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 SubstExpr extends GCExpr 031 { 032 public /*@ non_null @*/ GenericVarDecl var; 033 034 public /*@ non_null @*/ Expr val; 035 036 public /*@ non_null @*/ Expr target; 037 038 039 040 // Generated boilerplate constructors: 041 042 /** 043 * Construct a raw SubstExpr whose class invariant(s) have not 044 * yet been established. It is the caller's job to 045 * initialize the returned node's fields so that any 046 * class invariants hold. 047 */ 048 //@ requires I_will_establish_invariants_afterwards; 049 protected SubstExpr() {} //@ nowarn Invariant,NonNullInit; 050 051 052 // Generated boilerplate methods: 053 054 public final int childCount() { 055 return 3; 056 } 057 058 public final Object childAt(int index) { 059 /*throws IndexOutOfBoundsException*/ 060 if (index < 0) 061 throw new IndexOutOfBoundsException("AST child index " + index); 062 int indexPre = index; 063 064 int sz; 065 066 if (index == 0) return this.var; 067 else index--; 068 069 if (index == 0) return this.val; 070 else index--; 071 072 if (index == 0) return this.target; 073 else index--; 074 075 throw new IndexOutOfBoundsException("AST child index " + indexPre); 076 } //@ nowarn Exception; 077 078 public final String toString() { 079 return "[SubstExpr" 080 + " sloc = " + this.sloc 081 + " eloc = " + this.eloc 082 + " var = " + this.var 083 + " val = " + this.val 084 + " target = " + this.target 085 + "]"; 086 } 087 088 public final int getTag() { 089 return TagConstants.SUBSTEXPR; 090 } 091 092 public final void accept(javafe.ast.Visitor v) { 093 if (v instanceof Visitor) ((Visitor)v).visitSubstExpr(this); 094 } 095 096 public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 097 if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitSubstExpr(this, o); else return null; 098 } 099 100 public void check() { 101 super.check(); 102 this.var.check(); 103 this.val.check(); 104 this.target.check(); 105 } 106 107 //@ ensures \result != null; 108 public static SubstExpr make(int sloc, int eloc, /*@ non_null @*/ GenericVarDecl var, /*@ non_null @*/ Expr val, /*@ non_null @*/ Expr target) { 109 //@ set I_will_establish_invariants_afterwards = true; 110 SubstExpr result = new SubstExpr(); 111 result.sloc = sloc; 112 result.eloc = eloc; 113 result.var = var; 114 result.val = val; 115 result.target = target; 116 return result; 117 } 118 }