[clang-tools-extra] Add refactoring tool to convert between ternary (?:) expressions and equivalent if/else statements (PR #166822)

[via cfe-commits]

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+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONDITIONALTOIFCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_CONDITIONALTOIFCHECK_H
+
+#include "../ClangTidyCheck.h"
+
+namespace clang::tidy::modernize {
+
+/// Convert between simple conditional (?:) expressions and equivalent if/else
+/// statements in safe, syntactically simple cases.
+///
+/// Direction is controlled by the option:
+///   - modernize-conditional-to-if.PreferredForm: "if" | "conditional"
+class ConditionalToIfCheck : public ClangTidyCheck {
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EugeneZelenko wrote:

Please add link to documentation. See other checks as example.

https://github.com/llvm/llvm-project/pull/166822