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  1.  
  2. #include <iostream>
  3. #include <typeinfo>
  4. #include <string>
  5. #include <cxxabi.h>
  6.  
  7. using namespace std;
  8.  
  9. string demangle(const char* mangledName) {
  10. 	int status;
  11. 	char* result = abi::__cxa_demangle(mangledName, NULL, NULL, &status);
  12. 	switch(status) {
  13. 	case -1:
  14. 		cerr << "Out of memory!" << endl;
  15. 		exit(1);
  16. 	case -2:
  17. 		return mangledName;
  18. 	case -3: // Should never happen, but just in case?
  19. 		return mangledName;
  20. 	}
  21. 	string name = result;
  22. 	free(result);
  23. 	return name;
  24. }
  25.  
  26. template<typename T> struct preserve_qualifiers {};
  27.  
  28. template<typename T> class typeinfo {
  29. 	typedef preserve_qualifiers<T> wrap;
  30. public:
  31. 	static const string name() {
  32. 		string name = demangle(typeid(wrap).name());
  33. 		int i = name.find_first_of('<');
  34. 		if(i == string::npos) return name;
  35. 		int j = name.length() - i - 2;
  36. 		return name.substr(i + 1, j);
  37. 	}
  38. };
  39.  
  40. #define TypeOut(...) cout \
  41. 	<< "Type " #__VA_ARGS__ ": " << endl \
  42. 	<< "  Mangled: " << typeid(__VA_ARGS__).name() << endl \
  43. 	<< "  Demangled: " << demangle(typeid(__VA_ARGS__).name()) << endl \
  44. 	<< "  typeinfo<>: " << typeinfo<__VA_ARGS__>::name() << endl
  45. class A {};
  46. template<typename T> class F {};
  47. template<int T> class G {};
  48. template<template<typename> class T> class H {};
  49. template<template<int> class T> class I {};
  50. template<typename... T> class J {};
  51. template<int... T> class K {};
  52. template<template<typename> class... T> class L {};
  53. template<template<int> class... T> class M {};
  54. template<template<typename> class... T> class N {};
  55. template<template<template<typename> class...> class... T> class O {};
  56. struct bits {int i : 4, j : 2;};
  57. template<typename T, int n> struct bits2 {T val : n;};
  58.  
  59. int main(int argc, char* argv[]) {
  60. 	TypeOut(void(*volatile)(void(*const)()));
  61. 	TypeOut(int (A::*)());
  62. 	TypeOut(int (A::*)()const);
  63. 	TypeOut(int (A::*const)());
  64. 	TypeOut(F<int>);
  65. 	TypeOut(G<3>);
  66. 	TypeOut(H<F>);
  67. 	TypeOut(I<G>);
  68. 	TypeOut(J<int>);
  69. 	TypeOut(K<3>);
  70. 	TypeOut(L<F>);
  71. 	TypeOut(M<G>);
  72. 	TypeOut(N<F,F,F>);
  73. 	TypeOut(O<N,N>);
  74. }
Success #stdin #stdout 0s 3072KB
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stdin
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Standard input is empty
stdout
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Type void(*volatile)(void(*const)()): 
  Mangled: PFvPFvvEE
  Demangled: void (*)(void (*)())
  typeinfo<>: void (* volatile)(void (*)())
Type int (A::*)(): 
  Mangled: M1AFivE
  Demangled: int (A::*)()
  typeinfo<>: int (A::*)()
Type int (A::*)()const: 
  Mangled: M1AKFivE
  Demangled: int (A::*)() const
  typeinfo<>: int (A::*)() const
Type int (A::*const)(): 
  Mangled: M1AFivE
  Demangled: int (A::*)()
  typeinfo<>: int (A::* const)()
Type F<int>: 
  Mangled: 1FIiE
  Demangled: F<int>
  typeinfo<>: F<int> 
Type G<3>: 
  Mangled: 1GILi3EE
  Demangled: G<3>
  typeinfo<>: G<3> 
Type H<F>: 
  Mangled: 1HI1FE
  Demangled: H<F>
  typeinfo<>: H<F> 
Type I<G>: 
  Mangled: 1II1GE
  Demangled: I<G>
  typeinfo<>: I<G> 
Type J<int>: 
  Mangled: 1JIIiEE
  Demangled: J<int>
  typeinfo<>: J<int> 
Type K<3>: 
  Mangled: 1KIILi3EEE
  Demangled: K<3>
  typeinfo<>: K<3> 
Type L<F>: 
  Mangled: 1LII1FEE
  Demangled: L<F>
  typeinfo<>: L<F> 
Type M<G>: 
  Mangled: 1MII1GEE
  Demangled: M<G>
  typeinfo<>: M<G> 
Type N<F,F,F>: 
  Mangled: 1NII1FS0_S0_EE
  Demangled: N<F, F, F>
  typeinfo<>: N<F, F, F> 
Type O<N,N>: 
  Mangled: 1OII1NS0_EE
  Demangled: O<N, N>
  typeinfo<>: O<N, N>
https://ideone.com/05yxL
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
secret

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