Example doesn't work

[cizra]

I tried to compile the example that is currently in readme, and got these errors. My environment is
clang++:

Apple LLVM version 7.3.0 (clang-703.0.29)
Target: x86_64-apple-darwin15.4.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

sqlite.cpp:36:12: error: invalid operands to binary expression ('sqlite::database' and 'const char16_t *')
        db << u"insert into user (age,name,weight) values (?,?,?);" // utf16 query string
        ~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
selkei/sneezymud/sqlite_modern_cpp/hdr/sqlite_modern_cpp.h:297:31: note: candidate function not viable: no known conversion from 'const char16_t [51]' to 'const std::string' (aka 'const basic_string<char, char_traits<char>, allocator<char> >') for 1st argument
                database_binder::chain_type operator<<(const std::string& sql) {
                                            ^
selkei/sneezymud/sqlite_modern_cpp/hdr/sqlite_modern_cpp.h:301:31: note: candidate function not viable: no known conversion from 'const char16_t [51]' to 'const char *' for 1st argument
                database_binder::chain_type operator<<(const char* sql) {
                                            ^
selkei/sneezymud/sqlite_modern_cpp/hdr/sqlite_modern_cpp.h:465:62: note: candidate function [with N = 51] not viable: no known conversion from 'sqlite::database' to 'database_binder::chain_type &' (aka 'unique_ptr<sqlite::database_binder> &') for 1st argument
        template<std::size_t N> inline database_binder::chain_type& operator <<(database_binder::chain_type& db, const char16_t(&STR)[N]) { return db << std::u16string(STR); }
                                                                    ^
selkei/sneezymud/sqlite_modern_cpp/hdr/sqlite_modern_cpp.h:530:52: note: candidate function [with T = char16_t [51]] not viable: no known conversion from 'sqlite::database' to 'database_binder::chain_type' (aka 'unique_ptr<sqlite::database_binder>') for 1st argument
        template<typename T> database_binder::chain_type& operator << (database_binder::chain_type&& db, const T& val) { return db << val; }
                                                          ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:778:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, _CharT __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:785:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, char __cn)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:818:1: note: candidate template ignored: could not match 'basic_ostream<char, type-parameter-0-0>' against 'sqlite::database'
operator<<(basic_ostream<char, _Traits>& __os, char __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:825:1: note: candidate template ignored: could not match 'basic_ostream<char, type-parameter-0-0>' against 'sqlite::database'
operator<<(basic_ostream<char, _Traits>& __os, signed char __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:832:1: note: candidate template ignored: could not match 'basic_ostream<char, type-parameter-0-0>' against 'sqlite::database'
operator<<(basic_ostream<char, _Traits>& __os, unsigned char __c)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:839:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, const _CharT* __str)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:846:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, const char* __strn)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:892:1: note: candidate template ignored: could not match 'basic_ostream<char, type-parameter-0-0>' against 'sqlite::database'
operator<<(basic_ostream<char, _Traits>& __os, const char* __str)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:899:1: note: candidate template ignored: could not match 'basic_ostream<char, type-parameter-0-0>' against 'sqlite::database'
operator<<(basic_ostream<char, _Traits>& __os, const signed char* __str)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:907:1: note: candidate template ignored: could not match 'basic_ostream<char, type-parameter-0-0>' against 'sqlite::database'
operator<<(basic_ostream<char, _Traits>& __os, const unsigned char* __str)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:1077:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os,
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:1094:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:1101:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Size>& __x)
^
selkei/sneezymud/sqlite_modern_cpp/hdr/sqlite_modern_cpp.h:433:59: note: candidate template ignored: could not match 'vector<type-parameter-0-0, allocator<type-parameter-0-0> >' against 'char16_t const[51]'
        template<typename T> inline database_binder::chain_type& operator<<(database_binder::chain_type& db, const std::vector<T>& vec) {
                                                                 ^
selkei/sneezymud/sqlite_modern_cpp/hdr/sqlite_modern_cpp.h:464:62: note: candidate template ignored: could not match 'const char' against 'const char16_t'
        template<std::size_t N> inline database_binder::chain_type& operator <<(database_binder::chain_type& db, const char(&STR)[N]) { return db << std::string(STR); }
                                                                    ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:1063:5: note: candidate template ignored: disabled by 'enable_if' [with _Stream = sqlite::database &, _Tp = char16_t [51]]
    !is_lvalue_reference<_Stream>::value &&
    ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/ostream:1086:1: note: candidate template ignored: could not match 'basic_ostream<type-parameter-0-0, type-parameter-0-1>' against 'sqlite::database'
operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __ec)
^
1 error generated.

[aminroosta]

@cizra We have forgot to overload << operator for char16_t* and std::u16string.
It have fixed it now, thank you very much. if the issue persists (which shouldn't) please let me know.