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- /*
- * Copyright (c) 2021, Itamar S. <itamar8910@gmail.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <AK/FlyString.h>
- #include <AK/Function.h>
- #include <AK/HashMap.h>
- #include <AK/Optional.h>
- #include <AK/String.h>
- #include <AK/StringView.h>
- #include <AK/Vector.h>
- #include <LibCpp/Token.h>
- namespace Cpp {
- class Preprocessor {
- public:
- explicit Preprocessor(const String& filename, const StringView& program);
- Vector<Token> process_and_lex();
- Vector<StringView> included_paths() const { return m_included_paths; }
- struct DefinedValue {
- String value;
- FlyString filename;
- size_t line { 0 };
- size_t column { 0 };
- };
- using Definitions = HashMap<StringView, DefinedValue>;
- struct Substitution {
- Token original_token;
- DefinedValue defined_value;
- };
- Definitions const& definitions() const { return m_definitions; }
- Vector<Substitution> const& substitutions() const { return m_substitutions; }
- void set_ignore_unsupported_keywords(bool ignore) { m_options.ignore_unsupported_keywords = ignore; }
- void set_keep_include_statements(bool keep) { m_options.keep_include_statements = keep; }
- Function<Definitions(StringView)> definitions_in_header_callback { nullptr };
- private:
- using PreprocessorKeyword = StringView;
- PreprocessorKeyword handle_preprocessor_line(StringView const&);
- void handle_preprocessor_keyword(StringView const& keyword, GenericLexer& line_lexer);
- void process_line(StringView const& line);
- void do_substitution(Token const& replaced_token, DefinedValue const&);
- String m_filename;
- String m_program;
- Vector<StringView> m_lines;
- Vector<Token> m_tokens;
- Definitions m_definitions;
- Vector<Substitution> m_substitutions;
- size_t m_line_index { 0 };
- size_t m_current_depth { 0 };
- Vector<size_t> m_depths_of_taken_branches;
- Vector<size_t> m_depths_of_not_taken_branches;
- enum class State {
- Normal,
- SkipIfBranch,
- SkipElseBranch
- };
- State m_state { State::Normal };
- Vector<StringView> m_included_paths;
- struct Options {
- bool ignore_unsupported_keywords { false };
- bool keep_include_statements { false };
- } m_options;
- };
- }
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