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

Library Features