// Return ---
// Exp e;
public IrStmt visit(AstReturn n)
{
if (n.e == null)
return new IrReturn();
else
return new IrReturn(n.e.accept(this));
}
public void visit(AstReturn n)
{
}
/* throws ParseException */
/* final */
public static AstStmt astStmt()
{
AstExp e1, e2; AstStmt s, s1, s2; AstExpList el; AstStmtList sl;
jj_consume_token(AstRegExpId.kw56);
switch ((jj_ntk == AstRegExpId.UNDEFINED)?jj_ntk_fn():jj_ntk) {
case AstRegExpId.kwBlock:
jj_consume_token(AstRegExpId.kwBlock);
sl = astStmtList();
s = new AstBlock(sl);
break;
case AstRegExpId.kwAssign:
jj_consume_token(AstRegExpId.kwAssign);
e1 = astExp();
e2 = astExp();
s = new AstAssign(e1,e2);
break;
case AstRegExpId.kwCallStmt:
jj_consume_token(AstRegExpId.kwCallStmt);
e1 = astExp();
e2 = astExp();
el = astExpList();
s = new AstCallStmt(e1,(AstId)e2,el);
break;
case AstRegExpId.kwIf:
jj_consume_token(AstRegExpId.kwIf);
e1 = astExp();
s1 = astStmt();
s2 = astStmt();
s = new AstIf(e1,s1,s2);
break;
case AstRegExpId.kwWhile:
jj_consume_token(AstRegExpId.kwWhile);
e1 = astExp();
s1 = astStmt();
s = new AstWhile(e1,s1);
break;
case AstRegExpId.kwPrint:
jj_consume_token(AstRegExpId.kwPrint);
e1 = astExp();
s = new AstPrint(e1);
break;
case AstRegExpId.kwReturn:
jj_consume_token(AstRegExpId.kwReturn);
e1 = astExp();
s = new AstReturn(e1);
break;
case AstRegExpId.kwNullStmt:
jj_consume_token(AstRegExpId.kwNullStmt);
s = null;
break;
default:
jj_la1[8] = jj_gen;
jj_consume_token(AstRegExpId.UNDEFINED);
throw new AstParseException();
}
jj_consume_token(AstRegExpId.kw57);
{if (true) return s;}
throw new Error("Missing return statement in function");
}
/* throws Exception */
// Return ---
// Exp e;
public void visit(AstReturn n)
{
if (currMethod == null)
throw new TypeException("Return is outside a method scope");
AstType rt = currMethod.RType();
AstType t = (n.e==null) ? null : n.e.accept(this);
if (t==null)
{
if (rt != null)
throw new TypeException("Return is missing an expr of type " + rt);
}
else if (rt == null)
{
throw new TypeException("Extraneous return expr in void method");
}
else if (!compatible(rt, t))
{
throw new TypeException("Wrong return type for method " + currMethod.Id().s + ": " + t);
}
hasReturn = true;
}
