Method PostDecExceptZero

Namespace

Zyl.VectorTraits.Impl.Util

Assembly

VectorTraits.dll

PostDecExceptZero<T>(ref T, out T, T)

When not equal to the zero, post-decrement of the given managed pointer (当不与0相等时, 向给定的托管指针后置递减). Mnemonic: beforeValue = (*p != 0) ? *p-- : newValue).

public static ref T PostDecExceptZero<T>(ref T source, out T beforeValue, T newValue = default) where T : struct, IEquatable<T>

Parameters

source T

The managed pointer to decrement to (要向其递减的托管指针).

beforeValue T

When not equal to the zero, returns the value pointed to before the decrement. Otherwise, it returns newValue (当不与0相等时, 返回递减前所指向的值. 否则便返回 newValue).

newValue T

When equal to the zero, beforeValue returns the new value (当与0相等时, beforeValue 会返回这个新值).

Returns

T

When not equal to the zero, post-decrement of the given managed pointer. Otherwise, it returns to the source (当不与0相等时, 向给定的托管指针后置递减. 否则便返回 source).

Type Parameters

T

The elemental type of the managed pointer (托管指针的元素类型).

See Also

Subtract<T>(ref T, int)