Rollup of 7 pull requests #48040
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Rollup of 7 pull requests #48040
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kennytm
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Feb 6, 2018
kennytm
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- Successful merges: Document std::os::raw. #46962, libtest: Replace panics with error messages #47986, Override try_[r]fold for RangeInclusive #48012, Use time crate in bootstrap dist instead of date #48013, Document that associated constants prevent a trait from being made into an object #48026, config.toml.example: fix typos. #48031, proc_macro: don't panic parsing ..= (fix #47950) #48036
- Failed merges:
Because the last item needs special handling, it seems that LLVM has trouble canonicalizing the loops in external iteration. With the override, it becomes obvious that the start==end case exits the loop (as opposed to the one *after* that exiting the loop in external iteration).
Most of them were found by codespell: https://github.com/lucasdemarchi/codespell
…eavus Document std::os::raw. This adds a brief explanation to each type and its definition according to C. This also helps clarify that the definitions of the types, as described by rustdoc, are not necessarily the same from platform to platform.
…lacrum libtest: Replace panics with error messages This replaces explicit panics on failures in libtest with prints to stderr. Where "failures" == CLI argument parsing and such Before: ``` $ ./foo-stable --not-an-option thread 'main' panicked at '"Unrecognized option: \'not-an-option\'"', libtest/lib.rs:251:27 note: Run with `RUST_BACKTRACE=1` for a backtrace. ``` After: ``` $ ./foo-nightly --not-an-option error: Unrecognized option: 'not-an-option' ```
…, r=alexcrichton Override try_[r]fold for RangeInclusive Because the last item needs special handling, it seems that LLVM has trouble canonicalizing the loops in external iteration. With the override, it becomes obvious that the start==end case exits the loop (as opposed to the one *after* that exiting the loop in external iteration). Demo adapted from rust-lang#45222 ```rust #[no_mangle] pub fn foo3r(n: u64) -> u64 { let mut count = 0; (0..n).for_each(|_| { (0 ..= n).rev().for_each(|j| { count += j; }) }); count } ``` <details> <summary>Current nightly ASM, 100 lines (https://play.rust-lang.org/?gist=f5674c702c6e2045c3aab5d03763e5f6&version=nightly&mode=release)</summary> ```asm foo3r: pushq %rbx .Lcfi0: .Lcfi1: testq %rdi, %rdi je .LBB0_1 testb $1, %dil jne .LBB0_4 xorl %eax, %eax xorl %r8d, %r8d cmpq $1, %rdi jne .LBB0_11 jmp .LBB0_23 .LBB0_1: xorl %eax, %eax popq %rbx retq .LBB0_4: xorl %r8d, %r8d movq $-1, %r9 xorl %eax, %eax movq %rdi, %r11 xorl %r10d, %r10d jmp .LBB0_5 .LBB0_8: addq %r11, %rax movq %rsi, %r11 movq %rdx, %r10 .LBB0_5: cmpq %r11, %r10 movl $1, %ecx cmovbq %r9, %rcx cmoveq %r8, %rcx testq %rcx, %rcx movl $0, %esi movl $1, %edx je .LBB0_8 cmpq $-1, %rcx jne .LBB0_9 leaq -1(%r11), %rsi movq %r10, %rdx jmp .LBB0_8 .LBB0_9: movl $1, %r8d cmpq $1, %rdi je .LBB0_23 .LBB0_11: xorl %r9d, %r9d movq $-1, %r10 .LBB0_12: movq %rdi, %rsi xorl %r11d, %r11d jmp .LBB0_13 .LBB0_16: addq %rsi, %rax movq %rcx, %rsi movq %rbx, %r11 .LBB0_13: cmpq %rsi, %r11 movl $1, %edx cmovbq %r10, %rdx cmoveq %r9, %rdx testq %rdx, %rdx movl $0, %ecx movl $1, %ebx je .LBB0_16 cmpq $-1, %rdx jne .LBB0_17 leaq -1(%rsi), %rcx movq %r11, %rbx jmp .LBB0_16 .LBB0_17: movq %rdi, %rcx xorl %r11d, %r11d jmp .LBB0_18 .LBB0_21: addq %rcx, %rax movq %rsi, %rcx movq %rbx, %r11 .LBB0_18: cmpq %rcx, %r11 movl $1, %edx cmovbq %r10, %rdx cmoveq %r9, %rdx testq %rdx, %rdx movl $0, %esi movl $1, %ebx je .LBB0_21 cmpq $-1, %rdx jne .LBB0_22 leaq -1(%rcx), %rsi movq %r11, %rbx jmp .LBB0_21 .LBB0_22: addq $2, %r8 cmpq %rdi, %r8 jne .LBB0_12 .LBB0_23: popq %rbx retq .Lfunc_end0: ``` </details><br> With this PR: ```asm foo3r: test rcx, rcx je .LBB3_1 lea r8, [rcx - 1] lea rdx, [rcx - 2] mov rax, r8 mul rdx shld rdx, rax, 63 imul r8, r8 add r8, rcx sub r8, rdx imul r8, rcx mov rax, r8 ret .LBB3_1: xor r8d, r8d mov rax, r8 ret ```
…alexcrichton Use time crate in bootstrap dist instead of date `bootstrap dist` command is trying to run *NIX specific `date` command to get current month and year. This command keep failing when it's called on a Windows command prompt. This patch is making it use time crate. Closes: rust-lang#47908
… r=nikomatsakis Document that associated constants prevent a trait from being made into an object Fixes rust-lang#47952 Add a short mention of associated constants to E0038
…s, r=kennytm config.toml.example: fix typos. Most of them were found by codespell: https://github.com/lucasdemarchi/codespell
proc_macro: don't panic parsing ..= (fix rust-lang#47950)
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r? @cramertj (rust_highfive has picked a reviewer for you, use r? to override) |
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@bors r+ p=7 |
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📌 Commit 7f0e87a has been approved by |
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☀️ Test successful - status-appveyor, status-travis |
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