From 25fc71ff92e8fb940377b4f4a513d535e2eb040f Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Sun, 12 Jun 2016 11:49:05 +0800
Subject: Resolve - Fix variable scoping

---
 src/include/debug.hpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/include/debug.hpp')

diff --git a/src/include/debug.hpp b/src/include/debug.hpp
index 7e68bbfa..af8dcf10 100644
--- a/src/include/debug.hpp
+++ b/src/include/debug.hpp
@@ -49,6 +49,17 @@ public:
     TraceLog(const char* tag);
     ~TraceLog();
 };
+
+struct FmtLambda
+{
+    ::std::function<void(::std::ostream&)>  m_cb;
+    friend ::std::ostream& operator<<(::std::ostream& os, const FmtLambda& x) {
+        x.m_cb(os);
+        return os;
+    }
+};
+#define FMT_CB(os, ...)  ::FmtLambda { [&](auto& os) { __VA_ARGS__ } }
+
 #define TRACE_FUNCTION  TraceLog _tf_(__func__)
 #define TRACE_FUNCTION_F(ss)    TraceLog _tf_(__func__, FMT(ss))
 #define TRACE_FUNCTION_FR(ss,ss2)    TraceLog _tf_(__func__, FMT(ss), [&](::std::ostream&__os){ __os << ss2;})
-- 
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