116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
// Copyright (C) 2017 Jonathan Müller <jonathanmueller.dev@gmail.com>
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// This file is subject to the license terms in the LICENSE file
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// found in the top-level directory of this distribution.
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#ifndef CPPAST_PARSER_HPP_INCLUDED
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#define CPPAST_PARSER_HPP_INCLUDED
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#include <atomic>
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#include <cppast/compile_config.hpp>
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#include <cppast/cpp_file.hpp>
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namespace cppast
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{
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class cpp_entity_index;
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struct diagnostic;
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/// Base class for a [cppast::diagnostic]() logger.
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///
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/// Its task is controlling how diagnostic are being displayed.
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class diagnostic_logger
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{
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public:
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diagnostic_logger() noexcept : error_(false)
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{
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}
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diagnostic_logger(const diagnostic_logger&) = delete;
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diagnostic_logger& operator=(const diagnostic_logger&) = delete;
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virtual ~diagnostic_logger() noexcept = default;
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/// \effects Logs the diagnostic by invoking the `do_log()` member function.
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/// \returns Whether or not the diagnostic was logged.
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/// \notes `source` points to a string literal that gives additional context to what generates the message.
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bool log(const char* source, const diagnostic& d) const;
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/// \returns Whether or not a diagnostic of [severity::error]() was logged.
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/// \notes If an error happens, the parser will still continue to build the AST,
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/// unless the error is critical
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/// so the result will be incomplete if this function returns `true`.
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bool error_logged() const noexcept
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{
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return error_;
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}
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/// \effects Sets whether or not the logger prints debugging diagnostics.
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void set_verbose(bool value) noexcept
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{
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verbose_ = value;
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}
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/// \returns Whether or not the logger prints debugging diagnostics.
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bool is_verbose() const noexcept
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{
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return verbose_;
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}
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private:
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virtual bool do_log(const char* source, const diagnostic& d) const = 0;
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mutable std::atomic<bool> error_;
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bool verbose_ = false;
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};
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/// A [cppast::diagnostic_logger]() that logs to `stderr`.
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///
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/// It prints all diagnostics in an implementation-defined format.
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class stderr_diagnostic_logger final : public diagnostic_logger
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{
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private:
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bool do_log(const char* source, const diagnostic& d) const override;
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};
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/// Base class for a parser.
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///
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/// It reads a C++ source file and creates the matching [cppast::cpp_file]().
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class parser
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{
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public:
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parser(const parser&) = delete;
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parser& operator=(const parser&) = delete;
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virtual ~parser() noexcept = default;
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/// \effects Parses the given file.
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/// \returns The [cppast::cpp_file]() object describing it.
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/// \requires The dynamic type of `config` must match the required config type.
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std::unique_ptr<cpp_file> parse(const cpp_entity_index& idx, std::string path,
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const compile_config& config) const
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{
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return do_parse(idx, std::move(path), config);
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}
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protected:
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/// \effects Creates it giving it a reference to the logger it uses.
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explicit parser(type_safe::object_ref<const diagnostic_logger> logger) : logger_(logger)
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{
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}
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/// \returns A reference to the logger used.
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const diagnostic_logger& logger() const noexcept
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{
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return *logger_;
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}
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private:
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/// \effects Parses the given file.
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/// \returns The [cppast::cpp_file]() object describing it.
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virtual std::unique_ptr<cpp_file> do_parse(const cpp_entity_index& idx, std::string path,
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const compile_config& config) const = 0;
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type_safe::object_ref<const diagnostic_logger> logger_;
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};
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} // namespace cppast
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#endif // CPPAST_PARSER_HPP_INCLUDED
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