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annotate tests/mini/funcptr.d @ 341:1bb99290e03a trunk

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[svn r362] Started merging the old 'test' dir as well as the newer 'tangotests' dir into 'tests/mini' and 'tests/minicomplex'.
author lindquist
date Sun, 13 Jul 2008 02:51:19 +0200
parents test/funcptr.d@d9d5d59873d8
children
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d9d5d59873d8 [svn r291] Fixed a bunch of the old Phobos tests to work with Tango.
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1 extern(C) int printf(char*, ...);
d9d5d59873d8 [svn r291] Fixed a bunch of the old Phobos tests to work with Tango.
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2
1
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3 int return_six()
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4 {
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5 return 6;
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6 }
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7
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8 int add_int(int a, int b)
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9 {
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10 return a+b;
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11 }
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12
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13 int sub_int(int a, int b)
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14 {
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15 return a-b;
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16 }
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17
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18 alias int function(int,int) binfn_t;
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19
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20 int binop_int(binfn_t op, int a, int b)
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21 {
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22 return op(a,b);
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23 }
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24
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25 binfn_t get_binop_int(char op)
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26 {
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27 binfn_t fn;
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28 if (op == '+')
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29 fn = &add_int;
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30 else if (op == '-')
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31 fn = &sub_int;
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32 return fn;
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33 }
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34
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35 extern(C) float mul_float(float a, float b)
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36 {
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37 return a * b;
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38 }
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39
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40 void function_pointers()
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41 {
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42 int function() fn = &return_six;
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43 assert(fn() == 6);
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44
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45 binfn_t binfn = &add_int;
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46 assert(binfn(4,1045) == 1049);
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47
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48 assert(binop_int(binfn, 10,656) == 666);
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49
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50 binfn = get_binop_int('+');
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51 assert(binop_int(binfn, 10,100) == 110);
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52 binfn = get_binop_int('-');
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53 assert(binop_int(binfn, 10,100) == -90);
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55 {
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56 auto ffn = &mul_float;
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57 float ftmp = mul_float(2.5,5);
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58 assert(ftmp == 12.5);
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59 assert(ftmp > 12.49 && ftmp < 12.51);
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60 }
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61 }
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62
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63 void main()
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64 {
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65 printf("Function pointer test\n");
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66 function_pointers();
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67 printf(" SUCCESS\n");
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68 }