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34 lines
723 B
34 lines
723 B
5 years ago
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This issue type indicates pure functions. For instance, below functions would be marked as pure:
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```java
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int local_write_pure(int x, int y) {
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int k = x + y;
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k++;
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return k;
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}
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// no change to outside state, the local allocation is ok.
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int local_alloc_pure(ArrayList<Integer> list) {
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ArrayList<Integer> list_new = new ArrayList<Integer>();
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for (Integer el : list) {
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list_new.add(el);
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}
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return list_new.size();
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}
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```
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However, the following ones would not be pure:
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```java
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void swap_impure(int[] array, int i, int j) {
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int tmp = array[i];
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array[i] = array[j]; // modifying the input array
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array[j] = tmp;
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}
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int a = 0;
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void set_impure(int x, int y) {
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a = x + y; //modifying a global variable
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}
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```
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