Source sweep: Replace std::ostringstream when used with a single append

This replaces `std::ostringstream`, when it is written to only once.
If the single written argument was numeric, `std::to_string` is used instead.
Otherwise, the single written argument is used directly instead of the
`std::ostringstream::str()` invocation.

1 files changed, 2 insertions, 3 deletions

diff --git a/Source/cmFileCopier.cxx b/Source/cmFileCopier.cxx
index 3156c95..38a6080 100644
--- a/Source/cmFileCopier.cxx
+++ b/Source/cmFileCopier.cxx
@@ -446,9 +446,8 @@ bool cmFileCopier::Install(const std::string& fromFile,
                            const std::string& toFile)
 {
   if (fromFile.empty()) {
-    std::ostringstream e;
-    e << "INSTALL encountered an empty string input file name.";
-    this->Status.SetError(e.str());
+    this->Status.SetError(
+      "INSTALL encountered an empty string input file name.");
     return false;
   }