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 RestoreFromCmd extends AssignCmd 031 { 032 // denotes RESTORE v FROM rhs 033 // which has the same effect as v := rhs 034 // but does not count "v" as a target 035 036 037 // Generated boilerplate constructors: 038 039 /** 040 * Construct a raw RestoreFromCmd whose class invariant(s) have not 041 * yet been established. It is the caller's job to 042 * initialize the returned node's fields so that any 043 * class invariants hold. 044 */ 045 //@ requires I_will_establish_invariants_afterwards; 046 protected RestoreFromCmd() {} //@ nowarn Invariant,NonNullInit; 047 048 049 // Generated boilerplate methods: 050 051 public final int childCount() { 052 return 2; 053 } 054 055 public final Object childAt(int index) { 056 /*throws IndexOutOfBoundsException*/ 057 if (index < 0) 058 throw new IndexOutOfBoundsException("AST child index " + index); 059 int indexPre = index; 060 061 int sz; 062 063 if (index == 0) return this.v; 064 else index--; 065 066 if (index == 0) return this.rhs; 067 else index--; 068 069 throw new IndexOutOfBoundsException("AST child index " + indexPre); 070 } //@ nowarn Exception; 071 072 public final String toString() { 073 return "[RestoreFromCmd" 074 + " v = " + this.v 075 + " rhs = " + this.rhs 076 + "]"; 077 } 078 079 public final int getTag() { 080 return TagConstants.RESTOREFROMCMD; 081 } 082 083 public final void accept(javafe.ast.Visitor v) { 084 if (v instanceof Visitor) ((Visitor)v).visitRestoreFromCmd(this); 085 } 086 087 public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 088 if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitRestoreFromCmd(this, o); else return null; 089 } 090 091 public void check() { 092 super.check(); 093 this.v.check(); 094 this.rhs.check(); 095 } 096 097 //@ ensures \result != null; 098 public static RestoreFromCmd make(/*@ non_null @*/ VariableAccess v, /*@ non_null @*/ Expr rhs) { 099 //@ set I_will_establish_invariants_afterwards = true; 100 RestoreFromCmd result = new RestoreFromCmd(); 101 result.v = v; 102 result.rhs = rhs; 103 return result; 104 } 105 }