What is the purpose of replacing expressions, used as limits in a
to:do: call with by a new temporary variable?
For example:
OCOpalExamples>>#exampleToDoArgumentLimitIsExpression
the code is
exampleToDoArgumentLimitIsExpression
| count sum |
count := 10.
sum := 0.
1 to: count - 1 do: [ :each | sum := sum + each].
^sum
the decompiled bytecode :
exampleToDoArgumentLimitIsExpression
| tmp1 tmp2 tmp3 |
tmp1 := 10.
tmp2 := 0.
tmp3 := tmp1 - 1.
1 to: tmp3 do: [ :tmp4 | tmp2 := tmp2 + tmp4 ].
^ tmp2
So, the expression (count - 1) in the to:do: loop is replaced by a new
temporay (tmp3).
Ok, but why ?
