a59ebdac2d
It turns out return a ThrowCompletionOr<T const&> is flawed, as the GCC expansion trick used with TRY will always make a copy. PrimitiveString is luckily the only such use case.
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, Linus Groh <linusg@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/DeprecatedString.h>
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#include <AK/Optional.h>
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#include <AK/StringView.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Utf16String.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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class PrimitiveString final : public Cell {
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JS_CELL(PrimitiveString, Cell);
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public:
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[[nodiscard]] static NonnullGCPtr<PrimitiveString> create(VM&, Utf16String);
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[[nodiscard]] static NonnullGCPtr<PrimitiveString> create(VM&, DeprecatedString);
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[[nodiscard]] static NonnullGCPtr<PrimitiveString> create(VM&, PrimitiveString&, PrimitiveString&);
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virtual ~PrimitiveString();
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PrimitiveString(PrimitiveString const&) = delete;
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PrimitiveString& operator=(PrimitiveString const&) = delete;
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bool is_empty() const;
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u32 hash() const;
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ThrowCompletionOr<DeprecatedString> deprecated_string() const;
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bool has_utf8_string() const { return m_utf8_string.has_value(); }
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ThrowCompletionOr<Utf16String> utf16_string() const;
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ThrowCompletionOr<Utf16View> utf16_string_view() const;
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bool has_utf16_string() const { return m_utf16_string.has_value(); }
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ThrowCompletionOr<Optional<Value>> get(VM&, PropertyKey const&) const;
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private:
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explicit PrimitiveString(PrimitiveString&, PrimitiveString&);
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explicit PrimitiveString(DeprecatedString);
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explicit PrimitiveString(Utf16String);
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virtual void visit_edges(Cell::Visitor&) override;
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ThrowCompletionOr<void> resolve_rope_if_needed() const;
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mutable bool m_is_rope { false };
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mutable PrimitiveString* m_lhs { nullptr };
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mutable PrimitiveString* m_rhs { nullptr };
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mutable Optional<DeprecatedString> m_utf8_string;
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mutable Optional<Utf16String> m_utf16_string;
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};
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}
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