system/serenity
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AK: Allow subclassing Error

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This commit is contained in:
Andreas Kling 2021-11-07 01:30:35 +01:00
parent b2170c11a4
commit e253cf694e
1 changed files with 13 additions and 11 deletions
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24
AK/Error.h
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@ -28,12 +28,13 @@ public:
int code() const { return m_code; }
StringView string_literal() const { return m_string_literal; }
private:
protected:
Error(int code)
: m_code(code)
{
}
private:
Error(StringView string_literal)
: m_string_literal(string_literal)
{
@ -43,7 +44,7 @@ private:
StringView m_string_literal;
};
template<typename T>
template<typename T, typename ErrorType = Error>
class [[nodiscard]] ErrorOr {
public:
ErrorOr(T const& value)
@ -63,7 +64,7 @@ public:
}
#endif
ErrorOr(Error&& error)
ErrorOr(ErrorType&& error)
: m_error(move(error))
{
}
@ -78,20 +79,20 @@ public:
bool is_error() const { return m_error.has_value(); }
T release_value() { return m_value.release_value(); }
Error release_error() { return m_error.release_value(); }
ErrorType release_error() { return m_error.release_value(); }
T release_value_but_fixme_should_propagate_errors() { return release_value(); }
private:
Optional<T> m_value;
Optional<Error> m_error;
Optional<ErrorType> m_error;
};
// Partial specialization for void value type
template<>
class [[nodiscard]] ErrorOr<void> {
template<typename ErrorType>
class [[nodiscard]] ErrorOr<void, ErrorType> {
public:
ErrorOr(Error error)
ErrorOr(ErrorType error)
: m_error(move(error))
{
}
@ -101,12 +102,13 @@ public:
ErrorOr(const ErrorOr& other) = default;
~ErrorOr() = default;
Error& error() { return m_error.value(); }
ErrorType& error() { return m_error.value(); }
bool is_error() const { return m_error.has_value(); }
Error release_error() { return m_error.release_value(); }
ErrorType release_error() { return m_error.release_value(); }
void release_value() { }
private:
Optional<Error> m_error;
Optional<ErrorType> m_error;
};
template<>