Add clang-reorder-fields to clang-tools-extra

This diff adds v0 of clang-reorder-fields tool to clang/tools/extra.
The main idea behind this tool is to simplify and make less error-prone refactoring of large codebases when
someone needs to change the order fields of a struct/class (for example to remove excessive padding).

Differential revision: https://reviews.llvm.org/D23279

llvm-svn: 280456

1 files changed, 24 insertions, 0 deletions

diff --git a/clang-tools-extra/test/clang-reorder-fields/ClassSimpleCtor.cpp b/clang-tools-extra/test/clang-reorder-fields/ClassSimpleCtor.cpp
new file mode 100644
index 00000000000..6dc27222a58
--- /dev/null
+++ b/clang-tools-extra/test/clang-reorder-fields/ClassSimpleCtor.cpp
@@ -0,0 +1,24 @@
+// RUN: clang-reorder-fields -record-name Foo -fields-order s1,x,z,s2 %s -- | FileCheck %s
+
+class Foo {
+public:
+  Foo();
+
+private:
+  int x;              // CHECK:      {{^  const char \*s1;}}
+  const char *s1;     // CHECK-NEXT: {{^  int x;}}
+  const char *s2;     // CHECK-NEXT: {{^  double z;}}
+  double z;           // CHECK-NEXT: {{^  const char \*s2;}}
+};
+
+Foo::Foo():
+  x(12),      // CHECK:      {{^  s1\("abc"\),}}
+  s1("abc"),  // CHECK-NEXT: {{^  x\(12\),}}
+  s2("def"),  // CHECK-NEXT: {{^  z\(3.14\),}}
+  z(3.14)     // CHECK-NEXT: {{^  s2\("def"\)}}
+{}
+
+int main() {
+  Foo foo;
+  return 0;
+}