1. The Unstable Book
  2. 1. Compiler flags
    1. 1.1. emit_stack_sizes
    2. 1.2. profile
  3. 2. Language features
    1. 2.1. aarch64_target_feature
    2. 2.2. abi_amdgpu_kernel
    3. 2.3. abi_msp430_interrupt
    4. 2.4. abi_ptx
    5. 2.5. abi_thiscall
    6. 2.6. abi_unadjusted
    7. 2.7. abi_vectorcall
    8. 2.8. abi_x86_interrupt
    9. 2.9. adx_target_feature
    10. 2.10. alloc_error_handler
    11. 2.11. allocator_internals
    12. 2.12. allow_fail
    13. 2.13. allow_internal_unsafe
    14. 2.14. allow_internal_unstable
    15. 2.15. arbitrary_enum_discriminant
    16. 2.16. arbitrary_self_types
    17. 2.17. arm_target_feature
    18. 2.18. associated_type_bounds
    19. 2.19. associated_type_defaults
    20. 2.20. async_closure
    21. 2.21. avx512_target_feature
    22. 2.22. box_patterns
    23. 2.23. box_syntax
    24. 2.24. c_variadic
    25. 2.25. cfg_doctest
    26. 2.26. cfg_target_has_atomic
    27. 2.27. cfg_target_thread_local
    28. 2.28. cmpxchg16b_target_feature
    29. 2.29. compiler_builtins
    30. 2.30. const_compare_raw_pointers
    31. 2.31. const_constructor
    32. 2.32. const_fn
    33. 2.33. const_fn_union
    34. 2.34. const_generics
    35. 2.35. const_in_array_repeat_expressions
    36. 2.36. const_panic
    37. 2.37. const_raw_ptr_deref
    38. 2.38. const_raw_ptr_to_usize_cast
    39. 2.39. const_transmute
    40. 2.40. crate_visibility_modifier
    41. 2.41. custom_attribute
    42. 2.42. custom_inner_attributes
    43. 2.43. custom_test_frameworks
    44. 2.44. decl_macro
    45. 2.45. default_type_parameter_fallback
    46. 2.46. doc_alias
    47. 2.47. doc_cfg
    48. 2.48. doc_keyword
    49. 2.49. doc_masked
    50. 2.50. doc_spotlight
    51. 2.51. dropck_eyepatch
    52. 2.52. exclusive_range_pattern
    53. 2.53. exhaustive_patterns
    54. 2.54. extern_types
    55. 2.55. external_doc
    56. 2.56. f16c_target_feature
    57. 2.57. ffi_returns_twice
    58. 2.58. fundamental
    59. 2.59. generators
    60. 2.60. generic_associated_types
    61. 2.61. hexagon_target_feature
    62. 2.62. impl_trait_in_bindings
    63. 2.63. in_band_lifetimes
    64. 2.64. infer_static_outlives_requirements
    65. 2.65. intrinsics
    66. 2.66. label_break_value
    67. 2.67. lang_items
    68. 2.68. let_chains
    69. 2.69. link_args
    70. 2.70. link_cfg
    71. 2.71. link_llvm_intrinsics
    72. 2.72. linkage
    73. 2.73. lint_reasons
    74. 2.74. macros_in_extern
    75. 2.75. main
    76. 2.76. marker_trait_attr
    77. 2.77. member_constraints
    78. 2.78. mips_target_feature
    79. 2.79. mmx_target_feature
    80. 2.80. movbe_target_feature
    81. 2.81. naked_functions
    82. 2.82. needs_panic_runtime
    83. 2.83. never_type
    84. 2.84. nll
    85. 2.85. no_core
    86. 2.86. no_debug
    87. 2.87. non_ascii_idents
    88. 2.88. non_exhaustive
    89. 2.89. omit_gdb_pretty_printer_section
    90. 2.90. on_unimplemented
    91. 2.91. optimize_attribute
    92. 2.92. optin_builtin_traits
    93. 2.93. or_patterns
    94. 2.94. overlapping_marker_traits
    95. 2.95. panic_runtime
    96. 2.96. platform_intrinsics
    97. 2.97. plugin
    98. 2.98. plugin_registrar
    99. 2.99. powerpc_target_feature
    100. 2.100. precise_pointer_size_matching
    101. 2.101. prelude_import
    102. 2.102. proc_macro_hygiene
    103. 2.103. profiler_runtime
    104. 2.104. re_rebalance_coherence
    105. 2.105. repr_simd
    106. 2.106. repr128
    107. 2.107. rtm_target_feature
    108. 2.108. rustc_attrs
    109. 2.109. rustc_const_unstable
    110. 2.110. rustc_private
    111. 2.111. sanitizer_runtime
    112. 2.112. simd_ffi
    113. 2.113. slice_patterns
    114. 2.114. specialization
    115. 2.115. sse4a_target_feature
    116. 2.116. staged_api
    117. 2.117. start
    118. 2.118. static_nobundle
    119. 2.119. stmt_expr_attributes
    120. 2.120. structural_match
    121. 2.121. tbm_target_feature
    122. 2.122. test_2018_feature
    123. 2.123. thread_local
    124. 2.124. trait_alias
    125. 2.125. transparent_enums
    126. 2.126. transparent_unions
    127. 2.127. trivial_bounds
    128. 2.128. try_blocks
    129. 2.129. type_alias_impl_trait
    130. 2.130. type_ascription
    131. 2.131. unboxed_closures
    132. 2.132. unsized_locals
    133. 2.133. unsized_tuple_coercion
    134. 2.134. untagged_unions
    135. 2.135. unwind_attributes
    136. 2.136. wasm_target_feature
  4. 3. Library Features
    1. 3.1. alloc_error_hook
    2. 3.2. alloc_internals
    3. 3.3. alloc_layout_extra
    4. 3.4. alloc_prelude
    5. 3.5. allocator_api
    6. 3.6. array_error_internals
    7. 3.7. asm
    8. 3.8. atomic_min_max
    9. 3.9. backtrace
    10. 3.10. bool_to_option
    11. 3.11. bound_cloned
    12. 3.12. box_into_pin
    13. 3.13. box_into_raw_non_null
    14. 3.14. boxed_slice_try_from
    15. 3.15. bufreader_seek_relative
    16. 3.16. c_void_variant
    17. 3.17. cell_update
    18. 3.18. char_error_internals
    19. 3.19. clamp
    20. 3.20. cmp_min_max_by
    21. 3.21. coerce_unsized
    22. 3.22. compiler_builtins_lib
    23. 3.23. concat_idents
    24. 3.24. const_cstr_unchecked
    25. 3.25. const_generic_impls_guard
    26. 3.26. const_int_conversion
    27. 3.27. const_int_sign
    28. 3.28. const_saturating_int_methods
    29. 3.29. const_slice_len
    30. 3.30. const_str_as_bytes
    31. 3.31. const_str_len
    32. 3.32. const_string_new
    33. 3.33. const_type_id
    34. 3.34. const_type_name
    35. 3.35. const_vec_new
    36. 3.36. container_error_extra
    37. 3.37. core_intrinsics
    38. 3.38. core_panic
    39. 3.39. core_panic_info
    40. 3.40. core_private_bignum
    41. 3.41. core_private_diy_float
    42. 3.42. deadline_api
    43. 3.43. debug_map_key_value
    44. 3.44. dec2flt
    45. 3.45. derive_clone_copy
    46. 3.46. derive_eq
    47. 3.47. dispatch_from_dyn
    48. 3.48. div_duration
    49. 3.49. drain_filter
    50. 3.50. duration_constants
    51. 3.51. error_iter
    52. 3.52. error_type_id
    53. 3.53. exact_size_is_empty
    54. 3.54. extra_log_consts
    55. 3.55. fd
    56. 3.56. fd_read
    57. 3.57. fixed_size_array
    58. 3.58. float_to_from_bytes
    59. 3.59. flt2dec
    60. 3.60. fmt_internals
    61. 3.61. fn_traits
    62. 3.62. foo
    63. 3.63. forget_unsized
    64. 3.64. format_args_nl
    65. 3.65. gen_future
    66. 3.66. generator_trait
    67. 3.67. get_mut_unchecked
    68. 3.68. global_asm
    69. 3.69. hash_raw_entry
    70. 3.70. hash_set_entry
    71. 3.71. hashmap_internals
    72. 3.72. inner_deref
    73. 3.73. int_error_internals
    74. 3.74. int_error_matching
    75. 3.75. integer_atomics
    76. 3.76. internal_uninit_const
    77. 3.77. io_slice_advance
    78. 3.78. ip
    79. 3.79. is_sorted
    80. 3.80. iter_is_partitioned
    81. 3.81. iter_once_with
    82. 3.82. iter_order_by
    83. 3.83. iter_partition_in_place
    84. 3.84. liballoc_internals
    85. 3.85. libstd_io_internals
    86. 3.86. libstd_sys_internals
    87. 3.87. libstd_thread_internals
    88. 3.88. linked_list_extras
    89. 3.89. log_syntax
    90. 3.90. manually_drop_take
    91. 3.91. map_entry_replace
    92. 3.92. map_get_key_value
    93. 3.93. maybe_uninit_extra
    94. 3.94. maybe_uninit_ref
    95. 3.95. maybe_uninit_slice
    96. 3.96. mem_take
    97. 3.97. new_uninit
    98. 3.98. no_more_cas
    99. 3.99. once_is_completed
    100. 3.100. once_poison
    101. 3.101. option_expect_none
    102. 3.102. option_flattening
    103. 3.103. option_result_contains
    104. 3.104. option_unwrap_none
    105. 3.105. panic_abort
    106. 3.106. panic_info_message
    107. 3.107. panic_internals
    108. 3.108. panic_unwind
    109. 3.109. path_buf_capacity
    110. 3.110. pattern
    111. 3.111. poll_map
    112. 3.112. print_internals
    113. 3.113. proc_macro_def_site
    114. 3.114. proc_macro_diagnostic
    115. 3.115. proc_macro_internals
    116. 3.116. proc_macro_quote
    117. 3.117. proc_macro_raw_ident
    118. 3.118. proc_macro_span
    119. 3.119. process_exitcode_placeholder
    120. 3.120. process_internals
    121. 3.121. profiler_runtime_lib
    122. 3.122. ptr_internals
    123. 3.123. ptr_offset_from
    124. 3.124. ptr_wrapping_offset_from
    125. 3.125. range_is_empty
    126. 3.126. raw
    127. 3.127. raw_vec_internals
    128. 3.128. rc_into_raw_non_null
    129. 3.129. read_initializer
    130. 3.130. receiver_trait
    131. 3.131. renamed_spin_loop
    132. 3.132. repeat_generic_slice
    133. 3.133. result_cloned
    134. 3.134. result_contains_err
    135. 3.135. result_copied
    136. 3.136. result_map_or_else
    137. 3.137. rt
    138. 3.138. sanitizer_runtime_lib
    139. 3.139. saturating_neg
    140. 3.140. seek_convenience
    141. 3.141. set_stdio
    142. 3.142. sgx_platform
    143. 3.143. shrink_to
    144. 3.144. slice_concat_ext
    145. 3.145. slice_concat_trait
    146. 3.146. slice_from_raw_parts
    147. 3.147. slice_index_methods
    148. 3.148. slice_internals
    149. 3.149. slice_iter_mut_as_slice
    150. 3.150. slice_partition_at_index
    151. 3.151. slice_partition_dedup
    152. 3.152. sort_internals
    153. 3.153. std_internals
    154. 3.154. stdsimd
    155. 3.155. step_trait
    156. 3.156. str_internals
    157. 3.157. termination_trait_lib
    158. 3.158. test
    159. 3.159. thread_local_internals
    160. 3.160. thread_spawn_unchecked
    161. 3.161. tidy_test_never_used_anywhere_else
    162. 3.162. todo_macro
    163. 3.163. toowned_clone_into
    164. 3.164. trace_macros
    165. 3.165. trusted_len
    166. 3.166. try_reserve
    167. 3.167. try_trait
    168. 3.168. udp_peer_addr
    169. 3.169. unicode_internals
    170. 3.170. unicode_version
    171. 3.171. unsize
    172. 3.172. update_panic_count
    173. 3.173. vec_drain_as_slice
    174. 3.174. vec_leak
    175. 3.175. vec_remove_item
    176. 3.176. vec_resize_default
    177. 3.177. wait_timeout_until
    178. 3.178. wait_until
    179. 3.179. wasi_ext
    180. 3.180. weak_counts
    181. 3.181. weak_into_raw
    182. 3.182. windows_by_handle
    183. 3.183. windows_c
    184. 3.184. windows_file_type_ext
    185. 3.185. windows_handle
    186. 3.186. windows_net
    187. 3.187. windows_stdio
    188. 3.188. wrapping_int_impl
    189. 3.189. wrapping_next_power_of_two

The Rust Unstable Book

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