1. The Unstable Book
  2. 1. Compiler flags
    1. 1.1. linker_flavor
    2. 1.2. profile
  3. 2. Language features
    1. 2.1. aarch64_target_feature
    2. 2.2. abi_msp430_interrupt
    3. 2.3. abi_ptx
    4. 2.4. abi_thiscall
    5. 2.5. abi_unadjusted
    6. 2.6. abi_vectorcall
    7. 2.7. abi_x86_interrupt
    8. 2.8. allocator_internals
    9. 2.9. allow_fail
    10. 2.10. allow_internal_unsafe
    11. 2.11. allow_internal_unstable
    12. 2.12. arbitrary_self_types
    13. 2.13. arm_target_feature
    14. 2.14. asm
    15. 2.15. associated_type_defaults
    16. 2.16. attr_literals
    17. 2.17. avx512_target_feature
    18. 2.18. box_patterns
    19. 2.19. box_syntax
    20. 2.20. catch_expr
    21. 2.21. cfg_target_has_atomic
    22. 2.22. cfg_target_thread_local
    23. 2.23. cfg_target_vendor
    24. 2.24. compiler_builtins
    25. 2.25. concat_idents
    26. 2.26. const_fn
    27. 2.27. const_let
    28. 2.28. crate_in_paths
    29. 2.29. crate_visibility_modifier
    30. 2.30. custom_attribute
    31. 2.31. custom_derive
    32. 2.32. decl_macro
    33. 2.33. default_type_parameter_fallback
    34. 2.34. doc_alias
    35. 2.35. doc_cfg
    36. 2.36. doc_keyword
    37. 2.37. doc_masked
    38. 2.38. doc_spotlight
    39. 2.39. dropck_eyepatch
    40. 2.40. dropck_parametricity
    41. 2.41. exclusive_range_pattern
    42. 2.42. exhaustive_patterns
    43. 2.43. extern_absolute_paths
    44. 2.44. extern_in_paths
    45. 2.45. extern_prelude
    46. 2.46. extern_types
    47. 2.47. external_doc
    48. 2.48. fundamental
    49. 2.49. generators
    50. 2.50. generic_associated_types
    51. 2.51. global_asm
    52. 2.52. hexagon_target_feature
    53. 2.53. if_while_or_patterns
    54. 2.54. in_band_lifetimes
    55. 2.55. infer_outlives_requirements
    56. 2.56. intrinsics
    57. 2.57. label_break_value
    58. 2.58. lang_items
    59. 2.59. link_args
    60. 2.60. link_cfg
    61. 2.61. link_llvm_intrinsics
    62. 2.62. linkage
    63. 2.63. log_syntax
    64. 2.64. macro_at_most_once_rep
    65. 2.65. macro_literal_matcher
    66. 2.66. macro_vis_matcher
    67. 2.67. macros_in_extern
    68. 2.68. main
    69. 2.69. mips_target_feature
    70. 2.70. mmx_target_feature
    71. 2.71. naked_functions
    72. 2.72. needs_allocator
    73. 2.73. needs_panic_runtime
    74. 2.74. never_type
    75. 2.75. nll
    76. 2.76. no_core
    77. 2.77. no_debug
    78. 2.78. non_ascii_idents
    79. 2.79. non_exhaustive
    80. 2.80. non_modrs_mods
    81. 2.81. omit_gdb_pretty_printer_section
    82. 2.82. on_unimplemented
    83. 2.83. optin_builtin_traits
    84. 2.84. overlapping_marker_traits
    85. 2.85. panic_implementation
    86. 2.86. panic_runtime
    87. 2.87. pattern_parentheses
    88. 2.88. platform_intrinsics
    89. 2.89. plugin
    90. 2.90. plugin_registrar
    91. 2.91. powerpc_target_feature
    92. 2.92. prelude_import
    93. 2.93. proc_macro
    94. 2.94. proc_macro_expr
    95. 2.95. proc_macro_gen
    96. 2.96. proc_macro_mod
    97. 2.97. proc_macro_non_items
    98. 2.98. proc_macro_path_invoc
    99. 2.99. profiler_runtime
    100. 2.100. quote
    101. 2.101. raw_identifiers
    102. 2.102. repr_packed
    103. 2.103. repr_simd
    104. 2.104. repr128
    105. 2.105. rustc_attrs
    106. 2.106. rustc_const_unstable
    107. 2.107. rustc_diagnostic_macros
    108. 2.108. sanitizer_runtime
    109. 2.109. simd_ffi
    110. 2.110. slice_patterns
    111. 2.111. specialization
    112. 2.112. sse4a_target_feature
    113. 2.113. staged_api
    114. 2.114. start
    115. 2.115. static_nobundle
    116. 2.116. stmt_expr_attributes
    117. 2.117. structural_match
    118. 2.118. tbm_target_feature
    119. 2.119. thread_local
    120. 2.120. tool_attributes
    121. 2.121. trace_macros
    122. 2.122. trait_alias
    123. 2.123. trivial_bounds
    124. 2.124. type_ascription
    125. 2.125. unboxed_closures
    126. 2.126. underscore_imports
    127. 2.127. unsized_tuple_coercion
    128. 2.128. untagged_unions
    129. 2.129. unwind_attributes
    130. 2.130. use_extern_macros
    131. 2.131. used
    132. 2.132. wasm_custom_section
    133. 2.133. wasm_import_module
  4. 3. Library Features
    1. 3.1. align_offset
    2. 3.2. alloc
    3. 3.3. alloc_error_hook
    4. 3.4. alloc_internals
    5. 3.5. alloc_jemalloc
    6. 3.6. alloc_system
    7. 3.7. allocator_api
    8. 3.8. array_error_internals
    9. 3.9. ascii_ctype
    10. 3.10. atomic_min_max
    11. 3.11. box_into_raw_non_null
    12. 3.12. bufreader_buffer
    13. 3.13. bufreader_is_empty
    14. 3.14. bufreader_seek_relative
    15. 3.15. c_void_variant
    16. 3.16. cell_update
    17. 3.17. char_error_internals
    18. 3.18. coerce_unsized
    19. 3.19. compiler_builtins_lib
    20. 3.20. concat_idents_macro
    21. 3.21. const_int_ops
    22. 3.22. const_manually_drop_new
    23. 3.23. const_slice_as_ptr
    24. 3.24. const_slice_len
    25. 3.25. const_str_as_bytes
    26. 3.26. const_str_as_ptr
    27. 3.27. const_str_len
    28. 3.28. const_string_new
    29. 3.29. const_type_id
    30. 3.30. const_vec_new
    31. 3.31. core_intrinsics
    32. 3.32. core_panic
    33. 3.33. core_panic_info
    34. 3.34. core_private_bignum
    35. 3.35. core_private_diy_float
    36. 3.36. deadline_api
    37. 3.37. dec2flt
    38. 3.38. decode_utf8
    39. 3.39. derive_clone_copy
    40. 3.40. derive_eq
    41. 3.41. drain_filter
    42. 3.42. duration_as_u128
    43. 3.43. duration_getters
    44. 3.44. error_type_id
    45. 3.45. euclidean_division
    46. 3.46. exact_chunks
    47. 3.47. exact_size_is_empty
    48. 3.48. extra_log_consts
    49. 3.49. fd
    50. 3.50. fd_read
    51. 3.51. fixed_size_array
    52. 3.52. flt2dec
    53. 3.53. fmt_internals
    54. 3.54. fn_traits
    55. 3.55. fnbox
    56. 3.56. future_atomic_orderings
    57. 3.57. futures_api
    58. 3.58. generator_trait
    59. 3.59. get_type_id
    60. 3.60. hashmap_internals
    61. 3.61. int_error_internals
    62. 3.62. int_to_from_bytes
    63. 3.63. integer_atomics
    64. 3.64. io
    65. 3.65. io_error_internals
    66. 3.66. ip
    67. 3.67. ip_constructors
    68. 3.68. iterator_find_map
    69. 3.69. iterator_flatten
    70. 3.70. libstd_io_internals
    71. 3.71. libstd_sys_internals
    72. 3.72. libstd_thread_internals
    73. 3.73. linked_list_extras
    74. 3.74. map_entry_replace
    75. 3.75. map_get_key_value
    76. 3.76. mpsc_select
    77. 3.77. n16
    78. 3.78. no_more_cas
    79. 3.79. no_panic_pow
    80. 3.80. offset_to
    81. 3.81. once_poison
    82. 3.82. option_xor
    83. 3.83. panic_abort
    84. 3.84. panic_info_message
    85. 3.85. panic_internals
    86. 3.86. panic_unwind
    87. 3.87. pattern
    88. 3.88. pin
    89. 3.89. print_internals
    90. 3.90. proc_macro_internals
    91. 3.91. process_exitcode_placeholder
    92. 3.92. process_internals
    93. 3.93. profiler_runtime_lib
    94. 3.94. ptr_internals
    95. 3.95. ptr_offset_from
    96. 3.96. ptr_wrapping_offset_from
    97. 3.97. range_contains
    98. 3.98. range_is_empty
    99. 3.99. raw
    100. 3.100. rc_downcast
    101. 3.101. read_initializer
    102. 3.102. refcell_map_split
    103. 3.103. refcell_replace_swap
    104. 3.104. repeat_generic_slice
    105. 3.105. reverse_bits
    106. 3.106. rt
    107. 3.107. rustc_private
    108. 3.108. rustc_stack_internals
    109. 3.109. sanitizer_runtime_lib
    110. 3.110. set_stdio
    111. 3.111. shrink_to
    112. 3.112. slice_align_to
    113. 3.113. slice_concat_ext
    114. 3.114. slice_index_methods
    115. 3.115. slice_internals
    116. 3.116. slice_sort_by_cached_key
    117. 3.117. sort_internals
    118. 3.118. std_internals
    119. 3.119. stdsimd
    120. 3.120. step_trait
    121. 3.121. str_escape
    122. 3.122. str_internals
    123. 3.123. termination_trait_lib
    124. 3.124. test
    125. 3.125. thread_local_internals
    126. 3.126. toowned_clone_into
    127. 3.127. transpose_result
    128. 3.128. trusted_len
    129. 3.129. try_from
    130. 3.130. try_reserve
    131. 3.131. try_trait
    132. 3.132. unicode
    133. 3.133. unicode_internals
    134. 3.134. unicode_version
    135. 3.135. unsize
    136. 3.136. update_panic_count
    137. 3.137. vec_remove_item
    138. 3.138. vec_resize_default
    139. 3.139. vec_resize_with
    140. 3.140. wait_timeout_until
    141. 3.141. wait_until
    142. 3.142. windows_c
    143. 3.143. windows_file_type_ext
    144. 3.144. windows_handle
    145. 3.145. windows_net
    146. 3.146. windows_stdio
    147. 3.147. wrapping_int_impl
    148. 3.148. wrapping_next_power_of_two

Library Features