Fixed build after UTF32 string convesion patch.

Also made converter local vars in conversion routines, instead of static global vars.

runtime/Cpp/runtime/src/ANTLRInputStream.h

@@ -16,11 +16,7 @@ namespace antlr4 {
   protected:
     /// The data being scanned.
     // UTF-32
-#if defined(_MSC_VER) && _MSC_VER == 1900
-    i32string _data; // Custom type for VS 2015.
-#else
-    std::u32string _data;
-#endif
+    UTF32String _data;
 
     /// 0..n-1 index into string of next char </summary>
     size_t p;

runtime/Cpp/runtime/src/antlr4-common.h

@@ -55,11 +55,13 @@
     typedef __int32 ssize_t;
   #endif
 
-  #if _MSC_VER == 1900
+  #if _MSC_VER >= 1900 && _MSC_VER < 2000
     // VS 2015 has a known bug when using std::codecvt_utf8<char32_t>
     // so we have to temporarily use __int32 instead.
     // https://connect.microsoft.com/VisualStudio/feedback/details/1403302/unresolved-external-when-using-codecvt-utf8
     typedef std::basic_string<__int32> i32string;
+
+    typedef i32string UTF32String;
   #endif
 
   #ifdef ANTLR4CPP_EXPORTS
@@ -72,11 +74,11 @@
     #endif
   #endif
 
-#ifdef _MSC_VER
   class ANTLR4CPP_PUBLIC std::exception; // Needed for VS 2015.
-#endif
 
 #elif __APPLE__
+  typedef std::u32string UTF32String;
+
   #define GUID_CFUUID
   #if __GNUC__ >= 4
     #define ANTLR4CPP_PUBLIC __attribute__ ((visibility ("default")))
@@ -84,6 +86,8 @@
     #define ANTLR4CPP_PUBLIC
   #endif
 #else
+  typedef std::u32string UTF32String;
+
   #define GUID_LIBUUID
   #if __GNUC__ >= 6
     #define ANTLR4CPP_PUBLIC __attribute__ ((visibility ("default")))

runtime/Cpp/runtime/src/support/StringUtils.cpp

@@ -7,29 +7,29 @@
 
 namespace antlrcpp {
 
-void replaceAll(std::string& str, const std::string& from, const std::string& to)
+void replaceAll(std::string& str, std::string const& from, std::string const& to)
 {
-  if(from.empty()) {
+  if (from.empty())
     return;
-  }
+
   size_t start_pos = 0;
-  while((start_pos = str.find(from, start_pos)) != std::string::npos) {
+  while ((start_pos = str.find(from, start_pos)) != std::string::npos) {
     str.replace(start_pos, from.length(), to);
-    start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'
+    start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'.
   }
 }
 
-std::string ws2s(const std::wstring &wstr) {
+std::string ws2s(std::wstring const& wstr) {
   std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
-
   std::string narrow = converter.to_bytes(wstr);
+
   return narrow;
 }
 
 std::wstring s2ws(const std::string &str) {
   std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
-
   std::wstring wide = converter.from_bytes(str);
+  
   return wide;
 }
 

runtime/Cpp/runtime/src/support/StringUtils.h

@@ -8,40 +8,47 @@
 #include "antlr4-common.h"
 
 namespace antlrcpp {
-  // For all conversions utf8 <-> utf32.
-  // VS 2015 and VS 2017 have different bugs in std::codecvt_utf8<char32_t> (VS 2013 works fine).
+
+// For all conversions utf8 <-> utf32.
+// VS 2015 and VS 2017 have different bugs in std::codecvt_utf8<char32_t> (VS 2013 works fine).
 #if defined(_MSC_VER) && _MSC_VER >= 1900 && _MSC_VER < 2000
-  static std::wstring_convert<std::codecvt_utf8<__int32>, __int32> utfConverter;
+  typedef std::wstring_convert<std::codecvt_utf8<__int32>, __int32> UTF32Converter;
 #else
-  static std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> utfConverter;
+  typedef std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> UTF32Converter;
 #endif
 
-  //the conversion functions fails in VS2017, so we explicitly use a workaround
+  // The conversion functions fails in VS2017, so we explicitly use a workaround.
   template<typename T>
-  inline std::string utf32_to_utf8(T _data)
+  inline std::string utf32_to_utf8(T const& data)
   {
+    // Don't make the converter static or we have to serialize access to it.
+    UTF32Converter converter;
+
     #if _MSC_VER > 1900 && _MSC_VER < 2000
-      auto p = reinterpret_cast<const int32_t *>(_data.data());
-      return antlrcpp::utfConverter.to_bytes(p, p + _data.size());
+      auto p = reinterpret_cast<const int32_t *>(data.data());
+      return converter.to_bytes(p, p + data.size());
     #else
-      return antlrcpp::utfConverter.to_bytes(_data);
+      return converter.to_bytes(data);
     #endif
   }
 
-  inline auto utf8_to_utf32(const char* first, const char* last)
+  inline UTF32String utf8_to_utf32(const char* first, const char* last)
   {
+    UTF32Converter converter;
+
     #if _MSC_VER > 1900 && _MSC_VER < 2000
-      auto r = antlrcpp::utfConverter.from_bytes(first, last);
-      std::u32string s = reinterpret_cast<const char32_t *>(r.data());
-      return s;
+      auto r = converter.from_bytes(first, last);
+      i32string s = reinterpret_cast<const int32_t *>(r.data());
     #else
-      return antlrcpp::utfConverter.from_bytes(first, last);
+      std::u32string s = converter.from_bytes(first, last);
     #endif
+    
+    return s;
   }
 
-  void replaceAll(std::string& str, const std::string& from, const std::string& to);
+  void replaceAll(std::string &str, std::string const& from, std::string const& to);
 
   // string <-> wstring conversion (UTF-16), e.g. for use with Window's wide APIs.
-  ANTLR4CPP_PUBLIC std::string ws2s(const std::wstring &wstr);
-  ANTLR4CPP_PUBLIC std::wstring s2ws(const std::string &str);
+  ANTLR4CPP_PUBLIC std::string ws2s(std::wstring const& wstr);
+  ANTLR4CPP_PUBLIC std::wstring s2ws(std::string const& str);
 }