RealView Compilation Tools - ARM Information Center

Language Extensions
Example
int Case_Ranges_0(int arg)
{
int aLocal;
int bLocal =arg;
switch (bLocal)
{
case 0 ... 10:
aLocal= 1;
break;
case 11 ... 100:
aLocal =2;
break;
default:
aLocal=-1;
}
return aLocal;
}
3.7.4 Cast of a union
A cast to a union type is similar to other casts, except that the type specified is a union
type. You can specify the type either with a union tag or with a typedef name.
Mode
Supported in GNU mode for C90 and C99 only.
Example
typedef union
{
double d;
int i;
} foo_t;
int Cast_to_Union_0(int a, double b)
{
}
foo_t u;
if (a>100)
u = (foo_t) a ; // automatically equivalent to u.i=a;
else
u = (foo_t) b ; // automatically equivalent to u.d=b;
return u.i;
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