#ifndef STRFWD_H
#define STRFWD_H
-namespace std {
-
-template<typename Char> struct char_traits;
-template<> struct char_traits<char>;
-template<> struct char_traits<wchar_t>;
-
-template<typename Alloc> class allocator;
-
-template<typename Char, typename Traits, typename Alloc> class basic_string;
-
-typedef basic_string<char, char_traits<char>, allocator<char> > string;
-
-}
-
-
#ifdef USE_WCHAR_T
// Prefer this if possible because GNU libstdc++ has usable
#else
+#if defined(_MSC_VER) && (_MSC_VER >= 1600)
+#include <cstdint>
+namespace lyx { typedef uint32_t char_type; }
+#include "support/numpunct_lyx_char_type.h" // implementation for our char_type needed
+#else
#include <boost/cstdint.hpp>
namespace lyx { typedef boost::uint32_t char_type; }
-
#endif
+#endif
-namespace lyx {
-
-typedef std::basic_string<char_type, std::char_traits<char_type>,
- std::allocator<char_type> > docstring;
+// Forward definitions do not work with libc++
+// For gcc5 with the new std::string ABI forward declarations would work in
+// principle, but I am not sure whether we want non-standard
+// "namespace __cxx11" in our sources.
+#if defined(USE_LLVM_LIBCPP) || defined(USE_GLIBCXX_CXX11_ABI)
+#include <string>
+#else
-/// Creates a docstring from a C string of ASCII characters
-docstring const from_ascii(char const *);
+namespace std {
-/// Creates a docstring from a std::string of ASCII characters
-docstring const from_ascii(std::string const &);
+template<typename Alloc> class allocator;
-/// Creates a std::string of ASCII characters from a docstring
-std::string const to_ascii(docstring const &);
+template<typename Char> struct char_traits;
+template<> struct char_traits<char>;
+#ifdef USE_WCHAR_T
+template<> struct char_traits<wchar_t>;
+#endif
-/// Creates a docstring from a UTF8 string. This should go eventually.
-docstring const from_utf8(std::string const &);
+template<typename Char, typename Traits, typename Alloc> class basic_string;
+typedef basic_string<char, char_traits<char>, allocator<char> > string;
-/// Creates a UTF8 string from a docstring. This should go eventually.
-std::string const to_utf8(docstring const &);
+template<class Char, class Traits> class basic_istream;
+template<class Char, class Traits> class basic_ostream;
+template<class Char, class Traits, class Allocator> class basic_ostringstream;
-/// convert \p s from the encoding of the locale to ucs4.
-docstring const from_local8bit(std::string const & s);
+typedef basic_istream<char, char_traits<char> > istream;
+typedef basic_ostream<char, char_traits<char> > ostream;
+typedef basic_ostringstream<char, char_traits<char>, allocator<char> > ostringstream;
-/**
- * Convert \p s from ucs4 to the encoding of the locale.
- * This may fail and throw an exception, the caller is expected to act
- * appropriately.
- */
-std::string const to_local8bit(docstring const & s);
+} // namepace std
-/// convert \p s from the encoding of the file system to ucs4.
-docstring const from_filesystem8bit(std::string const & s);
+#endif
-/// convert \p s from ucs4 to the encoding of the file system.
-std::string const to_filesystem8bit(docstring const & s);
-/// normalize \p s to precomposed form c
-docstring const normalize_c(docstring const & s);
-/// Compare a docstring with a C string of ASCII characters
-bool operator==(docstring const &, char const *);
-/// Compare a C string of ASCII characters with a docstring
-inline bool operator==(char const * l, docstring const & r) { return r == l; }
-/// Compare a docstring with a C string of ASCII characters
-inline bool operator!=(docstring const & l, char const * r) { return !(l == r); }
+namespace lyx {
-/// Compare a C string of ASCII characters with a docstring
-inline bool operator!=(char const * l, docstring const & r) { return !(r == l); }
+/**
+ * String type for storing the main text in UCS4 encoding.
+ * Use std::string only in cases 7-bit ASCII is to be manipulated
+ * within the variable.
+ */
+typedef std::basic_string<char_type, std::char_traits<char_type>,
+ std::allocator<char_type> > docstring;
-/// Concatenate a docstring and a C string of ASCII characters
-docstring operator+(docstring const &, char const *);
+/// Base class for UCS4 input streams
+typedef std::basic_istream<char_type, std::char_traits<char_type> > idocstream;
-/// Concatenate a C string of ASCII characters and a docstring
-docstring operator+(char const *, docstring const &);
+/// Base class for UCS4 output streams
+typedef std::basic_ostream<char_type, std::char_traits<char_type> > odocstream;
-/// Concatenate a docstring and a single ASCII character
-docstring operator+(docstring const & l, char r);
+/// UCS4 output stringstream
+typedef std::basic_ostringstream<char_type, std::char_traits<char_type>, std::allocator<char_type> > odocstringstream;
-/// Concatenate a single ASCII character and a docstring
-docstring operator+(char l, docstring const & r);
+#if ! defined(USE_WCHAR_T)
+extern odocstream & operator<<(odocstream &, char);
+#endif
-/// Append a C string of ASCII characters to a docstring
-docstring & operator+=(docstring &, char const *);
+// defined in lstrings.cpp
+docstring const & empty_docstring();
+std::string const & empty_string();
+// defined in docstring.cpp
+bool operator==(docstring const &, char const *);
-/// Append a single ASCII character to a docstring
-docstring & operator+=(docstring & l, char r);
+#ifdef STD_STRING_USES_COW
+template<typename Char> class trivial_string;
+typedef trivial_string<char> trivstring;
+typedef trivial_string<char_type> trivdocstring;
+#else
+typedef std::string trivstring;
+typedef docstring trivdocstring;
+#endif
} // namespace lyx
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