to_wstring added

doc/api.rst

@@ -262,6 +262,8 @@ Utilities
 
 .. doxygenfunction:: fmt::to_string(const T&)
 
+.. doxygenfunction:: fmt::to_wstring(const T&)
+
 .. doxygenclass:: fmt::BasicStringRef
    :members:
 

fmt/string.h

@@ -125,6 +125,24 @@ std::string to_string(const T &value) {
   w << value;
   return w.str();
 }
+
+/**
+  \rst
+  Converts *value* to ``std::wstring`` using the default format for type *T*.
+
+  **Example**::
+
+    #include "fmt/string.h"
+
+    std::wstring answer = fmt::to_wstring(42);
+  \endrst
+ */
+template <typename T>
+std::wstring to_wstring(const T &value) {
+  fmt::WMemoryWriter w;
+  w << value;
+  return w.str();
+}
 }
 
 #endif  // FMT_STRING_H_

test/string-test.cc

@@ -78,3 +78,7 @@ TEST(StringWriterTest, WString) {
 TEST(StringTest, ToString) {
   EXPECT_EQ("42", fmt::to_string(42));
 }
+
+TEST(StringTest, ToWString) {
+  EXPECT_EQ(L"42", fmt::to_wstring(42));
+}