update

.gitignore

@@ -1 +1,3 @@
 /build
+/.cache
+/.vscode

include/Lexer.hpp

@@ -0,0 +1,2 @@
+#pragma once
+

include/Parser.hpp

@@ -1,114 +0,0 @@
-#pragma once
-
-#include <concepts>
-#include <cstddef>
-#include <iostream>
-#include <optional>
-#include <stdexcept>
-#include <string>
-#include <concepts>
-
-namespace ztl{
-    struct Code{
-        const std::string _str;
-        std::optional<char> getStr(size_t n)const{return idx+n>=_str.size()?std::nullopt:std::optional<char>{_str[idx+n]};};
-        size_t idx=0;
-        std::optional<char> now()const{return getStr(0);}
-        std::optional<char> first()const{return getStr(1);}
-        std::optional<char> second()const{return getStr(2);}
-        std::optional<char> third()const{return getStr(3);}
-        void consume(){
-            if(idx==_str.size())[[unlikely]]{
-                throw std::logic_error("the Code cannot to be consume!");
-            }
-            idx++;
-        }
-        bool isEnd(){
-            return idx==_str.size();
-        }
-    };
-
-    template<class T>
-    concept Numeric = std::integral<T> || std::floating_point<T>;
-
-    template<class T>
-    class INodeData{
-    public:
-        T data;
-        virtual~INodeData()=default;
-    };
-
-    class Node{
-    public:
-        virtual~Node()=default;
-    };
-
-    template<Numeric T>
-    class NumberNode:public Node,public INodeData<T>{
-    public:
-        NumberNode(T&t):data(t){
-
-        }
-        T data;
-        virtual~NumberNode()=default;
-    };
-    
-    template<class T>
-    bool isItsType(const Code&code)=delete;
-
-    bool inline isIntChar(const char c)noexcept{
-        return '0'<=c&&c<='9';
-    }
-    template<>
-    bool inline isItsType<NumberNode<int>>(const Code&code){
-        if(isIntChar(code.now().value())){
-            if(code.now().value()=='0'){
-                if(isIntChar(code.first().value())){
-                    return false;
-                }else{
-                    return true;
-                }
-            }else{
-                return true;
-            }
-        }else{
-            return false;
-        }
-    }
-
-
-    template<class T>
-    inline T parse(Code&code)=delete;
-
-    template<>
-    inline NumberNode<int> parse(Code&code){
-        int v=0;
-        while(code.now().has_value()&&isIntChar(code.now().value())){
-            v=v*10+(code.now().value()-'0');
-            code.consume();
-        }
-        return NumberNode<int>(v);
-    }
-
-    class Parser{
-        Code code;
-    public:
-        Parser(const std::string &code):code({._str=code}){
-            
-        }
-        void advance(){
-            while(!code.isEnd()){
-                if(code.now().value()==';'){
-                    return;
-                }
-                if(code.now().value()==' '){
-                    code.consume();
-                }else if(isItsType<NumberNode<int>>(code)){
-                    std::cout<<parse<NumberNode<int>>(code).data<<'\n';
-                }else[[unlikely]]{
-                    throw std::logic_error("cannot parse the code");
-                }
-            }
-        }
-    };
-}

src/main.cpp

@@ -1,8 +1,5 @@
-#include <string>
-#include <Parser.hpp>
+#include "Lexer.hpp"
 
 int main(){
-    std::string s = "1 2  3 ; ;  ; ;";
-    ztl::Parser parser(s);
-    parser.advance();
+    
 }