[a8555c5] | 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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