|
public static Empty ( ) : |
||
| Результат | ||
public Expr CompileIfStatement(ParseTreeNode parseNode)
{
//[0] - Condition
//[1] - True Block
//[2] - {ElseIf Statements}
//[3] - [Else Block]
bool hasElseIfs = parseNode.ChildNodes[2].ChildNodes.Any();
bool hasElse = parseNode.ChildNodes[3].ChildNodes.Any();
Expr ifStatement = Expr.Empty();
//Add else component
if (hasElse)
{
ifStatement = CompileBlock(parseNode.ChildNodes[3]);
}
foreach (var elseIf in Enumerable.Reverse(parseNode.ChildNodes[2].ChildNodes))
{
ifStatement = Expr.IfThenElse(
TypeHelpers.ToBoolean(CompileExpression(elseIf.ChildNodes[0])),
CompileBlock(elseIf.ChildNodes[1]),
ifStatement);
}
ifStatement = Expr.IfThenElse(
TypeHelpers.ToBoolean(CompileExpression(parseNode.ChildNodes[0])),
CompileBlock(parseNode.ChildNodes[1]),
ifStatement
);
return(ifStatement);
}
public void Lambda()
{
var expression =
LinqExpression.Lambda(LinqExpression.Empty());
ShouldRoundrip(expression);
}
public void TypeBinary_is()
{
var expression =
LinqExpression.TypeIs(
LinqExpression.Empty(),
typeof(object));
ShouldRoundrip(expression);
}
public void Empty()
{
var expected = LinqExpression.Empty();
using var g = new GraphEngine.Graph();
g.LoadFromString(@"
@prefix : <http://example.com/> .
:s
a :Empty ;
.
");
var s = g.GetUriNode(":s");
var actual = Expression.Parse(s).LinqExpression;
Console.WriteLine(actual.GetDebugView());
actual.Should().Be(expected);
}
protected override Expression VisitConditional(ConditionalExpression node)
{
var test = Visit(node.Test);
if (test.TryAsConst(out bool v))
{
var result = Visit(v ? node.IfTrue : node.IfFalse);
if (node.Type == typeof(void))
{
//Don't change the return type
return(Ex.Block(result, Ex.Empty()));
}
else
{
return(result);
}
}
return(Expression.Condition(test, DeferWithNoReduction(base.Visit, node.IfTrue),
DeferWithNoReduction(base.Visit, node.IfFalse), node.Type));
}
private static CloneDelegate <T> GetObjectCloner <T>(Type type, CloneContext context)
{
Delegate result;
var cache = context.Cache;
var key = new CacheKey(typeof(T), type);
if (!cache.TryGetValue(key, out result))
{
var statements = new List <LinqExpression>();
var param = LinqExpression.Parameter(typeof(T).MakeByRefType(), "input");
var output = LinqExpression.Parameter(typeof(T).MakeByRefType(), "output");
var contextParam = LinqExpression.Parameter(typeof(CloneContext), "context");
ParameterExpression localCast;
ParameterExpression localOutput;
ParameterExpression localObj;
bool isStruct = type.IsValueType && typeof(T) == type;
bool isArray = type.IsArray;
if (isStruct || isArray)
{
localCast = param;
localOutput = output;
localObj = null;
}
else
{
localObj = LinqExpression.Variable(typeof(object), "localObj");
localCast = LinqExpression.Variable(type, "localCast");
localOutput = LinqExpression.Variable(type, "localOut");
statements.Add(LinqExpression.Assign(localCast, LinqExpression.Convert(param, type)));
if (context.IsSelfClone)
{
statements.Add(LinqExpression.Call(contextParam, MethodAdd, param, param));
statements.Add(LinqExpression.Assign(output, localCast));
}
else
{
// NOTE: this can fail if there is no default constructor for type.
// for example Dictionary<K,T>.ValueCollection, which is created when a access to members Keys or Values is performed on the dicitonary.
statements.Add(LinqExpression.Assign(localOutput, LinqExpression.New(type)));
statements.Add(LinqExpression.Assign(output, localOutput));
statements.Add(LinqExpression.Call(contextParam, MethodAdd, param, localOutput));
}
}
var fields = GetFields(type);
// If we have a struct with primitive only
if (isArray)
{
var genericCloneMethod = DeepcloneArray.GetGenericMethodDefinition();
genericCloneMethod = genericCloneMethod.MakeGenericMethod(new[] { type.GetElementType() });
statements.Add(LinqExpression.Call(genericCloneMethod, localCast, localOutput, contextParam));
}
else if (isStruct && fields.All(field => IsPrimitive(field.FieldType)))
{
statements.Add(LinqExpression.Assign(localOutput, param));
}
else
{
foreach (var field in fields)
{
if (field.IsInitOnly)
{
throw new InvalidOperationException(String.Format("Field [{0}] in [{1}] is readonly, which is not supported in DeepClone", field.Name, type));
}
var t = field.FieldType;
if (t.IsSubclassOf(typeof(Delegate)))
{
continue;
}
var value = LinqExpression.Field(localCast, field);
LinqExpression cloneField = null;
if (IsPrimitive(t))
{
if (!context.IsSelfClone)
{
cloneField = LinqExpression.Assign(LinqExpression.Field(localOutput, field), value);
}
}
else
{
MethodInfo genericCloneMethod;
if (field.FieldType.IsArray)
{
genericCloneMethod = DeepcloneArray.GetGenericMethodDefinition();
genericCloneMethod = genericCloneMethod.MakeGenericMethod(new[] { field.FieldType.GetElementType() });
}
else
{
genericCloneMethod = DeepcloneObject.GetGenericMethodDefinition();
genericCloneMethod = genericCloneMethod.MakeGenericMethod(new[] { field.FieldType });
}
cloneField = LinqExpression.Call(genericCloneMethod, value, context.IsSelfClone ? value : LinqExpression.Field(localOutput, field), contextParam);
}
if (cloneField != null)
{
statements.Add(cloneField);
}
}
}
LinqExpression body;
if (isStruct || isArray)
{
if (statements.Count == 0)
{
body = LinqExpression.Empty();
}
else
{
body = LinqExpression.Block(statements);
}
}
else
{
var innerBody = LinqExpression.Block(new[] { localCast, localOutput }, statements);
body = LinqExpression.Block(
new[] { localObj },
LinqExpression.IfThenElse(
LinqExpression.Call(contextParam, MethodTryGetValue, param, localObj), LinqExpression.Assign(output, LinqExpression.Convert(localObj, typeof(T))), innerBody));
}
var tempLambda = LinqExpression.Lambda <CloneDelegate <T> >(body, param, output, contextParam);
result = tempLambda.Compile();
cache.Add(key, result);
}
return((CloneDelegate <T>)result);
}
public override SysExpr ToExpression() => Type == typeof(void) ? SysExpr.Empty() : SysExpr.Default(Type);
private static TDelegate Simdize <T, TDelegate>(LambdaExpression expr)
where T : unmanaged
where TDelegate : Delegate
{
if (_cache.TryGetValue(expr, out var value))
{
return((TDelegate)value);
}
var simdVisitor = new SimdVisitor <T>(expr);
var simdBody = simdVisitor.Visit(expr.Body);
var i = Expr.Parameter(typeof(int), "i");
var len = Expr.Parameter(typeof(int), "len");
var xMemories = expr.Parameters.Select(p => Expr.Parameter(typeof(ReadOnlyMemory <T>), p.Name)).ToArray();
var resultMemory = Expr.Parameter(typeof(Memory <T>), "result");
var xSpans = xMemories.Select(p => Expr.Variable(typeof(ReadOnlySpan <T>), $"{p.Name}Span")).ToArray();
var resultSpan = Expr.Variable(typeof(Span <T>), "resultSpan");
var xVecSpans = xMemories.Select(p => Expr.Variable(typeof(ReadOnlySpan <Vector <T> >), $"{p.Name}VecSpan")).ToArray();
var resultVecSpan = Expr.Variable(typeof(Span <Vector <T> >), "resultVecSpan");
var xSpanGetters = xSpans.Select(p => Expr.Call(null, MemberTable._ReadOnlySpan <T> .GetItem, p, i)).ToArray();
var xVecSpanGetters = xVecSpans.Select(p => Expr.Call(null, MemberTable._ReadOnlySpan <Vector <T> > .GetItem, p, i)).ToArray();
var exprCall = new LambdaArgsVisitor(expr.Parameters.Zip(xSpanGetters).ToDictionary(tpl => tpl.Item1, tpl => (Expr)tpl.Item2)).Visit(expr.Body);
var simdCall = new LambdaArgsVisitor(simdVisitor.NewArguments.Zip(xVecSpanGetters).ToDictionary(tpl => tpl.Item1, tpl => (Expr)tpl.Item2)).Visit(simdBody);
var resultSpanSetter = Expr.Call(null, MemberTable._Span <T> .SetItem, resultSpan, i, exprCall);
var resultVecSpanSetter = Expr.Call(null, MemberTable._Span <Vector <T> > .SetItem, resultVecSpan, i, simdCall);
var parameters = xMemories.Concat(new[] { resultMemory });
var variables = xSpans.Concat(xVecSpans).Concat(new[] { i, len, resultSpan, resultVecSpan });
var block = new List <Expr>();
// xSpan = xMemory.Span;
block.AddRange(xMemories.Zip(xSpans, (memory, span) =>
Expr.Assign(
span,
Expr.Property(memory, MemberTable._ReadOnlyMemory <T> .Span)
)
));
// xVecSpan = MemoryMarshal.Cast<T, Vector<T>>(xSpan);
block.AddRange(xSpans.Zip(xVecSpans, (span, vSpan) =>
Expr.Assign(
vSpan,
Expr.Call(null, MemberTable._MemoryMarshal.Cast <T, Vector <T> > .ForReadOnlySpan, span)
)
));
// resultSpan = resultMemory.Span;
block.Add(
Expr.Assign(
resultSpan,
Expr.Property(resultMemory, MemberTable._Memory <T> .Span)
)
);
// resultVecSpan = MemoryMarshal.Cast<T, Vector<T>>(resultSpan);
block.Add(
Expr.Assign(
resultVecSpan,
Expr.Call(null, MemberTable._MemoryMarshal.Cast <T, Vector <T> > .ForSpan, resultSpan)
)
);
// for(i = 0, len = resultVecSpan.Length & ~0b1111; i < len; )
// {
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x0
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x1
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x2
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x3
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x4
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x5
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x6
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x7
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x8
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x9
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0xA
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0xB
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0xC
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0xD
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0xE
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0xF
// }
block.Add(
ExpressionEx.For(
Expr.Block(
Expr.Assign(i, Expr.Constant(0)),
Expr.Assign(
len,
Expr.And(Expr.Property(resultVecSpan, MemberTable._Span <Vector <T> > .Length), Expr.Constant(~0b1111))
)
),
Expr.LessThan(i, len),
Expr.Empty(),
Expr.Block(
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x0
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x1
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x2
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x3
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x4
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x5
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x6
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x7
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x8
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x9
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0xA
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0xB
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0xC
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0xD
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0xE
resultVecSpanSetter, Expr.PreIncrementAssign(i) // 0xF
)
)
);
// if(i < (resultVecSpan.Length & ~0b111))
// {
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x0
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x1
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x2
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x3
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x4
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x5
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x6
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x7
// }
block.Add(
Expr.IfThen(
Expr.LessThan(
i,
Expr.And(Expr.Property(resultVecSpan, MemberTable._Span <Vector <T> > .Length), Expr.Constant(~0b111))
),
Expr.Block(
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x0
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x1
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x2
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x3
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x4
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x5
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x6
resultVecSpanSetter, Expr.PreIncrementAssign(i) // 0x7
)
)
);
// if(i < (resultVecSpan.Length & ~0b11))
// {
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x0
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x1
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x2
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x3
// }
block.Add(
Expr.IfThen(
Expr.LessThan(
i,
Expr.And(Expr.Property(resultVecSpan, MemberTable._Span <Vector <T> > .Length), Expr.Constant(~0b11))
),
Expr.Block(
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x0
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x1
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x2
resultVecSpanSetter, Expr.PreIncrementAssign(i) // 0x3
)
)
);
// if(i < (resultVecSpan.Length & ~0b1))
// {
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x0
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x1
// }
block.Add(
Expr.IfThen(
Expr.LessThan(
i,
Expr.And(Expr.Property(resultVecSpan, MemberTable._Span <Vector <T> > .Length), Expr.Constant(~0b1))
),
Expr.Block(
resultVecSpanSetter, Expr.PreIncrementAssign(i), // 0x0
resultVecSpanSetter, Expr.PreIncrementAssign(i) // 0x1
)
)
);
// if(i < resultVecSpan.Length)
// {
// resultVecSpan[i] = simdCall(xVecSpan[i], ...); ++i; // 0x0
// }
block.Add(
Expr.IfThen(
Expr.LessThan(
i,
Expr.Property(resultVecSpan, MemberTable._Span <Vector <T> > .Length)
),
Expr.Block(
resultVecSpanSetter, Expr.PreIncrementAssign(i) // 0x0
)
)
);
// for(i = Vector<T>.Count * resultVecSpan.Length; i < resultSpan.Length; )
// {
// resultSpan[i] = exprCall(xSpan[i], ...); ++i;
// }
block.Add(
ExpressionEx.For(
Expr.Assign(
i,
Expr.Multiply(
Expr.Constant(Vector <T> .Count),
Expr.Property(resultVecSpan, MemberTable._Span <Vector <T> > .Length)
)
),
Expr.LessThan(i, Expr.Property(resultSpan, MemberTable._Span <T> .Length)),
Expr.Empty(),
Expr.Block(
resultSpanSetter, Expr.PreIncrementAssign(i)
)
)
);
var retval = Expr.Lambda <TDelegate>(Expr.Block(variables, block), parameters).Compile();
_cache.TryAdd(expr, retval);
return(retval);
}
public void Empty()
{
var expression = LinqExpression.Empty();
ShouldRoundrip(expression);
}
/// <summary>
/// Creates a <see cref="ConditionalExpression"/>.
/// </summary>
/// <param name="test">An <see cref="Expression"/> to set the <see cref="ConditionalExpression.Test"/> property equal to.</param>
/// <param name="ifTrue">An <see cref="Expression"/> to set the <see cref="ConditionalExpression.IfTrue"/> property equal to.</param>
/// <returns>A <see cref="ConditionalExpression"/> that has the <see cref="NodeType"/> property equal to
/// <see cref="ExpressionType.Conditional"/> and the <see cref="ConditionalExpression.Test"/>, <see cref="ConditionalExpression.IfTrue"/>,
/// properties set to the specified values. The <see cref="ConditionalExpression.IfFalse"/> property is set to default expression and
/// the type of the resulting <see cref="ConditionalExpression"/> returned by this method is <see cref="Void"/>.</returns>
public static ConditionalExpression IfThen(Expression test, Expression ifTrue)
{
return(Condition(test, ifTrue, Expression.Empty(), typeof(void)));
}
internal virtual Expression GetFalse()
{
return(Expression.Empty());
}
public static Expression TryNoCatch(this Expression expression) => Expression.TryCatch(expression, Expression.Catch(typeof(Exception).ToParameter(), Expression.Empty()));
public virtual Expr ToExpression()
{
var blockBody = new List <Expr>();
#if EXPERIMENTAL_GENERATOR
var variables = new HashSet <ParameterExpression>();
#endif
// AccessExpression is null on the root node (It's a dummy node)
// ReadExpression.Count > 1 can only happen if we decided to roll a loop, in which case all elements are identical.
// ReadExpression.Count = 0 can happen if the type is a value type. Otherwise this is new T[...] or new T().
if (AccessExpression != null)
{
if (ReadExpression.Count > 0)
{
blockBody.Add(Expr.Assign(AccessExpression, ReadExpression[0]));
}
else if (TypeToken.IsArray)
{
blockBody.Add(Expr.Assign(AccessExpression,
TypeToken.GetElementTypeToken().NewArrayBounds(Expr.Constant(MemberToken.Cardinality))));
}
else if (TypeToken.IsClass)
{
if (!TypeToken.HasDefaultConstructor)
{
throw new InvalidOperationException("Missing default constructor for " + TypeToken.Name);
}
blockBody.Add(Expr.Assign(AccessExpression, TypeToken.NewExpression()));
}
}
if (Children.Count > 0)
{
// Produce children if there are any
foreach (var child in Children)
{
var subExpression = child.ToExpression();
#if EXPERIMENTAL_GENERATOR
if (subExpression is BlockExpression subBlockExpression)
{
blockBody.AddRange(subBlockExpression.Expressions);
foreach (var subBlockVariable in subBlockExpression.Variables)
{
variables.Add(subBlockVariable);
}
}
else
{
blockBody.Add(subExpression);
}
#else
blockBody.Add(subExpression);
#endif
}
// Assert that there is at least one node in the block emitted.
if (blockBody.Count == 0)
{
throw new InvalidOperationException("Empty block");
}
}
// We allow empty blocks if there are no children for primitive types
if (blockBody.Count == 0)
{
return(Expr.Empty());
}
// If there's only one expression, just return it.
#if EXPERIMENTAL_GENERATOR
if (blockBody.Count == 1 && variables.Count == 0)
{
return(blockBody[0]);
}
return(Expression.Block(variables, blockBody));
#else
if (blockBody.Count == 1)
{
return(blockBody[0]);
}
return(Expr.Block(blockBody));
#endif
}