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, 2 insertions, 2 deletions

diff --git a/lldb/source/Breakpoint/BreakpointOptions.cpp b/lldb/source/Breakpoint/BreakpointOptions.cpp
index 3168f00d5ff..65c16e22e95 100644
--- a/lldb/source/Breakpoint/BreakpointOptions.cpp
+++ b/lldb/source/Breakpoint/BreakpointOptions.cpp
@@ -86,8 +86,8 @@ BreakpointOptions::CommandData::CreateFromStructuredData(
   found_something = true;
   interp_language = ScriptInterpreter::StringToLanguage(interpreter_str);
   if (interp_language == eScriptLanguageUnknown) {
-    error.SetErrorStringWithFormat("Unknown breakpoint command language: %s.",
-                                   interpreter_str.c_str());
+    error.SetErrorStringWithFormatv("Unknown breakpoint command language: {0}.",
+                                    interpreter_str);
     return data_up;
   }
   data_up->interpreter = interp_language;