refactor(isolated_declarations, linter, minifier, prettier, semantic, transformer): remove unnecessary ref / ref mut syntax
#8643
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This was referenced Jan 21, 2025
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… transformer): remove unnecessary `ref` / `ref mut` syntax (#8643) While working on #8641, I found a lot of places where we unnecessarily use `ref` / `ref mut` in match arms. In many cases, we're creating double-references (turning a `&T` into a `&&T`). The compiler should be smart enough to remove them for us, but there doesn't seem much point in explicitly creating double-references when we don't actually want them, and relying on compiler to optimize them out again.
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## [0.48.0] - 2025-01-24 - 54d0fac span: [**BREAKING**] Remove `PartialEq` impl for `&Atom` (#8642) (overlookmotel) ### Features - 2a2ad53 allocator: Add `Allocator::capacity` and `used_bytes` methods (#8621) (overlookmotel) - 6801c81 allocator: Add `Allocator::new` and `with_capacity` methods (#8620) (overlookmotel) - 99607d3 codegen: Print comments in `TSTypeLiteral` (#8679) (Boshen) - 4ae568e linter: Add DiagnosticResult to the Reporters for receiving a sub part result (#8666) (Alexander S.) - 343690e minifier: Replace `Number.*_SAFE_INTEGER`/`Number.EPSILON` (#8682) (sapphi-red) - 0c5bb30 minifier: Replace `Number.POSITIVE_INFINITY`/`Number.NEGATIVE_INFINITY`/`Number.NaN` (#8681) (sapphi-red) - 835b258 minifier: Compress `typeof foo === 'object' && foo !== null` to `typeof foo == 'object' && !!foo` (#8638) (sapphi-red) - 2bcbed2 minifier: Compress `(a = b) === null || a === undefined` to `(a = b) == null` (#8637) (sapphi-red) ### Bug Fixes - 40316af linter: Fix github `endColumn` output (#8647) (Alexander S.) - 883d25b minifier: Keep esm in dce (#8677) (Boshen) - 878ce10 minifier: `void 0` equals to `undefined` (#8673) (Boshen) - ba201a6 minifier: Remove "non esbuild optimizations" which is incorrect (#8668) (Boshen) - 8c8b5fa minifier: Avoid minifing `String(a)` into `"" + a` for symbols (#8612) (翠 / green) - 4ff6e85 minifier: Remove expression statement `void 0` (#8602) (Boshen) - 93d643e minifier: Keep side effects when folding const conditional exprs (#8591) (camc314) - 178c232 parser: Parse `intrinsic` TS keyword (#8627) (Kevin Deng 三咲智子) - 48717ab parser: Parse `true` as `TSLiteralType` (#8626) (Kevin Deng 三咲智子) - d1c5dc4 semantic: Fix const assertions in `UnresolvedReferencesStack` (#8653) (overlookmotel) ### Performance - 787aaad allocator: Make `String` non-drop (#8617) (overlookmotel) - d966e0a codegen: Do not check for comments if turned off (#8598) (Boshen) - 3fa87ff lexer: Peak 2 bytes after `!` (#8662) (Boshen) - 9953ac7 minifier: Add `LatePeepholeOptimizations` (#8651) (Boshen) - 00dc63f minifier: Only substitute typed array constructor once (#8649) (Boshen) - 3e19e4e minifier: Remove the useless empty statement removal code in statement fusion (#8646) (Boshen) - 5b3c412 minifier: Only run optimizations on local changes (#8644) (Boshen) ### Documentation - c1d243b allocator: Improve docs for `Allocator` (#8623) (overlookmotel) - 01a5e5d allocator: Improve docs for `HashMap` (#8616) (overlookmotel) - 87568a1 allocator: Reformat docs (#8615) (overlookmotel) - 3be0392 lexer: Fix doc comment (#8664) (overlookmotel) - 5029547 semantic: Fix and reformat doc comments (#8652) (overlookmotel) ### Refactor - ae8db53 allocator: Move `Allocator` into own module (#8656) (overlookmotel) - 0f85bc6 allocator: Reduce repeat code to prevent `Drop` types in arena (#8655) (overlookmotel) - de76eb1 allocator: Reorder `Box` methods (#8654) (overlookmotel) - 997859c ast: Align `#[estree(via)]` behavior (#8599) (sapphi-red) - db863a3 codegen: Use `Stack` for `binary_expr_stack` (#8663) (Boshen) - 8cce69a codegen: Remove `match_member_expression` (#8597) (Boshen) - a3dc4c3 crates: Clean up snapshot files (#8680) (Boshen) - e66da9f isolated_declarations, linter, minifier, prettier, semantic, transformer: Remove unnecessary `ref` / `ref mut` syntax (#8643) (overlookmotel) - 23b49a6 linter: Use `cow_to_ascii_lowercase` instead `cow_to_lowercase` (#8678) (Boshen) - ce2b9da minifier: Remove `wrap_to_avoid_ambiguous_else` (#8676) (Boshen) - 75a579b minifier: Clean up `has_no_side_effect_for_evaluation_same_target` (#8675) (Boshen) - 1bb2539 minifier: Move more code into `minimize_conditions` local loop (#8671) (Boshen) - 13e4a45 minifier: Move conditional assignment to `minimize_conditions` (#8669) (Boshen) - ae895d8 minifier: Use `NonEmptyStack` for function stack (#8661) (Boshen) - 3802d28 minifier: Clean up `try_minimize_conditional` (#8660) (Boshen) - dcc1f2b minifier: Rename `ast_passes` to `peephole` (#8635) (Boshen) - 52458de minifier: Remove unused code and traits (#8632) (Boshen) - 6f95cd5 minifier: Remove all the unnecessary fake ast passes (#8618) (Boshen) - 712cae0 minifier: Run the compressor on all test cases (#8604) (Boshen) - 864b8ef parser: Shorten code (#8640) (overlookmotel) - b8d9a51 span: Deal only in owned `Atom`s (#8641) (overlookmotel) - 20f52b1 span: Remove unnecessary lifetimes on `Atom` impls (#8639) (overlookmotel) - ac4f98e span: Derive `Copy` on `Atom` (#8596) (branchseer) - a730f99 transformer: Move `create_prototype_member` to utils module (#8657) (Dunqing) - 61d96fd transformer/class-properties: Correct comments (#8636) (overlookmotel) ### Testing - 39dbd2d codegen: Fix snapshot file (#8685) (Boshen) - d9f5e7f minifier: Enable passed esbuild tests (Boshen) Co-authored-by: Boshen <[email protected]>
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## [0.15.8] - 2025-01-24 ### Features - 79ba9b5 linter: Added support to run in Node.JS legacy versions (#8648) (Luiz Felipe Weber) - dcaebe6 linter: Add "strict" option to `promise/prefer-await-to-then` rule (#8674) (Neil Fisher) - 4ae568e linter: Add DiagnosticResult to the Reporters for receiving a sub part result (#8666) (Alexander S.) - 8a0eb2a oxlint: Add stylish formatter (#8607) (Andrew Powell) ### Bug Fixes - 40316af linter: Fix github `endColumn` output (#8647) (Alexander S.) - dc912fa linter: Added missing $schema property to default config (#8625) (Tapan Prakash) ### Refactor - a3dc4c3 crates: Clean up snapshot files (#8680) (Boshen) - e66da9f isolated_declarations, linter, minifier, prettier, semantic, transformer: Remove unnecessary `ref` / `ref mut` syntax (#8643) (overlookmotel) - 23b49a6 linter: Use `cow_to_ascii_lowercase` instead `cow_to_lowercase` (#8678) (Boshen) - b8d9a51 span: Deal only in owned `Atom`s (#8641) (overlookmotel) - ac4f98e span: Derive `Copy` on `Atom` (#8596) (branchseer) - 259a47b vscode: Move commands and `findBinary` to separate files (#8605) (Alexander S.) Co-authored-by: Boshen <[email protected]>
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While working on #8641, I found a lot of places where we unnecessarily use
ref/ref mutin match arms.In many cases, we're creating double-references (turning a
&Tinto a&&T). The compiler should be smart enough to remove them for us, but there doesn't seem much point in explicitly creating double-references when we don't actually want them, and relying on compiler to optimize them out again.