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- #ifndef PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
- #define PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
- #if defined(_MSC_VER) || \
- (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
- (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
- #pragma once
- #endif
- #include <ios>
- #include <memory>
- #include "yaml-cpp/dll.h"
- namespace YAML {
- class EventHandler;
- class Node;
- class Scanner;
- struct Directives;
- struct Token;
- /**
- * A parser turns a stream of bytes into one stream of "events" per YAML
- * document in the input stream.
- */
- class YAML_CPP_API Parser {
- public:
- /** Constructs an empty parser (with no input. */
- Parser();
- Parser(const Parser&) = delete;
- Parser(Parser&&) = delete;
- Parser& operator=(const Parser&) = delete;
- Parser& operator=(Parser&&) = delete;
- /**
- * Constructs a parser from the given input stream. The input stream must
- * live as long as the parser.
- */
- explicit Parser(std::istream& in);
- ~Parser();
- /** Evaluates to true if the parser has some valid input to be read. */
- explicit operator bool() const;
- /**
- * Resets the parser with the given input stream. Any existing state is
- * erased.
- */
- void Load(std::istream& in);
- /**
- * Handles the next document by calling events on the {@code eventHandler}.
- *
- * @throw a ParserException on error.
- * @return false if there are no more documents
- */
- bool HandleNextDocument(EventHandler& eventHandler);
- void PrintTokens(std::ostream& out);
- private:
- /**
- * Reads any directives that are next in the queue, setting the internal
- * {@code m_pDirectives} state.
- */
- void ParseDirectives();
- void HandleDirective(const Token& token);
- /**
- * Handles a "YAML" directive, which should be of the form 'major.minor' (like
- * a version number).
- */
- void HandleYamlDirective(const Token& token);
- /**
- * Handles a "TAG" directive, which should be of the form 'handle prefix',
- * where 'handle' is converted to 'prefix' in the file.
- */
- void HandleTagDirective(const Token& token);
- private:
- std::unique_ptr<Scanner> m_pScanner;
- std::unique_ptr<Directives> m_pDirectives;
- };
- } // namespace YAML
- #endif // PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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