| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.ir; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import jdk.nashorn.internal.codegen.types.Type; |
| import jdk.nashorn.internal.ir.annotations.Ignore; |
| import jdk.nashorn.internal.ir.annotations.Immutable; |
| import jdk.nashorn.internal.ir.visitor.NodeVisitor; |
| |
| /** |
| * IR representation for a function call. |
| */ |
| @Immutable |
| public final class CallNode extends LexicalContextNode implements TypeOverride<CallNode> { |
| |
| private final Type type; |
| |
| /** Function identifier or function body. */ |
| private final Node function; |
| |
| /** Call arguments. */ |
| private final List<Node> args; |
| |
| /** Is this a "new" operation */ |
| public static final int IS_NEW = 0x1; |
| |
| private final int flags; |
| |
| /** |
| * Arguments to be passed to builtin {@code eval} function |
| */ |
| public static class EvalArgs { |
| /** evaluated code */ |
| private final Node code; |
| |
| /** 'this' passed to evaluated code */ |
| private final IdentNode evalThis; |
| |
| /** location string for the eval call */ |
| private final String location; |
| |
| /** is this call from a strict context? */ |
| private final boolean strictMode; |
| |
| /** |
| * Constructor |
| * |
| * @param code code to evaluate |
| * @param evalThis this node |
| * @param location location for the eval call |
| * @param strictMode is this a call from a strict context? |
| */ |
| public EvalArgs(final Node code, final IdentNode evalThis, final String location, final boolean strictMode) { |
| this.code = code; |
| this.evalThis = evalThis; |
| this.location = location; |
| this.strictMode = strictMode; |
| } |
| |
| /** |
| * Return the code that is to be eval:ed by this eval function |
| * @return code as an AST node |
| */ |
| public Node getCode() { |
| return code; |
| } |
| |
| private EvalArgs setCode(final Node code) { |
| if (this.code == code) { |
| return this; |
| } |
| return new EvalArgs(code, evalThis, location, strictMode); |
| } |
| |
| /** |
| * Get the {@code this} symbol used to invoke this eval call |
| * @return the {@code this} symbol |
| */ |
| public IdentNode getThis() { |
| return this.evalThis; |
| } |
| |
| private EvalArgs setThis(final IdentNode evalThis) { |
| if (this.evalThis == evalThis) { |
| return this; |
| } |
| return new EvalArgs(code, evalThis, location, strictMode); |
| } |
| |
| /** |
| * Get the human readable location for this eval call |
| * @return the location |
| */ |
| public String getLocation() { |
| return this.location; |
| } |
| |
| /** |
| * Check whether this eval call is executed in strict mode |
| * @return true if executed in strict mode, false otherwise |
| */ |
| public boolean getStrictMode() { |
| return this.strictMode; |
| } |
| } |
| |
| /** arguments for 'eval' call. Non-null only if this call node is 'eval' */ |
| @Ignore |
| private final EvalArgs evalArgs; |
| |
| /** |
| * Constructors |
| * |
| * @param lineNumber line number |
| * @param token token |
| * @param finish finish |
| * @param function the function to call |
| * @param args args to the call |
| */ |
| public CallNode(final int lineNumber, final long token, final int finish, final Node function, final List<Node> args) { |
| super(lineNumber, token, finish); |
| |
| this.function = function; |
| this.args = args; |
| this.flags = 0; |
| this.type = null; |
| this.evalArgs = null; |
| } |
| |
| private CallNode(final CallNode callNode, final Node function, final List<Node> args, final int flags, final Type type, final EvalArgs evalArgs) { |
| super(callNode); |
| this.function = function; |
| this.args = args; |
| this.flags = flags; |
| this.type = type; |
| this.evalArgs = evalArgs; |
| } |
| |
| @Override |
| public Type getType() { |
| if (hasCallSiteType()) { |
| return type; |
| } |
| return function instanceof FunctionNode ? ((FunctionNode)function).getReturnType() : Type.OBJECT; |
| } |
| |
| @Override |
| public CallNode setType(final TemporarySymbols ts, final LexicalContext lc, final Type type) { |
| if (this.type == type) { |
| return this; |
| } |
| return new CallNode(this, function, args, flags, type, evalArgs); |
| } |
| |
| private boolean hasCallSiteType() { |
| return this.type != null; |
| } |
| |
| @Override |
| public boolean canHaveCallSiteType() { |
| return true; |
| } |
| |
| /** |
| * Assist in IR navigation. |
| * |
| * @param visitor IR navigating visitor. |
| * |
| * @return node or replacement |
| */ |
| @Override |
| public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) { |
| if (visitor.enterCallNode(this)) { |
| final CallNode newCallNode = (CallNode)visitor.leaveCallNode( |
| setFunction(function.accept(visitor)). |
| setArgs(Node.accept(visitor, Node.class, args)). |
| setFlags(flags). |
| setType(null, lc, type). |
| setEvalArgs(evalArgs == null ? |
| null : |
| evalArgs.setCode(evalArgs.getCode().accept(visitor)). |
| setThis((IdentNode)evalArgs.getThis().accept(visitor)))); |
| // Theoretically, we'd need to instead pass lc to every setter and do a replacement on each. In practice, |
| // setType from TypeOverride can't accept a lc, and we don't necessarily want to go there now. |
| if(this != newCallNode) { |
| return Node.replaceInLexicalContext(lc, this, newCallNode); |
| } |
| } |
| |
| return this; |
| } |
| |
| @Override |
| public void toString(final StringBuilder sb) { |
| if (hasCallSiteType()) { |
| sb.append('{'); |
| final String desc = getType().getDescriptor(); |
| sb.append(desc.charAt(desc.length() - 1) == ';' ? 'O' : getType().getDescriptor()); |
| sb.append('}'); |
| } |
| |
| function.toString(sb); |
| |
| sb.append('('); |
| |
| boolean first = true; |
| |
| for (final Node arg : args) { |
| if (!first) { |
| sb.append(", "); |
| } else { |
| first = false; |
| } |
| |
| arg.toString(sb); |
| } |
| |
| sb.append(')'); |
| } |
| |
| /** |
| * Get the arguments for the call |
| * @return a list of arguments |
| */ |
| public List<Node> getArgs() { |
| return Collections.unmodifiableList(args); |
| } |
| |
| /** |
| * Reset the arguments for the call |
| * @param args new arguments list |
| */ |
| private CallNode setArgs(final List<Node> args) { |
| if (this.args == args) { |
| return this; |
| } |
| return new CallNode(this, function, args, flags, type, evalArgs); |
| } |
| |
| /** |
| * If this call is an {@code eval} call, get its EvalArgs structure |
| * @return EvalArgs for call |
| */ |
| public EvalArgs getEvalArgs() { |
| return evalArgs; |
| } |
| |
| /** |
| * Set the EvalArgs structure for this call, if it has been determined it is an |
| * {@code eval} |
| * |
| * @param evalArgs eval args |
| * @return same node or new one on state change |
| */ |
| public CallNode setEvalArgs(final EvalArgs evalArgs) { |
| if (this.evalArgs == evalArgs) { |
| return this; |
| } |
| return new CallNode(this, function, args, flags, type, evalArgs); |
| } |
| |
| /** |
| * Check if this call is a call to {@code eval} |
| * @return true if this is a call to {@code eval} |
| */ |
| public boolean isEval() { |
| return evalArgs != null; |
| } |
| |
| /** |
| * Return the function expression that this call invokes |
| * @return the function |
| */ |
| public Node getFunction() { |
| return function; |
| } |
| |
| /** |
| * Reset the function expression that this call invokes |
| * @param function the function |
| * @return same node or new one on state change |
| */ |
| public CallNode setFunction(final Node function) { |
| if (this.function == function) { |
| return this; |
| } |
| return new CallNode(this, function, args, flags, type, evalArgs); |
| } |
| |
| /** |
| * Check if this call is a new operation |
| * @return true if this a new operation |
| */ |
| public boolean isNew() { |
| return (flags & IS_NEW) == IS_NEW; |
| } |
| |
| /** |
| * Flag this call as a new operation |
| * @return same node or new one on state change |
| */ |
| public CallNode setIsNew() { |
| return setFlags(IS_NEW); |
| } |
| |
| private CallNode setFlags(final int flags) { |
| if (this.flags == flags) { |
| return this; |
| } |
| return new CallNode(this, function, args, flags, type, evalArgs); |
| } |
| } |