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 public class ReturnStmt extends Stmt 023 { 024 public Expr expr; 025 026 //@ invariant loc != javafe.util.Location.NULL; 027 public int loc; 028 029 public int getStartLoc() { return loc; } 030 public int getEndLoc() { 031 if (expr == null) 032 return super.getEndLoc(); 033 034 return expr.getEndLoc(); 035 } 036 037 038 // Generated boilerplate constructors: 039 040 /** 041 * Construct a raw ReturnStmt whose class invariant(s) have not 042 * yet been established. It is the caller's job to 043 * initialize the returned node's fields so that any 044 * class invariants hold. 045 */ 046 //@ requires I_will_establish_invariants_afterwards; 047 protected ReturnStmt() {} //@ nowarn Invariant,NonNullInit; 048 049 050 // Generated boilerplate methods: 051 052 public final int childCount() { 053 return 1; 054 } 055 056 public final Object childAt(int index) { 057 /*throws IndexOutOfBoundsException*/ 058 if (index < 0) 059 throw new IndexOutOfBoundsException("AST child index " + index); 060 int indexPre = index; 061 062 int sz; 063 064 if (index == 0) return this.expr; 065 else index--; 066 067 throw new IndexOutOfBoundsException("AST child index " + indexPre); 068 } //@ nowarn Exception; 069 070 public final String toString() { 071 return "[ReturnStmt" 072 + " expr = " + this.expr 073 + " loc = " + this.loc 074 + "]"; 075 } 076 077 public final int getTag() { 078 return TagConstants.RETURNSTMT; 079 } 080 081 public final void accept(Visitor v) { v.visitReturnStmt(this); } 082 083 public final Object accept(VisitorArgResult v, Object o) {return v.visitReturnStmt(this, o); } 084 085 public void check() { 086 super.check(); 087 if (this.expr != null) 088 this.expr.check(); 089 } 090 091 //@ requires loc != javafe.util.Location.NULL; 092 //@ ensures \result != null; 093 public static ReturnStmt make(Expr expr, int loc) { 094 //@ set I_will_establish_invariants_afterwards = true; 095 ReturnStmt result = new ReturnStmt(); 096 result.expr = expr; 097 result.loc = loc; 098 return result; 099 } 100 }