package org.python.core;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
/**
* Represents flags that can be set on code objects.
*
* @author Tobias Ivarsson
*/
public enum CodeFlag {
/**
* Denotes that the code block uses fast locals.
*/
CO_OPTIMIZED(0x0001),
/**
* Denotes that a new dictionary should be created for the code block.
*/
CO_NEWLOCALS(0x0002),
/**
* The compiled code block has a varargs argument.
*/
CO_VARARGS(0x0004),
/**
* The compiled code block has a varkeyword argument.
*/
CO_VARKEYWORDS(0x0008),
/**
* The compiled code block is a generator code block.
*/
CO_GENERATOR(0x0020),
/**
* Denotes that nested scopes are enabled in the code block.
*/
CO_NESTED(0x0010),
/**
* Denotes that generators are enabled in the code block.
*/
CO_GENERATOR_ALLOWED(0x1000),
/**
* Standard division of integers returns float, truncating division needs to
* be enforced.
*/
CO_FUTURE_DIVISION(0x2000),
/**
* Absolute import.
*/
CO_FUTURE_ABSOLUTE_IMPORT(0x4000),
/**
* With statement.
*/
CO_FUTURE_WITH_STATEMENT(0x8000),
/**
* print function.
*/
CO_FUTURE_PRINT_FUNCTION(0x10000),
/**
* unicode literals.
*/
CO_FUTURE_UNICODE_LITERALS(0x20000);
public final int flag;
private static Iterable allFlags = Collections.unmodifiableList(Arrays.asList(values()));
private CodeFlag(int flag) {
this.flag = flag;
}
public boolean isFlagBitSetIn(int flags) {
return (flags & flag) != 0;
}
static Iterable parse(final int flags) {
return new Iterable() {
public Iterator iterator() {
return new Iterator() {
Iterator all = allFlags.iterator();
CodeFlag next = null;
public boolean hasNext() {
if (next != null) {
return true;
}
while (all.hasNext()) {
CodeFlag flag = all.next();
if (flag.isFlagBitSetIn(flags)) {
next = flag;
return true;
}
}
return false;
}
public CodeFlag next() {
if (hasNext()) try {
return next;
} finally {
next = null;
}
throw new IllegalStateException();
}
public void remove() {
throw new UnsupportedOperationException();
}
};
}
};
}
}