This patch implements an AST matching framework that allows to write

tools that match on the C++ ASTs. The main interface is in ASTMatchers.h,
an example implementation of a tool that removes redundant .c_str() calls
is in the example RemoveCStrCalls.cpp.

Various contributions:
Zhanyong Wan, Chandler Carruth, Marcin Kowalczyk, Wei Xu, James Dennett.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132374 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 0 deletions

diff --git a/test/Tooling/remove-cstr-calls.cpp b/test/Tooling/remove-cstr-calls.cpp
new file mode 100644
index 0000000000..a43960aec5
--- /dev/null
+++ b/test/Tooling/remove-cstr-calls.cpp
@@ -0,0 +1,20 @@
+// RUN: rm -rf %t
+// RUN: mkdir %t
+// RUN: echo '[{"directory":".","command":"clang++ '$(llvm-config --cppflags all)' -c %s","file":"%s"}]' > %t/compile_commands.json
+// RUN: remove-cstr-calls %t %s | FileCheck %s
+
+#include <string>
+
+namespace llvm { struct StringRef { StringRef(const char *p); }; }
+
+void f1(const std::string &s) {
+  f1(s.c_str());  // CHECK:remove-cstr-calls.cpp:11:6:11:14:s
+}
+void f2(const llvm::StringRef r) {
+  std::string s;
+  f2(s.c_str());  // CHECK:remove-cstr-calls.cpp:15:6:15:14:s
+}
+void f3(const llvm::StringRef &r) {
+  std::string s;
+  f3(s.c_str());  // CHECK:remove-cstr-calls.cpp:19:6:19:14:s
+}