001    /* Copyright 2000, 2001, Compaq Computer Corporation */
002    
003    /* IF THIS IS A JAVA FILE, DO NOT EDIT IT!  
004    
005       Most Java files in this directory which are part of the Javafe AST
006       are automatically generated using the astgen comment (see
007       ESCTools/Javafe/astgen) from the input file 'hierarchy.h'.  If you
008       wish to modify AST classes or introduce new ones, modify
009       'hierarchy.j.'
010     */
011    
012    package javafe.ast;
013    
014    import javafe.util.Assert;
015    import javafe.util.Location;
016    import javafe.util.ErrorSet;
017    
018    // Convention: unless otherwise noted, integer fields named "loc" refer
019    // to the location of the first character of the syntactic unit
020    
021    
022    /**
023     * Represents an Expression.
024     *
025     * We define Expr as a subclass of VarInit to yield a more compact
026     * representation. An alternative is for VarInit to contain a pointer
027     * to an Expr, which would result in a number of additional pointers,
028     * in particular for array initializers.
029     */
030    
031    public abstract class Expr extends VarInit
032    { 
033    
034    // Generated boilerplate constructors:
035    
036       /**
037        * Construct a raw Expr whose class invariant(s) have not
038        * yet been established.  It is the caller's job to
039        * initialize the returned node's fields so that any
040        * class invariants hold.
041        */
042       //@ requires I_will_establish_invariants_afterwards;
043       protected Expr() {}    //@ nowarn Invariant,NonNullInit;
044    
045       public void check() {
046          super.check();
047       }
048    
049    }