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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/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 {
Optional<StringView> value;
FlyString filename;
size_t line { 0 };
size_t column { 0 };
};
using Definitions = HashMap<StringView, DefinedValue>;
const Definitions& definitions() const { return m_definitions; }
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; }
private:
using PreprocessorKeyword = StringView;
PreprocessorKeyword handle_preprocessor_line(StringView const&);
void handle_preprocessor_keyword(StringView const& keyword, GenericLexer& line_lexer);
Vector<Token> process_line(StringView const& line);
String m_filename;
String m_program;
Definitions m_definitions;
Vector<StringView> m_lines;
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;
String m_processed_text;
struct Options {
bool ignore_unsupported_keywords { false };
bool keep_include_statements { false };
} m_options;
};
}
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