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 escjava.ast; 013 014 import java.util.Hashtable; 015 import java.util.Set; 016 import java.util.ArrayList; 017 018 import javafe.ast.*; 019 import javafe.util.Assert; 020 import javafe.util.Location; 021 import escjava.ParsedRoutineSpecs; 022 023 // Convention: unless otherwise noted, integer fields named "loc" refer 024 // to the location of the first character of the syntactic unit 025 026 //# TagBase javafe.tc.TagConstants.LAST_TAG + 1 027 //# VisitorRoot javafe.ast.Visitor 028 029 030 public class WildRefExpr extends Expr 031 { 032 public /*@ non_null @*/ Expr var; 033 034 public /*@ non_null @*/ ObjectDesignator od; 035 036 037 public int getStartLoc() { return od != null ? od.getStartLoc() : var.getStartLoc(); } 038 public int getEndLoc() { return od != null ? od.getEndLoc() : var.getEndLoc(); } 039 040 041 // Generated boilerplate constructors: 042 043 /** 044 * Construct a raw WildRefExpr whose class invariant(s) have not 045 * yet been established. It is the caller's job to 046 * initialize the returned node's fields so that any 047 * class invariants hold. 048 */ 049 //@ requires I_will_establish_invariants_afterwards; 050 protected WildRefExpr() {} //@ nowarn Invariant,NonNullInit; 051 052 053 // Generated boilerplate methods: 054 055 public final int childCount() { 056 return 2; 057 } 058 059 public final Object childAt(int index) { 060 /*throws IndexOutOfBoundsException*/ 061 if (index < 0) 062 throw new IndexOutOfBoundsException("AST child index " + index); 063 int indexPre = index; 064 065 int sz; 066 067 if (index == 0) return this.var; 068 else index--; 069 070 if (index == 0) return this.od; 071 else index--; 072 073 throw new IndexOutOfBoundsException("AST child index " + indexPre); 074 } //@ nowarn Exception; 075 076 public final String toString() { 077 return "[WildRefExpr" 078 + " var = " + this.var 079 + " od = " + this.od 080 + "]"; 081 } 082 083 public final int getTag() { 084 return TagConstants.WILDREFEXPR; 085 } 086 087 public final void accept(javafe.ast.Visitor v) { 088 if (v instanceof Visitor) ((Visitor)v).visitWildRefExpr(this); 089 } 090 091 public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 092 if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitWildRefExpr(this, o); else return null; 093 } 094 095 public void check() { 096 this.var.check(); 097 this.od.check(); 098 } 099 100 //@ ensures \result != null; 101 public static WildRefExpr make(/*@ non_null @*/ Expr var, /*@ non_null @*/ ObjectDesignator od) { 102 //@ set I_will_establish_invariants_afterwards = true; 103 WildRefExpr result = new WildRefExpr(); 104 result.var = var; 105 result.od = od; 106 return result; 107 } 108 }