The Unstable Book
1.
Compiler flags
1.1.
emit_stack_sizes
1.2.
profile
1.3.
report_time
2.
Language features
2.1.
aarch64_target_feature
2.2.
abi_amdgpu_kernel
2.3.
abi_efiapi
2.4.
abi_msp430_interrupt
2.5.
abi_ptx
2.6.
abi_thiscall
2.7.
abi_unadjusted
2.8.
abi_vectorcall
2.9.
abi_x86_interrupt
2.10.
adx_target_feature
2.11.
alloc_error_handler
2.12.
allocator_internals
2.13.
allow_fail
2.14.
allow_internal_unsafe
2.15.
allow_internal_unstable
2.16.
arbitrary_enum_discriminant
2.17.
arbitrary_self_types
2.18.
arm_target_feature
2.19.
associated_type_bounds
2.20.
associated_type_defaults
2.21.
async_closure
2.22.
avx512_target_feature
2.23.
box_patterns
2.24.
box_syntax
2.25.
c_variadic
2.26.
cfg_target_has_atomic
2.27.
cfg_target_thread_local
2.28.
cmpxchg16b_target_feature
2.29.
compiler_builtins
2.30.
const_compare_raw_pointers
2.31.
const_extern_fn
2.32.
const_fn
2.33.
const_fn_union
2.34.
const_generics
2.35.
const_in_array_repeat_expressions
2.36.
const_panic
2.37.
const_raw_ptr_deref
2.38.
const_raw_ptr_to_usize_cast
2.39.
const_transmute
2.40.
crate_visibility_modifier
2.41.
custom_inner_attributes
2.42.
custom_test_frameworks
2.43.
decl_macro
2.44.
default_type_parameter_fallback
2.45.
doc_alias
2.46.
doc_cfg
2.47.
doc_keyword
2.48.
doc_masked
2.49.
doc_spotlight
2.50.
dropck_eyepatch
2.51.
exclusive_range_pattern
2.52.
exhaustive_patterns
2.53.
extern_types
2.54.
external_doc
2.55.
f16c_target_feature
2.56.
ffi_returns_twice
2.57.
fundamental
2.58.
generators
2.59.
generic_associated_types
2.60.
hexagon_target_feature
2.61.
impl_trait_in_bindings
2.62.
in_band_lifetimes
2.63.
infer_static_outlives_requirements
2.64.
intrinsics
2.65.
label_break_value
2.66.
lang_items
2.67.
let_chains
2.68.
link_args
2.69.
link_cfg
2.70.
link_llvm_intrinsics
2.71.
linkage
2.72.
lint_reasons
2.73.
main
2.74.
marker_trait_attr
2.75.
member_constraints
2.76.
mips_target_feature
2.77.
mmx_target_feature
2.78.
movbe_target_feature
2.79.
naked_functions
2.80.
needs_panic_runtime
2.81.
never_type
2.82.
nll
2.83.
no_core
2.84.
no_debug
2.85.
non_ascii_idents
2.86.
object_safe_for_dispatch
2.87.
omit_gdb_pretty_printer_section
2.88.
optimize_attribute
2.89.
optin_builtin_traits
2.90.
or_patterns
2.91.
overlapping_marker_traits
2.92.
panic_runtime
2.93.
platform_intrinsics
2.94.
plugin
2.95.
plugin_registrar
2.96.
powerpc_target_feature
2.97.
precise_pointer_size_matching
2.98.
prelude_import
2.99.
proc_macro_hygiene
2.100.
profiler_runtime
2.101.
raw_dylib
2.102.
register_attr
2.103.
register_tool
2.104.
repr_simd
2.105.
repr128
2.106.
rtm_target_feature
2.107.
rustc_attrs
2.108.
rustc_const_unstable
2.109.
rustc_private
2.110.
sanitizer_runtime
2.111.
simd_ffi
2.112.
slice_patterns
2.113.
specialization
2.114.
sse4a_target_feature
2.115.
staged_api
2.116.
start
2.117.
static_nobundle
2.118.
stmt_expr_attributes
2.119.
structural_match
2.120.
tbm_target_feature
2.121.
test_2018_feature
2.122.
thread_local
2.123.
track_caller
2.124.
trait_alias
2.125.
transparent_enums
2.126.
transparent_unions
2.127.
trivial_bounds
2.128.
try_blocks
2.129.
type_alias_impl_trait
2.130.
type_ascription
2.131.
unboxed_closures
2.132.
unsized_locals
2.133.
unsized_tuple_coercion
2.134.
untagged_unions
2.135.
unwind_attributes
2.136.
wasm_target_feature
3.
Library Features
3.1.
alloc_error_hook
3.2.
alloc_internals
3.3.
alloc_layout_extra
3.4.
alloc_prelude
3.5.
allocator_api
3.6.
array_error_internals
3.7.
array_value_iter
3.8.
asm
3.9.
atomic_min_max
3.10.
backtrace
3.11.
binary_heap_drain_sorted
3.12.
binary_heap_into_iter_sorted
3.13.
bool_to_option
3.14.
bound_cloned
3.15.
box_into_pin
3.16.
box_into_raw_non_null
3.17.
boxed_slice_try_from
3.18.
bufreader_seek_relative
3.19.
c_void_variant
3.20.
cell_update
3.21.
char_error_internals
3.22.
clamp
3.23.
cmp_min_max_by
3.24.
coerce_unsized
3.25.
compiler_builtins_lib
3.26.
concat_idents
3.27.
const_cstr_unchecked
3.28.
const_generic_impls_guard
3.29.
const_int_conversion
3.30.
const_int_sign
3.31.
const_ptr_offset_from
3.32.
const_saturating_int_methods
3.33.
const_type_id
3.34.
const_type_name
3.35.
container_error_extra
3.36.
core_intrinsics
3.37.
core_panic
3.38.
core_panic_info
3.39.
core_private_bignum
3.40.
core_private_diy_float
3.41.
cow_is_borrowed
3.42.
deadline_api
3.43.
debug_map_key_value
3.44.
dec2flt
3.45.
derive_clone_copy
3.46.
derive_eq
3.47.
dispatch_from_dyn
3.48.
div_duration
3.49.
drain_filter
3.50.
duration_constants
3.51.
entry_insert
3.52.
error_iter
3.53.
error_type_id
3.54.
exact_size_is_empty
3.55.
extra_log_consts
3.56.
fd
3.57.
fd_read
3.58.
fixed_size_array
3.59.
flt2dec
3.60.
fmt_internals
3.61.
fn_traits
3.62.
foo
3.63.
forget_unsized
3.64.
format_args_nl
3.65.
gen_future
3.66.
generator_trait
3.67.
get_mut_unchecked
3.68.
global_asm
3.69.
hash_raw_entry
3.70.
hash_set_entry
3.71.
hashmap_internals
3.72.
inner_deref
3.73.
int_error_internals
3.74.
int_error_matching
3.75.
integer_atomics
3.76.
internal_uninit_const
3.77.
io_slice_advance
3.78.
ip
3.79.
is_sorted
3.80.
iter_is_partitioned
3.81.
iter_once_with
3.82.
iter_order_by
3.83.
iter_partition_in_place
3.84.
liballoc_internals
3.85.
libstd_io_internals
3.86.
libstd_sys_internals
3.87.
libstd_thread_internals
3.88.
linked_list_extras
3.89.
log_syntax
3.90.
manually_drop_take
3.91.
map_entry_replace
3.92.
map_first_last
3.93.
matches_macro
3.94.
maybe_uninit_extra
3.95.
maybe_uninit_ref
3.96.
maybe_uninit_slice
3.97.
maybe_uninit_slice_assume_init
3.98.
maybe_uninit_uninit_array
3.99.
new_uninit
3.100.
no_more_cas
3.101.
once_is_completed
3.102.
once_poison
3.103.
option_expect_none
3.104.
option_result_contains
3.105.
option_unwrap_none
3.106.
panic_abort
3.107.
panic_info_message
3.108.
panic_internals
3.109.
panic_unwind
3.110.
path_buf_capacity
3.111.
pattern
3.112.
poll_map
3.113.
print_internals
3.114.
proc_macro_def_site
3.115.
proc_macro_diagnostic
3.116.
proc_macro_internals
3.117.
proc_macro_mixed_site
3.118.
proc_macro_quote
3.119.
proc_macro_raw_ident
3.120.
proc_macro_span
3.121.
process_exitcode_placeholder
3.122.
process_internals
3.123.
profiler_runtime_lib
3.124.
ptr_internals
3.125.
ptr_offset_from
3.126.
ptr_wrapping_offset_from
3.127.
range_is_empty
3.128.
raw
3.129.
raw_vec_internals
3.130.
rc_into_raw_non_null
3.131.
read_initializer
3.132.
receiver_trait
3.133.
renamed_spin_loop
3.134.
result_cloned
3.135.
result_contains_err
3.136.
result_copied
3.137.
result_map_or
3.138.
result_map_or_else
3.139.
rt
3.140.
sanitizer_runtime_lib
3.141.
saturating_neg
3.142.
seek_convenience
3.143.
set_stdio
3.144.
sgx_platform
3.145.
shrink_to
3.146.
slice_concat_ext
3.147.
slice_concat_trait
3.148.
slice_from_raw_parts
3.149.
slice_index_methods
3.150.
slice_internals
3.151.
slice_iter_mut_as_slice
3.152.
slice_partition_at_index
3.153.
slice_partition_dedup
3.154.
slice_ptr_range
3.155.
sort_internals
3.156.
std_internals
3.157.
stdsimd
3.158.
step_trait
3.159.
str_internals
3.160.
termination_trait_lib
3.161.
test
3.162.
thread_local_internals
3.163.
thread_spawn_unchecked
3.164.
tidy_test_never_used_anywhere_else
3.165.
toowned_clone_into
3.166.
trace_macros
3.167.
trusted_len
3.168.
try_reserve
3.169.
try_trait
3.170.
unicode_internals
3.171.
unicode_version
3.172.
unsafe_cell_raw_get
3.173.
unsize
3.174.
update_panic_count
3.175.
vec_drain_as_slice
3.176.
vec_into_raw_parts
3.177.
vec_leak
3.178.
vec_remove_item
3.179.
vec_resize_default
3.180.
wait_timeout_until
3.181.
wait_until
3.182.
wasi_ext
3.183.
weak_counts
3.184.
weak_into_raw
3.185.
windows_by_handle
3.186.
windows_c
3.187.
windows_file_type_ext
3.188.
windows_handle
3.189.
windows_net
3.190.
windows_stdio
3.191.
with_options
3.192.
wrapping_int_impl
3.193.
wrapping_next_power_of_two
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Rust
Coal
Navy
Ayu
The Rust Unstable Book
Language features