protected override Expression VisitConditional(ConditionalExpression node)
{
if (node.IfFalse.NodeType != ExpressionType.Throw)
{
return base.VisitConditional(node);
}
Console.WriteLine(node.ToString());
Expression<Func<Object>> dummyFalseResult = () => DUMMY_RESULT;
var invokeDummyFalseResult = Expression.Invoke(dummyFalseResult, null);
return Expression.Condition(node.Test, node.IfTrue, invokeDummyFalseResult);
}
/// <summary>
/// We only support a sub-class of expressions for now - so we'd better make sure we are protected!
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
protected override Expression VisitConditional(ConditionalExpression expression)
{
// We can support complex sub-expressions so long as they don't leak out of the
// comparison.
if (expression.Type.IsClass
&& (
CheckForSubQueries.CheckExpression(expression.IfFalse)
|| CheckForSubQueries.CheckExpression(expression.IfTrue))
)
{
throw new NotSupportedException(string.Format("Complex true/false clauses in a conditional expression are not supported: '{0}'", expression.ToString()));
}
// If this is a class as a result, then we can't do much extra processing here. So skip.
if (expression.Type.IsClass)
{
return base.VisitConditional(expression);
}
// Run the code for the test, and then create the if/then/else that will support it.
var testExpression = base.Visit(expression.Test);
var testBoolInCode = DeclarableParameter.CreateDeclarableParameterExpression(typeof(bool));
GeneratedCode.Add(testBoolInCode);
GeneratedCode.Add(new Statements.StatementAssign(testBoolInCode,
ExpressionToCPP.GetExpression(testExpression, GeneratedCode, CodeContext, MEFContainer)
));
// The result
var conditionalResult = DeclarableParameter.CreateDeclarableParameterExpression(expression.Type);
GeneratedCode.Add(conditionalResult);
// Do the if true statement
var topScope = GeneratedCode.CurrentScope;
GeneratedCode.Add(new Statements.StatementFilter(testBoolInCode));
var iftrueExpression = Visit(expression.IfTrue);
GeneratedCode.Add(new Statements.StatementAssign(conditionalResult, ExpressionToCPP.GetExpression(iftrueExpression, GeneratedCode, CodeContext, MEFContainer)));
GeneratedCode.CurrentScope = topScope;
// Do the if false statement
GeneratedCode.Add(new Statements.StatementFilter(ExpressionToCPP.GetExpression(Expression.Not(testBoolInCode), GeneratedCode, CodeContext, MEFContainer)));
var ifFalseExpression = Visit(expression.IfFalse);
GeneratedCode.Add(new Statements.StatementAssign(conditionalResult, ExpressionToCPP.GetExpression(ifFalseExpression, GeneratedCode, CodeContext, MEFContainer)));
GeneratedCode.CurrentScope = topScope;
// Consider this expression now transformed, so return the result, not
// the conditional expression itself.
return conditionalResult;
}
internal override Expression VisitConditional(ConditionalExpression c)
{
var nullCheck = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (nullCheck.Match)
{
this.Visit(nullCheck.AssignExpression);
return c;
}
if (ClientType.CheckElementTypeIsEntity(c.Test.Type) || ClientType.CheckElementTypeIsEntity(c.IfTrue.Type) || ClientType.CheckElementTypeIsEntity(c.IfFalse.Type)
|| IsCollectionProducingExpression(c.Test) || IsCollectionProducingExpression(c.IfTrue) || IsCollectionProducingExpression(c.IfFalse))
{
throw new NotSupportedException(Strings.ALinq_ExpressionNotSupportedInProjection(this.type, c.ToString()));
}
return base.VisitConditional(c);
}
internal override Expression VisitConditional(ConditionalExpression c)
{
var nullCheck = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (nullCheck.Match)
{
this.Visit(nullCheck.AssignExpression);
return c;
}
throw new NotSupportedException(Strings.ALinq_ExpressionNotSupportedInProjectionToEntity(this.type, c.ToString()));
}
internal override Expression VisitConditional(ConditionalExpression c)
{
var nullCheck = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (nullCheck.Match)
{
this.Visit(nullCheck.AssignExpression);
return c;
}
if (CommonUtil.IsClientType(c.Test.Type) || CommonUtil.IsClientType(c.IfTrue.Type) || CommonUtil.IsClientType(c.IfFalse.Type))
{
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, SR.ALinqExpressionNotSupportedInProjection, this.type, c.ToString()));
}
return base.VisitConditional(c);
}
internal override Expression VisitConditional(ConditionalExpression c)
{
ResourceBinder.PatternRules.MatchNullCheckResult result = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (result.Match)
{
this.Visit(result.AssignExpression);
return c;
}
if (((ClientTypeUtil.TypeOrElementTypeIsEntity(c.Test.Type) || ClientTypeUtil.TypeOrElementTypeIsEntity(c.IfTrue.Type)) || (ClientTypeUtil.TypeOrElementTypeIsEntity(c.IfFalse.Type) || ProjectionAnalyzer.IsCollectionProducingExpression(c.Test))) || (ProjectionAnalyzer.IsCollectionProducingExpression(c.IfTrue) || ProjectionAnalyzer.IsCollectionProducingExpression(c.IfFalse)))
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjection(this.type, c.ToString()));
}
return base.VisitConditional(c);
}
internal override Expression VisitConditional(ConditionalExpression c)
{
ResourceBinder.PatternRules.MatchNullCheckResult result = ResourceBinder.PatternRules.MatchNullCheck(this.box.ParamExpressionInScope, c);
if (!result.Match)
{
throw new NotSupportedException(System.Data.Services.Client.Strings.ALinq_ExpressionNotSupportedInProjectionToEntity(this.type, c.ToString()));
}
this.Visit(result.AssignExpression);
return c;
}