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private DynamicInvoke ( |
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| e | ||
| Résultat | object | |
static bool CheckArgument(ExpressionParser parser, MethodCallExpression methE, bool left, out string hint)
{
int ix1 = left ? 0 : 1;
int ix2 = left ? 1 : 0;
if (typeof (Delegate).IsAssignableFrom(methE.Arguments[ix1].Type))
{
object leftR;
try
{
leftR = parser.DynamicInvoke(Expression.Invoke(methE.Arguments[ix1]));
}
catch (InvalidOperationException) // delegate needs arguments
{
hint = null;
return false;
}
if (Equals(leftR, parser.DynamicInvoke(methE.Arguments[ix2])))
{
hint = string.Format(", but would have been True if you had invoked '{0}'",
NodeFormatter.PrettyPrint(parser.Parse(methE.Arguments[ix1])));
return true;
}
}
hint = null;
return false;
}
public bool TryGetHint(ExpressionParser parser, Expression expression, out string hint)
{
var methE = expression as MethodCallExpression;
if (methE != null)
{
if (methE.Method == ObjectEqualsMethodInfo)
{
var left = parser.DynamicInvoke(methE.Arguments[0]);
var right = parser.DynamicInvoke(methE.Arguments[1]);
if (left is Delegate || right is Delegate)
{
if (CheckArgument(parser, methE, true, out hint))
{
return true;
}
if (CheckArgument(parser, methE, false, out hint))
{
return true;
}
hint = ", this is a suspicious comparison";
return true;
}
}
}
hint = null;
return false;
}
public bool TryGetHint(ExpressionParser parser, Expression expression, out string hint)
{
object left = null;
object right = null;
Type declaringType = null;
var methE = expression as MethodCallExpression;
if (methE != null)
{
if (methE.Method == ObjectEqualsMethodInfo)
{
left = parser.DynamicInvoke(methE.Object);
right = parser.DynamicInvoke(methE.Arguments[0]);
// methE.Method.DeclaringType doesn't work here, it will
// always return the base class method
declaringType = GetDerivedMethodInfo(methE.Object.Type, methE.Method).DeclaringType;
}
}
var binE = expression as BinaryExpression;
if (binE != null && binE.NodeType == ExpressionType.Equal)
{
left = parser.DynamicInvoke(binE.Left);
right = parser.DynamicInvoke(binE.Right);
if (binE.Method != null)
{
declaringType = binE.Method.DeclaringType;
}
else
{
declaringType = typeof (object); // this should never happen - the hints are only called when the assert fails
}
}
if (left != null && left == right)
{
hint = ", type " + ExpressionParser.NameOfType(declaringType) + " has a broken equality implementation (both sides are the same object)";
return true;
}
hint = null;
return false;
}
public bool TryGetHint(ExpressionParser parser, Expression expression, out string hint)
{
var methE = expression as MethodCallExpression;
if (methE != null)
{
if (StringEqualsMethodInfo.Any(x => x == methE.Method))
{
var obj = parser.DynamicInvoke(methE.Object);
var arg = parser.DynamicInvoke(methE.Arguments.First());
var comparison = (StringComparison) (methE.Arguments.Select(parser.DynamicInvoke)
.FirstOrDefault(x => x is StringComparison) ?? StringComparison.CurrentCulture);
hint = HintUtils.GetStringDifferHint((string) obj, (string) arg, GetComparerFromComparison(comparison));
return hint != null;
}
}
hint = null;
return false;
}
public bool TryGetHint(ExpressionParser parser, Expression expression, out string hint)
{
var methE = expression as MethodCallExpression;
if (methE != null)
{
if (methE.Method == ObjectInstanceEqualsMethodInfo)
{
var obj = parser.DynamicInvoke(methE.Object) as IEnumerable;
var arg = parser.DynamicInvoke(methE.Arguments.First()) as IEnumerable;
if (obj != null && arg != null)
{
if (obj.Cast<object>().SequenceEqual(arg.Cast<object>()))
{
hint = ", but would have been True with .SequenceEqual()";
return true;
}
}
}
}
hint = null;
return false;
}
x.GetParameters().Count() == 2); // TODO: equality comparer support
public bool TryGetHint(ExpressionParser parser, Expression expression, out string hint)
{
var methE = expression as MethodCallExpression;
if (methE != null)
{
var typeParams = methE.Method.GetGenericArguments();
if (typeParams.Count() == 1)
{
var instantiatedMethodInfo = SequenceEqualMethodInfo.MakeGenericMethod(typeParams);
if (methE.Method == instantiatedMethodInfo)
{
var left = parser.DynamicInvoke(methE.Arguments[0]);
var right = parser.DynamicInvoke(methE.Arguments[1]);
var enumLeft = ((IEnumerable) left).GetEnumerator();
var enumRight = ((IEnumerable) right).GetEnumerator();
{
int i = 0;
while (enumLeft.MoveNext() && enumRight.MoveNext())
{
if (!Equals(enumLeft.Current, enumRight.Current))
{
hint = string.Format(", enumerables differ at index {0}, {1} != {2}", i,
ObjectFormatter.FormatObject(enumLeft.Current),
ObjectFormatter.FormatObject(enumRight.Current));
return true;
}
++i;
}
}
}
}
}
hint = null;
return false;
}
public bool TryGetHint(ExpressionParser parser, Expression expression, out string hint)
{
if (expression is BinaryExpression && expression.NodeType == ExpressionType.Equal)
{
var be = (BinaryExpression) expression;
object left;
object right;
try
{
left = parser.DynamicInvoke(be.Left);
right = parser.DynamicInvoke(be.Right);
}
catch (TargetInvocationException exception)
{
hint = ObjectFormatter.FormatTargetInvocationException(exception);
return true;
}
return TryGetHint(parser, left, right, out hint);
}
hint = null;
return false;
}
string Parse(ExpressionParser parser, Type enumType, Expression expression)
{
return enumType.Name + "." + Enum.GetName(enumType, parser.DynamicInvoke(expression));
}