[clang] [clang-tools-extra] [clang] Heuristic resolution for explicit object parameter (PR #155143)

[Nathan Ridge via cfe-commits]

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@@ -41,7 +41,7 @@ template <typename InputNode, typename ParamT, typename InputMatcher,
           typename... OutputMatchers>
 void expectResolution(llvm::StringRef Code, ResolveFnT<ParamT> ResolveFn,
                       const InputMatcher &IM, const OutputMatchers &...OMS) {
-  auto TU = tooling::buildASTFromCodeWithArgs(Code, {"-std=c++23"});
+  auto TU = tooling::buildASTFromCodeWithArgs(Code, {"-std=c++20"});
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HighCommander4 wrote:

This change (from c++20 to c++23) should be kept.

(It looks like the `this auto` test case manages to pass even without it, but that looks like a bug in the test suite; code with error diagnostics should cause the test to fail.)

https://github.com/llvm/llvm-project/pull/155143