fix(eslint-plugin): [consistent-type-exports] fix declaration shadowing

[ntdiary]

PR Checklist

• Addresses an existing open issue: fixes Bug: [consistent-type-export] Declaration shadowing causes false positive #11388
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

this PR will also fix #10313.

The comment on getSymbolFlags mentions a similar case:

    /**
     * Gets combined flags of a `symbol` and all alias targets it resolves to. `resolveAlias`
     * is typically recursive over chains of aliases, but stops mid-chain if an alias is merged
     * with another exported symbol, e.g.
     * ```ts
     * // a.ts
     * export const a = 0;
     * // b.ts
     * export { a } from "./a";
     * export type a = number;
     * // c.ts
     * import { a } from "./b";
     * ```
     * Calling `resolveAlias` on the `a` in c.ts would stop at the merged symbol exported
     * from b.ts, even though there is still more alias to resolve. Consequently, if we were
     * trying to determine if the `a` in c.ts has a value meaning, looking at the flags on
     * the local symbol and on the symbol returned by `resolveAlias` is not enough.
     * @returns SymbolFlags.All if `symbol` is an alias that ultimately resolves to `unknown`;
     * combined flags of all alias targets otherwise.
     */
    function getSymbolFlags(symbol: Symbol, excludeTypeOnlyMeanings?: boolean, excludeLocalMeanings?: boolean): SymbolFlags {

resolveAlias is typically recursive over chains of aliases, but stops mid-chain if an alias is merged with another exported symbol. So we need a loop to check whether the target has a value meaning.
There might be a more robust public API for these cases in TS in the future (possibly symbolIsValue?), but considering compatibility and simplicity, I feel the while in this PR could be sufficient for our current needs.
Please feel free to let me know if you have any better ideas. 😄

💖

[typescript-eslint]

Thanks for the PR, @ntdiary!

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[nx-cloud]

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☁️ Nx Cloud last updated this comment at 2025-09-04 02:13:46 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.91%. Comparing base (f0e64eb) to head (0a88ead).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #11457   +/-   ##
=======================================
  Coverage   90.90%   90.91%           
=======================================
  Files         505      505           
  Lines       51155    51153    -2     
  Branches     8424     8426    +2     
=======================================
+ Hits        46503    46506    +3     
+ Misses       4639     4634    -5     
  Partials       13       13           

Flag	Coverage Δ
unittest	90.91% <100.00%> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
...eslint-plugin/src/rules/consistent-type-exports.ts	95.97% <100.00%> (+1.51%)	⬆️

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[JoshuaKGoldberg]

Nice! 👌 very well done on the line reduction.