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com.google.gwt.dev.jjs.ast.JVisitor Maven / Gradle / Ivy
/*
* 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.jjs.ast;
import com.google.gwt.dev.jjs.InternalCompilerException;
import com.google.gwt.dev.jjs.ast.js.JMultiExpression;
import com.google.gwt.dev.jjs.ast.js.JsCastMap;
import com.google.gwt.dev.jjs.ast.js.JsCastMap.JsQueryType;
import com.google.gwt.dev.jjs.ast.js.JsniFieldRef;
import com.google.gwt.dev.jjs.ast.js.JsniMethodBody;
import com.google.gwt.dev.jjs.ast.js.JsniMethodRef;
import com.google.gwt.dev.jjs.ast.js.JsonArray;
import com.google.gwt.dev.jjs.ast.js.JsonObject;
import com.google.gwt.dev.jjs.ast.js.JsonObject.JsonPropInit;
import java.util.List;
/**
* A visitor for iterating through an AST.
*/
@SuppressWarnings("unused")
public class JVisitor {
protected static final Context LVALUE_CONTEXT = new Context() {
public boolean canInsert() {
return false;
}
public boolean canRemove() {
return false;
}
public void insertAfter(JNode node) {
throw new UnsupportedOperationException();
}
public void insertBefore(JNode node) {
throw new UnsupportedOperationException();
}
public boolean isLvalue() {
return true;
}
public void removeMe() {
throw new UnsupportedOperationException();
}
public void replaceMe(JNode node) {
throw new UnsupportedOperationException();
}
};
protected static final Context UNMODIFIABLE_CONTEXT = new Context() {
public boolean canInsert() {
return false;
}
public boolean canRemove() {
return false;
}
public void insertAfter(JNode node) {
throw new UnsupportedOperationException();
}
public void insertBefore(JNode node) {
throw new UnsupportedOperationException();
}
public boolean isLvalue() {
return false;
}
public void removeMe() {
throw new UnsupportedOperationException();
}
public void replaceMe(JNode node) {
throw new UnsupportedOperationException();
}
};
protected static InternalCompilerException translateException(JNode node, Throwable e) {
if (e instanceof VirtualMachineError) {
// Always rethrow VM errors (an attempt to wrap may fail).
throw (VirtualMachineError) e;
}
InternalCompilerException ice;
if (e instanceof InternalCompilerException) {
ice = (InternalCompilerException) e;
} else {
ice = new InternalCompilerException("Unexpected error during visit.", e);
}
ice.addNode(node);
return ice;
}
public final JExpression accept(JExpression node) {
return (JExpression) accept((JNode) node);
}
public JNode accept(JNode node) {
return accept(node, false);
}
public JNode accept(JNode node, boolean allowRemove) {
try {
node.traverse(this, UNMODIFIABLE_CONTEXT);
return node;
} catch (Throwable e) {
throw translateException(node, e);
}
}
public final JStatement accept(JStatement node) {
return accept(node, false);
}
public final JStatement accept(JStatement node, boolean allowRemove) {
return (JStatement) accept((JNode) node, allowRemove);
}
public void accept(List list) {
int i = 0;
try {
for (int c = list.size(); i < c; ++i) {
list.get(i).traverse(this, UNMODIFIABLE_CONTEXT);
}
} catch (Throwable e) {
throw translateException(list.get(i), e);
}
}
public List acceptImmutable(List list) {
accept(list);
return list;
}
public JExpression acceptLvalue(JExpression expr) {
try {
expr.traverse(this, LVALUE_CONTEXT);
return expr;
} catch (Throwable e) {
throw translateException(expr, e);
}
}
public void acceptWithInsertRemove(List list) {
accept(list);
}
public List acceptWithInsertRemoveImmutable(List list) {
accept(list);
return list;
}
public boolean didChange() {
throw new UnsupportedOperationException();
}
public void endVisit(JAbsentArrayDimension x, Context ctx) {
endVisit((JLiteral) x, ctx);
}
public void endVisit(JAbstractMethodBody x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JArrayLength x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JArrayRef x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JArrayType x, Context ctx) {
endVisit((JReferenceType) x, ctx);
}
public void endVisit(JAssertStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JBinaryOperation x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JBlock x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JBooleanLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JBreakStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JCaseStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JCastOperation x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JCharLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JClassLiteral x, Context ctx) {
endVisit((JLiteral) x, ctx);
}
public void endVisit(JClassType x, Context ctx) {
endVisit((JDeclaredType) x, ctx);
}
public void endVisit(JConditional x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JConstructor x, Context ctx) {
endVisit((JMethod) x, ctx);
}
public void endVisit(JContinueStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JDeclarationStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JDeclaredType x, Context ctx) {
endVisit((JReferenceType) x, ctx);
}
public void endVisit(JDoStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JDoubleLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JExpression x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JExpressionStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JField x, Context ctx) {
endVisit((JVariable) x, ctx);
}
/**
* NOTE: not called from JsniFieldRef.
*/
public void endVisit(JFieldRef x, Context ctx) {
endVisit((JVariableRef) x, ctx);
}
public void endVisit(JFloatLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JForStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JGwtCreate x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JIfStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JInstanceOf x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JInterfaceType x, Context ctx) {
endVisit((JDeclaredType) x, ctx);
}
public void endVisit(JIntLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JLabel x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JLabeledStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JLiteral x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JLocal x, Context ctx) {
endVisit((JVariable) x, ctx);
}
public void endVisit(JLocalRef x, Context ctx) {
endVisit((JVariableRef) x, ctx);
}
public void endVisit(JLongLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JMethod x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JMethodBody x, Context ctx) {
endVisit((JAbstractMethodBody) x, ctx);
}
/**
* NOTE: not called from JsniMethodRef.
*/
public void endVisit(JMethodCall x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JMultiExpression x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JNameOf x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JNewArray x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JNewInstance x, Context ctx) {
endVisit((JMethodCall) x, ctx);
}
public void endVisit(JNode x, Context ctx) {
// empty block
}
public void endVisit(JNullLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JNullType x, Context ctx) {
endVisit((JReferenceType) x, ctx);
}
public void endVisit(JNumericEntry x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JParameter x, Context ctx) {
endVisit((JVariable) x, ctx);
}
public void endVisit(JParameterRef x, Context ctx) {
endVisit((JVariableRef) x, ctx);
}
public void endVisit(JPostfixOperation x, Context ctx) {
endVisit((JUnaryOperation) x, ctx);
}
public void endVisit(JPrefixOperation x, Context ctx) {
endVisit((JUnaryOperation) x, ctx);
}
public void endVisit(JPrimitiveType x, Context ctx) {
endVisit((JType) x, ctx);
}
public void endVisit(JProgram x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JReboundEntryPoint x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JReferenceType x, Context ctx) {
endVisit((JType) x, ctx);
}
public void endVisit(JReturnStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JRunAsync x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JSeedIdOf x, Context ctx) {
endVisit((JNameOf) x, ctx);
}
public void endVisit(JsCastMap x, Context ctx) {
endVisit((JsonArray) x, ctx);
}
public void endVisit(JsniFieldRef x, Context ctx) {
/* NOTE: Skip JFieldRef */
endVisit((JVariableRef) x, ctx);
}
public void endVisit(JsniMethodBody x, Context ctx) {
endVisit((JAbstractMethodBody) x, ctx);
}
public void endVisit(JsniMethodRef x, Context ctx) {
/* NOTE: Skip JMethodCall */
endVisit((JExpression) x, ctx);
}
public void endVisit(JsonArray x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JsonObject x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JsonPropInit x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JsQueryType x, Context ctx) {
endVisit((JIntLiteral) x, ctx);
}
public void endVisit(JStatement x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JStringLiteral x, Context ctx) {
endVisit((JValueLiteral) x, ctx);
}
public void endVisit(JSwitchStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JThisRef x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JThrowStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JTryStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public void endVisit(JType x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JUnaryOperation x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JValueLiteral x, Context ctx) {
endVisit((JLiteral) x, ctx);
}
public void endVisit(JVariable x, Context ctx) {
endVisit((JNode) x, ctx);
}
public void endVisit(JVariableRef x, Context ctx) {
endVisit((JExpression) x, ctx);
}
public void endVisit(JWhileStatement x, Context ctx) {
endVisit((JStatement) x, ctx);
}
public boolean visit(JAbsentArrayDimension x, Context ctx) {
return visit((JLiteral) x, ctx);
}
public boolean visit(JAbstractMethodBody x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JArrayLength x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JArrayRef x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JArrayType x, Context ctx) {
return visit((JReferenceType) x, ctx);
}
public boolean visit(JAssertStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JBinaryOperation x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JBlock x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JBooleanLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JBreakStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JCaseStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JCastOperation x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JCharLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JClassLiteral x, Context ctx) {
return visit((JLiteral) x, ctx);
}
public boolean visit(JClassType x, Context ctx) {
return visit((JDeclaredType) x, ctx);
}
public boolean visit(JConditional x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JConstructor x, Context ctx) {
return visit((JMethod) x, ctx);
}
public boolean visit(JContinueStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JDeclarationStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JDeclaredType x, Context ctx) {
return visit((JReferenceType) x, ctx);
}
public boolean visit(JDoStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JDoubleLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JExpression x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JExpressionStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JField x, Context ctx) {
return visit((JVariable) x, ctx);
}
/**
* NOTE: not called from JsniFieldRef.
*/
public boolean visit(JFieldRef x, Context ctx) {
return visit((JVariableRef) x, ctx);
}
public boolean visit(JFloatLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JForStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JGwtCreate x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JIfStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JInstanceOf x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JInterfaceType x, Context ctx) {
return visit((JDeclaredType) x, ctx);
}
public boolean visit(JIntLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JLabel x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JLabeledStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JLiteral x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JLocal x, Context ctx) {
return visit((JVariable) x, ctx);
}
public boolean visit(JLocalRef x, Context ctx) {
return visit((JVariableRef) x, ctx);
}
public boolean visit(JLongLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JMethod x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JMethodBody x, Context ctx) {
return visit((JAbstractMethodBody) x, ctx);
}
/**
* NOTE: not called from JsniMethodRef.
*/
public boolean visit(JMethodCall x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JMultiExpression x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JNameOf x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JNewArray x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JNewInstance x, Context ctx) {
return visit((JMethodCall) x, ctx);
}
public boolean visit(JNode x, Context ctx) {
return true;
}
public boolean visit(JNullLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JNullType x, Context ctx) {
return visit((JReferenceType) x, ctx);
}
public boolean visit(JNumericEntry x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JParameter x, Context ctx) {
return visit((JVariable) x, ctx);
}
public boolean visit(JParameterRef x, Context ctx) {
return visit((JVariableRef) x, ctx);
}
public boolean visit(JPostfixOperation x, Context ctx) {
return visit((JUnaryOperation) x, ctx);
}
public boolean visit(JPrefixOperation x, Context ctx) {
return visit((JUnaryOperation) x, ctx);
}
public boolean visit(JPrimitiveType x, Context ctx) {
return visit((JType) x, ctx);
}
public boolean visit(JProgram x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JReboundEntryPoint x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JReferenceType x, Context ctx) {
return visit((JType) x, ctx);
}
public boolean visit(JReturnStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JRunAsync x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JSeedIdOf x, Context ctx) {
return visit((JNameOf) x, ctx);
}
public boolean visit(JsCastMap x, Context ctx) {
return visit((JsonArray) x, ctx);
}
public boolean visit(JsniFieldRef x, Context ctx) {
/* NOTE: Skip JFieldRef */
return visit((JVariableRef) x, ctx);
}
public boolean visit(JsniMethodBody x, Context ctx) {
return visit((JAbstractMethodBody) x, ctx);
}
public boolean visit(JsniMethodRef x, Context ctx) {
/* NOTE: Skip JMethodCall */
return visit((JExpression) x, ctx);
}
public boolean visit(JsonArray x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JsonObject x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JsonPropInit x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JsQueryType x, Context ctx) {
return visit((JIntLiteral) x, ctx);
}
public boolean visit(JStatement x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JStringLiteral x, Context ctx) {
return visit((JValueLiteral) x, ctx);
}
public boolean visit(JSwitchStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JThisRef x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JThrowStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JTryStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
public boolean visit(JType x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JUnaryOperation x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JValueLiteral x, Context ctx) {
return visit((JLiteral) x, ctx);
}
public boolean visit(JVariable x, Context ctx) {
return visit((JNode) x, ctx);
}
public boolean visit(JVariableRef x, Context ctx) {
return visit((JExpression) x, ctx);
}
public boolean visit(JWhileStatement x, Context ctx) {
return visit((JStatement) x, ctx);
}
}
