Implement clang_getCanonicalCursor() in libclang, which does the obvious thing.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119874 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang-c/Index.h b/include/clang-c/Index.h
index 2fc4089..ebe74e2 100644
--- a/include/clang-c/Index.h
+++ b/include/clang-c/Index.h
@@ -2075,6 +2075,32 @@
CINDEX_LINKAGE unsigned clang_isCursorDefinition(CXCursor);
/**
+ * \brief Retrieve the canonical cursor corresponding to the given cursor.
+ *
+ * In the C family of languages, many kinds of entities can be declared several
+ * times within a single translation unit. For example, a structure type can
+ * be forward-declared (possibly multiple times) and later defined:
+ *
+ * \code
+ * struct X;
+ * struct X;
+ * struct X {
+ * int member;
+ * };
+ * \endcode
+ *
+ * The declarations and the definition of \c X are represented by three
+ * different cursors, all of which are declarations of the same underlying
+ * entity. One of these cursor is considered the "canonical" cursor, which
+ * is effectively the representative for the underlying entity. One can
+ * determine if two cursors are declarations of the same underlying entity by
+ * comparing their canonical cursors.
+ *
+ * \returns The canonical cursor for the entity referred to by the given cursor.
+ */
+CINDEX_LINKAGE CXCursor clang_getCanonicalCursor(CXCursor);
+
+/**
* @}
*/
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 9137172..9116667 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -3717,6 +3717,16 @@
return clang_getCursorDefinition(C) == C;
}
+CXCursor clang_getCanonicalCursor(CXCursor C) {
+ if (!clang_isDeclaration(C.kind))
+ return C;
+
+ if (Decl *D = getCursorDecl(C))
+ return MakeCXCursor(D->getCanonicalDecl(), getCursorTU(C));
+
+ return C;
+}
+
unsigned clang_getNumOverloadedDecls(CXCursor C) {
if (C.kind != CXCursor_OverloadedDeclRef)
return 0;
diff --git a/tools/libclang/libclang.darwin.exports b/tools/libclang/libclang.darwin.exports
index 5e8abf2..e132f7f 100644
--- a/tools/libclang/libclang.darwin.exports
+++ b/tools/libclang/libclang.darwin.exports
@@ -32,6 +32,7 @@
_clang_formatDiagnostic
_clang_getCString
_clang_getCXXAccessSpecifier
+_clang_getCanonicalCursor
_clang_getCanonicalType
_clang_getClangVersion
_clang_getCompletionAvailability
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index ca9a9d1..fce89ca 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -32,6 +32,7 @@
clang_formatDiagnostic
clang_getCString
clang_getCXXAccessSpecifier
+clang_getCanonicalCursor
clang_getCanonicalType
clang_getClangVersion
clang_getCompletionAvailability