tests/gtest-lambda-01.cs

   1
   2 //
   3 // Lambda expression test, basics.
   4 //
   5 using System;
   6
   7 delegate int IntFunc (int x);
   8 delegate void VoidFunc (int x);
   9
  10 class X {
  11
  12         static IntFunc func, increment;
  13         static VoidFunc nothing;
  14
  15         static int Main ()
  16         {
  17                 int y = 0;
  18                 int r;
  19
  20                 //
  21                 // The following tests body-style lambda
  22                 //
  23                 increment = (int x) => { return x + 1; };
  24                 r = increment (4);
  25                 Console.WriteLine ("Should be 5={0}", r);
  26                 if (r != 5)
  27                         return 1;
  28
  29                 //
  30                 // This tests the body of a lambda being an expression
  31                 //
  32                 func = (int x) => x + 1;
  33                 r = func (10);
  34                 Console.WriteLine ("Should be 11={0}", r);
  35                 if (r != 11)
  36                         return 2;
  37
  38                 //
  39                 // The following tests that the body is a statement
  40                 //
  41                 nothing = (int x) => { y = x; };
  42                 nothing (10);
  43                 Console.WriteLine ("Should be 10={0}", y);
  44                 if (y != 10)
  45                         return 3;
  46
  47                 nothing = (int x) => { new X (x); };
  48                 nothing (314);
  49                 if (instantiated_value != 314)
  50                         return 4;
  51
  52                 Console.WriteLine ("All tests pass");
  53                 return 0;
  54         }
  55
  56         static int instantiated_value;
  57
  58         X (int v)
  59         {
  60                 instantiated_value = v;
  61         }
  62 }