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7b8cede61f
* std.ArrayList gains `moveToUnmanaged` and dead code `ArrayListUnmanaged.appendWrite` is deleted. * emit_h state is attached to Module rather than Compilation. * remove the implementation of emit-h because it did not properly integrate with incremental compilation. I will re-implement it in a follow-up commit. * Compilation: use the .codegen_failure tag rather than .dependency_failure tag for when `bin_file.updateDecl` fails. C backend: * Use a CValue tagged union instead of strings for C values. * Cleanly separate state into Object and DeclGen: - Object is present only when generating a .c file - DeclGen is present for both generating a .c and .h * Move some functions into their respective Object/DeclGen namespace. * Forward decls are managed by the incremental compilation frontend; C backend no longer renders function signatures based on callsites. For simplicity, all functions always get forward decls. * Constants are managed by the incremental compilation frontend. C backend no longer has a "constants" section. * Participate in incremental compilation. Each Decl gets an ArrayList for its generated C code and it is updated when the Decl is updated. During flush(), all these are joined together in the output file. * The new CValue tagged union is used to clean up using of assigning to locals without an additional pointer local. * Fix bug with bitcast of non-pointers making the memcpy destination immutable.