/// <summary>
/// Adds to expression.
/// </summary>
/// <param name="factory">
/// The factory.
/// </param>
/// <param name="expression">
/// To.
/// </param>
/// <param name="sign">
/// The sign.
/// </param>
/// <returns>
/// </returns>
private static ICSharpExpression AddToExpression(CSharpElementFactory factory, ICSharpExpression expression, char sign)
{
var sign2 = sign == '-' ? '+' : '-';
var text = expression.GetText();
if (text.StartsWith("(") && text.EndsWith(")"))
{
text = text.Substring(1, text.Length - 2);
}
var match = Regex.Match(text, "\\" + sign2 + "\\s*1\\s*$");
if (match.Success)
{
text = text.Substring(0, text.Length - match.Value.Length).Trim();
if (text.StartsWith("(") && text.EndsWith(")"))
{
text = text.Substring(1, text.Length - 2);
}
}
else
{
if (expression is IBinaryExpression)
{
text = "(" + text + ") " + sign + " 1";
}
else
{
text += sign + " 1";
}
}
text = text.Trim();
var result = factory.CreateExpression(text);
if (result.IsConstantValue())
{
result = factory.CreateExpressionByValue(result.ConstantValue);
}
return result;
}
