[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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[12536d3] | 21 | void ?{}(Y & y, int i) { printf("Value constructing a Y %d\n", i); y.i = i; } |
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[a8555c5] | 22 | |
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| 23 | struct X { Y & r; Y y; }; |
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| 24 | void ?{}(X & x) { |
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| 25 | // ensure that r is not implicitly constructed |
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| 26 | } |
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| 27 | void ?{}(X & x, X other) { |
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| 28 | // ensure that r is not implicitly constructed |
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| 29 | } |
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| 30 | void ^?{}(X & x) { |
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| 31 | // ensure that r is not implicitly destructed |
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| 32 | } |
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| 33 | X ?=?(X & x, X other) { return x; } |
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| 34 | |
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[12536d3] | 35 | // ensure that generated functions do not implicitly operate on references |
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| 36 | struct Z { Y & r; Y y; }; |
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| 37 | |
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[a8555c5] | 38 | // test user-defined reference-returning function |
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| 39 | int & toref( int * p ) { return *p; } |
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| 40 | // test user-defined reference-parameter function |
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| 41 | int * toptr( int & r ) { return &r; } |
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| 42 | |
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[b05a4eb] | 43 | void changeRef( int & r ) { |
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| 44 | r++; |
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| 45 | } |
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| 46 | |
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[a8555c5] | 47 | int main() { |
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| 48 | int x = 123456, *p1 = &x, **p2 = &p1, ***p3 = &p2, |
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| 49 | &r1 = x, &&r2 = r1, &&&r3 = r2; |
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| 50 | ***p3 = 3; // change x |
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[0415e24] | 51 | // ((int&)r3 = 3; // change x, ***r3 |
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[a8555c5] | 52 | **p3 = &x; // change p1 |
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[0415e24] | 53 | // ((int*&)&r3) = &x; // change r1, (&*)**r3 |
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[a8555c5] | 54 | *p3 = &p1; // change p2 |
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[0415e24] | 55 | // ((int**&)&&r3) = &p2; // change r2, (&(&*)*)*r3 |
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| 56 | // ((int***&)&&&r3) = p3; // change r3 to p3, (&(&(&*)*)*)r3 |
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[b05a4eb] | 57 | int y = 0, z = 11, & ar[3] = { x, y, z }; // initialize array of references |
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[0415e24] | 58 | // &ar[1] = &z; // change reference array element |
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| 59 | // typeof( ar[1] ) p; // is int, i.e., the type of referenced object |
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| 60 | // typeof( &ar[1] ) q; // is int &, i.e., the type of reference |
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| 61 | // sizeof( ar[1] ) == sizeof( int ); // is true, i.e., the size of referenced object |
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| 62 | // sizeof( &ar[1] ) == sizeof( int *); // is true, i.e., the size of a reference |
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[a8555c5] | 63 | |
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| 64 | // test that basic reference properties are true - r1 should be an alias for x |
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| 65 | printf("%d %d %d\n", x, r1, &x == &r1); |
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| 66 | r1 = 12; |
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| 67 | printf("%d %d %d\n", x, r1, &x == &r1); |
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| 68 | |
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| 69 | // test that functions using basic references work |
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| 70 | printf("%d %d %d %d\n", toref(&x), toref(p1), toptr(r1) == toptr(x), toptr(r1) == &x); |
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| 71 | |
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[b05a4eb] | 72 | changeRef( x ); |
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| 73 | changeRef( y ); |
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| 74 | changeRef( z ); |
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| 75 | printf("%d %d %d\n", x, y, z); |
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| 76 | changeRef( r1 ); |
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| 77 | printf("%d %d\n", r1, x); |
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| 78 | |
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[a8555c5] | 79 | // test that reference members are not implicitly constructed/destructed/assigned |
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| 80 | X x1, x2 = x1; |
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| 81 | x1 = x2; |
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[12536d3] | 82 | |
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| 83 | Z z1, z2 = z1; |
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| 84 | Y z1r = 56, z2r = 78; |
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| 85 | &z1.r = &z1r; |
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| 86 | &z2.r = &z2r; |
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[0415e24] | 87 | |
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[12536d3] | 88 | z1 = z2; |
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[a8555c5] | 89 | } |
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| 90 | |
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| 91 | // Local Variables: // |
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| 92 | // tab-width: 4 // |
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| 93 | // End: // |
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| 94 | |
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