Improve locale support

test/locale-test.cc

@@ -0,0 +1,21 @@
+// Formatting library for C++ - core tests
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/locale.h"
+#include "gmock.h"
+
+struct numpunct : std::numpunct<char> {
+ protected:
+  char do_thousands_sep() const FMT_OVERRIDE { return '~'; }
+};
+
+TEST(LocaleTest, Format) {
+  std::locale loc;
+  EXPECT_EQ("1~234~567",
+            fmt::format(std::locale(loc, new numpunct()), "{:n}", 1234567));
+  EXPECT_EQ("1,234,567", fmt::format(loc, "{:n}", 1234567));
+}