================
@@ -370,6 +379,10 @@ int main(int argc, const char **argv) {
if (Input == R"(%undo)") {
if (auto Err = Interp->Undo())
llvm::logAllUnhandledErrors(std::move(Err), llvm::errs(), "error: ");
+ } else if (Input == R"(%help)") {
+ OS << help_output << '\n';
+ } else if (Input[0] == '%') { // make sure this is evaluated last
+ OS << "Invalid % command: \"" << Input << "\". " << help_prompt;
----------------
DavidSpickett wrote:
Also I think what you've got is fine but could be improved if it were:
```
Invalid % command "<whatever>", use "%help" to list commands.
```
https://github.com/llvm/llvm-project/pull/150348
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