23 lines
330 B
C
23 lines
330 B
C
typedef struct x
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{
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struct x *type;
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struct x *chain;
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struct x *value;
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} *tree;
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int
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func (new, old)
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register tree new, old;
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{
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if (old->type == 0 || new->type == 0)
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{
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register tree t = old->type;
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if (t == 0)
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t = new->type;
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for (; t; t = t->chain )
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if (t->value)
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return 1;
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}
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return 0;
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}
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