Add methods to enable using formatv syntax in LLDB.

This adds formatv-backed formatting functions in various
places in LLDB such as StreamString, logging, constructing
error messages, etc.  A couple of callsites are changed
from Printf style syntax to formatv style syntax to
illustrate its usage.  Additionally, a FileSpec formatter
is introduced so that FileSpecs can be formatted natively.

Differential Revision: https://reviews.llvm.org/D27632

llvm-svn: 289922

1 files changed, 3 insertions, 3 deletions

diff --git a/lldb/source/Commands/CommandObjectApropos.cpp b/lldb/source/Commands/CommandObjectApropos.cpp
index b04d08f0136..1114a511aa0 100644
--- a/lldb/source/Commands/CommandObjectApropos.cpp
+++ b/lldb/source/Commands/CommandObjectApropos.cpp
@@ -90,9 +90,9 @@ bool CommandObjectApropos::DoExecute(Args &args, CommandReturnObject &result) {
           m_interpreter.GetDebugger().Apropos(search_word, properties);
       if (num_properties) {
         const bool dump_qualified_name = true;
-        result.AppendMessageWithFormat(
-            "\nThe following settings variables may relate to '%s': \n\n",
-            args[0].c_str());
+        result.AppendMessageWithFormatv(
+            "\nThe following settings variables may relate to '{0}': \n\n",
+            args[0].ref);
         for (size_t i = 0; i < num_properties; ++i)
           properties[i]->DumpDescription(
               m_interpreter, result.GetOutputStream(), 0, dump_qualified_name);