format_test -> format-test. Add support for wide char to BasicWriter.

format-test.cc

@@ -315,10 +315,7 @@ TEST(WriterTest, WriteChar) {
 }
 
 TEST(WriterTest, WriteWideChar) {
-  // TODO
+  CHECK_WRITE_WCHAR(L'a');
-  //CHECK_WRITE_WCHAR(L'a');
-  // The following line shouldn't compile:
-  CHECK_WRITE_CHAR(L'a');
 }
 
 TEST(WriterTest, WriteString) {
@@ -1423,6 +1420,20 @@ TEST(StrTest, Convert) {
   EXPECT_EQ("2012-12-9", s);
 }
 
+#if FMT_USE_INITIALIZER_LIST
+template<typename... Args>
+inline std::string Format(const StringRef &format, const Args & ... args) {
+  Writer w;
+  fmt::BasicFormatter<char> f(w, format.c_str(), {args...});
+  return fmt::str(f);
+}
+
+TEST(FormatTest, Variadic) {
+  Writer w;
+  EXPECT_EQ("Hello, world!1", str(Format("Hello, {}!{}", "world", 1)));
+}
+#endif  // FMT_USE_INITIALIZER_LIST
+
 int main(int argc, char **argv) {
 #ifdef _WIN32
   // Disable message boxes on assertion failures.

format.h

@@ -700,11 +700,19 @@ class BasicWriter {
     return *this;
   }
 
+  /**
+   * Writes a character to the stream.
+   */
   BasicWriter &operator<<(char value) {
     *GrowBuffer(1) = value;
     return *this;
   }
 
+  BasicWriter &operator<<(wchar_t value) {
+    *GrowBuffer(1) = internal::CharTraits<Char>::ConvertWChar(value);
+    return *this;
+  }
+
   /**
     Writes *value* to the stream.
    */