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- Jump bypasses variable initialization in switch statement
Jump bypasses variable initialization in switch statement Asked 5 years, 6 months ago Modified 5 years, 6 months ago Viewed 31k times
- Why cant variables be declared in a switch statement?
Your curly brackets define the scope as everything inside the switch statement This means that you are left with a scope where a jump will be performed further into the code skipping the initialization The correct way to handle this is to define a scope specific to that case statement and define your variable within it:
- Error: Jump to case label in switch statement - Stack Overflow
C++11 standard on jumping over some initializations JohannesD gave an explanation, now for the standards The C++11 N3337 standard draft 6 7 "Declaration statement" says: 3 It is possible to transfer into a block, but not in a way that bypasses declarations with initialization A program that jumps (87) from a point where a variable with automatic storage duration is not in scope to a point
- Is jumping over a variable initialization ill-formed or does it cause . . .
A program that jumps from a point where a variable with automatic storage duration is not in scope to a point where it is in scope is ill-formed unless the variable has vacuous initialization ( [basic life]) In such a case, the variables with vacuous initialization are constructed in the order of their declaration
- Statement goto can not cross variable definition? - Stack Overflow
Update: goto can cross variable (any type of variable, not limited to pointer) declaration, but except those that got a initialize value If we remove the NULL assignment above, g++ keep silent now So if you want to declare variables that between goto -cross-area, do not initialize them (and still violate some principles)
- error: jump to label foo crosses initialization of bar
init cpp:4:9: error: cannot jump from this goto statement to its label goto clean_up; ^ init cpp:7:9: note: jump bypasses variable initialization int i = 0; ^ ICC:
- c++ - goto crosses initialization - Stack Overflow
It is possible to transfer into a block, but not in a way that bypasses declarations with initialization A program that jumps from a point where a local variable with automatic storage duration is not in scope to a point where it is in scope is ill-formed unless the variable has POD type (3 9) and is declared without an initializer
- xcode - (iOS) Jump bypasses initialization of retaining variable when . . .
Actually the warning said it clearly, "Jump bypasses initialization of retaining variable" so in the section next In proceed to next section I declare init some object!
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