Reapply "[C++20][Modules] Implement P1857R3 Modules Dependency Discovery"#173130

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yronglin wants to merge 3 commits intollvm:mainfrom

yronglin:p1857r3

Commits on Dec 20, 2025

Reapply "[C++20][Modules] Implement P1857R3 Modules Dependency Discovery"
yronglin
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[clang] Only propagate AtStartOfLine when expanding token stream and hit the end of TokenLexer
yronglin
committed
[clang] Fix Lexer::LangOpts use after free issue
yronglin
committed