protected override Expression VisitIf(IFCommand ifx)
{
var test =
Expression.Condition(
ifx.Check,
ifx.IfTrue,
ifx.IfFalse != null
? ifx.IfFalse
: ifx.IfTrue.Type == typeof(int)
? (Expression)Expression.Property(this.executor, "RowsAffected")
: (Expression)Expression.Constant(TypeHelper.GetDefault(ifx.IfTrue.Type), ifx.IfTrue.Type));
return(this.Visit(test));
}
protected override Expression VisitIf(IFCommand ifx)
{
if (!this.Language.AllowsMultipleCommands)
{
return(base.VisitIf(ifx));
}
this.Write("IF ");
this.Visit(ifx.Check);
this.WriteLine(Indentation.Same);
this.Write("BEGIN");
this.WriteLine(Indentation.Inner);
this.VisitStatement(ifx.IfTrue);
this.WriteLine(Indentation.Outer);
if (ifx.IfFalse != null)
{
this.Write("END ELSE BEGIN");
this.WriteLine(Indentation.Inner);
this.VisitStatement(ifx.IfFalse);
this.WriteLine(Indentation.Outer);
}
this.Write("END");
return(ifx);
}
protected override Expression VisitIf(IFCommand ifx)
{
if (!this.Dialect.SupportMultipleCommands)
{
return(base.VisitIf(ifx));
}
this.Append("IF ");
this.Visit(ifx.Check);
this.AppendLine(Indentation.Same);
this.Append("BEGIN");
this.AppendLine(Indentation.Inner);
this.VisitStatement(ifx.IfTrue);
this.AppendLine(Indentation.Outer);
if (ifx.IfFalse != null)
{
this.Append("END ELSE BEGIN");
this.AppendLine(Indentation.Inner);
this.VisitStatement(ifx.IfFalse);
this.AppendLine(Indentation.Outer);
}
this.Append("END");
return(ifx);
}
protected override Expression VisitIf(IFCommand ifx)
{
throw new NotSupportedException();
}
protected override Expression VisitIf(IFCommand ifx)
{
if (!this.Language.AllowsMultipleCommands)
{
return base.VisitIf(ifx);
}
this.Write("IF ");
this.Visit(ifx.Check);
this.WriteLine(Indentation.Same);
this.Write("THEN BEGIN");
this.WriteLine(Indentation.Inner);
this.VisitStatement(ifx.IfTrue);
this.WriteLine(Indentation.Outer);
if (ifx.IfFalse != null)
{
this.Write("ELSE BEGIN");
this.WriteLine(Indentation.Inner);
this.VisitStatement(ifx.IfFalse);
this.WriteLine(Indentation.Outer);
}
this.Write("END IF;");
return ifx;
}
protected override Expression VisitIf(IFCommand ifx)
{
if (!this.Dialect.SupportMultipleCommands)
{
return base.VisitIf(ifx);
}
this.Append("IF ");
this.Visit(ifx.Check);
this.AppendLine(Indentation.Same);
this.Append("BEGIN");
this.AppendLine(Indentation.Inner);
this.VisitStatement(ifx.IfTrue);
this.AppendLine(Indentation.Outer);
if (ifx.IfFalse != null)
{
this.Append("END ELSE BEGIN");
this.AppendLine(Indentation.Inner);
this.VisitStatement(ifx.IfFalse);
this.AppendLine(Indentation.Outer);
}
this.Append("END");
return ifx;
}
protected virtual bool CompareIf(IFCommand x, IFCommand y)
{
return this.Compare(x.Check, y.Check) && this.Compare(x.IfTrue, y.IfTrue) && this.Compare(x.IfFalse, y.IfFalse);
}
protected virtual Expression VisitIf(IFCommand ifx)
{
var check = this.Visit(ifx.Check);
var ifTrue = this.Visit(ifx.IfTrue);
var ifFalse = this.Visit(ifx.IfFalse);
return this.UpdateIf(ifx, check, ifTrue, ifFalse);
}
protected IFCommand UpdateIf(IFCommand ifx, Expression check, Expression ifTrue, Expression ifFalse)
{
if (check != ifx.Check || ifTrue != ifx.IfTrue || ifFalse != ifx.IfFalse)
{
return new IFCommand(check, ifTrue, ifFalse);
}
return ifx;
}
private bool CompareIf(IFCommand x, IFCommand y)
{
return this.Compare(x.Check, y.Check) && this.Compare(x.IfTrue, y.IfTrue) && this.Compare(x.IfFalse, y.IfFalse);
}
/// <summary>
/// Visits if.
/// </summary>
/// <param name="ifx">The ifx.</param>
/// <returns></returns>
protected override Expression VisitIf(IFCommand ifx)
{
throw new NotSupportedException();
}
