2764 lines
874 KiB
Plaintext
2764 lines
874 KiB
Plaintext
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rust
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è¥
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#rustc 1.96.0 (ac68faa20 2026-05-25)ÁíàÄTËŸ ÜJîÄ)'ß\¥! -3d1337db07d0b3aeÁ ¤²XctÔ'ÐÓ©z¨É½Ó -a4945860e1c53b00Á ¤°ð ¾ä-±($²ï=©Ã -7e98a21bfd32b0edÁ‰ À ö ‚ $Õ ReadmeDoctestsÁtÂ Ý < ¦TÊ» nightlyÁœ§
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AllocErrorÁT)‚ $ innerÁ,½»óœ£Ÿ,²» allocator-api2ÁÔ�R\\:» default-hasherÁÔR‘4G»èR RandomStateÁ\d»è24R
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DefaultHasherÁlö»èÔ½R forward_writesÁtê»èÔÀS„TŸ‚ $†S test_mapÁD¿¶ ‚ $´¶ ‘ likelyÁ4Œ»óœT‘ûD”»ó— rayonÁ,)»ÙŒ— serdeÁ,N»óŒ6˜
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equivalentÁTµ?» raw-entryÁ¬�?˜ŠD¥Ô ‚ $šÔ ˜ test_map_with_mmap_allocationsÁôÏô ‚ $‡ô raw_entryÁLê »£¬Î rustc_entryÁ\
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» rustc-internal-apiÁôû ¡ test_setÁD÷Ä‚ $ìĵ testsÁ,¡’ ‚ $–’ °l· »èÔƒ —Ù,Ž »ÙŒ– ™Ù,Ò »ÙŒÚ ›Ù,ž »ÙŒ¤
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EquivalentÁTü »�´Ï 1µ$ü
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ðµ2ìôÍìõËɵ ÆÄ 쀿ðà ½íÎ µµ ³±¯ »ó_쾬𳪵 ¨¦¤¡ž í stdallocÁ macrosÁ cfg_ifÁ ¦ ¤ Ÿ AllocatorÁ allocateÁ
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deallocateÁ Ð ß > do_allocÁ ’ controlÁ bitmaskÁ # remove_lowest_bitÁ # any_bit_setÁ # lowest_set_bitÁ # trailing_zerosÁ # nonzero_trailing_zerosÁ #
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leading_zerosÁ *› * IntoIterÁ *ê .› .ó groupÁ 1 11111 tagÁ 8 888 < EMPTYÁ < DELETEDÁ < is_fullÁ <
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is_specialÁ < special_is_emptyÁ <… B MIN_HASH_LENÁ 8D× 8 TagSliceExtÁ F fill_tagÁ F
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fill_emptyÁ 8IÓ hasherÁ @ S SSSSSSSSS S
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S S S
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SSSSSSSSSSSSSS offset_fromÁ o¥ S q capacity_overflowÁ q alloc_errÁ S SizedTypePropertiesÁ t
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IS_ZERO_SIZEDÁ t
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NEEDS_DROPÁ Sw¥ S h1Á Sz move_nextÁ S capacity_to_bucketsÁ S 'ensure_bucket_bytes_at_least_ctrl_alignÁ S bucket_mask_to_capacityÁ Sæ €¥ calculate_layout_forÁ S BucketÁ ƒ¥ ƒµ S†¥ Sˆ¥ ˆƒ S‹¥ ‹ from_base_indexÁ ‹
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to_base_indexÁ ‹ as_ptrÁ ‹ as_non_nullÁ ‹ next_nÁ ‹ã ‹ readÁ ‹ writeÁ ‹É • 'aÁ ‹ as_mutÁ —§ S RawTableÁ ™¥ ™’ ™ tableÁ ™¤ ™Ú S
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RawTableInnerÁ Ÿ bucket_maskÁ Ÿ ctrlÁ Ÿ growth_leftÁ Ÿ itemsÁ S¤¥ ¤æ ¤
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with_capacityÁ S¨¥ ¨’ ¨ TABLE_LAYOUTÁ ¨ new_inÁ ¨ new_uninitializedÁ ¨ with_capacity_inÁ ¨¨ ¨ data_endÁ ¨ allocation_sizeÁ ¨ bucket_indexÁ ¨ bucketÁ ¨
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erase_no_dropÁ ¨ eraseÁ ¨ removeÁ ¨
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remove_taggedÁ ¨ remove_entryÁ ¸ impl FnMut(&T) -> boolÁ ¨
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clear_no_dropÁ ¨ clearÁ » ¨ shrink_toÁ ½ impl Fn(&T) -> u64Á ¨ reserveÁ ¿æ ¨ try_reserveÁ Áæ ¨ reserve_rehashÁ Ãæ à à ¨ resizeÁ Çæ Ç ¨ insertÁ Êæ ¨ insert_entryÁ Ìæ ¨ replace_bucket_withÁ Η ¨ find_or_find_insert_indexÁ Ð� Ðæ Ð ¨ insert_at_indexÁ ¨ insert_tagged_at_indexÁ ¨ findÁ Ö� Ö ¨ getÁ Ù� ¨ get_mutÁ Û� ¨
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get_bucketÁ ¨ get_bucket_mutÁ ¨ checked_bucketÁ ¨ get_disjoint_mutÁ àŸ à à impl FnMut(usize, &T) -> boolÁ à à å ¨ get_disjoint_unchecked_mutÁ çŸ ç çÛ ç ç ì ¨ get_disjoint_mut_pointersÁ îŸ î îÛ î î ó ó ¨ capacityÁ ¨‘ ¨ is_emptyÁ ¨ num_bucketsÁ ¨ is_bucket_fullÁ ¨ù ¨ iter_hashÁ ¨ iter_hash_bucketsÁ ¨ full_buckets_indicesÁ ¨ drainÁ ¨ drain_iter_fromÁ ¨ into_iter_fromÁ ¨ into_allocationÁ S ƒ¥ ƒ’ S
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†¥ †’ S ‰ NEWÁ ‰æ S prev_pow2Á S maximum_buckets_inÁ S Žµ �’ Ž fallible_with_capacityÁ ‘’ ‘ Žê ”’ Ž fix_insert_indexÁ Ž find_insert_index_in_groupÁ Ž find_or_find_insert_index_innerÁ Ž prepare_insert_indexÁ Ž find_insert_indexÁ Ž
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find_innerÁ Ž prepare_rehash_in_placeÁ Žù �¥ Ž
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drop_elementsÁ Ÿ¥ Ž drop_inner_tableÁ ¡¥ ¡’ Ž© ¤¥ Ž
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bucket_ptrÁ Žî §¥ Ž probe_seqÁ Ž record_item_insert_atÁ Ž is_in_same_groupÁ « Ž
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set_ctrl_hashÁ Ž replace_ctrl_hashÁ Ž set_ctrlÁ Žª Ž
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ctrl_sliceÁ ŽÇ ŽÚ Ž num_ctrl_bytesÁ Ž is_empty_singletonÁ Ž prepare_resizeÁ ¶§ ¶’ ¶ ¶ Ž reserve_rehash_innerÁ »’ Ž¢! Ž resize_innerÁ ¾’ Ž rehash_in_placeÁ À Ž free_bucketsÁ Â’ Ž allocation_infoÁ Ž allocation_size_or_zeroÁ Ž® ŽÌ S
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È¥ È’ ȃ Ȇ Ì S
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RawTableCloneÁ Î clone_from_specÁ SÐ¥ Ð’ SÓ¥ Ó’ Ó clone_from_implÁ Ö SØ¥ Ø’ Ø> SÜ¥ Ü’ Üã Sà¥ à’ à› àæ àê S RawIterRangeÁ æ¥ æ
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current_groupÁ æ dataÁ æ next_ctrlÁ æþ Sì¥ ìæ ì next_implÁ ï DO_CHECK_PTR_RANGEÁ ì fold_implÁ ñ— ñ“ Sô¥ Sö¥ Sø¥ øƒ Sû¥ û› ûó þ û size_hintÁ S�¥ S RawIterÁ ƒ¥ ƒù ƒÉ S‡¥ ‡�% SŠ¥ Šƒ S�¥ �> S �¥ �› �ó “ �ê- � foldÁ –“ –— S ™¥ S ›¥ S �> S ŸÑ, S!¡› ¡ó ¡ê- S"S#S RawIntoIterÁ §¥ §’ §ù §
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allocationÁ §Ú S$¥ ’ ù S%±¥ ±’ S&´¥ ´’ S'·¥ ·’ ·ã S(»¥ »’ »> S)¿¥ ¿’ ¿› ¿ó ¿ê- S*Å¥ Å’ S+È¥ È’ S RawDrainÁ ˧ Ë¥ Ë’ Ëù Ëæ Ë
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orig_tableÁ ËÚ S,Ó¥ Ó’ Óù S-×¥ ×’ S.Ú¥ Ú’ S/Ý¥ Ý’ Ýã S0ᥠᒠᛠáó áê- S1ç¥ ç’ S2ê¥ ê’ S RawIterHashÁ í¥ íŸ í _markerÁ S3ñ¥ ñæ ó’ S4õ¥ õƒ S5ø¥ ø> S6û> S7ýæ S8ÿ¥ ÿ› ÿó S9ƒ› ƒó S RawExtractIfÁ †§ †¥ †’ †ù †æ S:Œ¥ Œ’ Œó �— utilÁ ‘› ‘¨ ‘û ‘ invalid_mutÁ •¥ external_trait_implsÁ Ø ˜ ˜˜˜˜˜˜˜˜˜ ˜
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˜ ˜ ˜
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˜˜˜˜˜˜˜˜˜˜˜˜˜� ³œ ³§ ³¤ ³’ ³ hash_builderÁ ³æ ˜ ºœ º§ º¤ º’ ºƒ º† ˜ make_hasherÁ Á¢ Á§ Á¤ Á Á ˜ equivalent_keyÁ Ç¢ Çœ ǧ Ç Ç ˜ make_hashÁ Í¢ ͤ ˜Ðœ Ч Ф Ð with_hasherÁ Ð with_capacity_and_hasherÁ ˜Öœ Ö§ Ö¤ Ö’ Ö¨ Ö with_hasher_inÁ Ö with_capacity_and_hasher_inÁ Öš ÖŸ Ö keysÁ Ö¼ Ö
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values_mutÁ Öù Öú Ö‘ Ö· Ö¾! Ö retainÁ è— Ö
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extract_ifÁ ê— ÖÃ Ö into_keysÁ Ö into_valuesÁ ˜ïœ ï§ ï¤ ï’ ï€ ï— ï
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shrink_to_fitÁ ïÕ ï entryÁ ï entry_refÁ ù§ ù 'bÁ ù¢ ïÎ ý¢ ï
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get_key_valueÁ ÿ¢ ï get_key_value_mutÁ �¢ ï contains_keyÁ ƒ¢ ïá …¢ ï¶ ‡¢ ‡Ÿ ‡ ‡ ‡ Œ ï get_many_mutÁ Ž¢ ŽŸ Ž Ž ï� “¢ “Ÿ “ “ “ ˜ ï get_many_unchecked_mutÁ š¢ šŸ š š ï get_disjoint_key_value_mutÁ Ÿ¢ ŸŸ Ÿ Ÿ Ÿ ¤ ï get_many_key_value_mutÁ ¦¢ ¦Ÿ ¦ ¦ ï $get_disjoint_key_value_unchecked_mutÁ «¢ «Ÿ « « « ° ï get_many_key_value_unchecked_mutÁ ²¢ ²Ÿ ² ² ï get_disjoint_mut_innerÁ ·¢ ·Ÿ · · · ï get_disjoint_unchecked_mut_innerÁ ½¢ ½Ÿ ½ ½ ½ ï build_hashes_innerÁ â ß à à à ïõ ï insert_unique_uncheckedÁ ï
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try_insertÁ ï٠̢ ïü ΢ ïþ ˜Ñœ ѧ Ѥ Ñ’ Ñ� Ö × ˜Ùœ Ù§ Ù¤ Ù’ ˜Þœ Þ§ Þ¤ Þ’ Þ× ˜äœ ä§ ä¤ ä’ ä> ˜êœ ê¢ ê§ ê¤ ê’ ê° êÖ ˜ IterÁ ò§ òœ ò§ òŸ òÚ ˜ øœ ø§ øƒ ˜
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üœ ü§ ü× ˜ IterMutÁ €§ €œ €§ €Ÿ €Ú ˜ †œ †§ ˜ ‰œ ‰§ ‰ù ˜æ �œ �§ �’ �Ÿ ˜
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’œ ’§ ’’ ’ù ˜ IntoKeysÁ —œ —§ —’ —Ÿ ˜œœ œ§ œ’ œ> ˜¡œ ¡§ ¡’ ¡› ¡ó ¦ ¡ê- ¡‘/ ©“ ©— © ˜œ § ’ ‘ ˜²œ ²§ ²’ ˜¶œ ¶§ ¶’ ¶× º ˜
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IntoValuesÁ ¼œ ¼§ ¼’ ¼Ÿ ˜Áœ Á§ Á’ Á> ˜Æœ Ƨ Æ’ Æ› Æó Ë Æê- Æ‘/ Γ Η Î ˜Òœ Ò§ Ò’ Ò‘ ˜×œ ק ×’ ˜Ûœ Û§ Û’ Û× ß ˜ KeysÁ ᧠ᜠ᧠០˜æœ æ§ æƒ ˜êœ ê§ ê× ˜ ValuesÁ î§ îœ î§ îŸ ˜óœ ó§ óƒ ˜÷œ ÷§ ÷× ˜ DrainÁ û§ ûœ û§ û’ ûŸ ˜ �œ �§ �’ �ù ˜ ExtractIfÁ †§ †œ †§ †— †’ †± †Ÿ ˜ Žœ Ž§ Ž— Ž’ Ž› Žó ” Žê- ˜ —œ —§ —— ˜ ValuesMutÁ ›§ ›œ ›§ ›Ÿ ˜ EntryÁ § œ § ¤ ’ OccupiedÁ ¦
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¦ˆ VacantÁ ©
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åˆ ˜$èœ è¢ è§ è¤ è’ è× ˜ VacantEntryRefÁ ï 'mapÁ ï 'keyÁ ïœ ï¢ ï§ ï¤ ï’ ï§ ïïT ïæ ˜%úœ ú¢ ú§ ú¤ ú’ ú× ˜
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OccupiedErrorÁ �§ �œ �§ �¤ �’ �Ý= �» ˜&‰œ ‰§ ‰¤ ‰’ ‰× ˜'�œ �§ �¤ �’ �× ˜(•§ •œ •§ •¤ •’ •› •æ •ê ˜)ž§ žœ ž§ ž¤ ž’ ž› žæ žê ˜*§œ §§ §¤ §’ §› §æ §ê ˜+¯œ ¯§ ¯> ˜,³§ ³œ ³§ ³› ³ó ³ê- ³‘/ º“ º— º ˜-¾œ ¾§ ¾‘ ˜.Âœ § ˜/Åœ ŧ Å> ˜0ɧ Éœ ɧ É› Éó Éê- É‘/ Г З Ð ˜1Ôœ Ô§ Ô‘ ˜2Øœ ا ˜3Ûœ Û§ Û× ˜4ßœ ߧ ß’ ß> ˜5äœ ä§ ä’ ä› äó äê- ä‘/ ë“ ë— ˜6îœ î§ î’ î‘ ˜7óœ ó§ ó’ ˜8÷œ ÷§ ÷’ ÷× ˜9üœ ü§ ü> ˜:€ § € œ € § € › € ó € ê- € ‘/ ‡ “ ‡ — ‡ ˜;‹ œ ‹ § ‹ ‘ ˜<� œ � § ˜=’ œ ’ § ’ > ˜>– § – œ – § – › – ó – ê- – ‘/ � “ � — � ˜?¡ œ ¡ § ¡ ‘ ˜@¥ œ ¥ § ˜A¨ œ ¨ § ¨ > ˜B¬ § ¬ œ ¬ § ¬ › ¬ ó ¬ ê- ¬ ‘/ ³ “ ³ — ³ ˜C· œ · § · ‘ ˜D» œ » § ˜E¾ œ ¾ § ¾ × Á ˜Fà œ à § à ’ à › à ó à ê- à ‘/ Ê “ Ê — ˜GÍ œ Í § Í ’ Í ‘ ˜HÒ œ Ò § Ò ’ ˜IÖ œ Ö § Ö ’ Ö × ˜JÛ § Û œ Û § Û ¤ Û ’ Û õ Û or_insertÁ Û or_insert_entryÁ Û or_insert_withÁ ä — Û or_insert_with_keyÁ æ — Û ïT Û
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and_modifyÁ é — Û and_replace_entry_withÁ ë — Û into_mapÁ ˜Kî § î œ î § î ¤ î ’ î
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Ù48 ƒ ˜ �’2D@ Ë ˜ žÒ5dJ † ˜ Ÿÿ/\X § ˜ †.<e ƒ ˜ ¡ÆDn ™ ˜ ¢»¸”… î ˜ ¤ –æT™ ˜ ¥ø»|¥ › ˜ ¦Y4É ˜ §×$á ` ˜ ©p,ç ¿c ˜ ªp Âc ˜ ª\\€ Åe ˜ ¬Ž$� še ˜ Ž e ˜ �ºl¤ òP ˜ ®ªÓ\Å • ˜ ¯ªÓ – ˜ ¯í Ü ë ˜ ° IndexÁ,ð Ù¢ ˜ ± ToOwnedÁ<� ² ˜ ²d "T+çêÙÜËνÀ¯²¡¤,}•˜‚…ru¤»hLÕZ ÛMPTó03!$̷̘òLÖÍ„å¹Ìû¢ü»2G üÓB ? A hash map implemented with quadratic probing and SIMD lookup.Á –ú üšK H The default hashing algorithm is currently [`foldhash`], though this isÁ üæL I subject to change at any point in the future. This hash function is veryÁ ü³O L fast for all types of keys, but this algorithm will typically *not* protectÁ üƒ$ ! against attacks such as HashDoS.Á ¨ú ü¬L I The hashing algorithm can be replaced on a per-`HashMap` basis using theÁ üùP M [`default`], [`with_hasher`], and [`with_capacity_and_hasher`] methods. ManyÁ üÊQ N alternative algorithms are available on crates.io, such as the [`fnv`] crate.Á œú ü S P It is required that the keys implement the [`Eq`] and [`Hash`] traits, althoughÁ üôN K this can frequently be achieved by using `#[derive(PartialEq, Eq, Hash)]`.Á üà G D If you implement these yourself, it is important that the followingÁ œ‹
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F C In other words, if two keys are equal, their hashes must be equal.Á § ú ü« M J It is a logic error for a key to be modified in such a way that the key'sÁ üù P M hash, as determined by the [`Hash`] trait, or its equality, as determined byÁ üÊ K H the [`Eq`] trait, changes while it is in the map. This is normally onlyÁ ü–
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O L It is also a logic error for the [`Hash`] implementation of a key to panic.Á ü¹N K This is generally only possible if the trait is implemented manually. If aÁ üˆP M panic does occur then the contents of the `HashMap` may become corrupted andÁ üÙ- * some items may be dropped from the table.Á ‡ú t‹ # ExamplesÁ šú <žâÇ Ü¦ use hashbrown::HashMap;Á Âú üÆD A // Type inference lets us omit an explicit type signature (whichÁ ü‹; 8 // would be `HashMap<String, String>` in this example).Á üÇ* ' let mut book_reviews = HashMap::new();Á òú Ìö // Review some books.Á Ä� book_reviews.insert(Á ü©5 2 "Adventures of Huckleberry Finn".to_string(),Á üß( % "My favorite book.".to_string(),Á 4ˆ );Á Ä�çÐ ü¨* ' "Grimms' Fairy Tales".to_string(),Á üÓ# "Masterpiece.".to_string(),Á 4÷ùÑ ÄþçÐ ü—* ' "Pride and Prejudice".to_string(),Á üÂ& # "Very enjoyable.".to_string(),Á 4éùÑ ÄðçÐ ü‰8 5 "The Adventures of Sherlock Holmes".to_string(),Á üÂ) & "Eye lyked it alot.".to_string(),Á 4ìùÑ óú ü÷ // Check for a specific one.Á ü˜F C // When collections store owned values (String), they can still beÁ üß' $ // queried using references (&str).Á ü‡6 3 if !book_reviews.contains_key("Les Misérables") {Á ü¾H E println!("We've got {} reviews, but Les Misérables ain't one.",Á ü‡% " book_reviews.len());Á , }Á ³ú ü·I F // oops, this review has a lot of spelling mistakes, let's delete it.Á ü�= : book_reviews.remove("The Adventures of Sherlock Holmes");Á ¿ú üÃ4 1 // Look up the values associated with some keys.Á üøM J let to_find = ["Pride and Prejudice", "Alice's Adventure in Wonderland"];Á ÜÆ for &book in &to_find {Á üâ& # match book_reviews.get(book) {Á ü‰= : Some(review) => println!("{}: {}", book, review),Á üÇ7 4 None => println!("{} is unreviewed.", book)Á Lÿ }Á ,‰ ˆØ � ú ü“ H E // Look up the value for a key (will panic if the key is not found).Á üÜ I F println!("Review for Jane: {}", book_reviews["Pride and Prejudice"]);Á ¦ ú üª // Iterate over everything.Á üÊ ) & for (book, review) in &book_reviews {Á üô - * println!("{}: \"{}\"", book, review);Á ,¢ ˆØ <¨ âÇ ° ú ü´ K H `HashMap` also implements an [`Entry API`](#method.entry), which allowsÁ ü€ P M for more complex methods of getting, setting, updating and removing keys andÁ ŒÑ their values:Á ã ú <ç âÇ Üï ÂÎ ‹ ú ü� D A // type inference lets us omit an explicit type signature (whichÁ üÔ 5 2 // would be `HashMap<&str, u8>` in this example).Á üŠ!* ' let mut player_stats = HashMap::new();Á µ!ú ü¹!! fn random_stat_buff() -> u8 {Á üÛ!K H // could actually return some random value here - let's just returnÁ ü§"# // some fixed value for nowÁ TË" 42Á ,Ö"ˆØ Ü"ú üà"4 1 // insert a key only if it doesn't already existÁ ü•#0 - player_stats.entry("health").or_insert(100);Á Æ#ú üÊ#I F // insert a key using a function that provides a new value only if itÁ ä”$ // doesn't already existÁ ü±$C @ player_stats.entry("defence").or_insert_with(random_stat_buff);Á õ$ú üù$D A // update a key, guarding against the key possibly n
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*v = "b";Á üè×@ = assert_eq!(map.get_key_value_mut(&1), Some((&1, &mut "b")));Á üØ0 - assert_eq!(map.get_key_value_mut(&2), None);Á <âØâÇŒƒÙ € � €´ì �˽ ۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙ €ìì €òì ï¢ ‚ ‚ ˜Ù ï ä¾ •Ù ö¾$×Ù ‡¿lÞÙ
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�ììòìøìþì˽$�Ù¶ £ÙAC ü³á` üˆÝE B Returns `true` if the map contains a value for the specified key.Á ÒÝú üÚÝ?Å¿ üžÞC�À ŒæÞÜÀ üÞú t„ß’Î —ßú <ŸßâÇ Ü«ßÂÎ Ëßú üÓß!î² ¼ùß×Á ü•à+ ( assert_eq!(map.contains_key(&1), true);Á üÅà, ) assert_eq!(map.contains_key(&2), false);Á <öàâÇ dºá ‚ ƒ ‚´ì ƒË½ ï¢ „ „ Êá ï ä¾ Çá ö¾$õá ‡¿lüá
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ƒììòìøìþì˽$ËᶠÑáAC üßèi üôãF C Returns a mutable reference to the value corresponding to the key.Á ¿äú üÇä?Å¿ ü‹åC�À ŒÓåÜÀ éåú tñå’Î „æú <ŒæâÇ Ü˜æÂÎ ¸æú üÀæ!î² ¼ææ×Á ü‚ç& # if let Some(x) = map.get_mut(&1) {Á Œç *x = "b";Á ,ÃçˆØ ìÍç assert_eq!(map[&1], "b");Á ïçú ü÷ç& # assert_eq!(map.get_mut(&2), None);Á <¢èâÇ <æè „ … „´ì …˽ ۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙ „òì ï¢ † † ñè ï ä¾ îè ö¾$ªé ‡¿l±é
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…ììòìøìþì˽$öè¶ üèAC üÚû� üÆìH E Attempts to get mutable references to `N` values in the map at once.Á “íú ü›í] Z Returns an array of length `N` with the results of each query. For soundness, at most oneÁ üýí_ \ mutable reference will be returned to any value. `None` will be used if the key is missing.Á áîú dé úîú ü‚ï' $ Panics if any keys are overlapping.Á ®ïú t¶ï’Î Éïú <ÑïâÇ ÜÝïÂÎ ýïú ü…ð' $ let mut libraries = HashMap::new();Á ü±ð; 8 libraries.insert("Bodleian Library".to_string(), 1602);Á üñð4 1 libraries.insert("Athenæum".to_string(), 1807);Á üªñJ G libraries.insert("Herzogin-Anna-Amalia-Bibliothek".to_string(), 1691);Á üùñ> ; libraries.insert("Library of Congress".to_string(), 1800);Á ¼òú üÄò) & // Get Athenæum and Bodleian LibraryÁ üòò9 6 let [Some(a), Some(b)] = libraries.get_disjoint_mut([Á ¤°ó "Athenæum",Á ÜÉó "Bodleian Library",Á Ìéó ]) else { panic!() };Á ‡ôú ü�ô9 6 // Assert values of Athenæum and Library of CongressÁ üÍô* ' let got = libraries.get_disjoint_mut([Á ¤üôŠã ô•õ "Library of Congress",Á <¸õ ]);Á |Äõ assert_eq!(Á dØõ got,Á Léõ [Á ä÷õ Some(&mut 1807),Á ä˜ö Some(&mut 1800),Á T¹ö ],Á 4ÈöùÑ Óöú üÛö" // Missing keys result in NoneÁ ü‚÷*Âä ¤±÷Šã üÊ÷" "New York Public Library",Á <ñ÷¬å |ý÷½å d‘øÖå L¢øìå ä°øÿå „Ñø
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NoneÁ Læø ]Á 4ôøùÑ <ÿøâÇ ‹ùú œ“ù ```should_panicÁ Ü«ùÂÎ Ëùú üÓù'±ß üÿù4©à ¸úú äÀú // Duplicate keys panic!Á üáú*Âä ¤�ûŠã ¤©ûŠã <Âû¬å <ÎûâÇ„áû † ‡ †´ì ‡Ë½ ŸÛ¼Ý¼Þ¼© ß¼ à¼ÛἈ cSñŸ«‡zÙ †òì Ÿ ï¢ ˆ Ÿ ‰ ‰ ˆ …ü ï ä¾ òû Ÿ tõû ö¾$Ìü ‡¿lÓü
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ãììòìøìþì$ȇ± ·ü¸ˆb œ å § æ ¤ ç ’ è è æ ç å Òù ½ˆ ãù Àˆ ôù È …ú ƈ ³ øì <öˆ ³ þì <†‰ –úL�‰´ìé ´ é Z\ ^` bd fh ¤žŽ ü¡‰b _ Creates an empty `HashMap<K, V, S, A>`, with the `Default` value for the hasher and allocator.Á ˆŠú t�Š’Î £Šú <«ŠâÇ Ü·ŠÂÎ ü׊ use std::hash::RandomState;Á ûŠú üƒ‹L I // You can specify all types of HashMap, including hasher and allocator.Á üÔ‹5 2 // Created map is empty and don't allocate memoryÁ üŽŒ7 4 let map: HashMap<u32, String> = Default::default();Á üÊŒ"”” üñŒD A let map: HashMap<u32, String, RandomState> = HashMap::default();Á üº�"”” <á�âÇ <¡Ž ´ì ä ä
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éììòìøìþìüƒ�™ 8 © œ ë ¢ ì § í ¤ î ’ ï ì î ï í © ë ¶… ˆ� Îì’î ‹� Íìûí Ž� Íì�î ‘� Íì‡î ”� ™õí Æ� šeõí $Ë� še’î $Ø� ’îõí lß� Åe�î \þ� ‡î L’�½íðñ Û¢ Ü¢ ñ ÎÐ ÉË ÄÆ ¿Á º¼ \£�4¨� ê ê ûíô�” ü¹�G D Returns a reference to the value corresponding to the supplied key.Á …‘ú d�‘ƒ” ž‘ú ü¦‘6 3 Panics if the key is not present in the `HashMap`.Á á‘ú té‘’Î ü‘ú <„’âÇ Ü�’ÂÎ °’ú ü¸’A > let map: HashMap<_, _> = [("a", "One"), ("b", "Two")].into();Á þ’ú ü†“! assert_eq!(map[&"a"], "One");Á ü¬“! assert_eq!(map[&"b"], "Two");Á <Ò“âÇ ,’”€ ª « ª½í «’î ªûí ê ˜” ê
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ñ 8õí’îûí�î‡î$™”ïT Ÿ”ÌíŸ ü§™C @ An iterator over the entries of a `HashMap` in arbitrary order.Á üë™2�Ç žšú ü¢šK H This `struct` is created by the [`iter`] method on [`HashMap`]. See itsÁ Üîš documentation for more.Á Š›ú ÜŽ› [`iter`]: HashMap::iterÁ ª›ú t®›’Î ½›ú <Á›âÇ ÜÉ›ÂÎ å›ú üé›C @ let map: HashMap<_, _> = [(1, "a"), (2, "b"), (3, "c")].into();Á œú ô±œ let mut iter = map.iter();Á üÐœ> ; let mut vec = vec![iter.next(), iter.next(), iter.next()];Á ��ú ü“�DäÊ üØ�@³Ë Ä™ž‚· ü²žL I assert_eq!(vec, [Some((&1, &"a")), Some((&2, &"b")), Some((&3, &"c"))]);Á ÿžú ܃Ÿ // It is fused iteratorÁ üŸŸ" assert_eq!(iter.next(), None);Á üŸ"–† <åŸâÇ $øŸ § ó œ ô § õ õ ó ô ¶… � Ç… „ õí §ü© # ãî §êù ¶¨7g|�°ß ö÷ýŸOQ SU ´� ,� ˜ ò ò ƒ ƒ †. …ù †É S CHMr[t<Û€¦4© ˜ ò ò • • – ªÓ Fu\»Ÿ³€üˆ¡# 8 ¬ œ ù § ú ¬ ù ú ¶… �¡ Ç… �¡ îû Ù û !# ¼ã¡ ,æ¡ î î ø ì¡ ø
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ÿ 8õíãî$¬£± ²£ä⪠üž¤J G A mutable iterator over the entries of a `HashMap` in arbitrary order.Á üé¤6ªÏ ¥ú ü¤¥O L This `struct` is created by the [`iter_mut`] method on [`HashMap`]. See itsÁ Üô¥ß� �¦ú ü”¦# [`iter_mut`]: HashMap::iter_mutÁ ¸¦ú t¼¦’Π˦ú <ϦâÇ ÜצÂÎ ó¦ú ü÷¦S P let mut map: HashMap<_, _> = [(1, "One".to_owned()), (2, "Two".into())].into();Á ˧ú üϧ" let mut iter = map.iter_mut();Á üò§9 6 iter.next().map(|(_, v)| v.push_str(" Mississippi"));Á ü¬¨9ä‘ æ¨ú Üê¨ð… ü†©"–† ü©©"–† Ì©ú üЩD A assert_eq!(map.get(&1).unwrap(), &"One Mississippi".to_owned());Á ü•ªD A assert_eq!(map.get(&2).unwrap(), &"Two Mississippi".to_owned());Á <ÚªâÇ <íª § � œ ‚ § ƒ � ‚ ƒ ¶… ùª Ç… üª ¥ˆ üÏ«' ¶ˆ
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Œ 8õíãî$›¯üÕ·0 üŸ°J G An owning iterator over the entries of a `HashMap` in arbitrary order.Á üê°* ' The iterator element type is `(K, V)`.Á •±ú ü™±G D This `struct` is created by the [`into_iter`] method on [`HashMap`]Á üá±M J (provided by the [`IntoIterator`] trait). See its documentation for more.Á ü¯²5 2 The map cannot be used after calling that method.Á å²ú üé²% " [`into_iter`]: HashMap::into_iterÁ �³ú t“³’Î ¢³ú <¦³âÇ Ü®³ÂΠʳú üγCˆƒ ’´ú ü–´# let mut iter = map.into_iter();Á üº´>‹„ ù´ú üý´H E // The `IntoIter` iterator produces items in arbitrary order, so theÁ üƵ@³Ë 涂· ü ¶F C assert_eq!(vec, [Some((1, "a")), Some((2, "b")), Some((3, "c"))]);Á ç¶ú Üë¶ð… ü‡·"–† üª·"–† <Í·âÇ Dà· œ Ž § � ’ � � Ž � Òù é· ãù ì· §˜¬ï· ¹˜Lò·Êû ¥K@¬žú‚Ä ‘:< >@ B ï· öÜ ìŒ¸,Œ¸˜ � � § § ÿ/ ªù S «ª0 S ¬Ú S |ZnBiF”]�€”êü®¸* œ “ § ” ’ • ” • “ Òù ³¸ ãù ¶¸ §˜ ¹¸ ¹˜L¼¸Êû– ') +- /1 üÓ¹+ $á¹ µ µÊû ò ò íF öŸ ˜ ÷Ú ˜ ¶¨7g|�°ß µììòì ’ æ¹ ’
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–ììòì”ê$ç¹üØÁ0 üêºG D An owning iterator over the keys of a `HashMap` in arbitrary order.Á ü²»%ò… Ø»ú üÜ»H E This `struct` is created by the [`into_keys`] method on [`HashMap`].Á ü¥¼# See its documentation for more.Á üɼ5¦œ ÿ¼ú üƒ½% " [`into_keys`]: HashMap::into_keysÁ ©½ú t½’Î ¼½ú <À½âÇ ÜȽÂÎ ä½ú üè½Cˆƒ ¬¾ú ü°¾# let mut keys = map.into_keys();Á üÔ¾> ; let mut vec = vec![keys.next(), keys.next(), keys.next()];Á “¿ú ü—¿Gˆˆ üß¿?¹¶ ÄŸÀ‚· ü¸À1 . assert_eq!(vec, [Some(1), Some(2), Some(3)]);Á êÀú ÜîÀð… üŠÁ" assert_eq!(keys.next(), None);Á üÁ"èª <ÐÁâÇ DãÁ œ ˜ § ™ ’ š ˜ ™ š Òù ìÁ ãù ïÁ §˜¬òÁ ¹˜LõÁÊï žÂw]ûà ›:< >@ B òÁ öÜ Ä�Â,�˜ — — Êûü¬Â6 œ � § ž ’ Ÿ � Ÿ ž Òù ±Â ãù ´Â §˜ ·Â ¹˜LºÂÊï ´ /1 35 79 ¤šÃ <�à Êï œ œ
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ºììòì”ê$‚ʱ ˆÊD÷Ê º”è » è » Ëè » » º »ììòì”ê ŒìÞ• ü¯Ò2 ü£ËI F An owning iterator over the values of a `HashMap` in arbitrary order.Á üíË%‰‹ “Ìú ü—ÌJ G This `struct` is created by the [`into_values`] method on [`HashMap`].Á üâÌU R See its documentation for more. The map cannot be used after calling that method.Á ¸Íú ü¼Í) & [`into_values`]: HashMap::into_valuesÁ æÍú têÍ’Î ùÍú <ýÍâÇ Ü…ÎÂÎ ¡Îú ü¥ÎCˆƒ éÎú üíÎ' $ let mut values = map.into_values();Á ü•ÏD A let mut vec = vec![values.next(), values.next(), values.next()];Á ÚÏú üÞÏG � ü¦ÐEò� ÄìЂ· ü…Ñ7 4 assert_eq!(vec, [Some("a"), Some("b"), Some("c")]);Á ½Ñú ÜÁÑð… üÝÑ$ ! assert_eq!(values.next(), None);Á ü‚Ò$à <§ÒâÇ TºÒ œ ½ § ¾ ’ ¿ ¿ ½ ¾ Òù ÅÒ ãù ÈÒ §˜¬ËÒ ¹˜LÎÒ·ð …uRdÅv£ À:< >@ B ËÒ öÜ ÄèÒ,èÒ˜ ¼ ¼ Êûü…Ó8 œ  § à ’ Ä Ã Ä Â Òù ŠÓ ãù �Ó §˜ �Ó ¹˜L“Ó·ðÅ ´ Å /1 35 79 ¤õÓ <øÓ ·ð Á Á
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ßììòì”ê$ÞÚ± äÚDÓÛ ß”è à è à Ëè à à ß àììòì”ê Œì“ì ÌŸâ üÿÛ@ = An iterator over the keys of a `HashMap` in arbitrary order.Á üÀÜ)é± êÜú üîÜK H This `struct` is created by the [`keys`] method on [`HashMap`]. See itsÁ ܺÝß� ÖÝú ÜÚÝ [`keys`]: HashMap::keysÁ öÝú túÝ’Î ‰Þú <�ÞâÇ Ü•ÞÂÎ ±Þú üµÞCˆƒ ùÞú ôýÞ let mut keys = map.keys();Á üœß>�© Ûßú üßßCëµ ü£à?¹¶ Äãà‚· üüà4 1 assert_eq!(vec, [Some(&1), Some(&2), Some(&3)]);Á ±áú ܵáð… üÑá"èª üôá"èª <—ââÇ $ªâ § â œ ã § ä â ã ä ¶… ³â Ç… ¶â ¥ˆ ”) ¶ˆ ›)Âü ªåjNDÇž å¯â=? AC ¬¿â,¿â˜ á á êùü�ã# 8  œ ç § è  è ç ¶… •ã Ç… ˜ã¤ñé Ù é !# ¼ëã ,îã à äñ ¤ñ æ ôã æ
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é 8õíãî$õãüÎä/ 8 Ä œ ë § ì Ä ë ì ¶… Óä Ç… Ýä ÃŒ ,Öä¤ñí Àc í &( *, ü„å8 ‡å Å Æ Ç Å¤ñ Æ c c ˆ ¢cµ
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í 8õíãî$Œå± ’åÜÀì üþåB ? An iterator over the values of a `HashMap` in arbitrary order.Á üÁæ)ê¹ ëæú üïæM J This `struct` is created by the [`values`] method on [`HashMap`]. See itsÁ ܽçß� Ùçú üÝç [`values`]: HashMap::valuesÁ ýçú t�è’Î �èú <”èâÇ ÜœèÂÎ ¸èú ü¼èCˆƒ €éú ü„é" let mut values = map.values();Á ü§éDÈÁ ìéú üðéGþ¼ ü¸êAн Äúê‚· ü“ë: 7 assert_eq!(vec, [Some(&"a"), Some(&"b"), Some(&"c")]);Á Îëú ÜÒëð… üîë$à ü“ì$à <¸ìâÇ 4Ëì § ï œ ð § ñ ï ñ ð ¶… Öì Ç… Ùì ¥ˆ ê. ¶ˆ ñ.¦ý $úDP¢ÐÜ© òÒì=? AC ¬âì,âì˜ î î êùü³í% 8 È œ ô § õ õ ô È ¶… ¸í Ç… »íññö Ù ö !# ¼�î ,“î É Éññ ññ ó ™î ó
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ö 8õíãî$šîüõî1 8 Ê œ ø § ù ù ø Ê ¶… úî Ç… ýî ÔŒ ,€ïññú Àc ú &( *, üï8 °ï Ë Ì Í Ëññ Ì c c ˆ ¢cµ
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ú 8õíãî$µï± »ïü”÷1 ü§ðD A A draining iterator over the entries of a `HashMap` in arbitraryÁ üìð1 . order. The iterator element type is `(K, V)`.Á žñú ü¢ñL I This `struct` is created by the [`drain`] method on [`HashMap`]. See itsÁ Üïñß� ‹òú ì�ò [`drain`]: HashMap::drainÁ òú t±ò’Î Àòú <ÄòâÇ ÜÌòÂÎ èòú üìòG D let mut map: HashMap<_, _> = [(1, "a"), (2, "b"), (3, "c")].into();Á ´óú ü¸ó% " let mut drain_iter = map.drain();Á üÞóP M let mut vec = vec![drain_iter.next(), drain_iter.next(), drain_iter.next()];Á ¯ôú ü³ôE B // The `Drain` iterator produces items in arbitrary order, so theÁ üùô@³Ë ĺõ‚· üÓõFÊŸ šöú Üžöð… üºö( % assert_eq!(drain_iter.next(), None);Á üãö(Äð <Œ÷âÇ ,Ÿ÷ § ü œ ý § þ ’ ÿ þ ÿ ý ü ¶… ©÷ Ç… ¬÷ …ú¬¯÷ –úL²÷ ¥ˆ +- ¶ˆ 3- þì § B- û û �O €Ÿ ˜ Æ¢j—%Ä• §õíãîþì Æ¢j—%Ä• €¥÷œž ¢ ¤ ¯÷ öÜ ôÌ÷,Ì÷˜ û û Ë Ë ’2 Ïù S Ðæ S ÑÊ2 S ÒÚ S NìK
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… 8õíãîþì$©ùü½‚8 ü¬úU R A draining iterator over entries of a `HashMap` which don't satisfy the predicateÁ ü‚ûN K `f(&k, &mut v)` in arbitrary order. The iterator element type is `(K, V)`.Á Ñûú üÕûQ N This `struct` is created by the [`extract_if`] method on [`HashMap`]. See itsÁ ܧüß� Ãüú üÇü' $ [`extract_if`]: HashMap::extract_ifÁ ïüú tóü’Î ‚ýú <†ýâÇ ÜŽýÂÎ ªýú ü®ýL I let mut map: HashMap<i32, &str> = [(1, "a"), (2, "b"), (3, "c")].into();Á ûýú üÿý< 9 let mut extract_if = map.extract_if(|k, _v| k % 2 != 0);Á ü¼þ= : let mut vec = vec![extract_if.next(), extract_if.next()];Á úþú üþþI F // The `ExtractIf` iterator produces items in arbitrary order, so theÁ üÈÿ@³Ë ĉ€‚· ü¢€5 2 assert_eq!(vec, [Some((1, "a")),Some((3, "c"))]);Á Ø€ú ÜÜ€ð… üø€( % assert_eq!(extract_if.next(), None);Á ü¡�(Šþ ¬Ê� drop(extract_if);Á à�ú ìä� assert_eq!(map.len(), 1);Á <‚‚âÇ .üŠ‚2 "Iterators are lazy unless consumedÁ LÈ‚ § ‡ œ ˆ § ‰ — Š ’ ‹ ‡ ˆ Š ‹ ‰ ¶… Ö‚ Ç… Ù‚ ζ Ü‚ Íì‹ó ¬ß‚ ‹ó Lâ‚ ¥ˆ |' ¶ˆ „' ‹ó § “' † † éO Œ± ˜ �Ÿ ˜ t.™&Ð §õíãî…ó‹ó t.™&Ð Œ�Ò‚ÇÉ ËÍ ÏÑ Ê ß‚ öÜ $ü‚ ü‚˜ † † …óü†ƒ",†ƒ˜ † † † † Ò5 Šù ‹æ Ѷ'–¤Fr §Û€‹óüƒq 8 Ò œ � § � — ‘ ’ ’ ’ � Ò � ‘ Ð Ñ …ó Ðõí Ñãî˜" $‡„ Ç… µƒ ζ ¸ƒ É�
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L”„¾ò“”– úM ûM ÿM – ” /1 vx z| ~€ L¥„$ª„ Ž Ž Û€üï„( $ò„ Ó Ó¾òۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙ¾ò úM Ž ÷„ Ž
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” 8õíãî…ó‹ó$ü„̲… ””è • è • Ëè • • ” • õíãî…ó‹ó Û€ …óüõ…-Lø… Ô Ô¾ò Óû Ž ‚† Ž
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– 8õíãî…ó‹ó$ƒ†üÙ†Y 8 × œ ˜ § ™ — š ™ š × ˜ Õ Ö …ó Õõí Öãî˜" $®‡ Ç… ᆠζ ä† Õ Ö “"…ó’‹
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Ì™‡ ¶… Þ†˜ó GI KM ôù� ü·‡I F A mutable iterator over the values of a `HashMap` in arbitrary order.Á ü�ˆ-ñÀ ¯ˆú ü³ˆQ N This `struct` is created by the [`values_mut`] method on [`HashMap`]. See itsÁ Ü…‰ß� ¡‰ú ü¥‰' $ [`values_mut`]: HashMap::values_mutÁ ͉ú tщ’Î à‰ú <ä‰âÇ Üì‰ÂÎ ˆŠú üŒŠSÌ� àŠú üäŠ& # let mut values = map.values_mut();Á ü‹‹6 3 values.next().map(|v| v.push_str(" Mississippi"));Á ü‹6åŽ
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ù‹ú Üý‹ð… ü™Œ$à ü¾Œ$à ãŒú üçŒDý’ ü¬�DÌ“ <ñ�âÇ L„Ž § œ œ � § ž œ � ž ¶… ’Ž Ç… •Ž ¥ˆ þ= ¶ˆ >Áþ ýàƒ6 Ǽ ŸŽŽ=? AC ÄžŽ,žŽ˜ › › Úúü½™' ü»ŽP M A view into a single entry in a map, which may either be vacant or occupied.Á Œ�ú ü��H E This `enum` is constructed from the [`entry`] method on [`HashMap`].Á Ù�ú ìÝ� [`entry`]: HashMap::entryÁ û�ú tÿ�’Î Ž�ú <’�âÇ üš�= : use hashbrown::hash_map::{Entry, HashMap, OccupiedEntry};Á Ø�ú üÜ�!î² üþ�2 / map.extend([("a", 10), ("b", 20), ("c", 30)]);Á 챑ü³ Ï‘ú äÓ‘ // Existing key (insert)Á üð‘/ , let entry: Entry<_, _, _> = map.entry("a");Á ü ’9 6 let _raw_o: OccupiedEntry<_, _, _> = entry.insert(1);Á ìÚ’ü³ üø’ // Nonexistent key (insert)Á 옓 map.entry("d").insert(4);Á ¶“ú üº“ // Existing key (or_insert)Á üÚ“( % let v = map.entry("b").or_insert(2);Á üƒ”, ) assert_eq!(std::mem::replace(v, 2), 20);Á ü°”" // Nonexistent key (or_insert)Á üÓ” map.entry("e").or_insert(5);Á ô”ú üø”$ ! // Existing key (or_insert_with)Á ü�•0 - let v = map.entry("c").or_insert_with(|| 3);Á üΕ, ) assert_eq!(std::mem::replace(v, 3), 30);Á üû•' $ // Nonexistent key (or_insert_with)Á ü£–( % map.entry("f").or_insert_with(|| 6);Á Ì–ú üЖ' $ println!("Our HashMap: {:?}", map);Á ø–ú üü–F C let mut vec: Vec<_> = map.iter().map(|(&k, &v)| (k, v)).collect();Á ü×DäÊ üˆ˜@³Ë Äɘ‚· üâ˜R O assert_eq!(vec, [("a", 1), ("b", 2), ("c", 3), ("d", 4), ("e", 5), ("f", 6)]);Á <µ™âÇ ,Æ™ § ¡ œ ¢ § £ ¤ ¤ ’ ¥ ¢ ¤ ¥ £ ¡ ¶… Й Ç… Ó™ ÍìÃô Ö™ É�
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¦ §÷Q ¨ˆ © ª”R «ˆ Þ`ÿú¨?˜ §õíãîÃô‹ó Þ`ÿú¨?˜¦§©ª § ¨ ² ² ÜR ¸§ ˜ ¹¡S ˜ ºæ ˜ £Ü,·s6ú §õíãîÃô‹ó³
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ª « Ë Ë ¬T ѧ ˜ ÒïT ˜ Óæ ˜ Ñ!ÊSÂò+ §õíãîÃô‹ó³
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Ì™«® ±´ ®± ´ Ù™ öÜ · ´ƒš An occupied entry.Á žšú t¦š’Î ¹šú <ÁšâÇ üÍš. + use hashbrown::hash_map::{Entry, HashMap};Á ü€›A > let mut map: HashMap<_, _> = [("a", 100), ("b", 200)].into();Á Æ›ú ÔΛ match map.entry("a") {Á üí›+ ( Entry::Vacant(_) => unreachable!(),Á ü�œ! Entry::Occupied(_) => { }Á ,ÃœˆØ <ÍœâÇ ·
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¸ œ‡� A vacant entry.Á Ÿ�ú t§�’Î º�ú <Â�âÇ üÎ�.¯£
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ü�ž5±— »žú ÔÞÀ¤
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ê¤ú üî¤F C let _entry_o: OccupiedEntry<_, _, _> = map.entry("a").insert(100);Á ìµ¥ü³ Ó¥ú ü×¥' $ // Existing key (insert and update)Á Ôÿ¥À¤
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üƦ& # Entry::Occupied(mut view) => {Á üí¦) & assert_eq!(view.get(), &100);Á ü—§# let v = view.get_mut();Á ¬»§ *v *= 10;Á üѧ0 - assert_eq!(view.insert(1111), 1000);Á L‚¨¹Ü ,Œ¨ˆØ ’¨ú ü–¨ assert_eq!(map[&"a"], 1111);Á ì·¨ü³ Õ¨ú ÔÙ¨ // Existing key (take)Á Ôô¨ match map.entry("c") {Á ü�©+å¤
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Ê 8õíãîÃô‹ó$Œ¯± ’¯üá¶O üÔ°. + A view into a vacant entry in a `HashMap`.Á üƒ±% " It is part of the [`Entry`] enum.Á ©±ú t±’Î ¼±ú <À±âÇ üȱ; 8 use hashbrown::hash_map::{Entry, HashMap, VacantEntry};Á „²ú üˆ². + let mut map = HashMap::<&str, i32>::new();Á ·²ú ü»²> ; let entry_v: VacantEntry<_, _, _> = match map.entry("a") {Á üú²$ ! Entry::Vacant(view) => view,Á üŸ³-÷§
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4ͳ };Á ¼Ô³ entry_v.insert(10);Á üì³/ , assert!(map[&"a"] == 10 && map.len() == 1);Á œ´ú ü ´* ' // Nonexistent key (insert and update)Á ÔË´ match map.entry("b") {Á üæ´-÷§
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ü”µ Entry::Vacant(view) => {Á üµµ' $ let value = view.insert(2);Á üݵ" assert_eq!(*value, 2);Á Ä€¶ *value = 20;Á L™¶¹Ü ,£¶ˆØ ü©¶/ , assert!(map[&"b"] == 20 && map.len() == 2);Á <Ù¶âÇ \ì¶ § Ì œ Í § Î ¤ Ï ’ Ð Í Î Ì Ð Ï ¶… ü¶ Ç… ÿ¶ íŸ
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Ù 8õíãîÃô‹ó$и± Ö¸ü¤Æ9 ü̹P M A view into a single entry in a map, which may either be vacant or occupied,Á ü�º1 . with any borrowed form of the map's key type.Á Ϻú Óºú ü׺L I This `enum` is constructed from the [`entry_ref`] method on [`HashMap`].Á ¤»ú ü¨»U R [`Hash`] and [`Eq`] on the borrowed form of the map's key type *must* match thoseÁ üþ»S P for the key type. It also require that key may be constructed from the borrowedÁ üÒ¼' $ form through the [`ToOwned`] trait.Á ú¼ú üþ¼% " [`entry_ref`]: HashMap::entry_refÁ ¤½ú t¨½’Î ·½ú <»½âÇ üý@ = use hashbrown::hash_map::{EntryRef, HashMap, OccupiedEntry};Á „¾ú üˆ¾!î² üª¾K H map.extend([("a".to_owned(), 10), ("b".into(), 20), ("c".into(), 30)]);Á ìö¾ü³ ”¿ú 䘿ĕ
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üµ¿ let key = String::from("a");Á üÖ¿: 7 let entry: EntryRef<_, _, _, _> = map.entry_ref(&key);Á ü‘À< 9 let _raw_o: OccupiedEntry<_, _, _, _> = entry.insert(1);Á ìÎÀü³ üìÀ ÷–
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üŒÁ! map.entry_ref("d").insert(4);Á ®Áú ü²Á Õ—
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üÒÁ, ) let v = map.entry_ref("b").or_insert(2);Á üÿÁ,²˜
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üÏÂ$ ! map.entry_ref("e").or_insert(5);Á ôÂú üøÂ$Ι
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ü�Ã4 1 let v = map.entry_ref("c").or_insert_with(|| 3);Á üÒÃ,¸š
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ü§Ä, ) map.entry_ref("f").or_insert_with(|| 6);Á ÔÄú üØÄ'á›
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€Åú ü„ÅO L for (key, value) in ["a", "b", "c", "d", "e", "f"].into_iter().zip(1..=6) {Á üÔÅ# assert_eq!(map[key], value)Á ,øÅˆØ ìþÅ assert_eq!(map.len(), 6);Á <œÆâÇ DÆ § Û ƒ> Ü œ Ý ¢ Þ § ß ¤ à ’ á á Ý Û ß à Þ Ü Íì�÷ ¾Æ Îì‡÷ ÁÆ Íì�÷ ÌÆ Íì“÷ ÏÆ Íì™÷ TÒÆ ™÷ LëÆ �÷ §î �÷ §ü “÷ §
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—Çú tŸÇ’Î ²Çú <ºÇâÇ üÆÇ1 . use hashbrown::hash_map::{EntryRef, HashMap};Á üüÇS P let mut map: HashMap<_, _> = [("a".to_owned(), 100), ("b".into(), 200)].into();Á ÔÈú ôÜÈ match map.entry_ref("a") {Á üÿÈ. + EntryRef::Vacant(_) => unreachable!(),Á ü²É$ ! EntryRef::Occupied(_) => { }Á ,ÛÉˆØ <åÉâÇ Ò¸ Ú Ú
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üƒÌ0 - EntryRef::Occupied(_) => unreachable!(),Á ü¸Ì" EntryRef::Vacant(_) => { }Á ,ßÌˆØ <éÌâÇ ë¹ Ú Ú
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üÿÐ( % It is part of the [`EntryRef`] enum.Á ¨Ñú t¬Ñ’Î »Ñú <¿ÑâÇ üÇÑA > use hashbrown::hash_map::{EntryRef, HashMap, VacantEntryRef};Á ‰Òú ü�Ò0 - let mut map = HashMap::<String, i32>::new();Á ¾Òú üÂÒH E let entry_v: VacantEntryRef<_, _, _, _> = match map.entry_ref("a") {Á ü‹Ó' $ EntryRef::Vacant(view) => view,Á ü³Ó0êæ
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€ 8 8�÷‡÷�÷“÷™÷$´Ù± ºÙüùà< ü´ÚZ W The error returned by [`try_insert`](HashMap::try_insert) when the key already exists.Á �Ûú ü“ÛE B Contains the occupied entry, and the value that was not inserted.Á ÙÛú tÝÛ’Î ìÛú <ðÛâÇ üøÛ6 3 use hashbrown::hash_map::{HashMap, OccupiedError};Á ¯Üú ü³Ü? < let mut map: HashMap<_, _> = [("a", 10), ("b", 20)].into();Á óÜú ü÷ÜS P // try_insert method returns mutable reference to the value if keys are vacant,Á üËÝP M // but if the map did have key present, nothing is updated, and the providedÁ üœÞ0 - // value is returned inside `Err(_)` variantÁ üÍÞ$ ! match map.try_insert("a", 100) {Á üòÞ4 1 Err(OccupiedError { mut entry, value }) => {Á ü§ß* ' assert_eq!(entry.key(), &"a");Á üÒß# assert_eq!(value, 100);Á üöß- * assert_eq!(entry.insert(100), 10)Á L¤à¹Ü ä®à _ => unreachable!(),Á ,ËàˆØ üÑà assert_eq!(map[&"a"], 100);Á <ñàâÇ l„á § ‚ œ ƒ § „ ¤ … ’ † † „ ‚ ƒ … ¶… –á Ç… ™á íŸ
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dôâ ü¢âM J The value which was not inserted, because the entry was already occupied.Á,øâ � � ãîü…ãQ 8 ð œ Š § ‹ ¤ Œ ’ � ð � ‹ Œ Š ¶… Šã Ç… ”ã íŸ
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Líèìø›œ� ÈL ÉL ÊL � ÝèMO QS UW Y[ L§é$¬é • • ³€lÇéDÌé • • êùü¾ï$ üìéK H Creates an iterator over the entries of a `HashMap` in arbitrary order.Á ü¼ê2�Ç óêú üûêK H Return the same `Iter` struct as by the [`iter`] method on [`HashMap`].Á Ëëú ÜÓë‘‚ óëú tûë’Î Žìú <–ìâÇ Ü¢ìÂÎ üÂìG D let map_one: HashMap<_, _> = [(1, "a"), (2, "b"), (3, "c")].into();Á üŽí% " let mut map_two = HashMap::new();Á ¸íú üÀí" for (key, value) in &map_one {Á üçí3 0 println!("Key: {}, Value: {}", key, value);Á üŸî% " map_two.insert(*key, *value);Á ,ÉîˆØ Óîú üÛî! assert_eq!(map_one, map_two);Á <�ïâÇ LÁï ìøêù • •
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L—ðÂù¤¥¦ ÈL ÉL ÊL ¦ ‡ðMO QS UW Y[ LÕð$Úð ž ž —— lùðDþð ž ž Úúüûø' ü¡ñJ G Creates an iterator over the entries of a `HashMap` in arbitrary orderÁ üðñG D with mutable references to the values. The iterator element type isÁ ̼ò `(&'a K, &'a mut V)`.Á Úòú üâòE B Return the same `IterMut` struct as by the [`iter_mut`] method onÁ „¬ó
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[`HashMap`].Á Áóú üÉó#Í� ñóú tùó’Î Œôú <”ôâÇ Ü ôÂÎ üÀôG D let mut map: HashMap<_, _> = [("a", 1), ("b", 2), ("c", 3)].into();Á Œõú ü”õ" for (key, value) in &mut map {Á ü»õ3«• ¤óõ *value *= 2;Á ,ŒöˆØ –öú üžö1 . let mut vec = map.iter().collect::<Vec<_>>();Á üÔöDäÊ ü�÷@³Ë Äâ÷‚· üÿ÷: 7 assert_eq!(vec, [(&"a", &2), (&"b", &4), (&"c", &6)]);Á <¾øâÇ Lþø ÂùÚú ž ž
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¦ §õíãîÃô‹ó$ˆùüÆù@ œ ¨ § © ¤ ª ’ « © « ª ¨ Òù Ëù ãù Îù ôù Ñù …ú Ôù –úL×ù´ì¬® ÈL ÉL ÊL ® FH JL NP RT L�ú$’ú § § �€l¥úDªú § § � � æ ‘Ÿ ˜ ¥K@¬žú‚Äììòìþìü±€' üÍúH E Creates a consuming iterator, that is, one that moves each key-valueÁ üšûH E pair out of the map in arbitrary order. The map cannot be used afterÁ Œçû calling this.Á ýûú t…ü’Î ˜üú < üâÇ Ü¬üÂÎ Ìüú üÔüC @ let map: HashMap<_, _> = [("a", 1), ("b", 2), ("c", 3)].into();Á œýú ü¤ý // Not possible with .iter()Á üÉý> ; let mut vec: Vec<(&str, i32)> = map.into_iter().collect();Á üŒþD A // The `IntoIter` iterator produces items in arbitrary order, soÁ üÕþD A // the items must be sorted to test them against a sorted array.Á Äžÿ‚· ü»ÿ4ŒÌ <ôÿâÇ L´€ ´ìå£ § §
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á â ã ä æ è é ë í üÄOQ SU WY [] ü¶Èq ü³Å@ = Sets the value of the entry, and returns an `OccupiedEntry`.Á øÅú t€Æ’Î “Æú <›ÆâÇ Ü§ÆÂÎ ÇÆú üÏÆ5 2 let mut map: HashMap<&str, u32> = HashMap::new();Á ü‰Ç3 0 let entry = map.entry("horseyland").insert(37);Á ÁÇú üÉÇ+ ( assert_eq!(entry.key(), &"horseyland");Á <ùÇâÇ 4½È ³
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á §õíãîÃô‹ó$ÄÈ»,ÊÈüÞÏb üŒËR O Ensures a value is in the entry by inserting the default if empty, and returnsÁ üãË2ÂÎ šÌú t¢Ì’Î µÌú <½ÌâÇ ÜÉÌÂÎ éÌú üñÌ5¤‚ «Íú ´³Í // nonexistent keyÁ üÎÍ( % map.entry("poneyland").or_insert(3);Á üûÍ$ ! assert_eq!(map["poneyland"], 3);Á ¤Îú œ¬Î // existing keyÁ üÄÎ/ , *map.entry("poneyland").or_insert(10) *= 2;Á üøÎ$ ! assert_eq!(map["poneyland"], 6);Á <¡ÏâÇ LåÏ ³
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ã Û Û Ùú$£Ð … \´Ð
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â §õíãîÃô‹ó$ïÏ><õÏü•×| üäÑF C Ensures a value is in the entry by inserting the default if empty,Á ü¯Ò% " and returns an [`OccupiedEntry`].Á ÙÒú táÒ’Î ôÒú <üÒâÇ ÜˆÓÂÎ ¨Óú ü°Ó5¤‚ êÓú ´òÓÓ† ü�Ô: 7 let entry = map.entry("poneyland").or_insert_entry(3);Á üÌÔ* ' assert_eq!(entry.key(), &"poneyland");Á üûÔ assert_eq!(entry.get(), &3);Á Õú œ¨Õ⇠üÀÕ? < let mut entry = map.entry("poneyland").or_insert_entry(10);Á ü„Ö*·Œ ü³Ö ìŒ <ØÖâÇ |œ× ³
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ã §õíãîÃô‹ó$¬×><²×ü©Þy ü°Ù] Z Ensures a value is in the entry by inserting the result of the default function if empty,Á ü’Ú> ; and returns a mutable reference to the value in the entry.Á ÕÚú tÝÚ’Î ðÚú <øÚâÇ Ü„ÛÂÎ ¤Ûú ü¬Û5¤‚ æÛú ´îÛÓ† ü‰Ü0 - map.entry("poneyland").or_insert_with(|| 3);Á ü¾Ü$§‡ çÜú œïÜ⇠ü‡Ý7 4 *map.entry("poneyland").or_insert_with(|| 10) *= 2;Á üÃÝ$ºˆ <ìÝâÇ t°Þ ³
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ä §õíãîÃô‹óñ÷ $ÑÞ><×Þqs ü˜è üÈà_ \ Ensures a value is in the entry by inserting, if empty, the result of the default function.Á ü¬á_ \ This method allows for generating key-derived values for insertion by providing the defaultÁ ü�âX U function a reference to the key that was moved during the `.entry(key)` method call.Á íâú üõâT Q The reference to the moved key is provided so that cloning or copying the key isÁ üÎã8 5 unnecessary, unlike with `.or_insert_with(|| ... )`.Á ‹äú t“ä’Î ¦äú <®äâÇ ÜºäÂÎ Úäú üâä7 4 let mut map: HashMap<&str, usize> = HashMap::new();Á žåú ´¦åÓ† üÁåI F map.entry("poneyland").or_insert_with_key(|key| key.chars().count());Á ü�æ$ ! assert_eq!(map["poneyland"], 9);Á ¸æú œÀæ⇠üØæT Q *map.entry("poneyland").or_insert_with_key(|key| key.chars().count() * 10) *= 2;Á ü±ç% " assert_eq!(map["poneyland"], 18);Á <ÛçâÇ ”Ÿè ³
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ñ÷ œ— Û — ç ç Û »ø ²è ® –"ñ÷ ®õí |µè ® ñ÷ ”ž ˜" ãî Ãè Ùú$úè … \‹é
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æ §õíãîÃô‹óñ÷ $Æè><Ì艋 ¼éî üŠë, ) Returns a reference to this entry's key.Á »ëú tÃë’Î Öëú <ÞëâÇ ÜêëÂÎ Šìú ü’ì5¤‚ üÌì(ô† œùì⇠ü‘í; 8 assert_eq!(map.entry("poneyland").key(), &"poneyland");Á ´ÑíÓ† üìí; 8 assert_eq!(map.entry("horseland").key(), &"horseland");Á <¬îâÇ ðî ¯ ¯³
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è §õíãîÃô‹ó$õîü�õM üšðD A Provides in-place mutable access to an occupied entry before anyÁ üãð# potential inserts into the map.Á ‹ñú t“ñ’Î ¦ñú <®ñâÇ ÜºñÂÎ Úñú üâñ5¤‚ œòú Ô¤ò map.entry("poneyland")Á üÃò# .and_modify(|e| { *e += 1 })Á ´ëò .or_insert(42);Á ü†ó% " assert_eq!(map["poneyland"], 42);Á °óú Ô¸óê£ ü×ó#�¤ ´ÿó¼¤ üšô% " assert_eq!(map["poneyland"], 43);Á <ÄôâÇ Tˆõ ³
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é §õíãîÃô‹óñ÷ $–õ± œõtv ü‹„e ü¾÷F C Provides shared access to the key and owned access to the value ofÁ ü‰øE B an occupied entry and allows to replace or remove it based on theÁ üÓø! value of the returned option.Á ùøú t�ù’Î ”ùú <œùâÇ Ü¨ùÂÎ üÈù# use hashbrown::hash_map::Entry;Á ðùú üøù5¤‚ ²úú œºú let entry = mapÁ ÜÒú .entry("poneyland")Á üòú3 0 .and_replace_entry_with(|_k, _v| panic!());Á ªûú Œ²û match entry {Á ìÈû Entry::Vacant(e) => {Á üêû. + assert_eq!(e.key(), &"poneyland");Á L�ü¹Ü ü«ü' $ Entry::Occupied(_) => panic!(),Á ,×üˆØ áüú üéü map.insert("poneyland", 42);Á Žýú œ–ýÁª Ü®ýÞª üÎý( % .and_replace_entry_with(|k, v| {Á üûý( % assert_eq!(k, &"poneyland");Á ô¨þ assert_eq!(v, 42);Á ¼Ëþ Some(v + 1)Á \çþ });Á ÷þú ŒÿþΫ ü•ÿ Entry::Occupied(e) => {Á ü¹ÿ.‘¬ üìÿ% " assert_eq!(e.get(), &43);Á L–€¹Ü ü¤€% " Entry::Vacant(_) => panic!(),Á ,΀ˆØ Ø€ú üà€%Å¥ Š�ú œ’�Áª ܪ�Þª üÊ�/ , .and_replace_entry_with(|_k, _v| None);Á þ�ú Œ†‚Ϋ üœ‚> ; Entry::Vacant(e) => assert_eq!(e.key(), &"poneyland"),Á üß‚'ج ,‹ƒˆØ •ƒú ü�ƒ, ) assert!(!map.contains_key("poneyland"));Á <΃âÇ ´’„ ³
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Û — ì ì Û »ø ©„ ± –"ñ÷ ±õí ãî ÔÕ„ ± ñ÷ ¹µ ˜" ۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙãîLæ„
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ë §õíãîÃô‹óñ÷ $¬„± ²„À ü׆4 üŠ†H E Converts the `Entry` into a mutable reference to the underlying map.ÁDÞ† ³
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í §õíãîÃô‹ó$ç†üšˆ> § ï œ ð § ñ ¤ ò ’ ó ò ð ñ ï ó ¶… £ˆ Ç… ¦ˆ íŸ
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ô ŸˆHJ LN PR TV üÞ�W ü߈L I Ensures a value is in the entry by inserting the default value if empty,Á ü°‰>�� ó‰ú tû‰’Î ŽŠú <–ŠâÇ Ü¢ŠÂЊú üÊŠ= : let mut map: HashMap<&str, Option<u32>> = HashMap::new();Á Œ‹ú ´”‹Ó† ü¯‹( % map.entry("poneyland").or_default();Á üÜ‹' $ assert_eq!(map["poneyland"], None);Á ˆŒú ü�Œ% " map.insert("horseland", Some(3));Á ºŒú œÂŒâ‡ üÚŒB ? assert_eq!(map.entry("horseland").or_default(), &mut Some(3));Á <¡�âÇ Tå� ³
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ç�XZ \^ `b df ¼—” ü¦�- * Gets a reference to the key in the entry.Á Ø�ú tà�’Î ó�ú <û�âÇ ü‡‘.¯£
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º‘ú ü‘5¤‚ üü‘) & map.entry("poneyland").or_insert(12);Á ª’ú ü²’" match map.entry("poneyland") {Á üÙ’%Ï° üƒ“H E Entry::Occupied(entry) => assert_eq!(entry.key(), &"poneyland"),Á ,ГˆØ <Ú“âÇ ž” ² ²´¡
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û §õíãîÃô‹ó$£”üäœN üå”1 . Replaces the key in the entry with a new one.Á ›•ú d£•ƒ” ´•ú ü¼•J G This method panics if `key` is not equivalent to the key in the entry.Á ‹–ú t“–’Î ¦–ú <®–âÇ üº–.¯£
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í–ú üõ–5¤‚ ¯—ú ô·— let old_key = "poneyland";Á üÚ—A > let new_key = Box::leak(old_key.to_owned().into_boxed_str());Á ü ˜% " map.entry(old_key).or_insert(12);Á üʘ# match map.entry("poneyland") {Á üò˜%Ï° üœ™' $ Entry::Occupied(mut entry) => {Á üÈ™6 3 let replaced = entry.replace_key(new_key);Á üƒš5 2 assert!(std::ptr::eq(replaced, old_key));Á ü½š9 6 assert!(std::ptr::eq(*entry.key(), new_key));Á Tûš»£ ,Š›ˆØ ”›ú üœ›, ) # // appease miri; no memory leaks here!Á „Í›
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# drop(map);Á tâ› # unsafe {Á üõ›! # Box::from_raw(new_key);Á <›œý£ <§œâÇ \ëœ ³ ³´¡
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õíõí õ ÷œ õ õíõí l¤�
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ü §õíãîÃô‹ó$üœïT ‚�üí«; üÀŸF C Replaces the key in the entry with a new one, without checking theÁ Ü‹ equivalence of the key.Á « ú d³ éö Ä ú üÌ I F This operation is safe if you replace the key with an equivalent one.Á š¡ú ü¢¡J G Additionally, this operation (and following operations) are guaranteedÁ üñ¡! to not violate memory safety.Á —¢ú üŸ¢J’à üî¢Dçà ü·£E B correctly. If the map has keys at unexpected positions inside it,Á ü�¤L I future operations may panic, loop forever, or return unexpected results,Á üÒ¤( % potentially violating memory safety.Á ÿ¤ú t‡¥’Î š¥ú <¢¥âÇ ü®¥.¯£
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á¥ú üé¥5¤‚ £¦ú ô«¦ÇÆ üΦAðÆ ü”§%¼Ç ü¾§#ìÇ üæ§%Ï° ü�¨'©È ü¼¨K H let replaced = unsafe { entry.replace_key_unchecked(new_key) };Á üŒ©5œÉ üÆ©9ÜÉ T„ª»£ ,“ªˆØ �ªú ü¥ª,ÉÊ „ÖªÿÊ tëª™Ë üþª!²Ë <¤«ý£ <°«âÇ ¬û« ´ ´´¡
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õíõí õ ‘¬ õ
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ý §õíãîÃô‹ó$–¬ïT œ¬ü¨³# üö¬9 6 Take the ownership of the key and value from the map.Á ü´)Ÿö âú tê’Î ýú <…®âÇ Ü‘®ÂÎ ü±®#ë© Ù®ú üá®5¤‚ ¼›¯‚Ú ü·¯3¤Ú ï¯ú ü÷¯)µÁ ¥°ú ü°8 5 if let Entry::Occupied(o) = map.entry("poneyland") {Á üê°, ) // We delete the entry from the map.Á ü›±8 5 assert_eq!(o.remove_entry(), ("poneyland", 12));Á ,رˆØ â±ú üê±5 2 assert_eq!(map.contains_key("poneyland"), false);Á ü¤²!„â äʲ¨Ü <ë²âÇ d¯³ ´¡
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Û€ õ õ
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þ §õíãîÃô‹ó$¼³¼�¸ ü‘´/ , Gets a reference to the value in the entry.Á Å´ú tÍ´’Î à´ú <è´âÇ Üô´ÂÎ ü”µ#ë© ¼µú üĵ5¤‚ üþµ)µÁ ¬¶ú ü´¶"öÁ üÛ¶%Ï° ü…·? < Entry::Occupied(entry) => assert_eq!(entry.get(), &12),Á ,É·ˆØ <Ó·âÇ —¸ µ µ´¡
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µãî õ ›¸ õ
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ÿ §õíãîÃô‹ó$œ¸üÓ¿# üÞ¸7 4 Gets a mutable reference to the value in the entry.Á š¹ú ü¢¹H E If you need a reference to the `OccupiedEntry` which may outlive theÁ üï¹7 4 destruction of the `Entry` value, see [`into_mut`].Á «ºú ü³º" [`into_mut`]: #method.into_mutÁ Úºú t⺒Πõºú <ýºâÇ Ü‰»ÂÎ ü©»#ë© Ñ»ú üÙ»5¤‚ ü“¼)µÁ Á¼ú üɼ% " assert_eq!(map["poneyland"], 12);Á üó¼< 9 if let Entry::Occupied(mut o) = map.entry("poneyland") {Á Ü´½ *o.get_mut() += 10;Á üÔ½! assert_eq!(*o.get(), 22);Á ú½ú ü‚¾4 1 // We can use the same Entry multiple times.Á Ô»¾ *o.get_mut() += 2;Á ,Ú¾ˆØ ä¾ú üì¾% " assert_eq!(map["poneyland"], 24);Á <–¿âÇ <Ú¿ ¶ ¶´¡
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§õíãîÃô‹ó$ç¿ü‰Ç" ü±ÀS P Converts the `OccupiedEntry` into a mutable reference to the value in the entryÁ ü‰Á, ) with a lifetime bound to the map itself.Á ºÁú üÂÁL I If you need multiple references to the `OccupiedEntry`, see [`get_mut`].Á “Âú ü›Â [`get_mut`]: #method.get_mutÁ ÀÂú tÈÂ’Î ÛÂú <ãÂâÇ üïÂ.¯£
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¢Ãú üªÃ5¤‚ üäÃ)µÁ ’Äú üšÄ%ðâ ÄÄú ÄÌÄ let value: &mut u32;Á üéÄ"öÁ ü�Å; 8 Entry::Occupied(entry) => value = entry.into_mut(),Á üÐÅ%Ï° ,úÅˆØ Œ„Æ *value += 10;Á šÆú ü¢Æ% " assert_eq!(map["poneyland"], 22);Á <ÌÆâÇ D�Ç ´¡
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§õíãîÃô‹ó$™Çü×Ï- üæÇB ? Converts the `OccupiedEntry` into a reference to the key and aÁ üÈL I mutable reference to the value in the entry with a lifetime bound to theÁ |þÈ map itself.Á ’Éú üšÉK H If you need multiple references to the `OccupiedEntry`, see [`key`] andÁ „êÉ
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[`get_mut`].Á ÿÉú ´‡Ê [`key`]: Self::keyÁ ô¢Ê [`get_mut`]: Self::get_mutÁ ÅÊú tÍÊ’Î àÊú <èÊâÇ üôÊ.¯£
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§Ëú ü¯Ë5¤‚ üéË)µÁ —Ìú üŸÌ%ðâ ÉÌú üÑÌ# let key_val: (&&str, &mut u32);Á üùÌ"öÁ ü Í? < Entry::Occupied(entry) => key_val = entry.into_entry(),Á üäÍ%Ï° ,ŽÎˆØ ¬˜Î *key_val.1 += 10;Á ²Îú üºÎ1 . assert_eq!(key_val, (&"poneyland", &mut 22));Á üðÎ%‡ì <šÏâÇ TÞÏ ´¡
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—— õ õ
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§õíãîÃô‹ó$éÏüøÔ' üÝÐC @ Sets the value of the entry, and returns the entry's old value.Á ¥Ñú tÑ’Î ÀÑú <ÈÑâÇ ÜÔÑÂÎ üôÑ#ë© œÒú ü¤Ò5¤‚ üÞÒ)µÁ ŒÓú ü”Ó< ã üÕÓ% " assert_eq!(o.insert(15), 12);Á ,ÿÓˆØ ‰Ôú ü‘Ô% " assert_eq!(map["poneyland"], 15);Á <»ÔâÇ 4ÿÔ · ·´¡
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§õíãîÃô‹ó$‹Õ»,‘ÕÄÁÛ üÙÕ5 2 Takes the value out of the entry, and returns it.Á ü“Ö)Ÿö ÁÖú tÉÖ’Î ÜÖú <äÖâÇ ÜðÖÂÎ ü�×#ë© ¸×ú üÀ×5¤‚ ¼ú×‚Ú ü–Ø3¤Ú ÎØú üÖØ)µÁ „Ùú üŒÙ8ÚØ üÉÙ# assert_eq!(o.remove(), 12);Á ,ñÙˆØ ûÙú üƒÚ5²Ú ü½Ú!„â äãÚ¨Ü <„ÛâÇ 4ÈÛ ´¡
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§õíãîÃô‹ó$ÏÛüèçr ü…ÜFÚ§ üÐÜ= : the entry and allows to replace or remove it based on theÁ ü’Ý!û¨ ¸Ýú tÀÝ’Î ÓÝú <ÛÝâÇ ÜçÝÂÎ ü‡Þ#ë© ¯Þú ü·Þ5¤‚ üñÞ ¥ –ßú üžß. + let entry = match map.entry("poneyland") {Á üÑß Ø¯ üõß) & e.replace_entry_with(|k, v| {Á ü£à, ) assert_eq!(k, &"poneyland");Á üÔà" assert_eq!(v, 42);Á Üûà Some(v + 1)Á t›á })Á L®á¹Ü ü¼á%Ï° 4æáþÃ
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ñáú ŒùáΫ ü�â د ü³â.‘¬ üæâ%‘° L�ã¹Ü üžã%Ï° ,ÈãˆØ Òãú üÚã%Å¥ „äú üŒä.µþ ü¿äB ? Entry::Occupied(e) => e.replace_entry_with(|_k, _v| None),Á ü†å%Ï° 4°åþÃ
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»åú ŒÃåΫ ìÙåé« üûå.‘¬ L®æ¹Ü ü¼æ'ج ,èæˆØ òæú üúæ,š³ <«çâÇ ”ïç ´¡
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õíãîÃô‹óñ÷ Û€Ôõ ñ÷ ۼݼ޼© ß¼ à¼ÛἈ cSñŸ«‡zÙõíü“ï4 ü¾îP M Converts the `OccupiedEntry` into a mutable reference to the underlying map.ÁDšï ´¡
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ëïCE GI KM OQ ¼§ó ü¨ðI F Gets a reference to the key that would be used when inserting a valueÁ ôöð through the `VacantEntry`.Á ™ñú t¡ñ’Î ´ñú <¼ñâÇ ÜÈñÂÎ èñú üðñ5¤‚ üªò;ÙŸ <êòâÇ ®ó ¹ ¹¡¢
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§õíãîÃô‹ó$³óÔŽ÷ ôÞó Take ownership of the key.Á �ôú t‰ô’Î œôú <¤ôâÇ ü°ô.¯£
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ãôú üëô5¤‚ ¥õú üõ"öÁ üÔõ'ج ü€öB ? Entry::Vacant(v) => assert_eq!(v.into_key(), "poneyland"),Á ,ÇöˆØ <ÑöâÇ D•÷ ¡¢
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§õíãîÃô‹ó$ž÷üÁû] üÇ÷? < Sets the value of the entry with the [`VacantEntry`]'s key,Á ü‹ø* ' and returns a mutable reference to it.Á ºøú tÂø’Î Õøú <ÝøâÇ ÜéøÂÎ ü‰ù#ë© ±ùú ü¹ù5¤‚ óùú üûù6 3 if let Entry::Vacant(o) = map.entry("poneyland") {Á ¬¶ú o.insert(37);Á ,ÐúˆØ üÚú% " assert_eq!(map["poneyland"], 37);Á <„ûâÇ 4Èû ¡¢
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üÛþ%ÇŠ …ÿú t�ÿ’Î ÿú <¨ÿâÇ Ü´ÿÂÎ üÔÿ#ë© üÿú ü„€5¤‚ ¾€ú üÆ€6 3 if let Entry::Vacant(v) = map.entry("poneyland") {Á ü��# let o = v.insert_entry(37);Á ü©�! assert_eq!(o.get(), &37);Á ,Ï�ˆØ <Ù�âÇ d�‚ ¡¢
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§õíãîÃô‹ó$ª‚»,°‚ü�†4 üº…N K Converts the `VacantEntry` into a mutable reference to the underlying map.ÁD”† ¡¢
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å†é†Y[ ]_ ac eg ik ü½Š� üµ‡@ˆ� ú‡ú t‚ˆ’Î •ˆú <�ˆâÇ Ü©ˆÂΠɈú üш7 4 let mut map: HashMap<String, u32> = HashMap::new();Á ü�‰7 4 let entry = map.entry_ref("horseyland").insert(37);Á ɉú üщ* ' assert_eq!(entry.key(), "horseyland");Á <€ŠâÇ 4ÄŠ ¿Þ
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Ù�ú ´á�Ó† üü�, ) map.entry_ref("poneyland").or_insert(3);Á ü�$§‡ Ö�ú œÞ�⇠üö�3 0 *map.entry_ref("poneyland").or_insert(10) *= 2;Á ü®‘$ºˆ <בâÇ L›’ ¿Þ
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§ ƒ>�÷‡÷�÷“÷™÷$¥’><«’ü™˜ ü¿”]§� ü¡•>�� ä•ú tì•’Î ÿ•ú <‡–âÇ Ü“–ÂÎ ³–ú ü»–7óœ
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÷–ú ´ÿ–Ó† üš—4 1 map.entry_ref("poneyland").or_insert_with(|| 3);Á üÓ—$§‡ ü—ú œ„˜â‡ üœ˜; 8 *map.entry_ref("poneyland").or_insert_with(|| 10) *= 2;Á üܘ$ºˆ <…™âÇ tÉ™ ¿Þ
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$ê™><ð™�� ü¡¢ª ü†œ_ë” üêœ_Õ• üÎ�7 4 function an access to the borrower form of the key.Á Šžú t’ž’Î ¥žú <žâÇ Ü¹žÂÎ Ùžú üáž9 6 let mut map: HashMap<String, usize> = HashMap::new();Á ŸŸú ´§ŸÓ† üŸM J map.entry_ref("poneyland").or_insert_with_key(|key| key.chars().count());Á ü” $Óš ½ ú œÅ ⇠üÝ X U *map.entry_ref("poneyland").or_insert_with_key(|key| key.chars().count() * 10) *= 2;Á üº¡%ü› <ä¡âÇ ”¨¢ ¿Þ
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œ·§â‡ üϧ> ; assert_eq!(map.entry_ref("poneyland").key(), "poneyland");Á ´’¨Ó† ü¨> ; assert_eq!(map.entry_ref("horseland").key(), "horseland");Á <ð¨âÇ ´© » »¿Þ
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é´í´[] _a ce gi km ü׺v üµLŽ¹ ü“¶>�� Ö¶ú tÞ¶’Î ñ¶ú <ù¶âÇ Ü…·ÂÎ ¥·ú ü·? < let mut map: HashMap<String, Option<u32>> = HashMap::new();Á ñ·ú ´ù·Ó† ü”¸, ) map.entry_ref("poneyland").or_default();Á üŸ'Û» ñ¸ú üù¸1 . map.insert("horseland".to_string(), Some(3));Á ¯¹ú œ·¹â‡ üϹF C assert_eq!(map.entry_ref("horseland").or_default(), &mut Some(3));Á <šºâÇ TÞº ¿Þ
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˜¿ú ´ ¿Ó† ü»¿> ; let entry = map.entry_ref("poneyland").or_default_entry();Á üþ¿*·Œ üÀ# assert_eq!(entry.get(), &None);Á ÕÀú œÝÀ⇠üõÀ1ö¼
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ü«Á> ; let entry = map.entry_ref("horseland").or_default_entry();Á üîÁ* ' assert_eq!(entry.key(), &"horseland");Á ü�Â& # assert_eq!(entry.get(), &Some(3));Á <ÈÂâÇ „ŒÃ ¿Þ
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$ÈÅ$ÎÅ\^ `b df hj ln äÊÉ ü¦ÆI׊
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üôÆ! through the `VacantEntryRef`.Á šÇú t¢Ç’Î µÇú <½ÇâÇ ÜÉÇÂÎ éÇú üñÇ7óœ
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üÈ let key: &str = "poneyland";Á üÒÈ6 3 assert_eq!(map.entry_ref(key).key(), "poneyland");Á <�ÉâÇ ÑÉ ½ ½¤ö
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ìV øV�÷‡÷�÷“÷™÷$ÖÉü©Î~ ü…Ê@ = Sets the value of the entry with the `VacantEntryRef`'s key,Á üÊÊ*˜‘
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ùÊú t�Ë’Î ”Ëú <œËâÇ Ü¨ËÂÎ üÈË& # use hashbrown::hash_map::EntryRef;Á óËú üûË7óœ
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ÜÌú üäÌ5 2 if let EntryRef::Vacant(o) = map.entry_ref(key) {Á ¬žÍ‰“
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ìV øV�÷‡÷�÷“÷™÷$·Î»,½ÎüŸÚŠ ü«ÑJ G Sets the key and value of the entry and returns a mutable reference toÁ ¼úÑ the inserted value.Á –Òú üžÒG D Unlike [`VacantEntryRef::insert`], this method allows the key to beÁ üêÒL I explicitly specified, which is useful for key types that don't implementÁ t»Ó `ToOwned`.Á ÎÓú dÖÓƒ” çÓú üïÓK H This method panics if `key` is not equivalent to the key used to createÁ Ì¿Ô the `VacantEntryRef`.Á ÝÔú låÔ
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# ExampleÁ ÷Ôú <ÿÔâÇ ü‹Õ&¡Ë
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ܶÕÂÎ ÖÕú üÞÕ; 8 let mut map = HashMap::<(String, String), char>::new();Á üžÖ/ , let k = ("c".to_string(), "C".to_string());Á üÒÖ& # let v = match map.entry_ref(&k) {Á üýÖL I // Insert cannot be used here because tuples do not implement ToOwned.Á üÎ×B ? // However this works because we can manually clone instead.Á ü•Ø? < EntryRef::Vacant(r) => r.insert_with_key(k.clone(), 'c'),Á üÙØ+ ( // In this branch we avoid the clone.Á ü‰Ù, ) EntryRef::Occupied(r) => r.into_mut(),Á 4ºÙþÃ
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ÄÅÙ assert_eq!(*v, 'c');Á <âÙâÇ |¦Ú ¤ö
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üÄÜD A the inserted value, without checking the equivalence of the key.Á �Ýú ü•ÝH E See [`insert_with_key`](Self::insert_with_key) for more information.Á âÝú dêÝéö ûÝú üƒÞ6 3 This operation is safe if the keys are equivalent.Á ¾Þú üÆÞJ�Ï ü•ß!åÏ »ßú üÃßJ’à ü’àDçà üÛàE¼Ð ü¥áLŒÑ üöá(ãÑ £âú l«âšÒ
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üÃäR O // SAFETY: We trust the `Clone` implementation to return an equivalent valueÁ üšåT Q EntryRef::Vacant(r) => unsafe { r.insert_with_key_unchecked(k.clone(), 'c') },Á üóå+–Ö
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¯ëú ü·ë5¤‚ ñëú üùë> ; if let EntryRef::Vacant(v) = map.entry_ref(&"poneyland") {Á ü¼ì#Ж
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ìV øV�÷‡÷�÷“÷™÷$åí»,ëíüþù¤ ü¡ñI F Sets the key and value of the entry and returns an [`OccupiedEntry`].Á ïñú ü÷ñJ G Unlike [`VacantEntryRef::insert_entry`], this method allows the key toÁ üÆòE B be explicitly specified, which is useful for key types that don'tÁ Ä�ó implement `ToOwned`.Á óú dµóƒ” Æóú üÎóK•Ñ
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ìV øV�÷‡÷�÷“÷™÷$¸‰ ïT Ɖ »,Ö‰ ü¹� 6 ü㌠Q N Converts the `VacantEntryRef` into a mutable reference to the underlying map.ÁDÀ� ¤ö
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³³ ´ìü—“ u ü�’ R O Inserts all new key-values from the iterator and replaces values with existingÁ üâ’ 4 1 keys with new values returned from the iterator.Á œ É
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SU WY [] _a ü�Ÿ = ü“” S P Inserts all new key-values from the iterator to existing `HashMap<K, V, S, A>`.Á üë” Q N Replace values with existing keys with new values returned from the iterator.Á Á• ú tÉ• ’Î Ü• ú <ä• âÇ üð• % " use hashbrown::hash_map::HashMap;Á š– ú ü¢– !î² ¼È– map.insert(1, 100);Á ä– ú üì– 1 . let some_iter = [(1, 1), (2, 2)].into_iter();Á Ô¢— map.extend(some_iter);Á üÁ— T Q // Replace values with existing keys with new values returned from the iterator.Á üš˜ 9 6 // So that the map.get(&1) doesn't return Some(&100).Á üؘ & # assert_eq!(map.get(&1), Some(&1));Á ƒ™ ú ü‹™ 0 - let some_vec: Vec<_> = vec![(3, 3), (4, 4)];Á ÌÀ™ map.extend(some_vec);Á Þ™ ú üæ™ $ ! let some_arr = [(5, 5), (6, 6)];Á Ì�š map.extend(some_arr);Á üš let old_map_len = map.len();Á Òš ú üÚš / , // You can also extend from another HashMapÁ üŽ› % " let mut new_map = HashMap::new();Á ĸ› new_map.extend(map);Á üÕ› + ( assert_eq!(new_map.len(), old_map_len);Á …œ ú ü�œ 8 5 let mut vec: Vec<_> = new_map.into_iter().collect();Á üÊœ HÚž ü—� @³Ë ÄÜ� ‚· üù� F C assert_eq!(vec, [(1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6)]);Á <Äž âÇ 4„Ÿ ¾ ¾´ìêø
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Ò5d� † ¡ ¾ ,nq_b´.JLJ<TY/2!$T~ý ìïL¦Û޿ª�’y|]`JM14Tˆ% � ̯üdÎéëÕ×Äõ¬üä D üûB ? A hash set implemented as a `HashMap` where the value is `()`.Á ¾ú üÂH E As with the [`HashMap`] type, a `HashSet` requires that the elementsÁ ü‹P M implement the [`Eq`] and [`Hash`] traits. This can frequently be achieved byÁ üÜL I using `#[derive(PartialEq, Eq, Hash)]`. If you implement these yourself,Á ü©6 3 it is important that the following property holds:Á àú \ä Ç üð$µÇ <•âÇ �ú ü¡FÿÇ èú ìú üðI F It is a logic error for an item to be modified in such a way that theÁ üº I F item's hash, as determined by the [`Hash`] trait, or its equality, asÁ ü„
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unsafe code.Á ± ú üµ OÅË ü… NžÌ üÔ P M panic does occur then the contents of the `HashSet` may become corrupted andÁ ü¥
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