[PATCH] D39842: Allow to store precompiled preambles in memory.

Ilya Biryukov via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Thu Nov 9 06:59:27 PST 2017

ilya-biryukov created this revision.

These preambles are built by ASTUnit and clangd. Previously, preambles
were always stored on disk.

In-memory preambles are routed back to the compiler as virtual files in
a custom VFS.

Interface of ASTUnit does not allow to use in-memory preambles, as
ASTUnit::CodeComplete receives FileManager as a parameter, so we can't
change VFS used by the compiler inside the CodeComplete method.

A follow-up commit will update clangd in clang-tools-extra to use
in-memory preambles.

Proper variant-like storage for Preambles.

Final fixes and adjustments.



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