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bors cae6efc37d Auto merge of #54183 - qnighy:by-value-object-safety, r=oli-obk 
Implement by-value object safety

This PR implements **by-value object safety**, which is part of unsized rvalues #48055. That means, with `#![feature(unsized_locals)]`, you can call a method `fn foo(self, ...)` on trait objects. One aim of this is to enable `Box<FnOnce>`  in the near future.

The difficulty here is this: when constructing a vtable for a trait `Foo`, we can't just put the function `<T as Foo>::foo` into the table. If `T` is no larger than `usize`, `self` is usually passed directly. However, as the caller of the vtable doesn't know the concrete `Self` type, we want a variant of `<T as Foo>::foo` where `self` is always passed by reference.

Therefore, when the compiler encounters such a method to be generated as a vtable entry, it produces a newly introduced instance called `InstanceDef::VtableShim(def_id)` (that wraps the original instance). the shim just derefs the receiver and calls the original method. We give different symbol names for the shims by appending `::{{vtable-shim}}` to the symbol path (and also adding vtable-shimness as an ingredient to the symbol hash).

r? @eddyb
2018-10-27 19:29:35 +00:00
..
bootstrap Rollup merge of #55391 - matthiaskrgr:bootstrap_cleanup, r=oli-obk 2018-10-26 23:10:38 +08:00
build_helper Prefer unwrap_or_else to unwrap_or in case of function calls/allocations 2018-10-19 09:45:45 +02:00
ci CI: Set codegen-units-std=1 for dist builds. 2018-10-26 15:07:03 +02:00
dlmalloc@c99638dc2e
doc Reflect by-value object safety in the unstable book. 2018-10-24 21:59:07 +09:00
etc fix typos in various places 2018-10-23 15:56:25 +02:00
grammar
jemalloc@1f5a28755e
liballoc fix typos in various places 2018-10-23 15:56:25 +02:00
liballoc_jemalloc Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
liballoc_system std: Synchronize global allocator on wasm32 2018-10-09 23:35:45 -07:00
libarena Update TypedArena tests 2018-10-19 14:34:44 +02:00
libbacktrace@f4d02bbdbf
libcompiler_builtins@0703bfa725 Revert "renamed emit_nil to emit_unit" 2018-09-11 22:20:22 +09:00
libcore Rollup merge of #55269 - matthiaskrgr:typos_oct, r=zackmdavis 2018-10-25 14:31:13 +02:00
libfmt_macros remove padding from multiline format string label 2018-10-03 14:29:39 -04:00
libgraphviz Remove graphviz::IntoCow 2018-10-05 14:16:10 +02:00
liblibc@1844a772b6 Revert "renamed emit_nil to emit_unit" 2018-09-11 22:20:22 +09:00
libpanic_abort wasm: Explicitly export all symbols with LLD 2018-10-02 13:49:51 -07:00
libpanic_unwind Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
libproc_macro All proc_macro_span APIs tracked at #54725 now 2018-10-01 12:15:35 -07:00
libprofiler_builtins Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc Auto merge of #54183 - qnighy:by-value-object-safety, r=oli-obk 2018-10-27 19:29:35 +00:00
librustc_allocator Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_apfloat Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_asan Rollup merge of #54681 - alexcrichton:san-names, r=kennytm 2018-10-01 16:13:04 +08:00
librustc_borrowck Auto merge of #55150 - pnkfelix:issues-47215-54797-fix-ice-from-moving-out-of-thread-local-under-ast-borrowck, r=nikomatsakis 2018-10-27 09:56:37 +00:00
librustc_codegen_llvm Auto merge of #54183 - qnighy:by-value-object-safety, r=oli-obk 2018-10-27 19:29:35 +00:00
librustc_codegen_utils Auto merge of #54183 - qnighy:by-value-object-safety, r=oli-obk 2018-10-27 19:29:35 +00:00
librustc_cratesio_shim Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_data_structures Auto merge of #54778 - scottmcm:stabilize-ihle, r=pnkfelix 2018-10-23 04:05:50 +00:00
librustc_driver Add extern crate items to extern prelude 2018-10-24 00:14:50 +03:00
librustc_errors Auto merge of #55014 - ljedrz:lazyboye_unwraps, r=matthewjasper 2018-10-20 11:22:48 +00:00
librustc_fs_util
librustc_incremental Prefer Default::default over FxHash*::default in struct constructors 2018-10-19 14:34:44 +02:00
librustc_lint Auto merge of #54929 - csmoe:cfg_lint, r=petrochenkov 2018-10-26 21:46:13 +00:00
librustc_llvm Revert "rustc: Fix (again) simd vectors by-val in ABI" 2018-10-23 00:59:14 -07:00
librustc_lsan Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_metadata Auto merge of #54626 - alexcrichton:dwarf-generics, r=michaelwoerister 2018-10-26 14:30:26 +00:00
librustc_metadata_utils
librustc_mir Auto merge of #54183 - qnighy:by-value-object-safety, r=oli-obk 2018-10-27 19:29:35 +00:00
librustc_msan Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_passes Auto merge of #55150 - pnkfelix:issues-47215-54797-fix-ice-from-moving-out-of-thread-local-under-ast-borrowck, r=nikomatsakis 2018-10-27 09:56:37 +00:00
librustc_platform_intrinsics Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_plugin Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
librustc_privacy Deprecate the FxHashMap() and FxHashSet() constructor function hack 2018-10-19 14:34:44 +02:00
librustc_resolve Remove redundant clone 2018-10-26 12:07:39 +09:00
librustc_save_analysis Remove redundant clone 2018-10-26 12:07:39 +09:00
librustc_target Remove redundant clone 2018-10-26 12:07:39 +09:00
librustc_traits add user_ty.projs support to AscribeUserType. 2018-10-26 23:47:53 +02:00
librustc_tsan Rollup merge of #54681 - alexcrichton:san-names, r=kennytm 2018-10-01 16:13:04 +08:00
librustc_typeck Auto merge of #55150 - pnkfelix:issues-47215-54797-fix-ice-from-moving-out-of-thread-local-under-ast-borrowck, r=nikomatsakis 2018-10-27 09:56:37 +00:00
librustdoc Rollup merge of #55358 - sinkuu:redundant_clone2, r=estebank 2018-10-26 23:06:49 +08:00
libserialize Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
libstd Rollup merge of #55328 - raphlinus:copysign_typo, r=joshtriplett 2018-10-25 14:31:21 +02:00
libsyntax Auto merge of #54929 - csmoe:cfg_lint, r=petrochenkov 2018-10-26 21:46:13 +00:00
libsyntax_ext Auto merge of #54929 - csmoe:cfg_lint, r=petrochenkov 2018-10-26 21:46:13 +00:00
libsyntax_pos Add macro call span when lacking any other span in diagnostic 2018-10-23 10:07:11 -07:00
libterm Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
libtest add option to libtest to run all tests 2018-10-14 00:58:17 +02:00
libunwind Bump to 1.31.0 and bootstrap from 1.30 beta 2018-09-27 20:52:53 -07:00
llvm@caddcd9b9d Update LLVM to fix "bool" arguments on PPC32 2018-09-16 04:33:58 +08:00
llvm-emscripten@2717444753
rtstartup
rustc
rustllvm Revert "rustc: Fix (again) simd vectors by-val in ABI" 2018-10-23 00:59:14 -07:00
stdsimd@431766a3fb Update stdsimd submodule 2018-10-23 09:51:02 -07:00
test Auto merge of #54183 - qnighy:by-value-object-safety, r=oli-obk 2018-10-27 19:29:35 +00:00
tools Rollup merge of #55269 - matthiaskrgr:typos_oct, r=zackmdavis 2018-10-25 14:31:13 +02:00
.gitignore
Cargo.lock submodules: update clippy from 5afdf8b7 to b1d03437 2018-10-21 17:56:00 +02:00
Cargo.toml Use rls-data 0.18.1 2018-09-28 01:54:01 +02:00
README.md
stage0.txt bump bootstrap compiler to rustc beta 2018-10-13 2018-10-14 00:52:47 +02:00

README.md

This directory contains the source code of the rust project, including:

  • rustc and its tests
  • libstd
  • Various submodules for tools, like rustdoc, rls, etc.

For more information on how various parts of the compiler work, see the rustc guide.

Their is also useful content in the following READMEs, which are gradually being moved over to the guide: