Using C++ STL library

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Is now in the development stage.
Using STL in C++ Smart-Contracts
Limitations
As x64-vm is running in an isolated environment it does not support system calls, so all functions from libc and from STL that use them would not compile.
The most common examples are:
I/O Streams
Multithreading
​C-style I/O, formatting​
CMake project setup and examples
Example of x64 contracts with STL support are available in tests/stl_tests/test_contracts directory. CMake files for gcc version 7 and clang 10 STL support are located in scripts directory. For gcc version 8 and version 9 STL scripts should be modified accordingly.
Compiling with AppleClang
AppleClang requires to define custom allocator in collections, so you have to instantiate string, vector and map with explicit custom allocator:
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// `stl_allocator` is defined in x86-64/contracts/libstd/stl_allocator.hpp
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​
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// Instead of std::string str;
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std_string str; // From x86-64/contracts/libstd/stl_string.hpp
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std::basic_string<char, std::char_traits<char>, stl_allocator<char>> str;
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​
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// Instead of std::vector<int> vec;
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std::vector<int, stl_allocator<int>> vec;
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​
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// Instead of std::map<std::string, int> map;
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std::map<
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    std_string, int,
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    std::less<std_string>,
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    stl_allocator<std::pair<const std_string, int>>
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> map;
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Contents

Using STL in C++ Smart-Contracts

Limitations

CMake project setup and examples