import jdk.nashorn.internal.AssertsEnabled; //导入依赖的package包/类
/**
 * Copy a compilation state from an original function to this function. Used when creating synthetic
 * function nodes by the splitter.
 *
 * @param lc lexical context
 * @param original the original function node to copy compilation state from
 * @return function node or a new one if state was changed
 */
public FunctionNode copyCompilationState(final LexicalContext lc, final FunctionNode original) {
    final EnumSet<CompilationState> origState = original.compilationState;
    if (!AssertsEnabled.assertsEnabled() || this.compilationState.containsAll(origState)) {
        return this;
    }
    final EnumSet<CompilationState> newState = EnumSet.copyOf(this.compilationState);
    newState.addAll(origState);
    return setCompilationState(lc, newState);
}
 

import jdk.nashorn.internal.AssertsEnabled; //导入依赖的package包/类
/**
 * Add a state to the total CompilationState of this node, e.g. if
 * FunctionNode has been lowered, the compiler will add
 * {@code CompilationState#LOWERED} to the state vector
 *
 * @param lc lexical context
 * @param state {@link CompilationState} to add
 * @return function node or a new one if state was changed
 */
public FunctionNode setState(final LexicalContext lc, final CompilationState state) {
    if (!AssertsEnabled.assertsEnabled() || this.compilationState.contains(state)) {
        return this;
    }
    final EnumSet<CompilationState> newState = EnumSet.copyOf(this.compilationState);
    newState.add(state);
    return setCompilationState(lc, newState);
}
 

import jdk.nashorn.internal.AssertsEnabled; //导入依赖的package包/类
/**
 * Check whether this FunctionNode has reached a give CompilationState.
 *
 * @param state the state to check for
 * @return true of the node is in the given state
 */
public boolean hasState(final EnumSet<CompilationState> state) {
    return !AssertsEnabled.assertsEnabled() || compilationState.containsAll(state);
}