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improve definition of assign expression behaviour #2881

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improve definition of assign expression behaviour #2881

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fa192a0
improve define behaviour of assign expression
Alexibu Nov 17, 2020
600081c
specify that operands/arguments evaluated before operators/functions
Alexibu Nov 18, 2020
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2 changes: 2 additions & 0 deletions spec/expression.dd
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Expand Up @@ -75,6 +75,8 @@ subexpression `h()` has no smallest short-circuit expression.

$(H2 $(LNAME2 order-of-evaluation, Order Of Evaluation))

$(P Operands are evaluated before operators are executed. Arguments are evaluated before functions are called.)

$(P Built-in prefix unary expressions `++` and `--` are evaluated as if lowered (rewritten) to
assignments as follows: `++expr` becomes `((expr) += 1)`, and `--expr` becomes `((expr) -= 1)`.
Therefore, the result of prefix `++` and `--` is the lvalue after the side effect has been
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