch",
        STRLENs("feature_smartmatch"),
        FEATURE_SMARTMATCH_BIT,
        FEATURE_SMARTMATCH_INDEX
    },
    {
        /* feature state */
        "feature_state",
        STRLENs("feature_state"),
        FEATURE_STATE_BIT,
        FEATURE_STATE_INDEX
    },
    {
        /* feature switch */
        "feature_switch",
        STRLENs("feature_switch"),
        FEATURE_SWITCH_BIT,
        FEATURE_SWITCH_INDEX
    },
    {
        /* feature try */
        "feature_try",
        STRLENs("feature_try"),
        FEATURE_TRY_BIT,
        FEATURE_TRY_INDEX
    },
    {
        /* feature unicode_eval */
        "feature_unieval",
        STRLENs("feature_unieval"),
        FEATURE_UNIEVAL_BIT,
        FEATURE_UNIEVAL_INDEX
    },
    {
        /* feature unicode_strings */
        "feature_unicode",
        STRLENs("feature_unicode"),
        FEATURE_UNICODE_BIT,
        FEATURE_UNICODE_INDEX
    },
    { NULL, 0, 0U, 0 }
};

PERL_STATIC_INLINE void
S_fetch_feature_bits_hh(pTHX_ HV *hh) {
    CLEARFEATUREBITS();

    const struct perl_feature_bit *fb = PL_feature_bits;
    while (fb->name) {
        SV **svp = hv_fetch(hh, fb->name, (I32)fb->namelen, 0);
        if (svp && SvTRUE(*svp))
               PL_compiling.cop_features.bits[fb->index] |= fb->mask;
        ++fb;
    }
}

#endif /* PERL_IN_PP_CTL_C */

#ifdef PERL_IN_DUMP_C

#define ANY_FEATURE_BITS_SET(cop)  \
    (                              \
      cop->cop_features.bits[0]    \
    )

#define DUMP_FEATURE_BITS(file, cop) \
    STMT_START { \
        PerlIO_printf(file, "0x%" U32xf, cop->cop_features.bits[0]); \
    } STMT_END

#endif /* PERL_IN_DUMP_C */

#endif /* PERL_FEATURE_H_ */

/* ex: set ro ft=c: */