[Chudesnov]

Summary

Adds a jsxRuntime: "react" | "solid" macro option (default "react").

With "solid", every JSX element inside <Trans> is emitted as a component function instead of a bare element:

// input
<Trans>Hello <a href="/docs">docs</a>.</Trans>

// jsxRuntime: "solid"
<Trans_ {.../*i18n*/ {
    id: "lqG909",
    components: {
        0: (_props)=><a href="/docs" {..._props}/>
    },
    message: "Hello <0>docs</0>."
}}/>

This ports the Babel macro's wrapJsxElementAsComponent behavior, and the id lqG909 matches the Babel snapshot should generate Solid components 1.

Details:

• Original attributes are kept in source order, including existing spreads; {..._props} is appended last so runtime props such as children win. The tag name is cloned as-is (member expressions like <Foo.Bar> work), and the element is always self-closing.
• _props is a fresh private_ident!, so hygiene renames it (_props1) if the user already has a _props binding in scope.
• Only the <Trans> path is affected. t, msg, defineMessage and useLingui produce identical output in both modes.
• Dedup of named placeholders (_t="link") and the "Multiple distinct JSX elements with the same placeholder name" check still compare the original elements, not the wrapped ones.

Docs: new jsxRuntime entry in both the @lingui/swc-plugin and @lingui/native-tools READMEs, pointing to defineConfig from @lingui/solid/config and the Solid tutorial.

Closes #276

Tests

• New crates/lingui_macro/tests/jsx_solid.rs (snapshots): basic attrs, self-closing, nested elements with values, member-expression tag, existing spread attrs, reused named placeholder, Plural inside Trans, element inside an ICU case, _props name collision, conflicting named placeholders (to_panic!), and t/useLingui unaffected.
• Unit tests for parsing jsxRuntime in options.rs ("solid", "react", missing, invalid).
• native-tools spec for solid vs. default output; e2e test that macro.jsxRuntime from a Lingui config reaches the plugin options.
• Ran locally on the final commit: cargo test, cargo fmt --check, cargo clippy --all-targets --all-features -- -D warnings, and native-tools yarn build && yarn test. No existing snapshots changed.

AI disclosure

Heads up: this was written with Claude Code. I spot-checked it, but I haven't written Rust before, so I'd appreciate a close look at component_value in builder.rs and the option plumbing in options.rs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.60%. Comparing base (c538858) to head (07b146b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #286      +/-   ##
==========================================
+ Coverage   94.42%   94.60%   +0.17%     
==========================================
  Files          11       11              
  Lines        2530     2576      +46     
==========================================
+ Hits         2389     2437      +48     
+ Misses        141      139       -2     

Flag	Coverage Δ
unittests	94.60% <100.00%> (+0.17%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
crates/lingui_macro/src/builder.rs	99.16% <100.00%> (+0.07%)	⬆️
crates/lingui_macro/src/lib.rs	91.70% <ø> (+0.25%)	⬆️
crates/lingui_macro/src/options.rs	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[Copilot]

🟢 Approval recommended

Static review identified no blocking issues, and supplied regression coverage addresses option forwarding, component generation, and preserved default behavior.

No open issues 🎉

What changed in this PR

Adds Solid-compatible JSX output to Lingui’s macro tooling, addressing #276 while preserving React as the default.

Changes:

• Adds and forwards the jsxRuntime option.
• Wraps nested JSX elements as component functions in Solid mode.
• Adds documentation and regression coverage for configuration, output, and placeholder handling.

File	Description
packages/​native-tools/​README.md	Documents Solid configuration.
packages/​native-tools/​__test__/​transform.spec.ts	Tests React and Solid output.
packages/​lingui-macro/​src-js/​map-options.ts	Types and forwards jsxRuntime.
packages/​lingui-macro/​README.md	Documents runtime behavior.
packages/​lingui-macro/​e2e/​options.test.ts	Tests configuration forwarding.
packages/​lingui-macro/​e2e/​fixtures/​lingui-options/​solid.config.js	Adds Solid configuration fixture.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_self_closing_element.snap	Covers self-closing elements.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_props_name_collision.snap	Covers generated parameter hygiene.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_plural_inside_trans.snap	Covers nested plural macros.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_nested_elements_and_values.snap	Covers nesting and interpolation.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_named_placeholder_reused.snap	Covers placeholder reuse.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_member_expression_tag.snap	Covers member-expression tags.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_existing_spread_attrs.snap	Covers attribute spread ordering.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_element_inside_icu_case.snap	Covers elements within plural cases.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_does_not_affect_t_and_use_lingui.snap	Confirms unchanged non-JSX macro output.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_distinct_elements_same_placeholder.snap	Covers conflicting placeholder errors.
crates/​lingui_macro/​tests/​snapshots/​jsx_solid__solid_basic_component_with_attrs.snap	Covers basic Solid component output.
crates/​lingui_macro/​tests/​jsx_solid.rs	Adds Solid transformation regression tests.
crates/​lingui_macro/​src/​options.rs	Defines, defaults, and tests runtime options.
crates/​lingui_macro/​src/​lib.rs	Exports JsxRuntime.
crates/​lingui_macro/​src/​builder.rs	Generates Solid component wrappers.

_{Review effort: Balanced}