| 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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