[intellild]

Summary

• Add custom source map support through PrinterOptions<'a, S> and keep a single StyleSheet::to_css(options) entry point.
• Implement Default for the no-map specialization so ordinary calls can keep using PrinterOptions::default().
• Extract the map when constructing the printer. Serialization helpers continue to read the same options type, and the concrete map type handles inline map parsing and writing through static dispatch.

Example

An embedder can use its own map implementation while ordinary callers keep the same entry point.

let css = stylesheet.to_css(PrinterOptions::default())?;
let css_with_mappings = stylesheet.to_css(
  PrinterOptions::default().with_source_map(&mut custom_map),
)?;

Validation

• Workspace check with all features
• Root crate tests with all features (189 passed)
• Custom bundler source map tests without default features (3 passed)
• Custom at-rule example and test compilation with only visitor enabled
• Transform benchmark compilation

Stack

1. Fix bundled source-map indices
2. Use std::fmt::Write for printer output
3. Serialize CSS through PrinterTrait
4. Introduce the custom_sourcemap feature flag
5. This PR

---

by OpenAI Codex

[codspeed]

Merging this PR will not alter performance

✅ 12 untouched benchmarks
⏩ 4 skipped benchmarks¹

---

_{Comparing codex/rstack-generic-printer-options (a002b2f) with codex/rstack-rename-sourcemap-feature (43b17bc)}

Footnotes

1. 4 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-05T02:23:13.082148Z	a002b2f	Draft marked ready

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