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 a try-catch statement. 024 */ 025 026 public class TryCatchStmt extends Stmt 027 { 028 public /*@ non_null @*/ Stmt tryClause; 029 030 public /*@ non_null @*/ CatchClauseVec catchClauses; 031 032 //@ invariant loc != javafe.util.Location.NULL; 033 public int loc; 034 035 036 private void postCheck() { 037 int t = tryClause.getTag(); 038 Assert.notFalse(t != TagConstants.SWITCHLABEL //@ nowarn Pre; 039 && t != TagConstants.CONSTRUCTORINVOCATION 040 && t != TagConstants.VARDECLSTMT); 041 } 042 public int getStartLoc() { return loc; } 043 public int getEndLoc() { 044 if (catchClauses == null || catchClauses.size()<1) 045 return tryClause.getEndLoc(); 046 047 return catchClauses.elementAt(catchClauses.size()-1).getEndLoc(); 048 } 049 050 051 // Generated boilerplate constructors: 052 053 /** 054 * Construct a raw TryCatchStmt whose class invariant(s) have not 055 * yet been established. It is the caller's job to 056 * initialize the returned node's fields so that any 057 * class invariants hold. 058 */ 059 //@ requires I_will_establish_invariants_afterwards; 060 protected TryCatchStmt() {} //@ nowarn Invariant,NonNullInit; 061 062 063 // Generated boilerplate methods: 064 065 public final int childCount() { 066 int sz = 0; 067 if (this.catchClauses != null) sz += this.catchClauses.size(); 068 return sz + 1; 069 } 070 071 public final Object childAt(int index) { 072 /*throws IndexOutOfBoundsException*/ 073 if (index < 0) 074 throw new IndexOutOfBoundsException("AST child index " + index); 075 int indexPre = index; 076 077 int sz; 078 079 if (index == 0) return this.tryClause; 080 else index--; 081 082 sz = (this.catchClauses == null ? 0 : this.catchClauses.size()); 083 if (0 <= index && index < sz) 084 return this.catchClauses.elementAt(index); 085 else index -= sz; 086 087 throw new IndexOutOfBoundsException("AST child index " + indexPre); 088 } //@ nowarn Exception; 089 090 public final String toString() { 091 return "[TryCatchStmt" 092 + " tryClause = " + this.tryClause 093 + " catchClauses = " + this.catchClauses 094 + " loc = " + this.loc 095 + "]"; 096 } 097 098 public final int getTag() { 099 return TagConstants.TRYCATCHSTMT; 100 } 101 102 public final void accept(Visitor v) { v.visitTryCatchStmt(this); } 103 104 public final Object accept(VisitorArgResult v, Object o) {return v.visitTryCatchStmt(this, o); } 105 106 public void check() { 107 super.check(); 108 this.tryClause.check(); 109 for(int i = 0; i < this.catchClauses.size(); i++) 110 this.catchClauses.elementAt(i).check(); 111 postCheck(); 112 } 113 114 //@ requires loc != javafe.util.Location.NULL; 115 //@ ensures \result != null; 116 public static TryCatchStmt make(/*@ non_null @*/ Stmt tryClause, /*@ non_null @*/ CatchClauseVec catchClauses, int loc) { 117 //@ set I_will_establish_invariants_afterwards = true; 118 TryCatchStmt result = new TryCatchStmt(); 119 result.tryClause = tryClause; 120 result.catchClauses = catchClauses; 121 result.loc = loc; 122 return result; 123 } 124 }