Triangle tools from the text book Programming Processors in Java.
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Triangle-Tools/Triangle.Compiler/src/main/java/Triangle/StdEnvironment.java

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/*
* @(#)StdEnvironment.java 2.1 2003/10/07
*
* Copyright (C) 1999, 2003 D.A. Watt and D.F. Brown
* Dept. of Computing Science, University of Glasgow, Glasgow G12 8QQ Scotland
* and School of Computer and Math Sciences, The Robert Gordon University,
* St. Andrew Street, Aberdeen AB25 1HG, Scotland.
* All rights reserved.
*
* This software is provided free for educational use only. It may
* not be used for commercial purposes without the prior written permission
* of the authors.
*/
package Triangle;
import Triangle.AbstractSyntaxTrees.BinaryOperatorDeclaration;
import Triangle.AbstractSyntaxTrees.ConstDeclaration;
import Triangle.AbstractSyntaxTrees.FuncDeclaration;
import Triangle.AbstractSyntaxTrees.ProcDeclaration;
import Triangle.AbstractSyntaxTrees.TypeDeclaration;
import Triangle.AbstractSyntaxTrees.TypeDenoter;
import Triangle.AbstractSyntaxTrees.UnaryOperatorDeclaration;
public final class StdEnvironment {
// These are small ASTs representing standard types.
public static TypeDenoter booleanType, charType, integerType, anyType, errorType;
public static TypeDeclaration booleanDecl, charDecl, integerDecl;
// These are small ASTs representing "declarations" of standard entities.
public static ConstDeclaration falseDecl, trueDecl, maxintDecl;
public static UnaryOperatorDeclaration notDecl;
public static BinaryOperatorDeclaration andDecl, orDecl,
addDecl, subtractDecl, multiplyDecl, divideDecl, moduloDecl,
equalDecl, unequalDecl, lessDecl, notlessDecl, greaterDecl, notgreaterDecl;
public static ProcDeclaration getDecl, putDecl, getintDecl, putintDecl, geteolDecl, puteolDecl;
public static FuncDeclaration chrDecl, ordDecl, eolDecl, eofDecl;
}