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, 18 insertions, 0 deletions

diff --git a/clang-tools-extra/test/clang-reorder-fields/CStructAmbiguousName.cpp b/clang-tools-extra/test/clang-reorder-fields/CStructAmbiguousName.cpp
new file mode 100644
index 00000000000..e1e6645511d
--- /dev/null
+++ b/clang-tools-extra/test/clang-reorder-fields/CStructAmbiguousName.cpp
@@ -0,0 +1,18 @@
+// RUN: clang-reorder-fields -record-name ::Foo -fields-order y,x %s -- | FileCheck %s
+
+struct Foo {
+  int x;    // CHECK:      {{^  double y;}}
+  double y; // CHECK-NEXT: {{^  int x;}}
+};
+
+namespace bar {
+struct Foo {
+  int x;    // CHECK:      {{^  int x;}}
+  double y; // CHECK-NEXT: {{^  double y;}}
+};
+} // end namespace bar
+
+int main() {
+  bar::Foo foo = { 1, 1.7 }; // CHECK: {{^  bar::Foo foo = { 1, 1.7 };}}
+  return 0;
+}