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Why can switch only compare to const values?
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Kevin Peterson
Mar 22, 2013, 10:34:00 AM3/22/13
to help-gp...@gnu.org
Just curious:
Take a switch-statement like -
switch(myVar)
{
case(label):
...
break;
}
why label should be constant only?
Take a switch-statement like -
switch(myVar)
{
case(label):
...
break;
}
why label should be constant only?
Nikos Chantziaras
Mar 22, 2013, 1:54:38 PM3/22/13
to help-gp...@gnu.org
int a = 1, b = 1;
int val = 1;
switch (val) {
case a: foo(); break;
case b: bar(); break;
}
Requiring constant expressions for the cases makes sure that there's no
ambiguity, since they can be evaluated at compile time.
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