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216e21a1fa
This isn't a complete conversion to ErrorOr<void>, but a good chunk. The end goal here is to propagate buffer allocation failures to the caller, and allow the use of TRY() with formatting functions.
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Debug.h>
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#include <AK/FlyString.h>
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#include <AK/Format.h>
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#include <AK/RefCounted.h>
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#include <AK/SourceLocation.h>
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#include <LibPDF/Forward.h>
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#include <LibPDF/Value.h>
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namespace PDF {
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class Object : public RefCounted<Object> {
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public:
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virtual ~Object() = default;
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[[nodiscard]] ALWAYS_INLINE u32 generation_index() const { return m_generation_index; }
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ALWAYS_INLINE void set_generation_index(u32 generation_index) { m_generation_index = generation_index; }
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#define DEFINE_ID(_, name) \
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virtual bool is_##name() const { return false; }
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ENUMERATE_OBJECT_TYPES(DEFINE_ID)
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#undef DEFINE_ID
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virtual const char* type_name() const = 0;
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virtual String to_string(int indent) const = 0;
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private:
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u32 m_generation_index { 0 };
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};
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template<IsObject To, IsObject From>
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[[nodiscard]] ALWAYS_INLINE static NonnullRefPtr<To> object_cast(NonnullRefPtr<From> obj
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#ifdef PDF_DEBUG
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,
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SourceLocation loc = SourceLocation::current()
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#endif
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)
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{
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#ifdef PDF_DEBUG
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# define ENUMERATE_TYPES(class_name, snake_name) \
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if constexpr (IsSame<To, class_name>) { \
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if (!obj->is_##snake_name()) { \
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dbgln("{} invalid cast from type {} to type " #snake_name, loc, obj->type_name()); \
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} \
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}
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ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPES)
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# undef ENUMERATE_TYPES
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#endif
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return static_ptr_cast<To>(obj);
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}
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}
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namespace AK {
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template<PDF::IsObject T>
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struct Formatter<T> : Formatter<StringView> {
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ErrorOr<void> format(FormatBuilder& builder, T const& object)
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{
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return Formatter<StringView>::format(builder, object.to_string(0));
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}
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};
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template<PDF::IsObject T>
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struct Formatter<NonnullRefPtr<T>> : Formatter<T> {
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ErrorOr<void> format(FormatBuilder& builder, NonnullRefPtr<T> const& object)
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{
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return Formatter<T>::format(builder, *object);
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}
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};
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}
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