static String variableToString(Tag tag, Attribute attrLabel, String defaultValue) {
Expression value = attrLabel.getValue();
while (value instanceof Cast) value = ((Cast) value).getExpr();
if (value instanceof Variable) {
Variable var = (Variable) value;
try {
return VariableString.variableToString(var, true);
} catch (Throwable t) {
}
}
return defaultValue;
}
/**
* @param type
* @param name
* @param b
* @param line
* @throws BytecodeException
*/
public void addCatch(Expression type, Expression name, Body b, Position line)
throws BytecodeException {
// type
if (type == null || type instanceof ExprString) ;
else if (type instanceof Variable) {
type = VariableString.toExprString(type);
} else throw new BytecodeException("type from catch statement is invalid", type.getStart());
// name
if (name instanceof LitString) {
Variable v = new Variable(Scope.SCOPE_UNDEFINED, name.getStart(), name.getEnd());
v.addMember(new DataMember(name));
name = new VariableRef(v);
} else if (name instanceof Variable) name = new VariableRef((Variable) name);
else throw new BytecodeException("name from catch statement is invalid", name.getStart());
addCatch((ExprString) type, (VariableRef) name, b, line);
}