[clang-tools-extra] [clang-tidy] Add modernize-use-std-tie check (PR #191218)

[Daniil Dudkin via cfe-commits]

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@@ -0,0 +1,108 @@
+#include "UseStdTieCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/Lex/Lexer.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::modernize {
+
+void UseStdTieCheck::registerMatchers(MatchFinder *Finder) {
+  Finder->addMatcher(functionDecl(anyOf(hasOverloadedOperatorName("<"),
+                                        hasOverloadedOperatorName(">")))
+                         .bind("bad-operator"),
+                     this);
+}
+
+void UseStdTieCheck::check(const MatchFinder::MatchResult &Result) {
+  const auto *MatchedDecl =
+      Result.Nodes.getNodeAs<FunctionDecl>("bad-operator");
+  if (!MatchedDecl || !MatchedDecl->hasBody())
+    return;
+
+  // 1. SIMPLE SCANNER: Find all 'return' statements inside the function
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unterumarmung wrote:

Please do not use CAPS. 

https://github.com/llvm/llvm-project/pull/191218