1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // references.c -- |
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8 | // |
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9 | // Author : Rob Schluntz |
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10 | // Created On : Wed Aug 23 16:11:50 2017 |
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11 | // Last Modified By : Rob Schluntz |
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12 | // Last Modified On : Wed Aug 23 16:12:03 |
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13 | // Update Count : 2 |
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14 | // |
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15 | |
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16 | struct Y { int i; }; |
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17 | void ?{}(Y & y) { printf("Default constructing a Y\n"); } |
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18 | void ?{}(Y & y, Y other) { printf("Copy constructing a Y\n"); } |
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19 | void ^?{}(Y & y) { printf("Destructing a Y\n"); } |
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20 | Y ?=?(Y & y, Y other) { printf("Assigning a Y\n"); return y; } |
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21 | |
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22 | struct X { Y & r; Y y; }; |
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23 | void ?{}(X & x) { |
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24 | // ensure that r is not implicitly constructed |
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25 | } |
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26 | void ?{}(X & x, X other) { |
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27 | // ensure that r is not implicitly constructed |
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28 | } |
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29 | void ^?{}(X & x) { |
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30 | // ensure that r is not implicitly destructed |
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31 | } |
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32 | X ?=?(X & x, X other) { return x; } |
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33 | |
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34 | // test user-defined reference-returning function |
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35 | int & toref( int * p ) { return *p; } |
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36 | // test user-defined reference-parameter function |
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37 | int * toptr( int & r ) { return &r; } |
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38 | |
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39 | int main() { |
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40 | int x = 123456, *p1 = &x, **p2 = &p1, ***p3 = &p2, |
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41 | &r1 = x, &&r2 = r1, &&&r3 = r2; |
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42 | ***p3 = 3; // change x |
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43 | **p3 = &x; // change p1 |
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44 | *p3 = &p1; // change p2 |
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45 | int y, z, & ar[3] = { x, y, z }; // initialize array of references |
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46 | |
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47 | // test that basic reference properties are true - r1 should be an alias for x |
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48 | printf("%d %d %d\n", x, r1, &x == &r1); |
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49 | r1 = 12; |
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50 | printf("%d %d %d\n", x, r1, &x == &r1); |
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51 | |
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52 | // test that functions using basic references work |
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53 | printf("%d %d %d %d\n", toref(&x), toref(p1), toptr(r1) == toptr(x), toptr(r1) == &x); |
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54 | |
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55 | // test that reference members are not implicitly constructed/destructed/assigned |
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56 | X x1, x2 = x1; |
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57 | x1 = x2; |
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58 | } |
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59 | |
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60 | // Local Variables: // |
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61 | // tab-width: 4 // |
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62 | // End: // |
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63 | |
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