source_annotation.hpp

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#pragma once


#include <felspar/test/source.hpp>
#include <string>
#include <utility>


namespace felspar::exceptions {

Capture the source annotation for this exception

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    template<typename SC>
    class source_annotation : public SC {
        felspar::source_location loc;

      public:

Return the throw site source code location information

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        auto const &thrown_from() const { return loc; }

      protected:

Used by sub-classes that need to pass arguments to the actual exception constructor. Note that we need to pass in the source location first.

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        template<typename... Args>
        source_annotation(source_location loc, Args... args)
        : SC{std::forward<Args>(args)...}, loc{std::move(loc)} {}

Used by sub-classes that take a user-define error message to include the source location information in the message

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        static std::string
                annotate(std::string m, felspar::source_location loc) {
            m += "\n";
            m += loc.file_name();
            m += ":";
            m += std::to_string(loc.line());
            m += ":";
            m += std::to_string(loc.column());
            m += ":";
            return m;
        }
        static std::string annotate(felspar::source_location loc) {
            std::string m{loc.file_name()};
            m += loc.file_name();
            m += ":";
            m += std::to_string(loc.line());
            m += ":";
            m += std::to_string(loc.column());
            m += ":";
            return m;
        }
    };


}