/**
* <strong>5.1.4 Widening and Narrowing Primitive Conversion</strong>
*
* <p>The following conversion combines both widening and narrowing primitive conversions:
*
* <p>byte to char
*
* <p>First, the byte is converted to an int via widening primitive conversion (§5.1.2), and then
* the resulting int is converted to a char by narrowing primitive conversion (§5.1.3).
*
* @param from
* @param to
* @return
*/
public static boolean checkWideningAndNarrowingPrimitiveConversion(AClass from, AClass to) {
return from.getType().getSort() == Type.BYTE && to.getType().getSort() == Type.CHAR;
}
/**
* <strong>5.1.3 Narrowing Primitive Conversion</strong>
*
* <p>22 specific conversions on primitive types are called the narrowing primitive conversions:
*
* <ul>
* <li>short to byte or char
* <li>char to byte or short
* <li>int to byte, short, or char
* <li>long to byte, short, char, or int
* <li>float to byte, short, char, int, or long
* <li>double to byte, short, char, int, long, or float
* </ul>
*
* @param from
* @param to
* @return
*/
public static boolean checkNarrowingPrimitiveConversion(AClass from, AClass to) {
int fromSort = from.getType().getSort();
int toSort = from.getType().getSort();
if (fromSort == Type.BYTE || fromSort == Type.BOOLEAN || toSort == Type.BOOLEAN) {
return false;
}
switch (fromSort) {
case Type.CHAR:
switch (toSort) {
case Type.BYTE:
case Type.SHORT:
return true;
default:
return false;
}
case Type.SHORT:
switch (toSort) {
case Type.CHAR:
case Type.BYTE:
return true;
default:
return false;
}
case Type.INT:
switch (toSort) {
case Type.CHAR:
case Type.BYTE:
case Type.SHORT:
return true;
default:
return false;
}
case Type.FLOAT:
switch (toSort) {
case Type.CHAR:
case Type.BYTE:
case Type.SHORT:
case Type.INT:
case Type.LONG:
return true;
default:
return false;
}
case Type.LONG:
switch (toSort) {
case Type.CHAR:
case Type.BYTE:
case Type.SHORT:
case Type.INT:
return true;
default:
return false;
}
case Type.DOUBLE:
switch (toSort) {
case Type.CHAR:
case Type.BYTE:
case Type.SHORT:
case Type.INT:
case Type.FLOAT:
case Type.LONG:
return true;
default:
return false;
}
default:
return false;
}
}