| 1 | int fred() {
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| 2 |     // initialize basic structure
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| 3 |     struct S {
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| 4 |         int i, j, k;
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| 5 |     };
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| 6 |     void ?{}( S *s ) { s->i = 1, s->k = 2; }            // default constructor
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| 7 |     void ?{}( S *s, int i, int k ) { s->i = i, s->k = k; } // 2 parameter constructor
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| 8 |     void ?{}( S *s, S c ) { *s = c; }                   // copy constructor
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| 9 |     void ^?{}( S *s ) { s->i = 0, s->k = 0; }           // default destructor
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| 10 |     void ^?{}( S *s, int i ) { s->i = i, s->k = i; }    // 1 parameter destructor
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| 11 |     {
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| 12 |         S s1;                   // default constructor
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| 13 |         S s2 = { 3, 7 };        // 2 parameter constructor
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| 14 |         S s3 @= { .k:3, .i:7 }; // 2 parameter C initialization
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| 15 |         ?{}( &s3, 2, 5 );       // explicit 2 parameter constructor
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| 16 |         ^?{}( &s1 );            // explicit call to default destructor
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| 17 |     } // implicit call to default destructor for s2, explicit call s1, no call for s3
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| 18 |     S s4 @= {};                 // no default construction
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| 19 |     (&s4){ 2, 5 };              // explicit 2 parameter constructor
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| 20 |     ^s4{ 3 };                   // explicit call to 1 parameter destructor
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| 21 | 
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| 22 |     // initialize pointer to a basic structure
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| 23 | 
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| 24 |     void ?{}( S **s ) { *s = malloc(); (*s)->i = 1, (*s)->k = 2; } // default constructor
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| 25 |     void ?{}( S **s, int i, int k ) { *s = malloc(); (*s)->i = i, (*s)->k = k; } // 2 parameter constructor
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| 26 |     void ^?{}( S **s ) { (*s)->i = 0, (*s)->k = 0; free( *s ); *s = 0; } // default destructor
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| 27 |     {
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| 28 |         S *ps1;                 // default constructor
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| 29 |         S *ps2 = { 3, 7 };      // 2 parameter constructor
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| 30 |         S *ps3 @= 0;            // C initialization
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| 31 |         S *ps4 @= {};           // no default construction
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| 32 |     } // implicit call to default destructor for ps2 and ps1, checks ordering of explicit destructor calls
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| 33 | 
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| 34 |     ?{}( &ps3, 2, 5 );          // explicit 2 parameter constructor
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| 35 |     (&ps4){ 2, 5 };             // explicit 2 parameter constructor
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| 36 |     
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| 37 |     ^?{}( &ps3 );               // explicit call to default destructor
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| 38 |     ^ps4{};                     // explicit call to default destructor
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| 39 | 
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| 40 |     // initialize complex structure
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| 41 | 
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| 42 |     struct T {
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| 43 |         struct S s;
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| 44 |     };
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| 45 | 
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| 46 |     void ?{}( T *t ) {}                                 // default constructor => implicitly call constructor for field s
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| 47 |     void ?{}( T *t, int i, int k ) { (&t->s){ i, k }; } // 2 parameter constructor => explicitly call constructor for field s
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| 48 |     void ?{}( T *t, S c ) { (&t->s){ c }; }             // 1 parameter constructor => explicitly call copy constructor for field s
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| 49 |     void ^?{}( T *s, int i ) {}                         // destructor => implicitly call destructor for field s
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| 50 |     {
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| 51 |         S s;                    // default constructor
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| 52 |         T t1;                   // default constructor
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| 53 |         T t2 = { s };           // 1 parameter constructor
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| 54 |         ^?{}( &t1 );            // explicit call to default destructor => implicit call to t1.s's destructor
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| 55 |     } // implicit call to default destructor for t2 and implicit call for s;
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| 56 |     T t3;                       // default constructor
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| 57 |     T t4 @= { { 1, 3 } };       // C initialization
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| 58 |     (&t4){ 2, 5 };              // explicit 2 parameter constructor
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| 59 | 
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| 60 |     T *pt = malloc(){ 3, 4 };   // common usage
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| 61 | } // implicit call to default destructor for t3
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