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74 lines
2.5 KiB
74 lines
2.5 KiB
#pragma once
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#include <stdexcept>
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#include <stacktrace>
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#include <source_location>
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#include "exopt.h"
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#include "optional.h"
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#include "util.hh"
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namespace exopt {
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// Report generated from an error. (virtual base, not abstract.)
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class Report {
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public:
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virtual ~Report();
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};
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// This is propagated returned (base, abstract)
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class Error {
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public:
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constexpr Error(Error const&) = default;
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constexpr Error(Error &&) = default;
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constexpr Error& operator=(Error &&) = default;
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constexpr Error& operator=(Error const&) = default;
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constexpr virtual std::source_location const& location() const noexcept { return m_location; }
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constexpr operator std::string_view() const noexcept { return message(); }
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constexpr virtual std::string_view message() const noexcept =0;
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constexpr virtual MaybeOwnedRef<Error> inner() noexcept { return {}; } //TODO: Maybe just use `std::optional<std::reference_wrapper<Error>>`
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constexpr virtual MaybeOwned<Report> into_report() noexcept { /* TODO */ } // XXX: ^^
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constexpr virtual MaybeOwned<Report> into_report() && noexcept { /* TODO: auto{*this}.into_report() */ }
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constexpr virtual ~Error() = default;
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protected:
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constexpr Error(std::source_location loc = std::source_location::current()) noexcept
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: m_location(std::move(loc)) {}
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private:
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std::source_location m_location;
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//Moved this to non-constexpr subclass `TracedError` \
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std::unique_ptr<std::stacktrace> m_trace{nullptr}; //TODO: Change to exopt::types::Box<> to make copy ctor/assign work
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};
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// This is propagated returned, along with a stack trace. (base, abstract)
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class TracedError : Error {
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public:
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TracedError(TracedError const &) = default;
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TracedError(TracedError &&) = default;
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TracedError& operator=(TracedError &&) = default;
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TracedError& operator=(TracedError const&) = default;
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virtual ~TracedError() = default;
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inline virtual std::stacktrace const& stacktrace() const noexcept { return m_trace; }
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protected:
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inline TracedError(
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std::source_location loc = std::source_location::current()
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, std::stacktrace trace = std::stacktrace::current()) noexcept
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: Error(std::move(loc)), m_trace(std::move(trace)) {}
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private:
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std::stacktrace m_trace; //TODO: Maybe box this? idk how big it is...
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};
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// This is thrown. (virtual base, abstract)
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class Panic : /*virtual?? I think it should be XXX*/ Error {
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//TODO: How to make a `constexpr` deduced panic that has stack-trace at runtime only? Is it needed? Hnm...
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};
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//TODO: Fatal(string) : public virtual Panic
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}
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