115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
#pragma once
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#include <memory>
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#include <QList>
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#include "libtokens.h"
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namespace lib_syntax {
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class ExprRule;
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}
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// 抽象语法树结构 ====================================================================
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namespace ast_basic {
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/**
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* @brief 抽象语法树集合节点/表达式节点
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*/
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class IExprInstance {
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public:
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/**
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* @brief 获取表达式的解析规则
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* @return
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*/
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virtual std::shared_ptr<const lib_syntax::ExprRule> definedRule() const = 0;
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//=====================================================
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/**
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* 获取语法节点的源码文件路径.
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*
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* \return 文件路径
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*/
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virtual QString filePath() const = 0;
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/**
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* 获取语法节点关联token序列.
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*
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* \return token序列
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*/
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virtual QList<std::shared_ptr<const lib_token::IToken>> tokens() const = 0;
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/**
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* 解析过程中，向表达式内部添加token实例.
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*
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* \param token_inst 实例
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*/
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virtual void addToken(std::shared_ptr<const lib_token::IToken> token_inst) = 0;
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//=====================================================
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/**
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* @brief 子表达式集合
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* @return
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*/
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virtual QList<std::shared_ptr<const IExprInstance>> children() const = 0;
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/**
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* @brief 添加子表达式.
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*
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* \param inst 子表达式实例
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*/
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virtual void addChild(std::shared_ptr<const IExprInstance> inst) = 0;
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/**
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* @brief 设置父表达式.
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*
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* \param pinst
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*/
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virtual void setParent(std::weak_ptr<const IExprInstance> pinst) = 0;
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virtual std::weak_ptr<const IExprInstance> parentExpr() const = 0;
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};
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// 基础语法树构成 ==========================================================================================
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/**
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* @brief 表达式节点
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*/
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class LIBSYNTAX_EXPORT ExprInstance : public IExprInstance, public std::enable_shared_from_this<ExprInstance> {
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private:
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std::weak_ptr<const IExprInstance > _parent_bind;
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std::shared_ptr<const lib_syntax::ExprRule> _expr_rule;
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QList<std::shared_ptr<const IExprInstance>> children_store;
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QList<std::shared_ptr<const lib_token::IToken>> tokens_bind;
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public:
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ExprInstance(std::shared_ptr<const lib_syntax::ExprRule> bind);
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// 通过 Expression 继承
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std::shared_ptr<const lib_syntax::ExprRule> definedRule() const override;
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QString filePath() const override;
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QList<std::shared_ptr<const lib_token::IToken>> tokens() const override;
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void addToken(std::shared_ptr<const lib_token::IToken> token_inst) override;
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QList<std::shared_ptr<const IExprInstance>> children() const override;
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void addChild(std::shared_ptr<const IExprInstance> inst) override;
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virtual void setParent(std::weak_ptr<const IExprInstance> pinst) override;
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virtual std::weak_ptr<const IExprInstance> parentExpr() const override;
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};
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/**
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* @brief 表达式树根节点
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*/
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class LIBSYNTAX_EXPORT ExprProgram : public IExprInstance, public std::enable_shared_from_this<ExprProgram> {
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private:
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QList<std::shared_ptr<const IExprInstance>> _children_store;
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QString _program_root;
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public:
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ExprProgram(const QString &root);
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// 通过 IExprInstance 继承
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std::shared_ptr<const lib_syntax::ExprRule> definedRule() const override;
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QString filePath() const override;
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QList<std::shared_ptr<const lib_token::IToken>> tokens() const override;
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void addToken(std::shared_ptr<const lib_token::IToken> token_inst) override;
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QList<std::shared_ptr<const IExprInstance>> children() const override;
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void addChild(std::shared_ptr<const IExprInstance> inst) override;
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void setParent(std::weak_ptr<const IExprInstance> pinst) override;
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std::weak_ptr<const IExprInstance> parentExpr() const override;
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};
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} |