mcs/class/System.Core/System.Linq.Expressions/InvocationExpression.cs

   1 using System.Text;
   2 using System.Collections.ObjectModel;
   3
   4 namespace System.Linq.Expressions
   5 {
   6     public sealed class InvocationExpression : Expression
   7     {
   8         #region .ctor
   9         internal InvocationExpression(Expression lambda, Type returnType, ReadOnlyCollection<Expression> arguments)
  10             : base(ExpressionType.Invoke, returnType)
  11         {
  12             this.lambda = lambda;
  13             this.arguments = arguments;
  14         }
  15         #endregion
  16
  17         #region Fields
  18         private Expression lambda;
  19         private ReadOnlyCollection<Expression> arguments;
  20         #endregion
  21
  22         #region Properties
  23         public ReadOnlyCollection<Expression> Arguments
  24         {
  25             get { return arguments; }
  26         }
  27
  28         public Expression Expression
  29         {
  30             get { return lambda; }
  31         }
  32         #endregion
  33
  34         #region Internal Methods
  35         internal override void BuildString(StringBuilder builder)
  36         {
  37             builder.Append("invoke(");
  38
  39             // build the lamba expression first
  40             lambda.BuildString(builder);
  41
  42             int argc = arguments.Count;
  43             for (int i = 0; i < argc; i++)
  44             {
  45                 arguments[i].BuildString(builder);
  46                 if (i < argc - 1)
  47                     builder.Append(", ");
  48             }
  49
  50             builder.Append(")");
  51         }
  52         #endregion
  53     }
  54 }