why the VC8 treat goto and switch-case different?

[miaohua1982]

under the same warning level, the code is:

class X{
public:
X(){}
virtual void g(){}
};
void f(int i){
if(i<10)
goto jump1;
X x1;
jump1: //warning C4533: initialization of 'x1' is skipped by 'goto
jump1',why there is only a warning?

switch(i){
case 1:
X x2;
break;
case 2: //error C2360: initialization of 'x2' is skipped by 'case'
label
X x3;
break;
}
}

[Bo Persson]

mi*********@gma il.com wrote:

under the same warning level, the code is:

class X{
public:
X(){}
virtual void g(){}
};
void f(int i){
if(i<10)
goto jump1;
X x1;
jump1: //warning C4533: initialization of 'x1' is skipped by
'goto jump1',why there is only a warning?

switch(i){
case 1:
X x2;
break;
case 2: //error C2360: initialization of 'x2' is skipped by
'case' label
X x3;
break;
}
}

The language standard doesn't say anything about different levels, it just
speaks of a 'diagnostic' required for certain faults. The rest is up to the
implementation, inluding any additional messages for these kinds of
constructs.

Most compilers have a setting like 'treat warnings as errors', to get away
with your problem.
Bo Persson

[miaohua1982]

Thank you very much!

"Bo Persson дµÀ£º
"

mi*********@gma il.com wrote:

under the same warning level, the code is:

class X{
public:
X(){}
virtual void g(){}
};
void f(int i){
if(i<10)
goto jump1;
X x1;
jump1: //warning C4533: initialization of 'x1' is skipped by
'goto jump1',why there is only a warning?

switch(i){
case 1:
X x2;
break;
case 2: //error C2360: initialization of 'x2' is skipped by
'case' label
X x3;
break;
}
}

The language standard doesn't say anything about different levels, it just
speaks of a 'diagnostic' required for certain faults. The rest is up to the
implementation, inluding any additional messages for these kinds of
constructs.

Most compilers have a setting like 'treat warnings as errors', to get away
with your problem.
Bo Persson