114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
#pragma once
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#include <memory>
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#include <QList>
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#include <libtoken.h>
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#include "libsyntax.h"
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namespace ast_basic {
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// 抽象语法树 ================================================================================================
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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 Expression {
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public:
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virtual ~Expression() = default;
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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::ExpressionRule> 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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* 重置语法Token集.
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*
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* \param list
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*/
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virtual void tokensReset(const QList<std::shared_ptr<const lib_token::IToken>> &list) = 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 Expression>> 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 Expression> inst) = 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 ExpressionElement : public ast_basic::Expression, public std::enable_shared_from_this<ExpressionElement> {
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private:
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std::shared_ptr<const lib_syntax::ExpressionRule> _expr_rule;
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QList<std::shared_ptr<const Expression>> 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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ExpressionElement(std::shared_ptr<const lib_syntax::ExpressionRule> bind);
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// 通过 Expression 继承
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std::shared_ptr<const lib_syntax::ExpressionRule> 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 tokensReset(const QList<std::shared_ptr<const lib_token::IToken>>& list) 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 Expression>> children() const override;
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void addChild(std::shared_ptr<const Expression> inst) override;
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};
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class LIBSYNTAX_EXPORT ExpressionContext : public lib_syntax::ParseContext, public std::enable_shared_from_this<ExpressionContext> {
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private:
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QList<std::shared_ptr<const lib_syntax::BaseRule>> rule_stack;
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QList<std::shared_ptr<Expression>> expression_stack;
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QString current_file_path;
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QList<std::tuple<int, QString>> errors_storage;
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public:
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ExpressionContext();
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virtual void setCurrentFile(const QString& path);
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virtual QString currentFile() const;
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// 通过 ParseContext 继承
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std::shared_ptr<ast_basic::Expression> currentInst() const override;
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void pushInst(std::shared_ptr<ast_basic::Expression> current_inst) override;
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std::shared_ptr<ast_basic::Expression> popInst() override;
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std::shared_ptr<const lib_syntax::BaseRule> currentExpressionRule() const override;
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void pushExpressionRule(std::shared_ptr<const lib_syntax::BaseRule> inst) override;
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std::shared_ptr<const lib_syntax::BaseRule> popExpressionRule() override;
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virtual QList<std::shared_ptr<const lib_syntax::BaseRule>> currentExpressionRuleStack() const;
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void appendParseErrors(int start, const QString& error_msg) override;
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QStringList errors() const override;
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void clearErrors(int start) override;
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};
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} |