[PATCH] D127284: [clang-repl] Support statements on global scope in incremental mode.

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith added a comment.

In terms of the high-level direction here, I think it would make sense to approach this by adding a full-fledged language extension to Clang to allow statements at the top level (with a `-f` flag to enable it), and then enable that extension in the interpreter. The major change that shift in viewpoint provides is that we should have explicit modeling of these top-level statements in the AST, rather than having them only transiently exist until they get passed off to the AST consumer. I think I'd want to see something like `TopLevelStmtDecl` added to explicitly model the case where we parse a statement at the top level. You can then extend the various parts of Clang that deal with global variable initializers to also handle `TopLevelStmtDecl`s.


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  https://reviews.llvm.org/D127284/new/

https://reviews.llvm.org/D127284