unit.hpp

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#pragma once
 
 
#include <cstdint>
#include <string_view>
 
namespace prom {
 
enum class MetricType : std::uint8_t {
    Counter,    
    Gauge,      
    Histogram,  
    Summary,    
    Untyped,    
    Info,       
    StateSet,   
};
 
[[nodiscard]] constexpr std::string_view to_string(const MetricType type) noexcept {
    switch (type) {
    case MetricType::Counter:
        return "counter";
    case MetricType::Gauge:
        return "gauge";
    case MetricType::Histogram:
        return "histogram";
    case MetricType::Summary:
        return "summary";
    case MetricType::Untyped:
        return "untyped";
    case MetricType::Info:
        return "info";
    case MetricType::StateSet:
        return "stateset";
    }
    return "unknown";
}
 
struct Unit {
    std::string_view name{};    
    std::string_view kind{};    
    std::string_view symbol{};  
    bool from_dimval = false;   
 
    [[nodiscard]] constexpr bool empty() const noexcept {
        return name.empty() && kind.empty();
    }
 
    bool operator==(const Unit&) const = default;
};
 
}  // namespace prom