[clangd] Fix off-by-one error in CommandMangler #156593
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SawInput() is intended to be called for every argument after a `--`, but it was mistakenly being called for the `--` itself. Partially fixes clangd/clangd#1850
HighCommander4
commented
Sep 3, 2025
| tooling::CompileCommand Cmd; | ||
| Cmd.CommandLine = {"clang-cl", "-std:c++latest", "--", "/Users/foo.cc"}; | ||
| Mangler(Cmd, "/Users/foo.cc"); | ||
| // Check that the -std:c++latest flag is not dropped |
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Not sure if this is the best test case for this change. -std:c++latest being dropped in transferCompileCommand() is a separate bug that will hopefully be fixed in the near future.
But I'm not sure how to write a more direct test for "transferCompileCommand() was not called", and the scenario being tested here is a valid one from a user expectation point of view.
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SawInput() is intended to be called for every argument after a
--, but it was mistakenly being called for the--itself.Partially fixes clangd/clangd#1850