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f3db548a3d
DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021, Itamar S. <itamar8910@gmail.com>
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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/DeprecatedFlyString.h>
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#include <AK/DeprecatedString.h>
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#include <AK/Function.h>
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#include <AK/HashMap.h>
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#include <AK/Optional.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <LibCpp/Token.h>
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namespace Cpp {
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class Preprocessor {
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public:
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explicit Preprocessor(DeprecatedString const& filename, StringView program);
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Vector<Token> process_and_lex();
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Vector<StringView> included_paths() const { return m_included_paths; }
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struct Definition {
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DeprecatedString key;
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Vector<DeprecatedString> parameters;
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DeprecatedString value;
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DeprecatedFlyString filename;
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size_t line { 0 };
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size_t column { 0 };
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};
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using Definitions = HashMap<DeprecatedString, Definition>;
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struct Substitution {
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Vector<Token> original_tokens;
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Definition defined_value;
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DeprecatedString processed_value;
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};
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Definitions const& definitions() const { return m_definitions; }
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Vector<Substitution> const& substitutions() const { return m_substitutions; }
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void set_ignore_unsupported_keywords(bool ignore) { m_options.ignore_unsupported_keywords = ignore; }
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void set_ignore_invalid_statements(bool ignore) { m_options.ignore_invalid_statements = ignore; }
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void set_keep_include_statements(bool keep) { m_options.keep_include_statements = keep; }
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Function<Definitions(StringView)> definitions_in_header_callback { nullptr };
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Vector<Token> const& unprocessed_tokens() const { return m_unprocessed_tokens; }
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private:
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void handle_preprocessor_statement(StringView);
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void handle_include_statement(StringView);
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void handle_preprocessor_keyword(StringView keyword, GenericLexer& line_lexer);
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DeprecatedString remove_escaped_newlines(StringView value);
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size_t do_substitution(Vector<Token> const& tokens, size_t token_index, Definition const&);
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Optional<Definition> create_definition(StringView line);
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struct MacroCall {
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Token name;
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struct Argument {
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Vector<Token> tokens;
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};
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Vector<Argument> arguments;
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size_t end_token_index { 0 };
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};
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Optional<MacroCall> parse_macro_call(Vector<Token> const& tokens, size_t token_index);
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DeprecatedString evaluate_macro_call(MacroCall const&, Definition const&);
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DeprecatedString m_filename;
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DeprecatedString m_program;
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Vector<Token> m_unprocessed_tokens;
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Vector<Token> m_processed_tokens;
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Definitions m_definitions;
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Vector<Substitution> m_substitutions;
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size_t m_current_line { 0 };
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size_t m_current_depth { 0 };
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Vector<size_t> m_depths_of_taken_branches;
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Vector<size_t> m_depths_of_not_taken_branches;
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enum class State {
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Normal,
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SkipIfBranch,
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SkipElseBranch
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};
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State m_state { State::Normal };
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Vector<StringView> m_included_paths;
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struct Options {
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bool ignore_unsupported_keywords { false };
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bool ignore_invalid_statements { false };
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bool keep_include_statements { false };
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} m_options;
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};
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}
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