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sav08:semantics_of_field_reads_and_writes [2008/04/08 20:16] vkuncak |
sav08:semantics_of_field_reads_and_writes [2009/03/18 10:19] vkuncak |
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| Use function update construct: | Use function update construct: | ||
| \[ | \[ | ||
| - | f := f(x:=y) | + | f = f(x:=y) |
| \] | \] | ||
| + | State variable $f$, which denotes a function, is assigned an updated version of this function. | ||
| ++++ | ++++ | ||
| - | |||
| - | What about null pointer checks? | ||
| - | |||
| - | Examples: | ||
| - | y = x.next.next | ||
| - | x.next.next.prev = y | ||
| - | (x = null | x.next == y) | ||
| - | |||
| - | Statement simplification. | ||