private static Func <Closure, object> Binary(BinaryExpression binaryExpression,
ConstantExpression[] constantsExprs, ParameterExpression[] localsExprs)
{
var leftFn = Expression(binaryExpression.Left, constantsExprs, localsExprs);
var rightFn = Expression(binaryExpression.Right, constantsExprs, localsExprs);
var opAddition = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_Addition");
var opBitwiseAnd = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_BitwiseAnd");
var opDivision = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_Division");
var opEquality = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_Equality");
var opExclusiveOr = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_ExclusiveOr");
var opGreaterThan = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_GreaterThan");
var opGreaterThanOrEqual = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_GreaterThanOrEqual");
var opLessThan = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_LessThan");
var opLessThanOrEqual = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_LessThanOrEqual");
var opModulus = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_Modulus");
var opMultiply = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_Multiply");
var opBitwiseOr = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_BitwiseOr");
var opSubtraction = WrapBinaryOperation(binaryExpression.Method) ?? WrapBinaryOperation(binaryExpression.Left.Type, "op_Subtraction");
var isNullable = IsNullable(binaryExpression.Left) || IsNullable(binaryExpression.Right);
return(closure =>
{
switch (binaryExpression.NodeType)
{
case ExpressionType.AndAlso:
return closure.Unbox <bool>(leftFn(closure)) && closure.Unbox <bool>(rightFn(closure));
case ExpressionType.OrElse:
return closure.Unbox <bool>(leftFn(closure)) || closure.Unbox <bool>(rightFn(closure));
}
var left = leftFn(closure);
var right = rightFn(closure);
if
(
isNullable &&
(left == null || right == null) &&
binaryExpression.NodeType != ExpressionType.Coalesce &&
binaryExpression.NodeType != ExpressionType.ArrayIndex
)
{
// ReSharper disable once SwitchStatementMissingSomeCases
switch (binaryExpression.NodeType)
{
case ExpressionType.Equal: return closure.Box(left == right);
case ExpressionType.NotEqual: return closure.Box(left != right);
case ExpressionType.GreaterThan:
case ExpressionType.GreaterThanOrEqual:
case ExpressionType.LessThan:
case ExpressionType.LessThanOrEqual: return closure.Box(false);
default: return null;
}
}
switch (binaryExpression.NodeType)
{
case ExpressionType.Add:
case ExpressionType.AddChecked:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opAddition);
case ExpressionType.And:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opBitwiseAnd);
case ExpressionType.ArrayIndex:
return closure.Is <int[]>(right)
? closure.Unbox <Array>(left).GetValue(closure.Unbox <int[]>(right))
: closure.Unbox <Array>(left).GetValue(closure.Unbox <int>(right));
case ExpressionType.Coalesce:
return left ?? right;
case ExpressionType.Divide:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opDivision);
case ExpressionType.Equal:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opEquality);
case ExpressionType.NotEqual:
return closure.Box(closure.Unbox <bool>(Intrinsics.BinaryOperation(closure, left, right, ExpressionType.Equal, opEquality)) == false);
case ExpressionType.ExclusiveOr:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opExclusiveOr);
case ExpressionType.GreaterThan:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opGreaterThan);
case ExpressionType.GreaterThanOrEqual:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opGreaterThanOrEqual);
case ExpressionType.LeftShift:
case ExpressionType.Power:
case ExpressionType.RightShift:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, null);
case ExpressionType.LessThan:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opLessThan);
case ExpressionType.LessThanOrEqual:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opLessThanOrEqual);
case ExpressionType.Modulo:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opModulus);
case ExpressionType.Multiply:
case ExpressionType.MultiplyChecked:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opMultiply);
case ExpressionType.Or:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opBitwiseOr);
case ExpressionType.Subtract:
case ExpressionType.SubtractChecked:
return Intrinsics.BinaryOperation(closure, left, right, binaryExpression.NodeType, opSubtraction);
}
throw new InvalidOperationException(string.Format(Properties.Resources.EXCEPTION_COMPIL_UNKNOWNBINARYEXPRTYPE, binaryExpression.Type));
});
}
