token_rewriter.hpp

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#ifndef LIB_RUBY_PARSER_TOKEN_REWRITER_HPP
#define LIB_RUBY_PARSER_TOKEN_REWRITER_HPP
 
#include <cstdint>
#include <cstdbool>
#include "token.hpp"
#include "shared_byte_list.hpp"
 
namespace lib_ruby_parser
{
    enum class RewriteAction
    {
        DROP,
        KEEP
    };
 
    class LexStateAction
    {
    public:
        enum class Tag
        {
            SET,
            KEEP
        };
 
        union Value
        {
            int32_t set;
        };
 
        Tag tag;
        Value as;
    };
 
    class TokenRewriterResult
    {
    public:
        Token *rewritten_token;
        RewriteAction token_action;
        LexStateAction lex_state_action;
 
        TokenRewriterResult(const TokenRewriterResult &) = default;
        TokenRewriterResult &operator=(TokenRewriterResult const &) = default;
 
        ~TokenRewriterResult();
    };
 
    class TokenRewriter;
    typedef TokenRewriterResult (*TokenRewriterFunction)(Token *, SharedByteList);
    class TokenRewriter
    {
    public:
        TokenRewriterFunction f;
 
        explicit TokenRewriter(TokenRewriterFunction f);
    };
 
    class MaybeTokenRewriter
    {
    public:
        TokenRewriter token_rewriter;
 
        explicit MaybeTokenRewriter(TokenRewriter token_rewriter);
 
        bool is_some() const;
        bool is_none() const;
 
        static MaybeTokenRewriter Some(TokenRewriter decoder);
        static MaybeTokenRewriter None();
    };
} // namespace lib_ruby_parser
 
#endif // LIB_RUBY_PARSER_TOKEN_REWRITER_HPP