public void EvaluateSimpleNewExpression()
{
IExpression expression = new NewExpression("System.Data.DataSet", null);
object result = expression.Evaluate(new BindingEnvironment());
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(System.Data.DataSet));
}
public void EvaluateNewExpressionWithAliasedType()
{
IExpression expression = new NewExpression("Channel", null);
BindingEnvironment environment = new BindingEnvironment();
environment.SetValue("Channel", typeof(Channel));
object result = expression.Evaluate(environment);
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(Channel));
}
public void EvaluateNewExpressionWithArguments()
{
IExpression expression = new NewExpression("System.IO.DirectoryInfo", new IExpression[] { new ConstantExpression(".") });
object result = expression.Evaluate(new BindingEnvironment());
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(System.IO.DirectoryInfo));
DirectoryInfo di = (DirectoryInfo)result;
DirectoryInfo current = new DirectoryInfo(".");
Assert.AreEqual(current.FullName, di.FullName);
}
// TODO Refactor
private IExpression ParseNewExpression()
{
this.lexer.NextToken();
IExpression expression;
bool isDynamic = false;
if (this.TryPeekName())
{
string typename = this.ParseQualifiedName();
if (this.TryParse(TokenType.Separator, "["))
return this.ParseNewArrayExpression(typename);
ICollection<IExpression> arguments = this.ParseArgumentList();
expression = new NewExpression(typename, arguments);
if (!this.TryParse(TokenType.Separator, "{"))
return expression;
}
else
{
isDynamic = true;
expression = new NewExpression("AjLanguage.Language.DynamicObject", null);
}
this.Parse(TokenType.Separator, "{");
List<string> names = new List<string>();
List<IExpression> expressions = new List<IExpression>();
bool wasMember = false;
while (!this.TryParse(TokenType.Separator, "}"))
{
if (names.Count > 0 && !wasMember)
this.Parse(TokenType.Separator, ",");
if (isDynamic && this.TryParse(TokenType.Name, "var", "function", "sub"))
{
wasMember = true;
Token token = this.lexer.NextToken();
if (token.Value == "var")
this.ParseMemberVariable(names, expressions);
else if (token.Value == "function" || token.Value == "sub")
this.ParseMemberMethod(names, expressions, false);
else
throw new UnexpectedTokenException(token);
}
else
{
wasMember = false;
names.Add(this.ParseName());
this.Parse(TokenType.Operator, "=");
expressions.Add(this.ParseExpression());
}
}
this.Parse(TokenType.Separator, "}");
return new MultipleSetExpression(expression, names.ToArray(), expressions);
}