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  1. #include <iostream>
  2. #include <fstream>
  3.  
  4. class IndentClass {
  5.     public:
  6.         IndentClass();
  7.         ~IndentClass();
  8.  
  9.     private:
  10.         std::string IndentText;
  11.         int _Indent;
  12.  
  13.     public:
  14.         inline void SetIndentText(const char* Text);
  15.         inline void Indent(int Amount);
  16.         inline void SetIndent(int Amount);
  17.  
  18.         inline void ind (std::ostream& ofs);
  19.  
  20.         class Ind_t {
  21.             public:
  22.                 IndentClass& state;
  23.                 Ind_t (IndentClass& _state) : state(_state) {}
  24.                 friend inline std::ostream& operator<< (std::ostream& ofs, Ind_t& ind);
  25.         };
  26.         class IndS_t {
  27.             public:
  28.                 IndentClass& state;
  29.                 IndS_t (IndentClass& _state) : state(_state) {}
  30.                 friend inline std::ostream& operator<< (std::ostream& ofs, IndS_t& ind);
  31.         };
  32.         class IndE_t {
  33.             public:
  34.                 IndentClass& state;
  35.                 IndE_t (IndentClass& _state) : state(_state) {}
  36.                 friend inline std::ostream& operator<< (std::ostream& ofs, IndE_t& ind);
  37.         };
  38.         Ind_t Ind;
  39.         IndS_t IndS;
  40.         IndE_t IndE;
  41. };
  42.  
  43. IndentClass::IndentClass () : IndentText("    "), _Indent(0), Ind(*this), IndS(*this), IndE(*this) {
  44.  
  45. }
  46.  
  47. IndentClass::~IndentClass () {
  48. }
  49.  
  50. void IndentClass::SetIndentText (const char* Text) {
  51.     IndentText = Text;
  52. }
  53.  
  54. void IndentClass::Indent (int Amount) {
  55.     _Indent += Amount;
  56. }
  57.  
  58. void IndentClass::SetIndent(int Amount) {
  59.     _Indent = Amount;
  60. }
  61.  
  62. void IndentClass::ind (std::ostream& ofs) {
  63.     for (int i = 0;i < _Indent;i++) {
  64.         ofs << IndentText;
  65.     }
  66. }
  67.  
  68. std::ostream& operator<< (std::ostream& ofs, IndentClass::Ind_t& ind) {
  69.     ind.state.ind(ofs);
  70.     return ofs;
  71. }
  72.  
  73. std::ostream& operator<< (std::ostream& ofs, IndentClass::IndS_t& inds) {
  74.     inds.state.ind(ofs);
  75.     inds.state.Indent(1);
  76.     return ofs;
  77. }
  78.  
  79. std::ostream& operator<< (std::ostream& ofs, IndentClass::IndE_t& inde) {
  80.     inde.state.Indent(-1);
  81.     inde.state.ind(ofs);
  82.     return ofs;
  83. }
  84.  
  85. int main () {
  86.     IndentClass i;
  87.  
  88.     std::cout << i.IndS << "test" << std::endl;
  89.     std::cout << i.Ind << "test" << std::endl;
  90.     std::cout << i.IndE << "test" << std::endl;
  91.  
  92.     return 0;
  93. }
  94.  
Success #stdin #stdout 0s 3428KB
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Standard input is empty
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test
    test
test
https://ideone.com/6Xcl2c
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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