This would be impossible to implement in the general case because the compiler would essentially be solving an equation. In most cases, this would be impossible because there could be multiple solutions for a depending on the value of b. In other cases, reversing the operation would simply be impossible, e.g. a hash function.
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This would be impossible to implement in the general case because the compiler would essentially be solving an equation. In most cases, this would be impossible because there could be multiple solutions for a depending on the value of b. In other cases, reversing the operation would simply be impossible, e.g. a hash function.