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  1. module runnable;
  2. import std.stdio;
  3.  
  4. bool deeplyEqual(T)(auto ref T value1, auto ref T value2)
  5. {
  6.     static if (is(T==struct) || is(T==class))
  7.     {
  8.         foreach(member; __traits(allMembers, T))
  9.         {
  10.             enum getMember1 = "__traits(getMember, value1, member)";
  11.             enum getMember2 = "__traits(getMember, value2, member)";
  12.             alias MT = typeof(mixin(getMember1));
  13.             static if (is(MT==struct) || is(MT==class) && MT.tupleof.length)
  14.             {
  15.                 if (!deeplyEqual(mixin(getMember1), mixin(getMember2)))
  16.                     return false;
  17.             }
  18.             else if (mixin(getMember1) != mixin(getMember2))
  19.                 return false;
  20.         }
  21.         return true;
  22.     }
  23.     else return value1 == value2;
  24. }
  25.  
  26. struct Foo{uint a; int b;}
  27. struct Bar{float c = 0; Foo foo;}
  28.  
  29. void main()
  30. {
  31.     Bar x, y;
  32.     writeln(deeplyEqual(x, y));
  33.     x.foo.b = 8;
  34.     writeln(deeplyEqual(x, y));
  35. }
Success #stdin #stdout 0s 2676KB
comments (?)
stdin
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Standard input is empty
stdout
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true
false
https://ideone.com/handc5
language:
D (dmd 2.085.0)
created:
8 years ago
visibility:
public

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