clang-format: Don't allow -i when reading from stdin.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236592 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/tools/clang-format/ClangFormat.cpp b/tools/clang-format/ClangFormat.cpp
index f611f70246ee74a3b64098a15c01c8821d0356e2..fe7d678852d9d99d3d6e067f82b8dbf48b9eb424 100644 (file)
--- a/tools/clang-format/ClangFormat.cpp
+++ b/tools/clang-format/ClangFormat.cpp
@@ -247,7 +247,9 @@ static bool format(StringRef FileName) {
     Rewriter Rewrite(Sources, LangOptions());
     tooling::applyAllReplacements(Replaces, Rewrite);
     if (Inplace) {
-      if (Rewrite.overwriteChangedFiles())
+      if (FileName == "-")
+        llvm::errs() << "error: cannot use -i when reading from stdin.\n";
+      else if (Rewrite.overwriteChangedFiles())
         return true;
     } else {
       if (Cursor.getNumOccurrences() != 0)