[clang-tools-extra] [clangd] [C++20] [Modules] Introduce initial support for C++20 Modules (PR #66462)

[kadir çetinkaya via cfe-commits]

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@@ -149,9 +154,13 @@ struct PreambleBuildStats {
 /// If \p PreambleCallback is set, it will be run on top of the AST while
 /// building the preamble.
 /// If Stats is not non-null, build statistics will be exported there.
+/// If \p RequiredModuleBuilder is not null, it will scan the source file
+/// to see if it is related to modules, and if yes, modules related things
+/// will be built.
 std::shared_ptr<const PreambleData>
 buildPreamble(PathRef FileName, CompilerInvocation CI,
               const ParseInputs &Inputs, bool StoreInMemory,
+              ModulesBuilder *RequiredModuleBuilder,
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kadircet wrote:

we should be using builder from `Inputs` now

https://github.com/llvm/llvm-project/pull/66462