77 lines
1.4 KiB
C++
77 lines
1.4 KiB
C++
#pragma once
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#include <QString>
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#include <QList>
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namespace Lex {
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class LexFoundation;
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/**
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* 解析基准定义单元.
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*/
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struct LexDef
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{
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QString TokenType; // Token字符
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QString RegExpression; // 词法解析表达式
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};
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/**
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* 词法分析结果.
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*/
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struct LexResult
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{
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QString Token; // Token字符
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QString Text; // 内容
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int StartRow, StartCol, EndRow, EndCol; // 波及范围
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friend class LexFoundation;
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private:
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int index_at_segment;
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};
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/**
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* 字符提取富信息单元.
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*/
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class XChar
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{
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public:
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explicit XChar(QChar c, int row, int col);
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QChar value() const;
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int row() const;
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int col() const;
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private:
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QChar value_store;
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int row_index, col_index;
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};
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/**
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* 基础词法分析器.
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*/
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class LexFoundation
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{
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public:
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explicit LexFoundation(QList<LexDef> seqence, const QString UnknownToken);
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virtual ~LexFoundation() = default;
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/**
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* 词法分析器累积解析单个字符流.
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*
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* \param row 行
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* \param col 列
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* \param w 字符
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* \return 累积适配结果，空累积，
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*/
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QList<LexResult> push(int row, int col, const QChar w);
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private:
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QString unknown_token;
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QList<QChar> empty_seq;
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QList<XChar> code_acc;
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QList<LexDef> lexical_seq;
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QList<LexResult> lexical_parse(const QString &segment);
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};
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}
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