本文整理匯總了C#中AstExpression.GetSelfAndChildrenRecursive方法的典型用法代碼示例。如果您正苦於以下問題:C# AstExpression.GetSelfAndChildrenRecursive方法的具體用法?C# AstExpression.GetSelfAndChildrenRecursive怎麽用?C# AstExpression.GetSelfAndChildrenRecursive使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類AstExpression
的用法示例。
在下文中一共展示了AstExpression.GetSelfAndChildrenRecursive方法的2個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: UnboxByRefIfGeneric
private static void UnboxByRefIfGeneric(XTypeReference type, AstExpression node, XTypeSystem typeSystem)
{
if (!type.IsGenericParameter)
return;
var resultType = node.InferredType ?? node.ExpectedType;
if (resultType == null)
return;
if (!TreatAsStruct(type, resultType))
return;
// find the first unbox, which should be our target.
var unbox = node.GetSelfAndChildrenRecursive<AstExpression>( n => n.Code == AstCode.Unbox).FirstOrDefault();
if (unbox == null)
return;
// TODO: Of course we need to unbox generic instances as well,
// but at the moment the GenericInstanceConverter does
// not look at 'node.StoreByRefExpression' and thus
// does not add the required argument, resulting
// in unverifyable code. This should be fixed, and
// then these lines can be removed.
if (resultType.IsGenericInstance)
return;
ConvertUnboxStruct(unbox, resultType, typeSystem);
}
示例2: IsSafeForInlineOver
/// <summary>
/// Determines whether it is safe to move 'expressionBeingMoved' past 'expr'
/// </summary>
bool IsSafeForInlineOver(AstExpression expr, AstExpression expressionBeingMoved)
{
switch (expr.Code) {
case AstCode.Ldloc:
AstVariable loadedVar = (AstVariable)expr.Operand;
if (numLdloca.GetOrDefault(loadedVar) != 0) {
// abort, inlining is not possible
return false;
}
foreach (AstExpression potentialStore in expressionBeingMoved.GetSelfAndChildrenRecursive<AstExpression>()) {
if (potentialStore.Code == AstCode.Stloc && potentialStore.Operand == loadedVar)
return false;
}
// the expression is loading a non-forbidden variable
return true;
case AstCode.Ldloca:
case AstCode.Ldflda:
case AstCode.Ldsflda:
case AstCode.Ldelema:
case AstCode.AddressOf:
case AstCode.ValueOf:
case AstCode.NullableOf:
// address-loading instructions are safe if their arguments are safe
foreach (AstExpression arg in expr.Arguments) {
if (!IsSafeForInlineOver(arg, expressionBeingMoved))
return false;
}
return true;
default:
// instructions with no side-effects are safe (except for Ldloc and Ldloca which are handled separately)
return expr.HasNoSideEffects();
}
}