[lld] r311681 - Make empty arguments visible in error messages.

[Rui Ueyama via llvm-commits]

Author: ruiu
Date: Thu Aug 24 11:34:32 2017
New Revision: 311681

URL: http://llvm.org/viewvc/llvm-project?rev=311681&view=rev
Log:
Make empty arguments visible in error messages.

Before this patch, lld printed out something like

  error: -O: number expected, but got

After this patch, it prints out the same error message like this:

  error: -O: number expected, but got ''

Fixes https://bugs.llvm.org/show_bug.cgi?id=34311

Modified:
    lld/trunk/ELF/Driver.cpp

Modified: lld/trunk/ELF/Driver.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/Driver.cpp?rev=311681&r1=311680&r2=311681&view=diff
==============================================================================
--- lld/trunk/ELF/Driver.cpp (original)
+++ lld/trunk/ELF/Driver.cpp Thu Aug 24 11:34:32 2017
@@ -283,7 +283,7 @@ static int getInteger(opt::InputArgList
   if (auto *Arg = Args.getLastArg(Key)) {
     StringRef S = Arg->getValue();
     if (!to_integer(S, V, 10))
-      error(Arg->getSpelling() + ": number expected, but got " + S);
+      error(Arg->getSpelling() + ": number expected, but got '" + S + "'");
   }
   return V;
 }