fork(1) download
copy 
  1. #include <iomanip>
  2. #include <iostream>
  3. #include <string>
  4. #include <vector>
  5.  
  6. using namespace std;
  7.  
  8. class Grammar;
  9.  
  10. class CristallParser{
  11.  
  12. 	std::vector <Grammar *> Operations;
  13. 	std::string &T;
  14. public:
  15. 	CristallParser(std::string &Text);
  16. 	void parse();
  17. };
  18.  
  19. class Grammar{
  20. public:
  21. 	std::string Label;
  22. 	virtual bool isRule(std::string& Text) = 0;
  23. 	virtual void parse(std::string& Text) = 0;
  24. };
  25.  
  26.  
  27.  
  28. class NumbersGrammar: public Grammar{
  29. 	int Limit = 0;
  30. public:
  31. 	NumbersGrammar(std::string Label, int Limit);
  32. 	bool isRule(std::string &Text);
  33. 	void parse(std::string &Text);
  34. };
  35.  
  36. class SingleGrammar : public Grammar
  37. {
  38. 	std::string Text;
  39. public:
  40. 	SingleGrammar(std::string Label, std::string Char);
  41. 	bool isRule(std::string &Text);
  42. 	void parse(std::string &Text);
  43. };
  44.  
  45. CristallParser::CristallParser(std::string &Text): T(Text){
  46. 	Operations.push_back(new NumbersGrammar("Number",0));
  47. 	Operations.push_back(new SingleGrammar("Text","test"));
  48. 	T = Text;
  49. }
  50.  
  51. void CristallParser::parse(){
  52. 	while (T.size()>0){
  53. 		for (auto El: Operations){
  54. 			if(El->isRule(T))
  55. 				El->parse(T);
  56. 		}
  57. 		T.erase(0,1);
  58. 	}
  59. }
  60.  
  61. NumbersGrammar::NumbersGrammar(std::string Label, int Limit = 0)
  62. {
  63. 	this->Label = Label;
  64. 	if (Limit != 0)
  65. 	this->Limit = 0;
  66. }
  67.  
  68. bool NumbersGrammar::isRule(std::string& Text){
  69.  
  70. 	return (isdigit(Text[0]) == true || Text[0] == '-' );
  71. }
  72.  
  73. void NumbersGrammar::parse(std::string& Text){
  74. 	std::cout<<Text<<std::endl;
  75. 	int Element = 0;
  76. 	for (char Char:Text){
  77. 		if (isdigit(Char) || Char == '-')
  78. 			Element++;
  79. 		else
  80. 			break;
  81. 	}
  82. 	if (Limit == Element || (Limit == 0)){
  83. 		std::cout<<Text.substr(0,Element);
  84. 		Text = Text.erase(0,Element);
  85. 	}
  86. }
  87.  
  88. SingleGrammar::SingleGrammar(std::string Label, std::string Char)
  89. {
  90. 	this->Label = Label;
  91. 	Text = Char;
  92. }
  93.  
  94. bool SingleGrammar::isRule(std::string &Text)
  95. {
  96. 	return (Text.substr(0, this-> Text.length()) == Text );
  97. }
  98.  
  99. void SingleGrammar::parse(std::string &Text)
  100. {
  101. 	std::cout<<Text<<std::endl;
  102. 	std::cout<<"Wykryto teskt";
  103. 	Text.erase(0, this->Text.length());
  104. }
  105.  
  106. #define DBG(x) { cout << left << setw(30) << #x << (x) << endl; }
  107.  
  108. int main()
  109. {
  110. 	string s = "12345dupatestdupa223";
  111.  
  112. 	DBG(s);
  113.  
  114. 	CristallParser c(s);
  115.  
  116. 	c.parse();
  117.  
  118. 	cout << endl << endl;
  119.  
  120. 	DBG(s);
  121.  
  122. }
  123.  
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
s                             12345dupatestdupa223
12345dupatestdupa223
12345a223
Wykryto teskt

s
https://ideone.com/3ihfcI
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!