FormattingUtils.h

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#pragma once
 
#include <spdlog/fmt/bundled/ostream.h>
#include <spdlog/fmt/bundled/ranges.h>
 
#include <Eigen/Core>
#include <concepts>
 
#include "mathlib_export.h"
 
namespace MathLib
{
struct EigenIOFormat
{
    static MATHLIB_EXPORT const Eigen::IOFormat full_precision;
};
struct EigenIOFormat {…};
}  // namespace MathLib
 
// disable fmt's range formatting for Eigen types
template <typename T>
    requires std::derived_from<T, Eigen::DenseBase<T>>
struct fmt::is_range<T, char> : std::false_type
{
};
struct fmt::is_range<T, char> : std::false_type {…};
 
template <typename T>
    requires std::derived_from<T, Eigen::DenseBase<T>>
struct fmt::formatter<T> : fmt::ostream_formatter
{
    auto format(T const& value, fmt::format_context& ctx) const
    {
        return fmt::ostream_formatter::format(
            value.format(MathLib::EigenIOFormat::full_precision), ctx);
    }
    auto format(T const& value, fmt::format_context& ctx) const {…}
};
struct fmt::formatter<T> : fmt::ostream_formatter {…};