source: tests/references.cfa @ dc8511c

aaron-thesisarm-ehcleanup-dtorsdeferred_resnjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprno_listpersistent-indexer
Last change on this file since dc8511c was dc8511c, checked in by Peter A. Buhr <pabuhr@…>, 3 years ago

first attempt at updating suffixes for test programs

  • Property mode set to 100644
File size: 4.2 KB
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1//
2// Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo
3//
4// The contents of this file are covered under the licence agreement in the
5// file "LICENCE" distributed with Cforall.
6//
7// references.c --
8//
9// Author           : Rob Schluntz
10// Created On       : Wed Aug 23 16:11:50 2017
11// Last Modified By : Rob Schluntz
12// Last Modified On : Wed Aug 23 16:12:03
13// Update Count     : 2
14//
15
16struct Y { int i; };
17void ?{}(Y & y) { printf("Default constructing a Y\n"); }
18void ?{}(Y & y, Y other) { printf("Copy constructing a Y\n"); }
19void ^?{}(Y & y) { printf("Destructing a Y\n"); }
20Y ?=?(Y & y, Y other) { printf("Assigning a Y\n"); return y; }
21void ?{}(Y & y, int i) { printf("Value constructing a Y %d\n", i); y.i = i; }
22
23struct X { Y & r; Y y; };
24void ?{}(X & x) {
25        // ensure that r is not implicitly constructed
26}
27void ?{}(X & x, X other) {
28        // ensure that r is not implicitly constructed
29}
30void ^?{}(X & x) {
31        // ensure that r is not implicitly destructed
32}
33X ?=?(X & x, X other) { return x; }
34
35// ensure that generated functions do not implicitly operate on references
36struct Z { Y & r; Y y; };
37
38// test user-defined reference-returning function
39int & toref( int * p ) { return *p; }
40// test user-defined reference-parameter function
41int * toptr( int & r ) { return &r; }
42
43void changeRef( int & r ) {
44        r++;
45}
46
47int main() {
48        int x = 123456, x2 = 789, *p1 = &x, **p2 = &p1, ***p3 = &p2,
49                &r1 = x,    &&r2 = r1,   &&&r3 = r2;
50        ***p3 = 3;                          // change x
51        **p3 = &x;                          // change p1
52        *p3 = &p1;                          // change p2
53        int y = 0, z = 11, & ar[3] = { x, y, z };    // initialize array of references
54        // &ar[1] = &z;                        // change reference array element
55        // typeof( ar[1] ) p = 3;              // is int, i.e., the type of referenced object
56        // typeof( &ar[1] ) q = &x;            // is int *, i.e., the type of pointer
57        // _Static_assert( sizeof( ar[1] ) == sizeof( int ), "Array type should be int." );   // is true, i.e., the size of referenced object
58        // _Static_assert( sizeof( &ar[1] ) == sizeof( int *), "Address of array should be int *." ); // is true, i.e., the size of a reference
59
60        ((int*&)&r3) = &x;                  // change r1, (&*)**r3
61        x = 3;
62        // test that basic reference properties are true - r1 should be an alias for x
63        printf("%d %d %d\n", x, r1, &x == &r1);
64        r1 = 12;
65        printf("%d %d %d\n", x, r1, &x == &r1);
66
67        // test that functions using basic references work
68        printf("%d %d %d %d\n", toref(&x), toref(p1), toptr(r1) == toptr(x), toptr(r1) == &x);
69
70        changeRef( x );
71        changeRef( y );
72        changeRef( z );
73        printf("%d %d %d\n", x, y, z);
74        changeRef( r1 );
75        printf("%d %d\n", r1, x);
76
77        r3 = 6;                               // change x, ***r3
78        printf("x = %d ; x2 = %d\n", x, x2);  // check that x was changed
79        &r3 = &x2;                            // change r1 to refer to x2, (&*)**r3
80        r3 = 999;                             // modify x2
81        printf("x = %d ; x2 = %d\n", x, x2);  // check that x2 was changed
82        ((int**&)&&r3) = p2;                  // change r2, (&(&*)*)*r3, ensure explicit cast to reference works
83        r3 = 12345;                           // modify x
84        printf("x = %d ; x2 = %d\n", x, x2);  // check that x was changed
85        &&&r3 = p3;                           // change r3 to p3, (&(&(&*)*)*)r3
86        ((int&)r3) = 22222;                   // modify x, ensure explicit cast to reference works
87        printf("x = %d ; x2 = %d\n", x, x2);  // check that x was changed
88
89        // test that reference members are not implicitly constructed/destructed/assigned
90        X x1, x2 = x1;
91        x1 = x2;
92
93        Z z1, z2 = z1;
94        Y z1r = 56, z2r = 78;
95        &z1.r = &z1r;
96        &z2.r = &z2r;
97
98        z1 = z2;
99
100        // test rvalue-to-reference conversion
101        {
102                struct S { double x, y; };
103                void f( int & i, int & j, S & s, int v[] ) {
104                        printf("%d %d { %g, %g }, [%d, %d, %d]\n", i, j, s.[x, y], v[0], v[1], v[2]);
105                }
106                void g(int & i) { printf("%d\n", i); }
107                void h(int &&& i) { printf("%d\n", i); }
108
109                int &&& r = 3;  // rvalue to reference
110                int i = r;
111                printf("%d %d\n", i, r);  // both 3
112
113                g( 3 );          // rvalue to reference
114                h( (int &&&)3 ); // rvalue to reference
115
116                int a = 5, b = 4;
117                f( 3, a + b, (S){ 1.0, 7.0 }, (int [3]){ 1, 2, 3 } ); // two rvalue to reference
118        }
119}
120
121// Local Variables: //
122// tab-width: 4 //
123// End: //
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