d8843d9d82
TrustedRandomAaccess specialization composes incorrectly for nested iter::Zips I found this while working on improvements for TRA. After partially consuming a Zip adapter and then wrapping it into another Zip where the adapters use their `TrustedRandomAccess` specializations leads to the outer adapter returning elements which should have already been consumed. If the optimizer gets tripped up by the addition this might affect performance for chained `zip()` iterators even when the inner one is not partially advanced but it would require more extensive fixes to `TrustedRandomAccess` to communicate those offsets earlier. Included test fails on nightly, [playground link](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=24fa1edf8a104ff31f5a24830593b01f)
120 lines
2.7 KiB
Rust
120 lines
2.7 KiB
Rust
#![feature(alloc_layout_extra)]
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#![feature(array_chunks)]
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#![feature(array_from_ref)]
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#![feature(array_methods)]
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#![feature(array_map)]
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#![feature(array_windows)]
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#![feature(bool_to_option)]
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#![feature(bound_cloned)]
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#![feature(box_syntax)]
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#![feature(cell_update)]
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#![feature(cfg_panic)]
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#![feature(cfg_target_has_atomic)]
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#![feature(const_assume)]
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#![feature(const_cell_into_inner)]
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#![feature(const_maybe_uninit_assume_init)]
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#![feature(const_ptr_read)]
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#![feature(const_ptr_offset)]
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#![feature(core_intrinsics)]
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#![feature(core_private_bignum)]
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#![feature(core_private_diy_float)]
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#![feature(debug_non_exhaustive)]
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#![feature(dec2flt)]
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#![feature(div_duration)]
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#![feature(duration_consts_2)]
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#![feature(duration_constants)]
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#![feature(duration_saturating_ops)]
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#![feature(duration_zero)]
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#![feature(exact_size_is_empty)]
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#![feature(fixed_size_array)]
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#![feature(flt2dec)]
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#![feature(fmt_internals)]
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#![feature(hashmap_internals)]
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#![feature(try_find)]
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#![feature(is_sorted)]
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#![feature(pattern)]
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#![feature(raw)]
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#![feature(sort_internals)]
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#![feature(slice_partition_at_index)]
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#![feature(maybe_uninit_uninit_array)]
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#![feature(maybe_uninit_array_assume_init)]
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#![feature(maybe_uninit_extra)]
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#![feature(maybe_uninit_write_slice)]
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#![feature(min_specialization)]
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#![feature(step_trait)]
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#![feature(step_trait_ext)]
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#![feature(str_internals)]
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#![feature(test)]
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#![feature(trusted_len)]
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#![feature(try_trait)]
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#![feature(slice_internals)]
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#![feature(slice_partition_dedup)]
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#![feature(int_error_matching)]
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#![feature(array_value_iter)]
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#![feature(iter_advance_by)]
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#![feature(iter_partition_in_place)]
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#![feature(iter_intersperse)]
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#![feature(iter_is_partitioned)]
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#![feature(iter_order_by)]
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#![feature(cmp_min_max_by)]
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#![feature(iter_map_while)]
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#![feature(const_mut_refs)]
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#![feature(const_pin)]
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#![feature(const_slice_from_raw_parts)]
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#![feature(const_raw_ptr_deref)]
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#![feature(never_type)]
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#![feature(unwrap_infallible)]
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#![feature(option_unwrap_none)]
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#![feature(peekable_next_if)]
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#![feature(peekable_peek_mut)]
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#![feature(partition_point)]
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#![feature(once_cell)]
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#![feature(unsafe_block_in_unsafe_fn)]
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#![feature(int_bits_const)]
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#![feature(nonzero_leading_trailing_zeros)]
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#![feature(const_option)]
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#![feature(integer_atomics)]
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#![feature(slice_group_by)]
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#![feature(trusted_random_access)]
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#![deny(unsafe_op_in_unsafe_fn)]
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extern crate test;
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mod alloc;
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mod any;
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mod array;
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mod ascii;
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mod atomic;
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mod bool;
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mod cell;
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mod char;
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mod clone;
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mod cmp;
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#[cfg(not(bootstrap))]
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mod const_ptr;
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mod fmt;
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mod hash;
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mod intrinsics;
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mod iter;
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mod lazy;
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mod macros;
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mod manually_drop;
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mod mem;
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mod nonzero;
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mod num;
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mod ops;
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mod option;
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mod pattern;
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mod pin;
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mod ptr;
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mod result;
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mod slice;
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mod str;
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mod str_lossy;
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mod task;
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mod time;
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mod tuple;
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mod unicode;
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