aFunlang/include/core/parser.h

#ifndef AFUN_PARSER_H
#define AFUN_PARSER_H
#include "aFunToolExport.h"
#include "reader.h"

namespace aFuncore {
    class AFUN_CORE_EXPORT Parser {
    public:
        typedef enum LexicalStatus {
            lex_begin = 0,  // 起始类型
            lex_prefix_block_p = 1,  // 前缀括号 !
            lex_prefix_block_b = 2,  // 前缀括号 @
            lex_prefix_block_c = 3,  // 前缀括号 #
            lex_comment_before = 4,  // 注释
            lex_element_long = 5,
            lex_mutli_comment = 6,  // 多行注释
            lex_uni_comment = 7,  // 当行注释
            lex_mutli_comment_end_before = 8,  // 多行注释遇到;

            lex_prefix = -1,  // prefix类型
            lex_lp = -2,
            lex_lb = -3,
            lex_lc = -4,
            lex_rp = -5,
            lex_rb = -6,
            lex_rc = -7,
            lex_space = -8,
            lex_uni_comment_end = -9,
            lex_mutli_comment_end = -10,
            lex_nul = -11,
            lex_element_short = -12,
            lex_element_long_end = -13,
        } LexicalStatus;

        typedef enum TokenType {
            TK_ERROR = -1,
            TK_PREFIX = 0,  // 前缀
            TK_LP = 1,
            TK_LB = 2,
            TK_LC = 3,
            TK_RP = 4,
            TK_RB = 5,
            TK_RC = 6,
            TK_ELEMENT_SHORT = 7,
            TK_ELEMENT_LONG = 8,
            TK_COMMENT = 9,
            TK_SPACE = 10,
            TK_EOF = 11,
        } TokenType;

        inline explicit Parser(Reader &reader_);

        TokenType getTokenFromLexical(std::string &text);

    private:
        Reader &reader;
        struct {
            LexicalStatus status;
            TokenType token;  // token类型
            size_t last;  // 最后一次词法匹配的有效长度
            size_t mutli_comment;  // 多行注释嵌套等级
            bool is_end;
            bool is_error;
        } lexical;

        void setLexicalLast(LexicalStatus status, TokenType token);
        int doneBegin(char ch);
        int donePrefixBlock(char ch);
        int doneCommentBefore(char ch);
        int doneUniComment(char ch);
        int doneMutliComment(char ch);
        int doneMutliCommentBeforeEnd(char ch);
        int doneElementLong(char ch);
        int doneElementLongEnd(char ch);
        int doneElementShort(char ch);
        int doneSpace(char ch);
    };

}

#include "parser.inline.h"
#endif //AFUN_PARSER_H