1f04597c3c
Programmers used to working in some other languages (such as Python or Go) might expect to be able to destructure values with comma-separated identifiers but no parentheses on the left side of an assignment. Previously, the first name in such code would get parsed as a single-indentifier pattern—recognizing, for example, the `let a` in `let a, b = (1, 2);`—whereupon we would have a fatal syntax error on seeing an unexpected comma rather than the expected semicolon (all the way nearer to the end of `parse_full_stmt`). Instead, let's look for that comma when parsing the pattern, and if we see it, momentarily make-believe that we're parsing the remaining elements in a tuple pattern, so that we can suggest wrapping it all in parentheses. We need to do this in a separate wrapper method called on the top-level pattern (or `|`-patterns) in a `let` statement, `for` loop, `if`- or `while let` expression, or match arm rather than within `parse_pat` itself, because `parse_pat` gets called recursively to parse the sub-patterns within a tuple pattern. Resolves #48492. |
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| .. | ||
| bootstrap | ||
| build_helper | ||
| ci | ||
| dlmalloc@9b2dcac06c | ||
| doc | ||
| etc | ||
| grammar | ||
| jemalloc@1f5a28755e | ||
| liballoc | ||
| liballoc_jemalloc | ||
| liballoc_system | ||
| libarena | ||
| libbacktrace | ||
| libcompiler_builtins@266ea0740a | ||
| libcore | ||
| libfmt_macros | ||
| libgetopts | ||
| libgraphviz | ||
| liblibc@56444a4545 | ||
| libpanic_abort | ||
| libpanic_unwind | ||
| libproc_macro | ||
| libprofiler_builtins | ||
| librustc | ||
| librustc_allocator | ||
| librustc_apfloat | ||
| librustc_asan | ||
| librustc_back | ||
| librustc_borrowck | ||
| librustc_const_eval | ||
| librustc_const_math | ||
| librustc_cratesio_shim | ||
| librustc_data_structures | ||
| librustc_driver | ||
| librustc_errors | ||
| librustc_incremental | ||
| librustc_lint | ||
| librustc_llvm | ||
| librustc_lsan | ||
| librustc_metadata | ||
| librustc_mir | ||
| librustc_msan | ||
| librustc_passes | ||
| librustc_platform_intrinsics | ||
| librustc_plugin | ||
| librustc_privacy | ||
| librustc_resolve | ||
| librustc_save_analysis | ||
| librustc_trans | ||
| librustc_trans_utils | ||
| librustc_tsan | ||
| librustc_typeck | ||
| librustdoc | ||
| libserialize | ||
| libstd | ||
| libstd_unicode | ||
| libsyntax | ||
| libsyntax_ext | ||
| libsyntax_pos | ||
| libterm | ||
| libtest | ||
| libunwind | ||
| llvm@0903c72cbb | ||
| llvm-emscripten@2717444753 | ||
| rtstartup | ||
| rustc | ||
| rustllvm | ||
| stdsimd@678cbd325c | ||
| test | ||
| tools | ||
| Cargo.lock | ||
| Cargo.toml | ||
| README.md | ||
| stage0.txt | ||
This directory contains the source code of the rust project, including:
rustcand its testslibstd- 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:
- https://github.com/rust-lang/rust/tree/master/src/librustc/ty/maps
- https://github.com/rust-lang/rust/tree/master/src/librustc/dep_graph
- https://github.com/rust-lang/rust/blob/master/src/librustc/infer/region_constraints
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/higher_ranked
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/lexical_region_resolve