[0ec9229] | 1 | // New draft of exception tests. |
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| 2 | |
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| 3 | |
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| 4 | #include <string.h> |
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| 5 | |
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| 6 | // Local Exception Types and manual vtable types. |
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[406a6e6] | 7 | #define GLUE2(left, right) left##right |
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| 8 | #define GLUE3(left, middle, right) left##middle##right |
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[0ec9229] | 9 | #define BASE_EXCEPT __cfaehm__base_exception_t |
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[406a6e6] | 10 | #define TABLE(name) GLUE2(name,_vtable) |
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| 11 | #define INSTANCE(name) GLUE3(_,name,_vtable_instance) |
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[0ec9229] | 12 | #define TRIVIAL_EXCEPTION(name) \ |
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| 13 | struct name; \ |
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| 14 | struct TABLE(name) { \ |
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[406a6e6] | 15 | struct TABLE(BASE_EXCEPT) const * parent; \ |
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[0ec9229] | 16 | size_t size; \ |
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| 17 | void (*copy)(name *this, name * other); \ |
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| 18 | void (*free)(name *this); \ |
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| 19 | const char * (*msg)(name *this); \ |
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| 20 | }; \ |
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| 21 | extern TABLE(name) INSTANCE(name); \ |
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| 22 | struct name { \ |
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| 23 | struct TABLE(name) const * virtual_table; \ |
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| 24 | }; \ |
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| 25 | const char * name##_msg(name * this) { \ |
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| 26 | return #name; \ |
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| 27 | } \ |
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| 28 | void name##_copy(name * this, name * other) { \ |
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| 29 | this->virtual_table = other->virtual_table; \ |
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| 30 | } \ |
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| 31 | TABLE(name) INSTANCE(name) @= { \ |
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[406a6e6] | 32 | .parent : &INSTANCE(BASE_EXCEPT), \ |
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[0ec9229] | 33 | .size : sizeof(name), .copy : name##_copy, \ |
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| 34 | .free : ^?{}, .msg : name##_msg \ |
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| 35 | }; \ |
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| 36 | void ?{}(name * this) { \ |
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| 37 | this->virtual_table = &INSTANCE(name); \ |
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| 38 | } |
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| 39 | TRIVIAL_EXCEPTION(yin) |
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| 40 | TRIVIAL_EXCEPTION(yang) |
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| 41 | |
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| 42 | struct num_error; |
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| 43 | struct num_error_vtable { |
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[406a6e6] | 44 | struct TABLE(BASE_EXCEPT) const * parent; |
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[0ec9229] | 45 | size_t size; |
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| 46 | void (*copy)(num_error *this, num_error * other); |
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| 47 | void (*free)(num_error *this); |
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| 48 | const char * (*msg)(num_error *this); |
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| 49 | int (*code)(num_error *this); |
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| 50 | }; |
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| 51 | extern num_error_vtable INSTANCE(num_error); |
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| 52 | struct num_error { |
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| 53 | struct num_error_vtable const * virtual_table; |
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| 54 | char * msg; |
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| 55 | int num; |
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| 56 | }; |
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| 57 | void num_error_msg(num_error * this) { |
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| 58 | if ( ! this->msg ) { |
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| 59 | const char * base = "Num Error with code: X"; |
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| 60 | this->msg = strdup( base ); |
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| 61 | } |
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| 62 | this->msg[21] = '0' + this->num; |
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| 63 | return this->msg; |
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| 64 | } |
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| 65 | void ?{}(num_error * this, int num) { |
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[406a6e6] | 66 | this->virtual_table = &INSTANCE(num_error); |
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[0ec9229] | 67 | this->msg = 0; |
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| 68 | this->num = num; |
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| 69 | } |
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| 70 | void ?{}(num_error * this, num_error * other) { |
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| 71 | this->virtual_table = other->virtual_table; |
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| 72 | this->msg = 0; |
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| 73 | this->num = other->num; |
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| 74 | } |
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| 75 | void ^?{}(num_error * this) { |
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| 76 | if( this->msg ) free( this->msg ); |
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| 77 | } |
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| 78 | int num_error_code( num_error * this ) { |
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| 79 | return this->num; |
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| 80 | } |
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| 81 | num_error_vtable _num_error_vtable_instance @= { |
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| 82 | &___cfaehm__base_exception_t_vtable_instance, |
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| 83 | sizeof(num_error), ?{}, ^?{}, |
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| 84 | num_error_msg, num_error_code |
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| 85 | }; |
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| 86 | |
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| 87 | |
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| 88 | // Test simple throwing, matching and catching. |
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| 89 | void throw_catch() { |
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| 90 | try { |
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| 91 | yin black; |
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| 92 | throw (BASE_EXCEPT *)&black; |
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| 93 | } catch( yin * error ) { |
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| 94 | printf("throw yin caught.\n"); |
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| 95 | } |
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| 96 | |
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| 97 | try { |
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| 98 | yang white; |
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| 99 | throwResume (BASE_EXCEPT *)&white; |
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| 100 | printf("> throwResume returned.\n"); |
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| 101 | } catchResume( yang * error ) { |
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| 102 | printf("throwResume yang caught <"); |
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| 103 | } |
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| 104 | |
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| 105 | /* Conditional catches are still a work in progress. |
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| 106 | try { |
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| 107 | num_error x = { 2 }; |
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| 108 | throw (struct exception_t *)&x; |
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| 109 | } |
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| 110 | catch (num_error * error0 ; 3 == error0->virtual_table->code( error0 ) ) { |
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| 111 | printf("exception at %p\n", error0 ); |
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| 112 | printf("Should not be printed.\n"); |
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| 113 | } |
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| 114 | catch (num_error * error1 ; 2 == error1->virtual_table->code( error1 ) ) { |
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| 115 | printf("Should be printed.\n"); |
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| 116 | }*/ |
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| 117 | } |
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| 118 | |
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| 119 | int main (int argc, char * argv[]) { |
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| 120 | throw_catch(); |
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| 121 | return 0; |
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| 122 | } |
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