next.js

04adb764 - Disallow multiple server directives at the same level (file or function) (#73018)

Disallow multiple server directives at the same level (file or function) (#73018) This PR has two main goals: - **Consolidate the detection of server directives in modules and function bodies.** Previously, these were two separate implementations with significant overlap, but also some [questionable discrepancies](https://github.com/vercel/next.js/pull/72811#discussion_r1843660381). - **Model the current directive (in a file or function) using an enum instead of two separate booleans.** This change prevents any confusion that both directives might be present simultaneously. Additionally, we're now emitting an error if multiple directives (`"use server"` and `"use cache"`) are defined in the same location (at the top of a file or function body). A mixed usage of `"use server"` and `"use cache"` _across different locations_ is still allowed, e.g. `"use cache"` at the top of a file, and `"use server"` in a function. > [!NOTE] > The diff may be tricky to review because chunks from two different functions are combined into a single function. Fortunately, we have comprehensive test coverage for the transforms, which instills high confidence that these changes are correct.