The Unstable Book
1.
Compiler flags
1.1.
profile
1.2.
linker_flavor
1.3.
remap_path_prefix
2.
Language features
2.1.
plugin
2.2.
cfg_target_thread_local
2.3.
stmt_expr_attributes
2.4.
macro_reexport
2.5.
overlapping_marker_traits
2.6.
omit_gdb_pretty_printer_section
2.7.
start
2.8.
default_type_parameter_fallback
2.9.
decl_macro
2.10.
quote
2.11.
trace_macros
2.12.
specialization
2.13.
asm
2.14.
abi_x86_interrupt
2.15.
abi_thiscall
2.16.
rvalue_static_promotion
2.17.
allocator
2.18.
allow_internal_unstable
2.19.
linkage
2.20.
placement_in_syntax
2.21.
repr_simd
2.22.
type_ascription
2.23.
conservative_impl_trait
2.24.
concat_idents
2.25.
unboxed_closures
2.26.
link_args
2.27.
proc_macro
2.28.
generic_param_attrs
2.29.
panic_runtime
2.30.
box_patterns
2.31.
abi_vectorcall
2.32.
drop_types_in_const
2.33.
no_core
2.34.
optin_builtin_traits
2.35.
sanitizer_runtime
2.36.
simd
2.37.
compiler_builtins
2.38.
needs_panic_runtime
2.39.
rustc_attrs
2.40.
plugin_registrar
2.41.
macro_vis_matcher
2.42.
on_unimplemented
2.43.
lang_items
2.44.
exclusive_range_pattern
2.45.
dropck_parametricity
2.46.
prelude_import
2.47.
global_asm
2.48.
untagged_unions
2.49.
const_fn
2.50.
abi_ptx
2.51.
link_llvm_intrinsics
2.52.
no_debug
2.53.
i128_type
2.54.
unwind_attributes
2.55.
structural_match
2.56.
log_syntax
2.57.
cfg_target_feature
2.58.
slice_patterns
2.59.
associated_consts
2.60.
advanced_slice_patterns
2.61.
inclusive_range_syntax
2.62.
abi_sysv64
2.63.
abi_msp430_interrupt
2.64.
catch_expr
2.65.
const_indexing
2.66.
profiler_runtime
2.67.
dropck_eyepatch
2.68.
naked_functions
2.69.
fundamental
2.70.
platform_intrinsics
2.71.
main
2.72.
associated_type_defaults
2.73.
attr_literals
2.74.
box_syntax
2.75.
abi_unadjusted
2.76.
static_nobundle
2.77.
used
2.78.
target_feature
2.79.
never_type
2.80.
intrinsics
2.81.
cfg_target_has_atomic
2.82.
simd_ffi
2.83.
cfg_target_vendor
2.84.
custom_attribute
2.85.
link_cfg
2.86.
custom_derive
2.87.
repr_align
2.88.
thread_local
2.89.
use_extern_macros
2.90.
staged_api
2.91.
needs_allocator
2.92.
non_ascii_idents
2.93.
rustc_diagnostic_macros
3.
Library Features
3.1.
iter_rfind
3.2.
fd_read
3.3.
sanitizer_runtime_lib
3.4.
exact_size_is_empty
3.5.
flt2dec
3.6.
placement_new_protocol
3.7.
update_panic_count
3.8.
from_utf8_error_as_bytes
3.9.
unicode
3.10.
osstring_shrink_to_fit
3.11.
mpsc_select
3.12.
try_trait
3.13.
linked_list_extras
3.14.
libstd_io_internals
3.15.
range_contains
3.16.
alloc_jemalloc
3.17.
rand
3.18.
pattern
3.19.
once_poison
3.20.
hint_core_should_pause
3.21.
windows_c
3.22.
fmt_flags_align
3.23.
sort_unstable
3.24.
fixed_size_array
3.25.
profiler_runtime_lib
3.26.
slice_rotate
3.27.
ascii_ctype
3.28.
unique
3.29.
panic_unwind
3.30.
error_type_id
3.31.
placement_in
3.32.
slice_concat_ext
3.33.
char_escape_debug
3.34.
never_type_impls
3.35.
box_heap
3.36.
vec_resize_default
3.37.
fnbox
3.38.
raw
3.39.
fd
3.40.
i128
3.41.
alloc
3.42.
question_mark_carrier
3.43.
rt
3.44.
step_by
3.45.
try_from
3.46.
core_char_ext
3.47.
core_panic
3.48.
proc_macro_internals
3.49.
c_void_variant
3.50.
core_slice_ext
3.51.
io
3.52.
toowned_clone_into
3.53.
into_boxed_c_str
3.54.
str_mut_extras
3.55.
libstd_thread_internals
3.56.
derive_eq
3.57.
utf8_error_error_len
3.58.
dec2flt
3.59.
windows_net
3.60.
command_envs
3.61.
libstd_sys_internals
3.62.
io_error_internals
3.63.
future_atomic_orderings
3.64.
float_bits_conv
3.65.
needs_drop
3.66.
compiler_builtins_lib
3.67.
lookup_host
3.68.
manually_drop
3.69.
collection_placement
3.70.
int_error_internals
3.71.
str_internals
3.72.
alloc_system
3.73.
core_str_ext
3.74.
rustc_private
3.75.
ord_max_min
3.76.
integer_atomics
3.77.
panic_abort
3.78.
sort_internals
3.79.
concat_idents_macro
3.80.
derive_clone_copy
3.81.
thread_id
3.82.
iterator_step_by
3.83.
unsize
3.84.
windows_stdio
3.85.
splice
3.86.
vec_remove_item
3.87.
core_private_diy_float
3.88.
more_io_inner_methods
3.89.
fused
3.90.
str_checked_slicing
3.91.
discriminant_value
3.92.
oom
3.93.
into_boxed_path
3.94.
nonzero
3.95.
sip_hash_13
3.96.
ip
3.97.
str_box_extras
3.98.
inclusive_range
3.99.
windows_handle
3.100.
heap_api
3.101.
set_stdio
3.102.
fmt_internals
3.103.
decode_utf8
3.104.
thread_local_internals
3.105.
compiler_fences
3.106.
core_private_bignum
3.107.
core_intrinsics
3.108.
shared
3.109.
into_boxed_os_str
3.110.
print_internals
3.111.
option_entry
3.112.
reverse_cmp_key
3.113.
test
3.114.
str_escape
3.115.
get_type_id
3.116.
fn_traits
3.117.
coerce_unsized
3.118.
step_trait
3.119.
as_c_str
3.120.
core_float
3.121.
n16
3.122.
thread_local_state
3.123.
collections_range
3.124.
trusted_len
3.125.
slice_rsplit
3.126.
offset_to
3.127.
slice_get_slice
sip_hash_13
The tracking issue for this feature is:
#29754