| public static Property ( Expression instance, PropertyInfo indexer ) : IndexExpression | ||
| instance | Expression | The object to which the property belongs. If the property is static/shared, it must be null. |
| indexer | PropertyInfo | The |
| return | IndexExpression | |
private static Expression <Func <T, bool> > PrimaryKeyEquals(PropertyInfo property, int value)
{
var param = Expression.Parameter(typeof(T));
var body = Expression.Equal(Expression.Property(param, property), Expression.Constant(value));
return(Expression.Lambda <Func <T, bool> >(body, param));
}
public void TestWhereComparison()
{
// Partial LINQ expression (x => x.Number1)
var parameter = LinqExpression.Parameter(typeof(NumbersModel), "x");
var n1 = LinqExpression.Property(parameter, "Number1");
var l3 = new Func <int, bool>(n => n < 3);
var le3 = new Func <int, bool>(n => n <= 3);
var g6 = new Func <int, bool>(n => n > 6);
var ge6 = new Func <int, bool>(n => n >= 6);
var e7 = new Func <int, bool>(n => n == 7);
var ne7 = new Func <int, bool>(n => n != 7);
var cases = new[] {
Tuple.Create((LinqExpression)LinqExpression.LessThan(n1, LinqExpression.Constant(3)),
(Func <NumbersModel, object, bool>)TestWhereCompareValidator, (object)l3, parameter),
Tuple.Create((LinqExpression)LinqExpression.LessThanOrEqual(n1, LinqExpression.Constant(3)),
(Func <NumbersModel, object, bool>)TestWhereCompareValidator, (object)le3, parameter),
Tuple.Create((LinqExpression)LinqExpression.GreaterThan(n1, LinqExpression.Constant(6)),
(Func <NumbersModel, object, bool>)TestWhereCompareValidator, (object)g6, parameter),
Tuple.Create((LinqExpression)LinqExpression.GreaterThanOrEqual(n1, LinqExpression.Constant(6)),
(Func <NumbersModel, object, bool>)TestWhereCompareValidator, (object)ge6, parameter),
Tuple.Create((LinqExpression)LinqExpression.Equal(n1, LinqExpression.Constant(7)),
(Func <NumbersModel, object, bool>)TestWhereCompareValidator, (object)e7, parameter),
Tuple.Create((LinqExpression)LinqExpression.NotEqual(n1, LinqExpression.Constant(7)),
(Func <NumbersModel, object, bool>)TestWhereCompareValidator, (object)ne7, parameter)
};
LoadModelNumbers(10);
Db.Count.Should().Be(10);
RunTestWithNumbers(new[] { 2, 3, 4, 5, 1, 9 }, cases);
}
private void BuildWithSubquery()
{
var criteria = (CriteriaImpl)MainQuery.UnderlyingCriteria;
var session = (SessionImpl)criteria.Session;
var metaData = session.SessionFactory.GetClassMetadata(typeof(TRoot));
var idName = metaData.IdentifierPropertyName; //TODO: multiple props
var pe = Expression.Parameter(typeof(TRoot));
var idExprBody = Expression.Property(pe, typeof(TRoot).GetProperty(idName));
var expr = Expression.Lambda(idExprBody, pe);
var mainCloned = MainQuery.Clone();
var projectionList = new List <IProjection>();
projectionList.Add(ExpressionProcessor.FindMemberProjection(expr.Body).AsProjection());
mainCloned.UnderlyingCriteria.SetProjection(projectionList.ToArray());
var tree = new QueryRelationTree();
foreach (var pathExpr in Includes)
{
tree.AddNode(pathExpr);
}
foreach (var pair in tree.DeepFirstSearch())
{
var query = session.QueryOver <TRoot>();
//Add a SubQuery
query.And(Subqueries.PropertyIn(idName, ((QueryOver <TRoot, TRoot>)mainCloned).DetachedCriteria));
CopyCriteriaValues(criteria, query);
FillSubQuery(pair.Value, query, criteria);
query.Future();
}
}
/// <summary>
/// Creates two-way binding between a property in the target processor view model class and
/// its represented property in the settings manager.
/// </summary>
/// <typeparam name="TParameter">The type of the property parameter.</typeparam>
/// <typeparam name="TTargetClass">The type of the target class.</typeparam>
/// <param name="targetClassName">The name of the target class.</param>
/// <param name="targetPropertyName">The name of the property.</param>
/// <param name="settingsManager">The calling instance of the SettingsManager class.</param>
public static void BindSettingsProperty <TParameter, TTargetClass>(
string targetClassName,
string targetPropertyName,
SettingsManager settingsManager)
{
var propertyInfo = typeof(ViewModels.MainViewModel).GetProperty(targetClassName);
var targetClassInstance = (TTargetClass)propertyInfo.GetGetMethod().Invoke(settingsManager.MainViewModelRef, null);
ParameterExpression targetParameter = LExpression.Parameter(typeof(SettingsManager), "x");
MemberExpression mainVMRefExp = LExpression.Property(targetParameter, "MainViewModelRef");
MemberExpression viewModelExp = LExpression.Property(mainVMRefExp, targetClassName);
MemberExpression targetPropertyExp = LExpression.Property(viewModelExp, targetPropertyName);
Expression <Func <SettingsManager, TParameter> > targetExp = LExpression.Lambda <Func <SettingsManager, TParameter> >(targetPropertyExp, new ParameterExpression[] { targetParameter });
Action <SettingsManager, TParameter> targetSetterAction = CreateSetterByName <SettingsManager, TParameter>(targetPropertyName);
settingsManager.DisposeCollection.Add(
settingsManager.WhenAnyValue(targetExp)
.Where(_ => !settingsManager.IsLoading)
.Subscribe(delegate(TParameter x)
{
targetSetterAction(settingsManager, x);
}));
MemberExpression settingsPropertyExp = LExpression.Property(targetParameter, targetPropertyName);
Expression <Func <SettingsManager, TParameter> > settingsExp = LExpression.Lambda <Func <SettingsManager, TParameter> >(settingsPropertyExp, new ParameterExpression[] { targetParameter });
Action <TTargetClass, TParameter> settingsSetterAction = CreateSetterByName <TTargetClass, TParameter>(targetPropertyName);
settingsManager.DisposeCollection.Add(
settingsManager.WhenAnyValue(settingsExp)
.Subscribe(delegate(TParameter x)
{
settingsSetterAction(targetClassInstance, x);
}));
}
public static Expression Count(Expression arg)
{
CheckIsEnumerable(arg);
var count = arg.Type.GetProperty("Count");
return(new Expression(LinqExpression.Property(arg, count)));
}
public static Expression Call(ProcedureCall call)
{
if (ReferenceEquals(call, null))
{
throw new ArgumentNullException(nameof(call));
}
var services = Services.Instance;
var procedure = services.GetProcedureSignature(call);
if (!procedure.HasReturnType)
{
throw new InvalidOperationException(
"Cannot use a procedure that does not return a value.");
}
var arguments = services.GetArguments(procedure, call.Arguments);
var servicesExpr = LinqExpression.Constant(services);
var executeCallMethod = typeof(Services).GetMethod(
"ExecuteCall", new[] { typeof(Scanner.ProcedureSignature), typeof(object[]) });
var procedureExpr = LinqExpression.Constant(procedure);
var argumentsExpr = LinqExpression.Constant(arguments);
var result = LinqExpression.Call(
servicesExpr, executeCallMethod,
new[] { procedureExpr, argumentsExpr });
var value = LinqExpression.Convert(
LinqExpression.Property(result, "Value"), procedure.ReturnType);
return(new Expression(value));
}
private LambdaExpression toDictLambda(Type from, Type to)
{
var valueType = recordCreator.GetValueType(to);
var recType = typeof(IRecord <>).MakeGenericType(valueType);
var set = recType.GetTypeInfo().GetDeclaredMethod(nameof(IRecord <object> .SetValue));
var input = Ex.Parameter(from, "input");
var tmp = Ex.Parameter(typeof(ConversionResult <>).MakeGenericType(valueType), "tmp");
var res = Ex.Parameter(typeof(IDictionary <,>).MakeGenericType(typeof(string), valueType), "res");
var rec = Ex.Parameter(recType, "rec");
var getters = GetReadablePropertiesForType(from);
var converters = getters.Select(g => Ref.GetLambda(g.PropertyType, valueType));
var end = Ex.Label(typeof(ConversionResult <>).MakeGenericType(to));
var block = Ex.Block(new[] { tmp, res, rec },
Ex.Assign(res, Ex.New(GetParameterlessConstructor(to))),
Ex.Assign(rec, recordCreator.Creator(to).ApplyTo(res)),
Ex.IfThen(Ex.MakeBinary(ExpressionType.Equal, rec, Ex.Default(rec.Type)), Ex.Goto(end, NoResult(to))),
Ex.Block(getters.Zip(converters, (g, c) => new { g, c })
.Select(x =>
Ex.Block(
Ex.Assign(tmp, x.c.ApplyTo(Ex.Property(input, x.g))),
Ex.IfThenElse(Ex.Property(tmp, nameof(IConversionResult.IsSuccessful)),
Ex.Call(rec, set, Ex.Constant(x.g.Name), Ex.Property(tmp, nameof(IConversionResult.Result))),
Ex.Goto(end, NoResult(to)))))),
Ex.Label(end, Result(to, Ex.Convert(res, to))));
return(Ex.Lambda(block, input));
}
/// <summary>
/// Create a lambda to receive a property value
/// </summary>
/// <param name="property"></param>
/// <returns></returns>
private Delegate CreateValueGetter(PropertyInfo property)
{
ParameterExpression parameter = Expression.Parameter(GetType(), "i");
UnaryExpression cast = Expression.TypeAs(Expression.Property(parameter, property), typeof(object));
return(Expression.Lambda(cast, parameter).Compile());
}
public static IQueryable <TEntity> EagerFetchAll <TEntity>(this IQueryable <TEntity> query)
{
// hack the session reference out of the provider - or is
// there a better way to do this?
//IStatelessSession session = (IStatelessSession)query.Provider.GetType().GetProperty("Session").GetValue(query.Provider);
//ISession session = (ISession)query.Provider.GetType()
// .GetProperty("Session", System.Reflection.BindingFlags.Instance
// | System.Reflection.BindingFlags.NonPublic)
// .GetValue(query.Provider);
var entityType = typeof(TEntity);
var sessionFactory = Ioc.Create <ISessionFactory>();
IClassMetadata metaData = sessionFactory.GetClassMetadata(entityType);
for (int i = 0; i < metaData.PropertyNames.Length; i++)
{
global::NHibernate.Type.IType propType = metaData.PropertyTypes[i];
// get eagerly mapped associations to other entities
if (propType.IsAssociationType && !metaData.PropertyLaziness[i])
{
ParameterExpression par = Expression.Parameter(entityType, "p");
Expression propExp = Expression.Property(par, metaData.PropertyNames[i]);
Type relatedType = null;
LambdaExpression lambdaExp;
string methodName;
if (propType.ReturnedClass.IsGenericCollection())
{
relatedType = propType.ReturnedClass.GetGenericArguments()[0];
var funcType = typeof(Func <,>).MakeGenericType(entityType, typeof(IEnumerable <>).MakeGenericType(relatedType));
lambdaExp = Expression.Lambda(funcType, propExp, par);
methodName = "FetchMany";
}
else
{
relatedType = propType.ReturnedClass;
lambdaExp = Expression.Lambda(propExp, par);
methodName = "Fetch";
}
var fetchManyMethodImpl = typeof(EagerFetchingExtensionMethods).GetMethod(methodName).MakeGenericMethod(entityType, relatedType);
Expression callExpr = Expression.Call(null,
fetchManyMethodImpl,
// first parameter is the query, second is property access expression
query.Expression, lambdaExp
);
LambdaExpression expr = Expression.Lambda(callExpr, par);
Type fetchGenericType = typeof(NhFetchRequest <,>).MakeGenericType(entityType, propType.ReturnedClass);
query = (IQueryable <TEntity>)Activator.CreateInstance(fetchGenericType, query.Provider, callExpr);
}
}
return(query);
}
// Pseudocode:
//string input =>
//{
// R result = 0;
// for (int i = input.Length - 1; i >= 0; i--)
// {
// result <<= 6;
// var m = _invMap[input[i]];
// if (m == 0xff)
// return default(ConversionResult<R>);
// result += m;
// }
// return new ConversionResult<R>(result);
//}
private LambdaExpression fromLambda(Type to)
{
var stringthis = typeof(string).GetTypeInfo().DeclaredProperties.First(p => p.GetIndexParameters().Length == 1 && p.GetIndexParameters()[0].ParameterType == typeof(int));
var input = Ex.Parameter(typeof(string), "input");
var result = Ex.Parameter(to, "result");
var i = Ex.Parameter(typeof(int), "i");
var m = Ex.Parameter(typeof(byte), "m");
var loopstart = Ex.Label("loopstart");
var end = Ex.Label(typeof(ConversionResult <>).MakeGenericType(to), "end");
var loop = Ex.Block(
Ex.Label(loopstart),
Ex.IfThen(Ex.MakeBinary(ExpressionType.LessThan, i, Ex.Constant(0)),
Ex.Goto(end, Result(to, result))),
Ex.LeftShiftAssign(result, Ex.Constant(6)),
Ex.Assign(m, Ex.ArrayIndex(Ex.Constant(_invMap), Ex.Convert(Ex.MakeIndex(input, stringthis, new[] { i }), typeof(int)))),
Ex.IfThen(Ex.MakeBinary(ExpressionType.Equal, m, Ex.Constant((byte)0xff)),
Ex.Goto(end, NoResult(to))),
Ex.AddAssign(result, Ex.Convert(m, result.Type)),
Ex.PostDecrementAssign(i),
Ex.Goto(loopstart));
var block = Ex.Block(new[] { result, i, m },
Ex.Assign(result, Ex.Convert(Ex.Constant(0), to)),
Ex.Assign(i, Ex.MakeBinary(ExpressionType.Subtract, Ex.Property(input, nameof(string.Length)), Ex.Constant(1))),
loop,
Ex.Label(end, NoResult(to)));
return(Ex.Lambda(block, input));
}
/// <summary>
/// Filters a sequence of values based on a fulltext search predicate
/// </summary>
/// <typeparam name="T">Any type</typeparam>
/// <param name="source">The source - some IQueryable object.</param>
/// <param name="text">The text - meaning of the search</param>
/// <param name="options">The options for full-text search</param>
/// <returns></returns>
public static IQueryable <T> FullTextSearchQuery <T>(this IQueryable <T> source, string text, FullTextSearchOptions options = null)
{
var pe = Exp.Parameter(typeof(T), "d");
var predicateBody = CreateSubExpression(pe, typeof(T), text, options, isQueriable: true);
if (predicateBody != null)
{
var whereExp = Exp.Lambda <Func <T, bool> >(predicateBody, new ParameterExpression[] { pe });
source = source.Where(whereExp);
}
//Order by Expression
if (options == null)
{
return(source);
}
var orderByProperty = options.OrderBy;
if (string.IsNullOrEmpty(orderByProperty))
{
orderByProperty = typeof(T).GetProperties().First().Name;
}
var property = Exp.Property(pe, orderByProperty);
var lambda = Exp.Lambda(property, pe);
var method = options.IsDescendingOrder ? "OrderByDescending" : "OrderBy";
var orderByExp = Exp.Call(typeof(Queryable), method, new[] { typeof(T), property.Type }, source.Expression, lambda);
source = source.Provider.CreateQuery <T>(orderByExp) as IOrderedQueryable <T>;
return(source);
}
private LambdaExpression fromEnumerableLambda(Type from)
{
var input = Ex.Parameter(from, "input");
var eType = from.GetTypeInfo().ImplementedInterfaces
.Where(i => i.GenericTypeArguments.Length == 1 && i.GetGenericTypeDefinition() == typeof(IEnumerable <>))
.Select(i => i.GenericTypeArguments[0]).SingleOrDefault()
?? from.GetTypeInfo().GenericTypeArguments[0];
var res = Ex.Parameter(typeof(string), "res");
var result = Ex.Block(new[] { res },
Ex.Assign(res, Ex.Call((from mi in typeof(string).GetTypeInfo().GetDeclaredMethods(nameof(string.Join))
where mi.GetGenericArguments().Length == 1
let par = mi.GetParameters()
where par.Length == 2 &&
par[0].ParameterType == typeof(string) &&
par[1].ParameterType == typeof(IEnumerable <>).MakeGenericType(mi.GetGenericArguments()[0])
select mi).Single().MakeGenericMethod(eType),
Ex.Constant(Separators[0].ToString()), input)),
Ex.Condition(Ex.MakeBinary(Et.Equal, Ex.Property(res, nameof(string.Length)), Ex.Constant(0)),
NoResult(typeof(string)),
Result(typeof(string), res)));
var block = Ex.Condition(Ex.MakeBinary(Et.Equal, input, Ex.Default(from)),
NoResult(typeof(string)),
result);
var lambda = Ex.Lambda(block, input);
return(lambda);
}
internal static IQueryable <T> ApplyMethod <T>(this IQueryable <T> source, string property, string methodName)
{
string[] props = property.Split('.');
Type type = typeof(T);
ParameterExpression arg = Expression.Parameter(type, "x");
Expression expr = arg;
foreach (string prop in props)
{
// use reflection (not ComponentModel) to mirror LINQ
PropertyInfo pi = type.GetProperty(prop);
expr = Expression.Property(expr, pi);
type = pi.PropertyType;
}
Type delegateType = typeof(Func <,>).MakeGenericType(typeof(T), type);
LambdaExpression lambda = Expression.Lambda(delegateType, expr, arg);
object result = typeof(Queryable).GetMethods().Single(
method => method.Name == methodName &&
method.IsGenericMethodDefinition &&
method.GetGenericArguments().Length == 2 &&
method.GetParameters().Length == 2)
.MakeGenericMethod(typeof(T), type)
.Invoke(null, new object[] { source, lambda });
return((IOrderedQueryable <T>)result);
}
internal bool AddSplattedArgumentTest(object value, Expression /*!*/ expression, out int listLength, out ParameterExpression /*!*/ listVariable)
{
if (value == null)
{
AddRestriction(Ast.Equal(expression, Ast.Constant(null)));
}
else
{
// test exact type:
AddTypeRestriction(value.GetType(), expression);
List <object> list = value as List <object>;
if (list != null)
{
Type type = typeof(List <object>);
listLength = list.Count;
listVariable = GetTemporary(type, "#list");
AddCondition(Ast.Equal(
Ast.Property(Ast.Assign(listVariable, Ast.Convert(expression, type)), type.GetProperty("Count")),
Ast.Constant(list.Count))
);
return(true);
}
}
listLength = -1;
listVariable = null;
return(false);
}
public LambdaExpression CreateLambda(Type from, Type to)
{
var toParameters = to.GetTypeInfo().GenericTypeArguments;
var tupa = toParameters.Length;
var input = Ex.Parameter(from, "input");
var converters = toParameters.Select(p => Ref.GetLambda(typeof(string), p)).ToArray();
var res = toParameters.Select(p => Ex.Parameter(typeof(ConversionResult <>).MakeGenericType(p))).ToArray();
var end = Ex.Label(typeof(ConversionResult <>).MakeGenericType(to), "end");
var indexer = typeof(string[]).GetTypeInfo().GetDeclaredProperty("Item");
var split = Ex.Parameter(typeof(string[]), "split");
var conversion = Ex.Block(converters.Select((c, i) =>
Ex.Block(
Ex.Assign(res[i],
c.ApplyTo(Ex.MakeIndex(split, indexer, new[] { Ex.MakeBinary(Et.Add, Ex.Constant(i), Ex.MakeBinary(Et.Subtract, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa))) }))),
Ex.IfThen(Ex.Not(Ex.Property(res[i], nameof(IConversionResult.IsSuccessful))),
Ex.Goto(end, NoResult(to))))));
var block = Ex.Block(new[] { split },
Ex.Assign(split, Ex.Call(input, nameof(string.Split), Type.EmptyTypes, _separator)),
Ex.Condition(Ex.MakeBinary(Et.LessThan, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa)),
NoResult(to),
Ex.Block(res,
Ex.IfThen(Ex.MakeBinary(Et.GreaterThan, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa)),
Ex.Assign(Ex.ArrayAccess(split, Ex.MakeBinary(Et.Subtract, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa))),
Ex.Call(typeof(string), nameof(string.Join), Type.EmptyTypes, _separatorString,
Ex.Call(typeof(Enumerable), nameof(Enumerable.Take), new[] { typeof(string) }, split,
Ex.MakeBinary(Et.Add, Ex.Constant(1), Ex.MakeBinary(Et.Subtract, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa))))))),
conversion,
Ex.Label(end, Result(to, Ex.Call(Creator(to), res.Select(r => Ex.Property(r, nameof(IConversionResult.Result)))))))));
var lambda = Ex.Lambda(block, input);
return(lambda);
}
private static Func <int[], int[]> GenerateCopyExpression()
{
var ctor = typeof(int[]).GetConstructor(new[] { typeof(int) });
var get = typeof(int[]).GetMethod("Get", new[] { typeof(int) });
var set = typeof(int[]).GetMethod("Set", new[] { typeof(int), typeof(int) });
var p1 = Exp.Parameter(typeof(int[]));
var v1 = Exp.Variable(typeof(int[]));
var v2 = Exp.Variable(typeof(int));
var @break = Exp.Label();
var block = Exp.Block(
new[] { v1, v2 },
Exp.Assign(v1, Exp.New(ctor, Exp.Property(p1, "Length"))),
Exp.Assign(v2, Exp.Constant(0)),
Exp.Loop(
Exp.IfThenElse(
Exp.LessThan(v2, Exp.Property(p1, "Length")),
Exp.Block(
Exp.Call(v1, set, v2, Exp.Call(p1, get, v2)),
Exp.AddAssign(v2, Exp.Constant(1))
),
Exp.Break(@break)
),
@break),
v1
);
return(Exp.Lambda <Func <int[], int[]> >(block, new ParameterExpression[] { p1 }).Compile());
}
static GlyphRunFormatter()
{
var refType = typeof(CharacterBufferReference);
_textFormattingMode = typeof(GlyphRun).GetField("_textFormattingMode", BindingFlags.NonPublic | BindingFlags.Instance);
{
var property = refType.GetProperty("CharacterBuffer", BindingFlags.NonPublic | BindingFlags.Instance);
var param0 = Expr.Parameter(refType);
var expr = Expr.Convert(Expr.Property(param0, property), typeof(IList <char>));
var lambda = Expr.Lambda <Func <CharacterBufferReference, IList <char> > >(expr, param0);
getCharBuf = lambda.Compile();
}
{
var property = refType.GetProperty("OffsetToFirstChar", BindingFlags.NonPublic | BindingFlags.Instance);
var param0 = Expr.Parameter(refType);
var expr = Expr.Property(param0, property);
var lambda = Expr.Lambda <Func <CharacterBufferReference, int> >(expr, param0);
getCharOffset = lambda.Compile();
}
{
var ctor = typeof(TextBounds).GetConstructors(BindingFlags.NonPublic | BindingFlags.Instance)[0];
var param0 = Expr.Parameter(typeof(Rect));
var expr = Expr.New(ctor, param0, Expr.Constant(FlowDirection.LeftToRight), Expr.Constant(null, typeof(IList <TextRunBounds>)));
var lambda = Expr.Lambda <Func <Rect, TextBounds> >(expr, param0);
makeBounds = lambda.Compile();
}
}
static Expression GetArgument(Expression Expression, int n)
{
if (Expression.Type == typeof(LuaArguments))
return Expression.Property(Expression, "Item", Expression.Constant(n));
else
return Expression.ArrayAccess(Expression, Expression.Constant(n));
}
private IQueryOver <Document, TIndex> BindQueryOverByPath <TIndex>(string name)
{
IQueryOver <Document> queryOver;
if (_joins.TryGetValue(name, out queryOver))
{
return((IQueryOver <Document, TIndex>)queryOver);
}
// public IList<{TIndex}> {TIndex} {get;set;}
var dynamicMethod = new DynamicMethod(typeof(TIndex).Name, typeof(IEnumerable <TIndex>), null, typeof(Document));
var syntheticMethod = new SyntheticMethodInfo(dynamicMethod, typeof(Document));
var syntheticProperty = new SyntheticPropertyInfo(syntheticMethod);
// doc => doc.{TIndex}
var parameter = Expression.Parameter(typeof(Document), "doc");
var syntheticExpression = (Expression <Func <Document, IEnumerable <TIndex> > >)Expression.Lambda(
typeof(Func <Document, IEnumerable <TIndex> >),
Expression.Property(parameter, syntheticProperty),
parameter);
TIndex alias = default(TIndex);
var join = BindDocument().JoinQueryOver(syntheticExpression, () => alias);
_joins.Add(name, join);
return(join);
}
/// <summary>
/// Implements Class#new feature.
/// </summary>
public void BuildObjectConstruction(MetaObjectBuilder /*!*/ metaBuilder, CallArguments /*!*/ args, string /*!*/ methodName)
{
Debug.Assert(!IsSingletonClass, "Cannot instantiate singletons");
Type type = GetUnderlyingSystemType();
RubyMemberInfo initializer = ResolveMethod(Symbols.Initialize, true).InvalidateSitesOnOverride();
RubyMethodInfo overriddenInitializer = initializer as RubyMethodInfo;
// check the version of this class to ensure the initializer won't be changed without rebuilding the site:
metaBuilder.AddCondition(
Ast.Equal(Ast.Property(Ast.Constant(this), RubyModule.VersionProperty), Ast.Constant(this.Version))
);
// Initializer is overridden => initializer is invoked on an uninitialized instance.
// Is user class (defined in Ruby code) => construct it as if it had initializer that calls super immediately
// (we need to "inherit" factories/constructors from the base class (e.g. class S < String; self; end.new('foo')).
if (overriddenInitializer != null || (_isRubyClass && _structInfo == null))
{
metaBuilder.Result = MakeAllocatorCall(args, () => Ast.Constant(Name));
if (overriddenInitializer != null || (_isRubyClass && initializer != null && !initializer.IsEmpty))
{
BuildOverriddenInitializerCall(metaBuilder, args, initializer);
}
}
else if (type.IsSubclassOf(typeof(Delegate)))
{
metaBuilder.Result = MakeDelegateConstructorCall(type, args);
}
else
{
MethodBase[] constructionOverloads;
bool includeSelf;
if (_structInfo != null)
{
constructionOverloads = new MethodBase[] { Methods.CreateStructInstance };
includeSelf = true;
}
else if (_factories != null)
{
constructionOverloads = (MethodBase[])ReflectionUtils.GetMethodInfos(_factories);
includeSelf = true;
}
else
{
constructionOverloads = type.GetConstructors();
if (constructionOverloads.Length == 0)
{
throw RubyExceptions.CreateTypeError(String.Format("allocator undefined for {0}", Name));
}
includeSelf = false;
}
RubyMethodGroupInfo.BuildCallNoFlow(metaBuilder, args, methodName, constructionOverloads, includeSelf, false);
RubyMethodGroupInfo.ApplyBlockFlowHandlingInternal(metaBuilder, args);
}
}
private static Expression <Func <T, object> > ToLambda <T>(string propertyName)
{
var parameter = Expression.Parameter(typeof(T));
var property = Expression.Property(parameter, propertyName);
var propAsObject = Expression.Convert(property, typeof(object));
return(Expression.Lambda <Func <T, object> >(propAsObject, parameter));
}
public void MemberAccess_property_expression()
{
var expression =
LinqExpression.Property(
LinqExpression.Parameter(typeof(SampleClass)),
nameof(SampleClass.InstanceProperty));
ShouldRoundrip(expression);
}
private static Ex conditional(Type from, Ex input, Ex result)
{
return(Ex.Condition(
Ex.MakeBinary(Et.OrElse,
Ex.MakeBinary(Et.Equal, input, Ex.Default(from)),
Ex.MakeBinary(Et.Equal, Ex.Property(input, nameof(Array.Length)), Ex.Constant(0))),
NoResult(typeof(string)),
Result(typeof(string), result)));
}
public void MemberAccess_property_type()
{
var expression =
LinqExpression.Property(
null,
typeof(SampleClass),
nameof(SampleClass.StaticProperty));
ShouldRoundrip(expression);
}
public void MemberAccess_property_expression_arguments()
{
var expression =
LinqExpression.Property(
LinqExpression.Parameter(typeof(SampleClass)),
"Indexer",
LinqExpression.Parameter(typeof(int)));
ShouldRoundrip(expression);
}
/// <summary>Generate a specific property getter for a specific type</summary>
/// <typeparam name="T">The type which contains the member</typeparam>
/// <typeparam name="TResult">The static member's actual type</typeparam>
/// <param name="memberName">The member's name as defined in <typeparamref name="T"/></param>
/// <returns>A compiled lambda which can access (get) the static member</returns>
/// <remarks>Generates a method similar to this:
/// <code>
/// TResult GetMethod()
/// {
/// return T.memberName;
/// }
/// </code>
/// </remarks>
public static Func <TResult> GenerateStaticPropertyGetter <T, TResult>(string memberName)
{
Contract.Requires <ArgumentException>(!string.IsNullOrEmpty(memberName));
Contract.Ensures(Contract.Result <Func <TResult> >() != null);
var member = Expr.Property(null, typeof(T), memberName); // basically 'T.memberName'
var lambda = Expr.Lambda <Func <TResult> >(member);
return(lambda.Compile());
}
public static Expression SelectProperty(Type type, string property)
{
var returnType = GetPropertyType(type, property);
var funcType = typeof(Func <,>).MakeGenericType(type, returnType);
var param = Expression.Parameter(type, "i");
var propertyExpression = Expression.Property(param, property);
var expressionFactory = CreateExpressionFactory(funcType);
return(expressionFactory.Invoke(null, new object[] { propertyExpression, new[] { param } }) as Expression);
}
private static (SystemExpression, UnaryExpression) GetBodyExpressions(ParameterExpression parameter, string propertyName, object value)
{
var documentType = typeof(TQueryable);
if (propertyName.Contains("."))
{
var propertyType = documentType;
var propertyNames = propertyName.Split('.');
SystemExpression bodyLeft = parameter;
foreach (var property in propertyNames)
{
var propertyInfo = propertyType.GetProperty(property, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
if (propertyInfo == null)
{
throw new ArgumentOutOfRangeException(nameof(propertyInfo), propertyName);
}
propertyType = propertyInfo.PropertyType;
bodyLeft = SystemExpression.Property(bodyLeft, property);
}
var bodyRight =
SystemExpression.Convert(
SystemExpression.Constant(GetConstantValue(value, bodyLeft.Type)),
bodyLeft.Type
);
return(bodyLeft, bodyRight);
}
else
{
var propertyInfo = documentType.GetProperty(propertyName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
if (propertyInfo == null)
{
throw new ArgumentOutOfRangeException(nameof(propertyName), propertyName);
}
var bodyLeft = SystemExpression.MakeMemberAccess(parameter, propertyInfo);
var bodyRight =
SystemExpression.Convert(
SystemExpression.Constant(GetConstantValue(value, propertyInfo.PropertyType)),
propertyInfo.PropertyType
);
return(bodyLeft, bodyRight);
}
}
public TExGCX(Expression ex_) : base(ex_)
{
fs = Ex.Field(ex, "fs");
v2s = Ex.Field(ex, "v2s");
v3s = Ex.Field(ex, "v3s");
rv2s = Ex.Field(ex, "rv2s");
index = Ex.Field(ex, "index");
i_float = Ex.Field(ex, "i").As <float>();
pi_float = Ex.Field(ex, "pi").As <float>();
beh_loc = Ex.Property(ex, "Loc");
bpi = Ex.Property(ex, "AsBPI");
}
private static Ex enumeratorConversion(Type to, Ex enumerator, Type eType, LambdaExpression[] converters, Ex[] res, System.Linq.Expressions.LabelTarget end)
{
return(Ex.Block(res.Zip(converters, (r, con) =>
Ex.Block(
Ex.IfThenElse(
enumerator.Type.GetTypeInfo().GetDeclaredMethod(nameof(IEnumerator.MoveNext)) == null
? Ex.Call(Ex.Convert(enumerator, typeof(IEnumerator)), nameof(IEnumerator.MoveNext), Type.EmptyTypes)
: Ex.Call(enumerator, enumerator.Type.GetTypeInfo().GetDeclaredMethod(nameof(IEnumerator.MoveNext))),
Ex.Assign(r, con.ApplyTo(Ex.Property(enumerator, nameof(IEnumerator.Current)))),
Ex.Goto(end, NoResult(to))),
Ex.IfThen(Ex.Not(Ex.Property(r, nameof(IConversionResult.IsSuccessful))),
Ex.Goto(end, NoResult(to)))))));
}
static Func <TextSelection, object> GenerateGetTextViewAction()
{
ParameterExpression textSelectionArgument = Expression.Parameter(typeof(TextSelection), nameof(textSelectionArgument));
MemberExpression body = Expression.Property(textSelectionArgument, "TextView");
var lambda = Expression.Lambda <Func <TextSelection, object> >(
body: body,
parameters: new[] { textSelectionArgument }
);
return(lambda.Compile());
}
