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 }