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 VarExprModifierPragma extends ModifierPragma 031 { 032 // Extended to support JML 033 034 public int tag; 035 036 public /*@ non_null @*/ GenericVarDecl arg; 037 038 public /*@ non_null @*/ Expr expr; 039 040 public int loc; 041 042 043 public final int getTag() { return tag; } 044 045 private void postCheck() { 046 boolean goodtag = 047 (tag == TagConstants.EXSURES 048 || tag == TagConstants.ALSO_EXSURES 049 || tag == TagConstants.SIGNALS); 050 Assert.notFalse(goodtag); 051 } 052 053 public int getStartLoc() { return loc; } 054 public int getEndLoc() { return expr.getEndLoc(); } 055 056 057 // Generated boilerplate constructors: 058 059 /** 060 * Construct a raw VarExprModifierPragma whose class invariant(s) have not 061 * yet been established. It is the caller's job to 062 * initialize the returned node's fields so that any 063 * class invariants hold. 064 */ 065 //@ requires I_will_establish_invariants_afterwards; 066 protected VarExprModifierPragma() {} //@ nowarn Invariant,NonNullInit; 067 068 069 // Generated boilerplate methods: 070 071 public final int childCount() { 072 return 2; 073 } 074 075 public final Object childAt(int index) { 076 /*throws IndexOutOfBoundsException*/ 077 if (index < 0) 078 throw new IndexOutOfBoundsException("AST child index " + index); 079 int indexPre = index; 080 081 int sz; 082 083 if (index == 0) return this.arg; 084 else index--; 085 086 if (index == 0) return this.expr; 087 else index--; 088 089 throw new IndexOutOfBoundsException("AST child index " + indexPre); 090 } //@ nowarn Exception; 091 092 public final String toString() { 093 return "[VarExprModifierPragma" 094 + " tag = " + this.tag 095 + " arg = " + this.arg 096 + " expr = " + this.expr 097 + " loc = " + this.loc 098 + "]"; 099 } 100 101 public final void accept(javafe.ast.Visitor v) { 102 if (v instanceof Visitor) ((Visitor)v).visitVarExprModifierPragma(this); 103 } 104 105 public final Object accept(javafe.ast.VisitorArgResult v, Object o) { 106 if (v instanceof VisitorArgResult) return ((VisitorArgResult)v).visitVarExprModifierPragma(this, o); else return null; 107 } 108 109 public void check() { 110 this.arg.check(); 111 this.expr.check(); 112 postCheck(); 113 } 114 115 //@ ensures \result != null; 116 public static VarExprModifierPragma make(int tag, /*@ non_null @*/ GenericVarDecl arg, /*@ non_null @*/ Expr expr, int loc) { 117 //@ set I_will_establish_invariants_afterwards = true; 118 VarExprModifierPragma result = new VarExprModifierPragma(); 119 result.tag = tag; 120 result.arg = arg; 121 result.expr = expr; 122 result.loc = loc; 123 return result; 124 } 125 }