    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    }