protected override Expression VisitConstant(ConstantExpression constantExpression)
{
ConstantExpression current;
if (!this.TryGetCurrent(constantExpression, out current))
{
return(constantExpression);
}
if ((this.options & SqlExpressionComparerOptions.IgnoreConstants) != 0)
{
this.result &= constantExpression.Type == current.Type;
return(constantExpression);
}
if (!(this.result &= (current.Type == constantExpression.Type)))
{
return(constantExpression);
}
if (typeof(Expression).IsAssignableFrom(current.Type))
{
this.result &= SqlExpressionComparer.Equals((Expression)current.Value, (Expression)constantExpression.Value, options);
return(constantExpression);
}
else
{
this.result &= Object.Equals(current.Value, constantExpression.Value);
return(constantExpression);
}
}
public static bool Equals(Expression left, Expression right, bool ignoreConstantPlaceholderValues)
{
var visitor = new SqlExpressionComparer(right);
visitor.ignoreConstantPlaceholderValues = ignoreConstantPlaceholderValues;
visitor.Visit(left);
return(visitor.result);
}
public static bool Equals(Expression left, Expression right, SqlExpressionComparerOptions options)
{
var visitor = new SqlExpressionComparer(right)
{
options = options
};
visitor.Visit(left);
return(visitor.result);
}
public static bool Equals(Expression left, Expression right, SqlExpressionComparerOptions options)
{
if (ReferenceEquals(left, right))
{
return(true);
}
if (left == null || right == null)
{
return(false);
}
var visitor = new SqlExpressionComparer(right)
{
options = options
};
visitor.Visit(left);
return(visitor.result);
}
public bool Equals(Expression x, Expression y)
{
return(SqlExpressionComparer.Equals(x, y, options));
}
