1. The Unstable Book
  2. 1. Compiler flags
    1. 1.1. branch_protection
    2. 1.2. cf_protection
    3. 1.3. check_cfg
    4. 1.4. codegen_backend
    5. 1.5. control_flow_guard
    6. 1.6. debug_info_for_profiling
    7. 1.7. dump_mono_stats
    8. 1.8. dump_mono_stats_format
    9. 1.9. dwarf_version
    10. 1.10. dylib_lto
    11. 1.11. emit_stack_sizes
    12. 1.12. export_executable_symbols
    13. 1.13. extern_options
    14. 1.14. instrument_xray
    15. 1.15. location_detail
    16. 1.16. move_size_limit
    17. 1.17. no_unique_section_names
    18. 1.18. profile
    19. 1.19. profile_sample_use
    20. 1.20. remap_cwd_prefix
    21. 1.21. report_time
    22. 1.22. sanitizer
    23. 1.23. self_profile
    24. 1.24. self_profile_events
    25. 1.25. src_hash_algorithm
    26. 1.26. temps_dir
    27. 1.27. tiny_const_eval_limit
    28. 1.28. tls_model
    29. 1.29. unsound_mir_opts
    30. 1.30. virtual_function_elimination
  3. 2. Language features
    1. 2.1. aarch64_ver_target_feature
    2. 2.2. abi_amdgpu_kernel
    3. 2.3. abi_avr_interrupt
    4. 2.4. abi_c_cmse_nonsecure_call
    5. 2.5. abi_msp430_interrupt
    6. 2.6. abi_ptx
    7. 2.7. abi_thiscall
    8. 2.8. abi_unadjusted
    9. 2.9. abi_vectorcall
    10. 2.10. abi_x86_interrupt
    11. 2.11. adt_const_params
    12. 2.12. alloc_error_handler
    13. 2.13. allocator_internals
    14. 2.14. allow_internal_unsafe
    15. 2.15. allow_internal_unstable
    16. 2.16. anonymous_lifetime_in_impl_trait
    17. 2.17. arbitrary_self_types
    18. 2.18. arm_target_feature
    19. 2.19. asm_const
    20. 2.20. asm_experimental_arch
    21. 2.21. asm_unwind
    22. 2.22. associated_const_equality
    23. 2.23. associated_type_bounds
    24. 2.24. associated_type_defaults
    25. 2.25. async_closure
    26. 2.26. async_fn_in_trait
    27. 2.27. auto_traits
    28. 2.28. avx512_target_feature
    29. 2.29. box_patterns
    30. 2.30. bpf_target_feature
    31. 2.31. builtin_syntax
    32. 2.32. c_str_literals
    33. 2.33. c_unwind
    34. 2.34. c_variadic
    35. 2.35. cfg_overflow_checks
    36. 2.36. cfg_sanitize
    37. 2.37. cfg_target_abi
    38. 2.38. cfg_target_compact
    39. 2.39. cfg_target_has_atomic
    40. 2.40. cfg_target_has_atomic_equal_alignment
    41. 2.41. cfg_target_thread_local
    42. 2.42. cfg_version
    43. 2.43. cfi_encoding
    44. 2.44. closure_lifetime_binder
    45. 2.45. closure_track_caller
    46. 2.46. cmse_nonsecure_entry
    47. 2.47. collapse_debuginfo
    48. 2.48. compiler_builtins
    49. 2.49. const_async_blocks
    50. 2.50. const_closures
    51. 2.51. const_extern_fn
    52. 2.52. const_fn_floating_point_arithmetic
    53. 2.53. const_for
    54. 2.54. const_mut_refs
    55. 2.55. const_precise_live_drops
    56. 2.56. const_refs_to_cell
    57. 2.57. const_trait_impl
    58. 2.58. const_try
    59. 2.59. custom_inner_attributes
    60. 2.60. custom_mir
    61. 2.61. custom_test_frameworks
    62. 2.62. decl_macro
    63. 2.63. default_type_parameter_fallback
    64. 2.64. deprecated_safe
    65. 2.65. deprecated_suggestion
    66. 2.66. do_not_recommend
    67. 2.67. doc_auto_cfg
    68. 2.68. doc_cfg
    69. 2.69. doc_cfg_hide
    70. 2.70. doc_masked
    71. 2.71. doc_notable_trait
    72. 2.72. dropck_eyepatch
    73. 2.73. dyn_star
    74. 2.74. effects
    75. 2.75. ermsb_target_feature
    76. 2.76. exclusive_range_pattern
    77. 2.77. exhaustive_patterns
    78. 2.78. explicit_tail_calls
    79. 2.79. extended_varargs_abi_support
    80. 2.80. extern_types
    81. 2.81. ffi_const
    82. 2.82. ffi_pure
    83. 2.83. ffi_returns_twice
    84. 2.84. fn_align
    85. 2.85. fundamental
    86. 2.86. generator_clone
    87. 2.87. generators
    88. 2.88. generic_arg_infer
    89. 2.89. generic_assert
    90. 2.90. generic_associated_types_extended
    91. 2.91. generic_const_exprs
    92. 2.92. half_open_range_patterns_in_slices
    93. 2.93. hexagon_target_feature
    94. 2.94. if_let_guard
    95. 2.95. impl_trait_in_assoc_type
    96. 2.96. impl_trait_in_fn_trait_return
    97. 2.97. impl_trait_projections
    98. 2.98. imported_main
    99. 2.99. inherent_associated_types
    100. 2.100. inline_const
    101. 2.101. inline_const_pat
    102. 2.102. intra_doc_pointers
    103. 2.103. intrinsics
    104. 2.104. lang_items
    105. 2.105. large_assignments
    106. 2.106. lazy_type_alias
    107. 2.107. let_chains
    108. 2.108. link_cfg
    109. 2.109. link_llvm_intrinsics
    110. 2.110. linkage
    111. 2.111. lint_reasons
    112. 2.112. macro_metavar_expr
    113. 2.113. marker_trait_attr
    114. 2.114. min_specialization
    115. 2.115. mips_target_feature
    116. 2.116. more_qualified_paths
    117. 2.117. multiple_supertrait_upcastable
    118. 2.118. must_not_suspend
    119. 2.119. naked_functions
    120. 2.120. native_link_modifiers_as_needed
    121. 2.121. needs_panic_runtime
    122. 2.122. negative_bounds
    123. 2.123. negative_impls
    124. 2.124. never_type
    125. 2.125. never_type_fallback
    126. 2.126. no_core
    127. 2.127. no_coverage
    128. 2.128. no_sanitize
    129. 2.129. non_exhaustive_omitted_patterns_lint
    130. 2.130. non_lifetime_binders
    131. 2.131. object_safe_for_dispatch
    132. 2.132. omit_gdb_pretty_printer_section
    133. 2.133. optimize_attribute
    134. 2.134. packed_bundled_libs
    135. 2.135. panic_runtime
    136. 2.136. platform_intrinsics
    137. 2.137. plugin
    138. 2.138. powerpc_target_feature
    139. 2.139. precise_pointer_size_matching
    140. 2.140. prelude_import
    141. 2.141. proc_macro_hygiene
    142. 2.142. profiler_runtime
    143. 2.143. raw_ref_op
    144. 2.144. register_tool
    145. 2.145. repr_simd
    146. 2.146. repr128
    147. 2.147. return_position_impl_trait_in_trait
    148. 2.148. return_type_notation
    149. 2.149. riscv_target_feature
    150. 2.150. rtm_target_feature
    151. 2.151. rust_cold_cc
    152. 2.152. rustc_allow_const_fn_unstable
    153. 2.153. rustc_attrs
    154. 2.154. rustc_private
    155. 2.155. rustdoc_internals
    156. 2.156. rustdoc_missing_doc_code_examples
    157. 2.157. simd_ffi
    158. 2.158. specialization
    159. 2.159. sse4a_target_feature
    160. 2.160. staged_api
    161. 2.161. start
    162. 2.162. stmt_expr_attributes
    163. 2.163. strict_provenance
    164. 2.164. string_deref_patterns
    165. 2.165. structural_match
    166. 2.166. target_feature_11
    167. 2.167. tbm_target_feature
    168. 2.168. test_2018_feature
    169. 2.169. test_unstable_lint
    170. 2.170. thread_local
    171. 2.171. trait_alias
    172. 2.172. trait_upcasting
    173. 2.173. transmute_generic_consts
    174. 2.174. transparent_unions
    175. 2.175. trivial_bounds
    176. 2.176. try_blocks
    177. 2.177. type_alias_impl_trait
    178. 2.178. type_ascription
    179. 2.179. type_changing_struct_update
    180. 2.180. type_privacy_lints
    181. 2.181. unboxed_closures
    182. 2.182. unix_sigpipe
    183. 2.183. unsafe_pin_internals
    184. 2.184. unsized_fn_params
    185. 2.185. unsized_locals
    186. 2.186. unsized_tuple_coercion
    187. 2.187. used_with_arg
    188. 2.188. wasm_abi
    189. 2.189. wasm_target_feature
    190. 2.190. with_negative_coherence
    191. 2.191. yeet_expr
  4. 3. Library Features
    1. 3.1. absolute_path
    2. 3.2. addr_parse_ascii
    3. 3.3. alloc_error_hook
    4. 3.4. alloc_internals
    5. 3.5. alloc_layout_extra
    6. 3.6. allocator_api
    7. 3.7. arc_unwrap_or_clone
    8. 3.8. array_chunks
    9. 3.9. array_into_iter_constructors
    10. 3.10. array_methods
    11. 3.11. array_try_from_fn
    12. 3.12. array_try_map
    13. 3.13. array_windows
    14. 3.14. as_array_of_cells
    15. 3.15. ascii_char
    16. 3.16. ascii_char_variants
    17. 3.17. assert_matches
    18. 3.18. async_iter_from_iter
    19. 3.19. async_iterator
    20. 3.20. atomic_bool_fetch_not
    21. 3.21. atomic_from_mut
    22. 3.22. atomic_from_ptr
    23. 3.23. backtrace_frames
    24. 3.24. bigint_helper_methods
    25. 3.25. binary_heap_as_slice
    26. 3.26. binary_heap_drain_sorted
    27. 3.27. binary_heap_into_iter_sorted
    28. 3.28. bound_as_ref
    29. 3.29. bound_map
    30. 3.30. box_into_boxed_slice
    31. 3.31. box_into_inner
    32. 3.32. btree_cursors
    33. 3.33. btree_extract_if
    34. 3.34. btreemap_alloc
    35. 3.35. buf_read_has_data_left
    36. 3.36. byte_slice_trim_ascii
    37. 3.37. c_size_t
    38. 3.38. c_void_variant
    39. 3.39. can_vector
    40. 3.40. cell_leak
    41. 3.41. cell_update
    42. 3.42. cfg_accessible
    43. 3.43. cfg_eval
    44. 3.44. char_indices_offset
    45. 3.45. char_internals
    46. 3.46. coerce_unsized
    47. 3.47. concat_bytes
    48. 3.48. concat_idents
    49. 3.49. const_align_of_val
    50. 3.50. const_align_of_val_raw
    51. 3.51. const_align_offset
    52. 3.52. const_alloc_error
    53. 3.53. const_alloc_layout
    54. 3.54. const_arguments_as_str
    55. 3.55. const_array_from_ref
    56. 3.56. const_array_into_iter_constructors
    57. 3.57. const_assert_type2
    58. 3.58. const_assume
    59. 3.59. const_bigint_helper_methods
    60. 3.60. const_black_box
    61. 3.61. const_box
    62. 3.62. const_btree_len
    63. 3.63. const_caller_location
    64. 3.64. const_cell_into_inner
    65. 3.65. const_char_from_u32_unchecked
    66. 3.66. const_collections_with_hasher
    67. 3.67. const_cow_is_borrowed
    68. 3.68. const_cstr_from_ptr
    69. 3.69. const_discriminant
    70. 3.70. const_eval_select
    71. 3.71. const_exact_div
    72. 3.72. const_float_bits_conv
    73. 3.73. const_float_classify
    74. 3.74. const_fmt_arguments_new
    75. 3.75. const_format_args
    76. 3.76. const_hash
    77. 3.77. const_heap
    78. 3.78. const_index_range_slice_index
    79. 3.79. const_inherent_unchecked_arith
    80. 3.80. const_int_unchecked_arith
    81. 3.81. const_intoiterator_identity
    82. 3.82. const_intrinsic_forget
    83. 3.83. const_intrinsic_raw_eq
    84. 3.84. const_io_structs
    85. 3.85. const_ip
    86. 3.86. const_ipv4
    87. 3.87. const_ipv6
    88. 3.88. const_likely
    89. 3.89. const_location_fields
    90. 3.90. const_maybe_uninit_array_assume_init
    91. 3.91. const_maybe_uninit_as_mut_ptr
    92. 3.92. const_maybe_uninit_assume_init
    93. 3.93. const_maybe_uninit_assume_init_read
    94. 3.94. const_maybe_uninit_uninit_array
    95. 3.95. const_maybe_uninit_write
    96. 3.96. const_maybe_uninit_zeroed
    97. 3.97. const_nonnull_new
    98. 3.98. const_num_midpoint
    99. 3.99. const_option
    100. 3.100. const_option_ext
    101. 3.101. const_pin
    102. 3.102. const_pointer_byte_offsets
    103. 3.103. const_pointer_is_aligned
    104. 3.104. const_pref_align_of
    105. 3.105. const_ptr_as_ref
    106. 3.106. const_ptr_is_null
    107. 3.107. const_ptr_sub_ptr
    108. 3.108. const_ptr_write
    109. 3.109. const_range_bounds
    110. 3.110. const_raw_ptr_comparison
    111. 3.111. const_replace
    112. 3.112. const_result
    113. 3.113. const_size_of_val
    114. 3.114. const_size_of_val_raw
    115. 3.115. const_slice_first_last
    116. 3.116. const_slice_from_mut_ptr_range
    117. 3.117. const_slice_from_ptr_range
    118. 3.118. const_slice_from_raw_parts_mut
    119. 3.119. const_slice_from_ref
    120. 3.120. const_slice_index
    121. 3.121. const_slice_is_ascii
    122. 3.122. const_slice_ptr_len
    123. 3.123. const_slice_split_at_mut
    124. 3.124. const_str_from_utf8
    125. 3.125. const_str_from_utf8_unchecked_mut
    126. 3.126. const_swap
    127. 3.127. const_transmute_copy
    128. 3.128. const_type_id
    129. 3.129. const_type_name
    130. 3.130. const_unicode_case_lookup
    131. 3.131. const_unsafecell_get_mut
    132. 3.132. const_waker
    133. 3.133. const_weak_new
    134. 3.134. container_error_extra
    135. 3.135. control_flow_enum
    136. 3.136. convert_float_to_int
    137. 3.137. core_intrinsics
    138. 3.138. core_panic
    139. 3.139. core_private_bignum
    140. 3.140. core_private_diy_float
    141. 3.141. cow_is_borrowed
    142. 3.142. cursor_remaining
    143. 3.143. deadline_api
    144. 3.144. dec2flt
    145. 3.145. default_free_fn
    146. 3.146. derive_clone_copy
    147. 3.147. derive_const
    148. 3.148. derive_eq
    149. 3.149. dir_entry_ext2
    150. 3.150. discriminant_kind
    151. 3.151. dispatch_from_dyn
    152. 3.152. div_duration
    153. 3.153. downcast_unchecked
    154. 3.154. drain_keep_rest
    155. 3.155. duration_constants
    156. 3.156. duration_consts_float
    157. 3.157. edition_panic
    158. 3.158. entry_insert
    159. 3.159. error_generic_member_access
    160. 3.160. error_in_core
    161. 3.161. error_iter
    162. 3.162. error_reporter
    163. 3.163. error_type_id
    164. 3.164. exact_size_is_empty
    165. 3.165. exclusive_wrapper
    166. 3.166. exit_status_error
    167. 3.167. exitcode_exit_method
    168. 3.168. extend_one
    169. 3.169. extract_if
    170. 3.170. fd
    171. 3.171. fd_read
    172. 3.172. file_create_new
    173. 3.173. file_set_times
    174. 3.174. float_minimum_maximum
    175. 3.175. float_next_up_down
    176. 3.176. flt2dec
    177. 3.177. fmt_helpers_for_derive
    178. 3.178. fmt_internals
    179. 3.179. fn_ptr_trait
    180. 3.180. fn_traits
    181. 3.181. forget_unsized
    182. 3.182. format_args_nl
    183. 3.183. fs_try_exists
    184. 3.184. future_join
    185. 3.185. gen_future
    186. 3.186. generator_trait
    187. 3.187. generic_assert_internals
    188. 3.188. get_many_mut
    189. 3.189. get_mut_unchecked
    190. 3.190. hash_extract_if
    191. 3.191. hash_raw_entry
    192. 3.192. hash_set_entry
    193. 3.193. hasher_prefixfree_extras
    194. 3.194. hashmap_internals
    195. 3.195. hint_must_use
    196. 3.196. inplace_iteration
    197. 3.197. int_roundings
    198. 3.198. integer_atomics
    199. 3.199. internal_impls_macro
    200. 3.200. internal_output_capture
    201. 3.201. io_error_downcast
    202. 3.202. io_error_more
    203. 3.203. io_error_other
    204. 3.204. io_error_uncategorized
    205. 3.205. io_slice_advance
    206. 3.206. ip
    207. 3.207. ip_in_core
    208. 3.208. is_ascii_octdigit
    209. 3.209. is_sorted
    210. 3.210. iter_advance_by
    211. 3.211. iter_array_chunks
    212. 3.212. iter_collect_into
    213. 3.213. iter_from_generator
    214. 3.214. iter_intersperse
    215. 3.215. iter_is_partitioned
    216. 3.216. iter_next_chunk
    217. 3.217. iter_order_by
    218. 3.218. iter_partition_in_place
    219. 3.219. iter_repeat_n
    220. 3.220. iterator_try_collect
    221. 3.221. iterator_try_reduce
    222. 3.222. layout_for_ptr
    223. 3.223. lazy_cell
    224. 3.224. lazy_cell_consume
    225. 3.225. liballoc_internals
    226. 3.226. libstd_sys_internals
    227. 3.227. linked_list_cursors
    228. 3.228. linked_list_remove
    229. 3.229. linux_pidfd
    230. 3.230. local_key_cell_methods
    231. 3.231. log_syntax
    232. 3.232. map_entry_replace
    233. 3.233. map_many_mut
    234. 3.234. map_try_insert
    235. 3.235. maybe_uninit_array_assume_init
    236. 3.236. maybe_uninit_as_bytes
    237. 3.237. maybe_uninit_slice
    238. 3.238. maybe_uninit_uninit_array
    239. 3.239. maybe_uninit_uninit_array_transpose
    240. 3.240. maybe_uninit_write_slice
    241. 3.241. mem_copy_fn
    242. 3.242. mutex_unlock
    243. 3.243. mutex_unpoison
    244. 3.244. new_uninit
    245. 3.245. nonzero_ops
    246. 3.246. noop_waker
    247. 3.247. num_midpoint
    248. 3.248. numfmt
    249. 3.249. offset_of
    250. 3.250. once_cell_try
    251. 3.251. one_sided_range
    252. 3.252. option_as_slice
    253. 3.253. option_get_or_insert_default
    254. 3.254. option_zip
    255. 3.255. os_str_bytes
    256. 3.256. panic_abort
    257. 3.257. panic_always_abort
    258. 3.258. panic_backtrace_config
    259. 3.259. panic_can_unwind
    260. 3.260. panic_info_message
    261. 3.261. panic_internals
    262. 3.262. panic_unwind
    263. 3.263. panic_update_hook
    264. 3.264. path_file_prefix
    265. 3.265. pattern
    266. 3.266. peer_credentials_unix_socket
    267. 3.267. pin_deref_mut
    268. 3.268. pointer_byte_offsets
    269. 3.269. pointer_is_aligned
    270. 3.270. pointer_like_trait
    271. 3.271. portable_simd
    272. 3.272. prelude_2024
    273. 3.273. print_internals
    274. 3.274. proc_macro_def_site
    275. 3.275. proc_macro_diagnostic
    276. 3.276. proc_macro_expand
    277. 3.277. proc_macro_internals
    278. 3.278. proc_macro_quote
    279. 3.279. proc_macro_span
    280. 3.280. proc_macro_tracked_env
    281. 3.281. process_exitcode_internals
    282. 3.282. process_internals
    283. 3.283. profiler_runtime_lib
    284. 3.284. provide_any
    285. 3.285. ptr_alignment_type
    286. 3.286. ptr_as_uninit
    287. 3.287. ptr_from_ref
    288. 3.288. ptr_internals
    289. 3.289. ptr_mask
    290. 3.290. ptr_metadata
    291. 3.291. ptr_sub_ptr
    292. 3.292. ptr_to_from_bits
    293. 3.293. pub_crate_should_not_need_unstable_attr
    294. 3.294. raw_os_error_ty
    295. 3.295. raw_os_nonzero
    296. 3.296. raw_slice_split
    297. 3.297. raw_vec_internals
    298. 3.298. read_buf
    299. 3.299. ready_into_inner
    300. 3.300. receiver_trait
    301. 3.301. restricted_std
    302. 3.302. result_flattening
    303. 3.303. result_option_inspect
    304. 3.304. round_char_boundary
    305. 3.305. round_ties_even
    306. 3.306. rt
    307. 3.307. saturating_int_assign_impl
    308. 3.308. saturating_int_impl
    309. 3.309. sealed
    310. 3.310. seek_stream_len
    311. 3.311. set_ptr_value
    312. 3.312. setgroups
    313. 3.313. sgx_platform
    314. 3.314. sized_type_properties
    315. 3.315. slice_as_chunks
    316. 3.316. slice_concat_ext
    317. 3.317. slice_concat_trait
    318. 3.318. slice_first_last_chunk
    319. 3.319. slice_flatten
    320. 3.320. slice_from_ptr_range
    321. 3.321. slice_group_by
    322. 3.322. slice_index_methods
    323. 3.323. slice_internals
    324. 3.324. slice_iter_mut_as_mut_slice
    325. 3.325. slice_partition_dedup
    326. 3.326. slice_pattern
    327. 3.327. slice_ptr_get
    328. 3.328. slice_ptr_len
    329. 3.329. slice_range
    330. 3.330. slice_split_at_unchecked
    331. 3.331. slice_swap_unchecked
    332. 3.332. slice_take
    333. 3.333. solid_ext
    334. 3.334. sort_floats
    335. 3.335. sort_internals
    336. 3.336. spec_option_partial_eq
    337. 3.337. split_array
    338. 3.338. split_as_slice
    339. 3.339. std_internals
    340. 3.340. stdio_makes_pipe
    341. 3.341. stdsimd
    342. 3.342. step_trait
    343. 3.343. str_internals
    344. 3.344. str_split_inclusive_remainder
    345. 3.345. str_split_remainder
    346. 3.346. str_split_whitespace_remainder
    347. 3.347. strict_provenance_atomic_ptr
    348. 3.348. string_extend_from_within
    349. 3.349. string_remove_matches
    350. 3.350. sync_unsafe_cell
    351. 3.351. tcp_linger
    352. 3.352. tcp_quickack
    353. 3.353. tcplistener_into_incoming
    354. 3.354. test
    355. 3.355. thin_box
    356. 3.356. thread_id_value
    357. 3.357. thread_local_internals
    358. 3.358. thread_spawn_unchecked
    359. 3.359. trace_macros
    360. 3.360. track_path
    361. 3.361. transmutability
    362. 3.362. trusted_len
    363. 3.363. trusted_len_next_unchecked
    364. 3.364. trusted_random_access
    365. 3.365. trusted_step
    366. 3.366. try_find
    367. 3.367. try_reserve_kind
    368. 3.368. try_trait_v2
    369. 3.369. try_trait_v2_residual
    370. 3.370. try_trait_v2_yeet
    371. 3.371. tuple_trait
    372. 3.372. type_name_of_val
    373. 3.373. unchecked_math
    374. 3.374. unicode_internals
    375. 3.375. unique_rc_arc
    376. 3.376. unix_chown
    377. 3.377. unix_file_vectored_at
    378. 3.378. unix_set_mark
    379. 3.379. unix_socket_ancillary_data
    380. 3.380. unix_socket_peek
    381. 3.381. unsafe_cell_from_mut
    382. 3.382. unsize
    383. 3.383. unwrap_infallible
    384. 3.384. update_panic_count
    385. 3.385. utf16_extra
    386. 3.386. utf16_extra_const
    387. 3.387. utf8_chunks
    388. 3.388. variant_count
    389. 3.389. vec_into_raw_parts
    390. 3.390. vec_push_within_capacity
    391. 3.391. vec_split_at_spare
    392. 3.392. waker_getters
    393. 3.393. wasi_ext
    394. 3.394. windows_by_handle
    395. 3.395. windows_c
    396. 3.396. windows_handle
    397. 3.397. windows_net
    398. 3.398. windows_process_exit_code_from
    399. 3.399. windows_process_extensions_async_pipes
    400. 3.400. windows_process_extensions_force_quotes
    401. 3.401. windows_process_extensions_main_thread_handle
    402. 3.402. windows_stdio
    403. 3.403. wrapping_int_impl
    404. 3.404. wrapping_next_power_of_two
    405. 3.405. write_all_vectored
    406. 3.406. yeet_desugar_details

The Rust Unstable Book

Library Features