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MinGW have no std::to_string #80

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MinGW have no std::to_string#80
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nlohmann
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kind: enhancement/improvement

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@Ingener74
Ingener74
opened on Jun 3, 2015

c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2015:24: error: 'to_string' is not a member of 'std'

please use somethink like that:
template
std::string to_string(T t){
std::stringstream s;
s << t;
return s.str();
}

sorry. my english is bad

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  1. nlohmann commented on Jun 3, 2015

    @nlohmann
    nlohmann
    on Jun 3, 2015
    Owner

    Thanks for reporting! Does the rest of the code compile? I am asking, because I do not want to add changes, before knowing that MinGW can work in principle. Furthermore, what version of MinGW and compiler do you use?

  2. nlohmann
    self-assigned this
    on Jun 3, 2015

  3. Ingener74 commented on Jun 3, 2015

    @Ingener74
    Ingener74
    on Jun 3, 2015
    Author

    bash-3.1$ g++.exe --version
    g++.exe (GCC) 4.8.1
    Copyright (C) 2013 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions. There is NO
    warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

    i am compile with -std=c++11 option

    and i have another some errors with MinGW
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp: In member function 'nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberFloatType, Allocator>::string_t nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberFloatType, Allocator>::dump(bool, unsigned int, unsigned int) const':
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2015:24: error: 'to_string' is not a member of 'std'
    return std::to_string(m_value.number_integer);
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2022:59: error: 'snprintf' is not a member of 'std'
    const auto sz = static_cast(std::snprintf(nullptr, 0, "%.15g", m_value.number_float));
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2022:59: note: suggested alternative:
    In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\cstdio:42:0,
    from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\random:39,
    from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\stl_algo.h:65,
    from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\algorithm:62,
    from c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:33,
    from c:/Users/Pavel/workspace/Jupiter/modules/Jupiter/src/ComplexShape.cpp:10:
    c:\mingw\include\stdio.h:330:29: note: 'snprintf'
    int __cdecl __MINGW_NOTHROW snprintf (char *, size_t, const char *, ...);
    ^
    In file included from c:/Users/Pavel/workspace/Jupiter/modules/Jupiter/src/ComplexShape.cpp:10:0:
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2024:17: error: 'snprintf' is not a member of 'std'
    std::snprintf(&buf[0], buf.size(), "%.15g", m_value.number_float);
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2024:17: note: suggested alternative:
    In file included from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\cstdio:42:0,
    from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\random:39,
    from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\bits\stl_algo.h:65,
    from c:\mingw\lib\gcc\mingw32\4.8.1\include\c++\algorithm:62,
    from c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:33,
    from c:/Users/Pavel/workspace/Jupiter/modules/Jupiter/src/ComplexShape.cpp:10:
    c:\mingw\include\stdio.h:330:29: note: 'snprintf'
    int __cdecl __MINGW_NOTHROW snprintf (char *, size_t, const char *, ...);
    ^
    In file included from c:/Users/Pavel/workspace/Jupiter/modules/Jupiter/src/ComplexShape.cpp:10:0:
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp: In member function 'void nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberFloatType, Allocator>::lexer::yyfill()':
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:4123:19: error: 'ssize_t' does not name a type
    const ssize_t offset_start = m_start - m_content;
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:4124:19: error: 'ssize_t' does not name a type
    const ssize_t offset_marker = m_marker - m_start;
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:4125:19: error: 'ssize_t' does not name a type
    const ssize_t offset_cursor = m_cursor - m_start;
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:4127:51: error: 'offset_start' was not declared in this scope
    m_buffer.erase(0, static_cast<size_t>(offset_start));
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:4134:34: error: 'offset_marker' was not declared in this scope
    m_marker = m_start + offset_marker;
    ^
    c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:4135:34: error: 'offset_cursor' was not declared in this scope
    m_cursor = m_start + offset_cursor;
    ^
    Thank's for your quick answer :)

  4. nlohmann
    added
    kind: enhancement/improvement
    on Jun 3, 2015
  5. nlohmann
    added a commit that references this issue on Jun 4, 2015

    fixed MinGW compilation (#81 and #80)

    266399d

  6. nlohmann commented on Jun 4, 2015

    @nlohmann
    nlohmann
    on Jun 4, 2015
    Owner

    Could you please try whether it works now?

  7. Ingener74 commented on Jun 4, 2015

    @Ingener74
    Ingener74
    on Jun 4, 2015
    Author

    Ok. Thank's. I'll try at home a couple of hours.

  8. nlohmann commented on Jun 4, 2015

    @nlohmann
    nlohmann
    on Jun 4, 2015
    Owner

    I could compile it with i586-mingw32-g++ (GCC) 4.8.0 for OS X (from http://crossgcc.rts-software.org/doku.php?id=compiling_for_win32).

  9. Ingener74 commented on Jun 4, 2015

    @Ingener74
    Ingener74
    on Jun 4, 2015
    Author

    i try and get error

    �[0m[ 56%] �[32mBuilding CXX object modules/Jupiter/CMakeFiles/Jupiter.dir/src/ComplexShape.cpp.obj
In file included from c:/Users/Pavel/workspace/Jupiter/modules/Jupiter/src/ComplexShape.cpp:11:0:
c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp: In member function 'void nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberFloatType, AllocatorType>::dump(std::ostream&, bool, unsigned int, unsigned int) const':
c:/Users/Pavel/workspace/Jupiter/3rdparty/json/src/json.hpp:2287:28: error: 'std::snprintf' has not been declared
                 using std::snprintf;
                            ^
make[2]: *** [modules/Jupiter/CMakeFiles/Jupiter.dir/src/ComplexShape.cpp.obj] Error 1
make[1]: *** [modules/Jupiter/CMakeFiles/Jupiter.dir/all] Error 2
make: *** [all] Error 2
�[0m

  10. Ingener74 commented on Jun 4, 2015

    @Ingener74
    Ingener74
    on Jun 4, 2015
    Author

    if delete

    using std::snprintf;

    compiles and works fine

  11. nlohmann
    added a commit that references this issue on Jun 4, 2015

    fixed float serialization (#81 and #80)

    b8d05f7

  12. nlohmann commented on Jun 4, 2015

    @nlohmann
    nlohmann
    on Jun 4, 2015
    Owner

    I adjusted the code in the last commit. I should compile now with MinGW.

  13. Ingener74
    added a commit that references this issue on Jun 4, 2015

    Merge pull request #1 from nlohmann/master

    72a741b

  14. Ingener74 commented on Jun 4, 2015

    @Ingener74
    Ingener74
    on Jun 4, 2015
    Author

    Thank you. It helped :)

  15. Ingener74
    closed this as completedon Jun 4, 2015
  16. nlohmann
    added
    kind: improvement
    on Nov 13, 2016
  17. 4og
    added a commit that references this issue on Nov 13, 2025

    Revision 1 jk (nlohmann#80)

    3b58560
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