Last change
on this file since 3f37f5b was
48b7085e,
checked in by Aaron Moss <a3moss@…>, 6 years ago
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Start into generic types design in thesis
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Property mode set to
100644
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File size:
986 bytes
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Line | |
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1 | #include <stdlib.h> |
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2 | #include <stdio.h> |
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3 | |
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4 | struct int_list { int value; struct int_list* next; }; |
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5 | |
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6 | void int_list_insert( struct int_list** ls, int x ) { |
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7 | struct int_list* node = malloc(sizeof(struct int_list)); |
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8 | node->value = x; node->next = *ls; |
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9 | *ls = node; |
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10 | } |
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11 | |
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12 | int int_list_head( const struct int_list* ls ) { return ls->value; } |
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13 | |
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14 | // all code must be duplicated for every generic instantiation |
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15 | |
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16 | struct string_list { const char* value; struct string_list* next; }; |
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17 | |
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18 | void string_list_insert( struct string_list** ls, const char* x ) { |
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19 | struct string_list* node = malloc(sizeof(struct string_list)); |
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20 | node->value = x; node->next = *ls; |
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21 | *ls = node; |
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22 | } |
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23 | |
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24 | const char* string_list_head( const struct string_list* ls ) |
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25 | { return ls->value; } |
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26 | |
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27 | // use is efficient and idiomatic |
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28 | |
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29 | int main() { |
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30 | struct int_list* il = NULL; |
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31 | int_list_insert( &il, 42 ); |
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32 | printf("%d\n", int_list_head(il)); |
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33 | |
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34 | struct string_list* sl = NULL; |
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35 | string_list_insert( &sl, "hello" ); |
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36 | printf("%s\n", string_list_head(sl)); |
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37 | } |
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