More precise spans for temps and their drops #55781
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…ent's terminating semicolon.
…ock's tail (if present).
(I opted to rely on compare-mode=nll rather than opt into `#![feature(nll)]`, mostly to make it easy to observe the interesting differences between the AST-borrwock diagnostic and the NLL one.)
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This example, by the way, seems to be a particular variant of the kind of code that inspired me to make PR #54782 (cc #54556), which tried to lead the developer to consider adding a semicolon to the end of the inner tail expression. I am not 100% sure why that suggestion is not being issued here; my best guess is that the |
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(as you can see in my follow up commits, I couldn't resist looking into why the suggestion from PR #54782 was not being applied to this case.) |
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r? @davidtwco |
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📌 Commit dd63982 has been approved by |
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…pans-for-temps-and-their-drops, r=davidtwco More precise spans for temps and their drops This PR has two main enhancements: 1. when possible during code generation for a statement (like `expr();`), pass along the span of a statement, and then attribute the drops of temporaries from that statement to the statement's end-point (which will be the semicolon if it is a statement that is terminating by a semicolon). 2. when evaluating a block expression into a MIR temp, use the span of the block's tail expression (rather than the span of whole block including its statements and curly-braces) for the span of the temp. Each of these individually increases the precision of our diagnostic output; together they combine to make a much clearer picture about the control flow through the spans. Fix rust-lang#54382
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…pans-for-temps-and-their-drops, r=davidtwco More precise spans for temps and their drops This PR has two main enhancements: 1. when possible during code generation for a statement (like `expr();`), pass along the span of a statement, and then attribute the drops of temporaries from that statement to the statement's end-point (which will be the semicolon if it is a statement that is terminating by a semicolon). 2. when evaluating a block expression into a MIR temp, use the span of the block's tail expression (rather than the span of whole block including its statements and curly-braces) for the span of the temp. Each of these individually increases the precision of our diagnostic output; together they combine to make a much clearer picture about the control flow through the spans. Fix rust-lang#54382
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Rollup of 17 pull requests Successful merges: - #55182 (Redox: Update to new changes) - #55211 (Add BufWriter::buffer method) - #55507 (Add link to std::mem::size_of to size_of intrinsic documentation) - #55530 (Speed up String::from_utf16) - #55556 (Use `Mmap` to open the rmeta file.) - #55622 (NetBSD: link libstd with librt in addition to libpthread) - #55750 (Make `NodeId` and `HirLocalId` `newtype_index`) - #55778 (Wrap some query results in `Lrc`.) - #55781 (More precise spans for temps and their drops) - #55785 (Add mem::forget_unsized() for forgetting unsized values) - #55852 (Rewrite `...` as `..=` as a `MachineApplicable` 2018 idiom lint) - #55865 (Unix RwLock: avoid racy access to write_locked) - #55901 (fix various typos in doc comments) - #55926 (Change sidebar selector to fix compatibility with docs.rs) - #55930 (A handful of hir tweaks) - #55932 (core/char: Speed up `to_digit()` for `radix <= 10`) - #55956 (add tests for some fixed ICEs) Failed merges: r? @ghost
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This PR has two main enhancements:
expr();), pass along the span of a statement, and then attribute the drops of temporaries from that statement to the statement's end-point (which will be the semicolon if it is a statement that is terminating by a semicolon).Each of these individually increases the precision of our diagnostic output; together they combine to make a much clearer picture about the control flow through the spans.
Fix #54382