Changeset 1cdfa82 for src/tests/references.c

Timestamp:

Apr 25, 2018, 4:55:53 PM (4 years ago)

Author:

Aaron Moss <a3moss@…>

Branches:

new-env, with_gc

Children:

42107b4

Parents:

2efe4b8 (diff), 9d5fb67 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge remote-tracking branch 'origin/master' into with_gc

File:

• src/tests/references.c (modified) (4 diffs)

src/tests/references.c

@@ -46 +46 @@
 
 int main() {
-        int x = 123456, *p1 = &x, **p2 = &p1, ***p3 = &p2,
+        int x = 123456, x2 = 789, *p1 = &x, **p2 = &p1, ***p3 = &p2,
                 &r1 = x,    &&r2 = r1,   &&&r3 = r2;
         ***p3 = 3;                          // change x
@@ -52 +52 @@
         *p3 = &p1;                          // change p2
         int y = 0, z = 11, & ar[3] = { x, y, z };    // initialize array of references
+        // &ar[1] = &z;                        // change reference array element
+        // typeof( ar[1] ) p;                  // is int, i.e., the type of referenced object
+        // typeof( &ar[1] ) q;                 // is int &, i.e., the type of reference
+        // sizeof( ar[1] ) == sizeof( int );   // is true, i.e., the size of referenced object
+        // sizeof( &ar[1] ) == sizeof( int *); // is true, i.e., the size of a reference
 
+        ((int*&)&r3) = &x;                  // change r1, (&*)**r3
+        x = 3;
         // test that basic reference properties are true - r1 should be an alias for x
         printf("%d %d %d\n", x, r1, &x == &r1);
@@ -68 +75 @@
         printf("%d %d\n", r1, x);
 
+        r3 = 6;                               // change x, ***r3
+        printf("x = %d ; x2 = %d\n", x, x2);  // check that x was changed
+        &r3 = &x2;                            // change r1 to refer to x2, (&*)**r3
+        r3 = 999;                             // modify x2
+        printf("x = %d ; x2 = %d\n", x, x2);  // check that x2 was changed
+        ((int**&)&&r3) = p2;                  // change r2, (&(&*)*)*r3, ensure explicit cast to reference works
+        r3 = 12345;                           // modify x
+        printf("x = %d ; x2 = %d\n", x, x2);  // check that x was changed
+        &&&r3 = p3;                           // change r3 to p3, (&(&(&*)*)*)r3
+        ((int&)r3) = 22222;                   // modify x, ensure explicit cast to reference works
+        printf("x = %d ; x2 = %d\n", x, x2);  // check that x was changed
+
         // test that reference members are not implicitly constructed/destructed/assigned
         X x1, x2 = x1;
@@ -76 +95 @@
         &z1.r = &z1r;
         &z2.r = &z2r;
+
         z1 = z2;
+
+        // test rvalue-to-reference conversion
+        {
+                struct S { double x, y; };
+                void f( int & i, int & j, S & s, int v[] ) {
+                        printf("%d %d { %g, %g }, [%d, %d, %d]\n", i, j, s.[x, y], v[0], v[1], v[2]);
+                }
+                void g(int & i) { printf("%d\n", i); }
+                void h(int &&& i) { printf("%d\n", i); }
+
+                int &&& r = 3;  // rvalue to reference
+                int i = r;
+                printf("%d %d\n", i, r);  // both 3
+
+                g( 3 );          // rvalue to reference
+                h( (int &&&)3 ); // rvalue to reference
+
+                int a = 5, b = 4;
+                f( 3, a + b, (S){ 1.0, 7.0 }, (int [3]){ 1, 2, 3 } ); // two rvalue to reference
+        }
 }