StandardLibrary.hpp

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#ifndef LLVMEXPR_FRONTEND_INFIX2POSTFIX_STANDARDLIBRARY_HPP
#define LLVMEXPR_FRONTEND_INFIX2POSTFIX_STANDARDLIBRARY_HPP
 
// Import all standard library definitions
#include "stdlib/Algorithms.hpp"
#include "stdlib/LibraryBase.hpp"
#include "stdlib/Meta.hpp"
#include "stdlib/Std.hpp"
 
#include <optional>
#include <string_view>
#include <type_traits>
#include <vector>
 
namespace infix2postfix {
 
using stdlib::ExportedFunction;
using stdlib::IsLibrary;
 
using AllStandardLibraries =
    std::tuple<stdlib::Algorithms, stdlib::Meta, stdlib::Std>;
 
namespace detail {
 
template <typename T, typename Tuple> struct tuple_contains;
 
template <typename T, typename... Us>
struct tuple_contains<T, std::tuple<Us...>>
    : std::bool_constant<(std::is_same_v<T, Us> || ...)> {};
 
template <typename T, typename Tuple>
inline constexpr bool TUPLE_CONTAINS_V = tuple_contains<T, Tuple>::value;
 
template <typename Tuple, typename T> struct TuplePushFront {
    using type =
        decltype(std::tuple_cat(std::tuple<T>{}, std::declval<Tuple>()));
};
 
template <typename Lib, typename Resolved> struct AppendIfAbsent {
    using type =
        std::conditional_t<TUPLE_CONTAINS_V<Lib, Resolved>, Resolved,
                           decltype(std::tuple_cat(std::declval<Resolved>(),
                                                   std::tuple<Lib>{}))>;
};
 
template <typename DepTuple, typename RecStack, typename Resolved>
struct resolve_deps;
 
template <IsLibrary Lib, typename RecStack, typename Resolved>
struct ResolveOne; // Forward declaration
 
template <IsLibrary Dep, typename... Deps, typename RecStack, typename Resolved>
struct resolve_deps<std::tuple<Dep, Deps...>, RecStack, Resolved> {
    using after_first = typename ResolveOne<Dep, RecStack, Resolved>::type;
    using type =
        typename resolve_deps<std::tuple<Deps...>, RecStack, after_first>::type;
};
 
template <typename RecStack, typename Resolved>
struct resolve_deps<std::tuple<>, RecStack, Resolved> {
    using type = Resolved;
};
 
template <IsLibrary Lib, typename RecStack, typename Resolved>
struct ResolveOne {
    static_assert(!TUPLE_CONTAINS_V<Lib, RecStack>,
                  "Circular dependency detected in standard libraries");
 
    using rec2 = typename TuplePushFront<RecStack, Lib>::type;
    using after_deps =
        typename resolve_deps<typename Lib::dependencies, rec2, Resolved>::type;
    using type = typename AppendIfAbsent<Lib, after_deps>::type;
};
 
} // namespace detail
 
template <IsLibrary Lib>
using ResolveLibraryDependencies =
    typename detail::ResolveOne<Lib, std::tuple<>, std::tuple<>>::type;
 
class StandardLibraryManager {
  public:
    static std::vector<std::string_view>
    resolveDependencies(std::string_view library_name);
 
    static std::optional<std::string_view>
    getLibraryCode(std::string_view library_name);
 
    static std::optional<std::vector<ExportedFunction>>
    getExports(std::string_view library_name);
};
 
} // namespace infix2postfix
 
#endif // LLVMEXPR_FRONTEND_INFIX2POSTFIX_STANDARDLIBRARY_HPP