Similar to #9396. JS identifiers cannot contain any of the characters which require escaping in JSON (whitespace, control characters, `"`, `\`).

Mark struct fields containing a JS identifier name with `#[estree(json_safe)]` to cause codegen to wrap them in `JsonSafeString` before serializing. This removes the work of escaping identifiers during serialization.

Note: Identifiers *can* contain `\` in source text as start of an escape sequence. But such escape sequences are unescaped in parser, so the `Atom` in AST representing identifier name cannot contain `\`.

## [0.54.0] - 2025-03-04

- 098f652 codegen: [**BREAKING**] Add `CommentAnnotation` to avoid
parsing comments again (#9506) (Boshen)

- a8d1d48 parser,codegen: [**BREAKING**] Parse and
print`#__NO_SIDE_EFFECTS__` (#9496) (Boshen)

- 355a4db napi/parser: [**BREAKING**] Remove `parse_without_return` API
(#9455) (Boshen)

- a5cde10 visit_ast: [**BREAKING**] Add `oxc_visit_ast` crate (#9428)
(Boshen)

- abb15e0 ast: [**BREAKING**] Add `pure` field to `Function`,
`CallExpression`, and `NewExpression` (#9207) (overlookmotel)

### Features

- a9f0d2b ast_tools: Generate field offset assertions for more types
(#9449) (overlookmotel)
- 64f4a82 ecmascript: Handle pure call expression in chain expressions
(#9480) (sapphi-red)
- 32139d2 ecmascript: Support `/* @__PURE__ */` in may_have_side_effects
(#9409) (sapphi-red)
- f5453f6 minifier: Flatten spread args in new expressions (#9512)
(sapphi-red)
- f8073f3 minifier: Support if with side effects in dead code
elimination (#9502) (sapphi-red)
- 10eb8f7 minifier: Use `remove_unused_expression` in
`try_fold_sequence_expression` in `remove_dead_code` (#9467)
(sapphi-red)
- 70916db minifier: Remove unused expression in for init and update
(#9466) (sapphi-red)
- 26fde56 minifier: Inline simple IIFEs in `remove_unused_expression`
(#9465) (sapphi-red)
- ec2193e minifier: Support extracting arguments in pure calls in
`remove_unused_expression` (#9463) (sapphi-red)
- 007051c minifier: Compress `a != null && a.b()` to `a?.b()` in
`remove_unused_expression` (#9459) (sapphi-red)
- 50fce20 minifier: Support binary expression in
`remove_unused_expression` (#9456) (sapphi-red)
- ed9ede3 minifier: Support conditional expression in
`remove_unused_expression` (#9432) (sapphi-red)
- 3520538 minifier: Support object expression in
`remove_unused_expression` (#9430) (sapphi-red)
- fb8a93d minifier: Improve array expression handling in
`remove_unused_expression` (#9427) (sapphi-red)
- ff477cd minifier: Support template literals in
`remove_unused_expression` (#9426) (sapphi-red)
- 0d26113 minifier: Compress `/* @__PURE__ */ a() ? b : b` to `b`
(#9410) (sapphi-red)
- 68c77c8 napi/parser: Return semantic errors (#9460) (Boshen)
- 7d7f16c parser: Apply pure to rhs of binary expression (#9492)
(Boshen)
- 2a08b14 parser: Support V8 intrinsics (#9379) (injuly)
- 9b7017c parser,codegen: Pure annotations (#9351) (Boshen)
- aa06932 transformer: Support `ModuleRunnerTransform` (#9371) (Dunqing)

### Bug Fixes

- 75f06ad codegen: Do not print comments when only `annotation_comments`
is enabled (#9518) (Dunqing)
- f5bbd5d ecmascript: Fix toString for negative numbers (#9508)
(sapphi-red)
- d2cd975 ecmascript: Fix may_have_side_effects for `${a() === b}`
(#9478) (sapphi-red)
- 584d847 ecmascript: Objects passed to template literals may have side
effects (#9425) (sapphi-red)
- b371fdc estree/ast: Camel-case `typeAnnotation` field (#9420)
(overlookmotel)
- 1fff993 minifier: Correctly remove dead code in `try` with `finally`
(#9503) (sapphi-red)
- 0b96ebe minifier: Don't inline IIFE with parameters (#9477)
(sapphi-red)
- 071c84c minifier: Skip `try_fold_stmt_in_boolean_context` on
`ExpressionStatement` (#9458) (sapphi-red)
- 306284d minifier: Call mark_current_function_as_changed in
remove_unused_expression (#9457) (sapphi-red)
- 9c6ae9f parser: `@__NO_SIDE_EFFECTS` only affects const variable decl
(#9517) (Boshen)
- b7d5513 parser: Parse `@__NO_SIDE_EFFECTS__` between `export default`
and `async function` (#9514) (Boshen)
- 01de74c parser: Correctly fail parsing when parsing `foo.bar?.`
(#9499) (camc314)
- 58defe3 parser: Mark expression as pure in chain expression (#9479)
(sapphi-red)
- 2a03689 parser: Mark expressions on the left side of logical and
conditional expressions as pure (#9414) (sapphi-red)
- 7fde233 transformer/legacy-decorator: Incorrect check for potentially
non-existent ident (#9491) (Dunqing)
- b4f050c transformer/legacy-decorator: Metadata incorrectly wrapped by
decorateParam (#9490) (Dunqing)
- 5f67fa9 transformer/optional-chaning: Keep `this` when transforming
`this.f?.()` (#9505) (camc314)

### Performance

- 10e4431 ast/estree: Skip escaping identifiers (#9398) (overlookmotel)
- b0a0a82 ast/estree: Reduce overhead serializing static strings (#9396)
(overlookmotel)
- 27a8e50 isolated_declarations: Reserve sufficient capacity in
statements `Vec` (#9394) (overlookmotel)

### Refactor

- 8916335 ast/estree: Convert enums with converters on variants (#9438)
(overlookmotel)
- dcff40c ast_tools: Generate layout assertions in multiple crates
(#9448) (overlookmotel)
- 19c4835 codegen: Simplify printing comments between arguments in
call-like expressions (#9501) (Dunqing)
- c880481 isolated_declarations: Rename var (#9390) (overlookmotel)
- 37e41f0 isolated_declarations: Use aliases `ArenaBox` / `ArenaVec`
(#9389) (overlookmotel)
- bbb450c minifier: Move `a != null && b` -> `a ?? b` compression to
`remove_unused_expression` (#9468) (sapphi-red)
- b93774c minifier: Move `try_fold_iife` to `remove_unused_expression`
(#9464) (sapphi-red)
- 96a9719 minifier: Use `may_have_side_effects` in
`remove_unused_expression` (#9413) (sapphi-red)

### Testing

- c187b11 ecmascript: Add comments and tests for cases where
`ToPropertyKey` throws an error (#9429) (sapphi-red)
- d129055 napi: Add tests for worker threads (#9408) (Boshen)
- 48d51e3 napi: Add tests for `hashbang` field (#9386) (overlookmotel)

Co-authored-by: Boshen <[email protected]>