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Ast.h
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Ast.h
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#pragma once
#include<string>
#include<vector>
#include"Quaternion.h"
#include"Memory.h"
#include"common.h"
#include<memory>
//Ast树的节点基类
class AstNode
{
public:
int line, column;
AstNode() {};
AstNode(int _line, int _column) :line(_line), column(_column) {}
//分析语法后生成中间码
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table) { return operand(); }
~AstNode() {};
};
//表达式基类
class Expression : public AstNode
{
//在上下文寻找变量
public:
Expression(int _line, int _column) :AstNode(_line, _column) {}
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table) { return operand(); }
~Expression() {}
};
//bool表达式
class BoolExpression : public Expression
{
public:
BoolExpression(bool _value, int _line, int _column) :Expression(_line, _column), exp_value(_value) {}
//表达式的值
bool exp_value;
//表达式解析
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table) { return operand(); }
~BoolExpression() {}
};
//浮点表达式
class FloatExpression : public Expression
{
public:
FloatExpression(float _value, int _line, int _column) :Expression(_line, _column), exp_value(_value) {}
//表达式的值
float exp_value;
~FloatExpression() {}
};
//字符表达式
class CharExpression : public Expression
{
public:
CharExpression(char _value, int _line, int _column) :Expression(_line, _column), exp_value(_value) {}
//表达式的值
char exp_value;
~CharExpression() {}
};
//字符串表达式
class StringExpression : public Expression
{
public:
StringExpression(std::string _value, int _line, int _column) :Expression(_line, _column), exp_value(_value) {}
//表达式的值
std::string exp_value;
~StringExpression() {}
};
//整形表达式
class IntExpression : public Expression
{
public:
IntExpression(int _value, int _line, int _column) :Expression(_line, _column), exp_value(_value) {}
//表达式的值
int exp_value;
//表达式求值
virtual operand evaluation(std::vector<Quaternion>& stms, Memory& memory, NameTable& table);
~IntExpression() {}
};
//标识符表达式
class IdentifierExpression : public Expression
{
public:
IdentifierExpression(std::string identName, int _line, int _column) :Expression(_line, _column), exp_name(move(identName)) {}
std::string exp_name;
//表达式解析
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table);
~IdentifierExpression() {}
};
//二元表达式
class BinaryExpression : public Expression
{
public:
BinaryExpression(int _line, int _column) :
Expression(_line, _column) {}
//左表达式分支
std::shared_ptr<Expression> left_expression = nullptr;
//操作符
Token opt;
//右表达式分支
std::shared_ptr<Expression> right_expression = nullptr;
//表达式解析
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table);
};
//赋值表达式
class AssignExpression : public Expression
{
public:
AssignExpression(int _line, int _column) :Expression(_line, _column) {}
//左值表达式
std::shared_ptr<Expression> left_value;
//运算符
Token opt;
//右值表达式
std::shared_ptr<Expression> right_value;
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table);
~AssignExpression() {}
};
//寻址表达式
class AddressingExpression : public Expression
{
public:
AddressingExpression(int _line, int _column) :Expression(_line, _column) {}
//基地址
std::shared_ptr<Expression> base;
//下标,偏移地址
std::vector<std::shared_ptr<Expression>> offset;
~AddressingExpression(){}
};
//数组值表达式
class ArrayValueExpression : public Expression
{
public:
ArrayValueExpression(int _line, int _column) :Expression(_line, _column) {}
//数值表达式
std::vector<std::shared_ptr<Expression>> exprs;
~ArrayValueExpression() {}
};
//语句
class Statement : public AstNode
{
public:
Statement(int _line, int _column) :AstNode(_line, _column) {}
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table) { return operand(); }
~Statement() {}
};
//表达式语句
class ExpressionStatement : public Statement
{
public:
ExpressionStatement(std::shared_ptr<Expression> expr, int _line, int _column) :Statement(_line, _column), expression(expr) {}
//包含一个表达式,其中包括赋值,函数调用,一元二元计算
std::shared_ptr<Expression> expression;
virtual operand evaluation(std::vector<Quaternion>& stms, Memory& memory, NameTable& table)
{
return expression->evaluation(stms, memory, table);
}
~ExpressionStatement() {}
};
//变量声明语句
class VariableDeclareStatement : public Statement
{
public:
VariableDeclareStatement(int _line, int _column) :Statement(_line, _column) {}
//类型
Token type;
//类型名字
std::string typeName;
//标识符表达式
//std::string identName;
std::shared_ptr<Expression> ident;
//表达式解析
virtual operand evaluation(std::vector<Quaternion>& context, Memory& memory, NameTable& table);
~VariableDeclareStatement() {}
};
//数组声明语句
class ArrayDeclareStatement :public Statement
{
public:
ArrayDeclareStatement(int _line, int _column) :Statement(_line, _column) {}
//数组类型
Token type;
//类型名
std::string typeName;
//数组元素个数
std::vector<std::shared_ptr<Expression>> elementNums;
//数组名字
std::string name;
//数组初始值
std::shared_ptr<Expression> initValue;
~ArrayDeclareStatement() {}
};
//代码块表达式
class CodeBlockStatement : public Statement
{
public:
CodeBlockStatement(int _line, int _column) :Statement(_line, _column) {}
//代码块
std::vector<std::shared_ptr<Statement>> statements;
~CodeBlockStatement() {}
};
//函数声明表达式
class FunctionDeclareStatement :public Statement
{
public:
FunctionDeclareStatement(int _line, int _column) :Statement(_line, _column) {}
//类型
Token type;
//类型名字
std::string typeName;
//函数名
std::string functionName;
//函数参数列表,参数列表中必须都是声明表达式
std::vector<std::shared_ptr<Statement>> argsList;
//代码块
std::shared_ptr<CodeBlockStatement> block;
~FunctionDeclareStatement(){}
};