JavaCC语法分析词法分析源代码

/* * Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has * intellectual property rights relating to technology embodied in the product * that is described in this document. In particular, and without limitation, * these intellectual property rights may include one or more of the U.S. * patents listed at http://www.sun.com/patents and one or more additional * patents or pending patent applications in the U.S. and in other countries. * U.S. Government Rights - Commercial software. Government users are subject * to the Sun Microsystems, Inc. standard license agreement and applicable * provisions of the FAR and its supplements. Use is subject to license terms. * Sun, Sun Microsystems, the Sun logo and Java are trademarks or registered * trademarks of Sun Microsystems, Inc. in the U.S. and other countries. This * product is covered and controlled by U.S. Export Control laws and may be * subject to the export or import laws in other countries. Nuclear, missile, * chemical biological weapons or nuclear maritime end uses or end users, * whether direct or indirect, are strictly prohibited. Export or reexport * to countries subject to U.S. embargo or to entities identified on U.S. * export exclusion lists, including, but not limited to, the denied persons * and specially designated nationals lists is strictly prohibited. */ package VTransformer; import java.io.PrintStream; public class UnparseVisitor implements JavaParserVisitor { protected PrintStream out; public UnparseVisitor(PrintStream o) { out = o; } public Object print(SimpleNode node, Object data) { Token t1 = node.getFirstToken(); Token t = new Token(); t.next = t1; SimpleNode n; for (int ord = 0; ord < node.jjtGetNumChildren(); ord++) { n = (SimpleNode)node.jjtGetChild(ord); while (true) { t = t.next; if (t == n.getFirstToken()) break; print(t); } n.jjtAccept(this, data); t = n.getLastToken(); } while (t != node.getLastToken()) { t = t.next; print(t); } return data; } protected void print(Token t) { Token tt = t.specialToken; if (tt != null) { while (tt.specialToken != null) tt = tt.specialToken; while (tt != null) { out.print(addUnicodeEscapes(tt.image)); tt = tt.next; } } out.print(addUnicodeEscapes(t.image)); } private String addUnicodeEscapes(String str) { String retval = ""; char ch; for (int i = 0; i < str.length(); i++) { ch = str.charAt(i); if ((ch < 0x20 || ch > 0x7e) && ch != '\t' && ch != '\n' && ch != '\r' && ch != '\f') { String s = "0000" + Integer.toString(ch, 16); retval += "\\u" + s.substring(s.length() - 4, s.length()); } else { retval += ch; } } return retval; } public Object visit(SimpleNode node, Object data) { return print(node, data); } public Object visit(ASTCompilationUnit node, Object data) { return print(node, data); } public Object visit(ASTPackageDeclaration node, Object data) { return print(node, data); } public Object visit(ASTImportDeclaration node, Object data) { return print(node, data); } public Object visit(ASTTypeDeclaration node, Object data) { return print(node, data); } public Object visit(ASTClassDeclaration node, Object data) { return print(node, data); } public Object visit(ASTUnmodifiedClassDeclaration node, Object data) { return print(node, data); } public Object visit(ASTClassBody node, Object data) { return print(node, data); } public Object visit(ASTNestedClassDeclaration node, Object data) { return print(node, data); } public Object visit(ASTClassBodyDeclaration node, Object data) { return print(node, data); } public Object visit(ASTMethodDeclarationLookahead node, Object data) { return print(node, data); } public Object visit(ASTInterfaceDeclaration node, Object data) { return print(node, data); } public Object visit(ASTNestedInterfaceDeclaration node, Object data) { return print(node, data); } public Object visit(ASTUnmodifiedInterfaceDeclaration node, Object data) { return print(node, data); } public Object visit(ASTInterfaceMemberDeclaration node, Object data) { return print(node, data); } public Object visit(ASTFieldDeclaration node, Object data) { return print(node, data); } public Object visit(ASTVariableDeclarator node, Object data) { return print(node, data); } public Object visit(ASTVariableDeclaratorId node, Object data) { return print(node, data); } public Object visit(ASTVariableInitializer node, Object data) { return print(node, data); } public Object visit(ASTArrayInitializer node, Object data) { return print(node, data); } public Object visit(ASTMethodDeclaration node, Object data) { return print(node, data); } public Object visit(ASTMethodDeclarator node, Object data) { return print(node, data); } public Object visit(ASTFormalParameters node, Object data) { return print(node, data); } public Object visit(ASTFormalParameter node, Object data) { return print(node, data); } public Object visit(ASTConstructorDeclaration node, Object data) { return print(node, data); } public Object visit(ASTExplicitConstructorInvocation node, Object data) { return print(node, data); } public Object visit(ASTInitializer node, Object data) { return print(node, data); } public Object visit(ASTType node, Object data) { return print(node, data); } public Object visit(ASTPrimitiveType node, Object data) { return print(node, data); } public Object visit(ASTResultType node, Object data) { return print(node, data); } public Object visit(ASTName node, Object data) { return print(node, data); } public Object visit(ASTNameList node, Object data) { return print(node, data); } public Object visit(ASTExpression node, Object data) { return print(node, data); } public Object visit(ASTAssignmentOperator node, Object data) { return print(node, data); } public Object visit(ASTConditionalExpression node, Object data) { return print(node, data); } public Object visit(ASTConditionalOrExpression node, Object data) { return print(node, data); } public Object visit(ASTConditionalAndExpression node, Object data) { return print(node, data); } public Object visit(ASTInclusiveOrExpression node, Object data) { return print(node, data); } public Object visit(ASTExclusiveOrExpression node, Object data) { return print(node, data); } public Object visit(ASTAndExpression node, Object data) { return print(node, data); } public Object visit(ASTEqualityExpression node, Object data) { return print(node, data); } public Object visit(ASTInstanceOfExpression node, Object data) { return print(node, data); } public Object visit(ASTRelationalExpression node, Object data) { return print(node, data); } public Object visit(ASTShiftExpression node, Object data) { return print(node, data); } public Object visit(ASTAdditiveExpression node, Object data) { return print(node, data); } public Object visit(ASTMultiplicativeExpression node, Object data) { return print(node, data); } public Object visit(ASTUnaryExpression node, Object data) { return print(node, data); } public Object visit(ASTPreIncrementExpression node, Object data) { return print(node, data); } public Object visit(ASTPreDecrementExpression node, Object data) { return print(node, data); } public Object visit(ASTUnaryExpressionNotPlusMinus node, Object data)