ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationjenkins-sandboxnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change
on this file since b4a573c was
dc8511c,
checked in by Peter A. Buhr <pabuhr@…>, 6 years ago
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first attempt at updating suffixes for test programs
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Property mode set to
100644
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File size:
1.5 KB
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1 | // Testing the virtual cast, as part of strict inheritance. |
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2 | |
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3 | /* IMPORTANT: This test does not repersent the final feature set. |
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4 | * We are missing a number of important aspects such as: |
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5 | * + vtable type generation. |
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6 | * + vtable instance generation, that might use different resolution rules. |
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7 | * + Virtual syntax to force said generation on structures and traits. |
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8 | * + Trait references/pointers that do the virtual_table lookup. |
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9 | */ |
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10 | |
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11 | #include <stdlib.hfa> |
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12 | #include <assert.h> |
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13 | |
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14 | struct alpha_vtable { |
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15 | alpha_vtable const * const parent; |
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16 | char (*code)(void); |
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17 | }; |
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18 | |
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19 | struct alpha { |
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20 | alpha_vtable const * virtual_table; |
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21 | }; |
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22 | |
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23 | char ret_a(void) { |
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24 | return 'a'; |
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25 | } |
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26 | |
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27 | |
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28 | |
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29 | struct beta_vtable { |
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30 | alpha_vtable const * const parent; |
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31 | char (*code)(void); |
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32 | }; |
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33 | |
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34 | struct beta { |
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35 | beta_vtable const * virtual_table; |
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36 | }; |
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37 | |
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38 | char ret_b(void) { |
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39 | return 'b'; |
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40 | } |
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41 | |
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42 | |
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43 | |
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44 | struct gamma_vtable { |
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45 | beta_vtable const * const parent; |
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46 | char (*code)(void); |
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47 | }; |
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48 | |
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49 | struct gamma { |
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50 | gamma_vtable const * virtual_table; |
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51 | }; |
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52 | |
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53 | char ret_g(void) { |
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54 | return 'g'; |
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55 | } |
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56 | |
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57 | |
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58 | extern "C" { |
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59 | alpha_vtable _alpha_vtable_instance = { 0, ret_a }; |
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60 | beta_vtable _beta_vtable_instance = { &_alpha_vtable_instance, ret_b }; |
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61 | gamma_vtable _gamma_vtable_instance = { &_beta_vtable_instance, ret_g }; |
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62 | } |
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63 | |
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64 | int main (int argc, char * argv[]) { |
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65 | |
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66 | gamma * tri = malloc(); tri->virtual_table = &_gamma_vtable_instance; |
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67 | beta * mid = (virtual beta *)tri; |
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68 | assert( 'g' == mid->virtual_table->code() ); |
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69 | |
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70 | alpha * top = malloc(); top->virtual_table = &_alpha_vtable_instance; |
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71 | mid = (virtual beta *)top; |
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72 | assert( ! mid ); |
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73 | |
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74 | free(tri); |
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75 | free(top); |
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76 | } |
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