| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except |
| * in compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.js.ast; |
| |
| import com.google.gwt.dev.common.InliningMode; |
| import com.google.gwt.dev.jjs.SourceInfo; |
| import com.google.gwt.dev.jjs.SourceOrigin; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Represents a JavaScript function expression. |
| */ |
| public final class JsFunction extends JsLiteral implements HasName { |
| |
| protected JsBlock body; |
| protected final List<JsParameter> params = new ArrayList<JsParameter>(); |
| protected final JsScope scope; |
| private boolean isClinit; |
| private boolean fromJava; |
| private JsFunction superClinit; |
| private JsName name; |
| private InliningMode inliningMode = InliningMode.NORMAL; |
| |
| /** |
| * Creates an anonymous function. |
| */ |
| public JsFunction(SourceInfo sourceInfo, JsScope parent) { |
| this(sourceInfo, parent, null, false); |
| } |
| |
| /** |
| * Creates a function that is not derived from Java source. |
| */ |
| public JsFunction(SourceInfo sourceInfo, JsScope parent, JsName name) { |
| this(sourceInfo, parent, name, false); |
| } |
| |
| /** |
| * Creates a named function, possibly derived from Java source. |
| */ |
| public JsFunction(SourceInfo sourceInfo, JsScope parent, JsName name, boolean fromJava) { |
| super(sourceInfo); |
| assert (parent != null); |
| this.fromJava = fromJava; |
| setName(name); |
| String scopeName = (name == null) ? "<anonymous>" : name.getIdent(); |
| scopeName = "function " + scopeName; |
| this.scope = new JsNormalScope(parent, scopeName); |
| } |
| |
| /** |
| * Creates a dummy JsFunction (only used by createSentinel). |
| */ |
| private JsFunction() { |
| super(SourceOrigin.UNKNOWN); |
| this.scope = null; |
| } |
| |
| /** |
| * Creates a dummy JsFunction object to be used as a sentinel. |
| * |
| * @return a dummy JsFunction object. |
| */ |
| public static JsFunction createSentinel() { |
| return new JsFunction(); |
| } |
| |
| public JsBlock getBody() { |
| return body; |
| } |
| |
| /** |
| * Returns whether this function is the implementation of a class initiliazer. Class initializers |
| * need only be executed once, hence the optimizers can remove subsequent calls. |
| */ |
| public boolean isClinit() { |
| return isClinit; |
| } |
| |
| public JsFunction getSuperClinit() { |
| return superClinit; |
| } |
| |
| public InliningMode getInliningMode() { |
| return inliningMode; |
| } |
| |
| @Override |
| public NodeKind getKind() { |
| return NodeKind.FUNCTION; |
| } |
| |
| @Override |
| public JsName getName() { |
| return name; |
| } |
| |
| public List<JsParameter> getParameters() { |
| return params; |
| } |
| |
| public JsScope getScope() { |
| return scope; |
| } |
| |
| @Override |
| public boolean hasSideEffects() { |
| // If there's a name, the name is assigned to. |
| return name != null; |
| } |
| |
| @Override |
| public boolean isBooleanFalse() { |
| return false; |
| } |
| |
| @Override |
| public boolean isBooleanTrue() { |
| return true; |
| } |
| |
| @Override |
| public boolean isDefinitelyNull() { |
| return false; |
| } |
| |
| public boolean isFromJava() { |
| return fromJava; |
| } |
| |
| public boolean isInliningAllowed() { |
| return inliningMode != InliningMode.DO_NOT_INLINE; |
| } |
| |
| public void markAsClinit() { |
| this.isClinit = true; |
| } |
| |
| public void setBody(JsBlock body) { |
| this.body = body; |
| } |
| |
| public void setFromJava(boolean fromJava) { |
| this.fromJava = fromJava; |
| } |
| |
| public void setSuperClinit(JsFunction superClinit) { |
| this.superClinit = superClinit; |
| } |
| |
| public void setInliningMode(InliningMode inliningMode) { |
| this.inliningMode = inliningMode; |
| } |
| |
| public void setName(JsName name) { |
| this.name = name; |
| if (name != null) { |
| if (isFromJava()) { |
| name.setStaticRef(this); |
| } |
| } |
| } |
| |
| @Override |
| public void traverse(JsVisitor v, JsContext ctx) { |
| if (v.visit(this, ctx)) { |
| v.acceptWithInsertRemove(params); |
| body = v.accept(body); |
| } |
| v.endVisit(this, ctx); |
| } |
| } |