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LibWeb: Propagate errors from CSS Parser construction
This requires Parser to be movable, so we remove the `default` destructors from Parser and TokenStream, and give them both move constructors. Since TokenStream only holds a reference to its tokens, (and it needs to, to avoid copying when given eg a function's contents,) we add a manual move constructor for Parser which creates a new TokenStream from the new Parser's tokens, and then manually copies the old TokenStream's state.
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3 changed files with 47 additions and 22 deletions
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2020-2021, the SerenityOS developers.
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* Copyright (c) 2021-2022, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -60,8 +60,7 @@ public:
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{
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}
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TokenStream(TokenStream<T> const&) = delete;
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~TokenStream() = default;
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TokenStream(TokenStream<T>&&) = default;
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bool has_next_token()
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{
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@ -123,6 +122,11 @@ public:
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}
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}
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void copy_state(Badge<Parser>, TokenStream<T> const& other)
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{
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m_iterator_offset = other.m_iterator_offset;
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}
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private:
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Vector<T> const& m_tokens;
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int m_iterator_offset { -1 };
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