[clang-tidy] Add check: replace string::find(...) == 0 with absl::StartsWith

Patch by Niko Weh!

Reviewers: hokein

Subscribers: klimek, cfe-commits, ioeric, ilya-biryukov, ahedberg

Differential Revision: https://reviews.llvm.org/D43847

llvm-svn: 327111

1 files changed, 38 insertions, 0 deletions

diff --git a/clang-tools-extra/clang-tidy/abseil/AbseilTidyModule.cpp b/clang-tools-extra/clang-tidy/abseil/AbseilTidyModule.cpp
new file mode 100644
index 00000000000..8e427f05873
--- /dev/null
+++ b/clang-tools-extra/clang-tidy/abseil/AbseilTidyModule.cpp
@@ -0,0 +1,38 @@
+//===------- AbseilTidyModule.cpp - clang-tidy ----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "../ClangTidy.h"
+#include "../ClangTidyModule.h"
+#include "../ClangTidyModuleRegistry.h"
+#include "StringFindStartswithCheck.h"
+
+namespace clang {
+namespace tidy {
+namespace abseil {
+
+class AbseilModule : public ClangTidyModule {
+public:
+  void addCheckFactories(ClangTidyCheckFactories &CheckFactories) override {
+    CheckFactories.registerCheck<StringFindStartswithCheck>(
+        "abseil-string-find-startswith");
+  }
+};
+
+// Register the AbseilModule using this statically initialized variable.
+static ClangTidyModuleRegistry::Add<AbseilModule> X("abseil-module",
+                                                    "Add Abseil checks.");
+
+} // namespace abseil
+
+// This anchor is used to force the linker to link in the generated object file
+// and thus register the AbseilModule.
+volatile int AbseilModuleAnchorSource = 0;
+
+} // namespace tidy
+} // namespace clang