Table of Contents

Class StdLibDefaultAttribute

Namespace
RDCore.SDK.Runtime.Abstract.StdLib
Assembly
RDCore.SDK.dll

States the default value of an optional standard-library parameter, which its C# signature cannot carry.

[AttributeUsage(AttributeTargets.Parameter)]
public sealed class StdLibDefaultAttribute : Attribute
Inheritance
StdLibDefaultAttribute
Inherited Members

Remarks

A parameter is declared as a VBTypedValue, and C# gives a parameter of a class type no default but null (= default), which states no <default-value> clause at all: an omitted argument then takes the declared type's own default value. A member whose specification declares one, such as Optional Limit As Long = -1 (MS-VBAL §6.1.2.11.1.35), states it here, and the parameter's symbol carries it as the constant expression it is, so that an omitted argument takes it - and the member is told -1, which it cannot tell apart from an explicit -1, rather than 0, which it could not tell apart from an explicit 0.

👉 An enumeration's default needs none: an enumeration constant is a C# default, and is stated as one.

Constructors

StdLibDefaultAttribute(object)

States the default value of an optional standard-library parameter, which its C# signature cannot carry.

public StdLibDefaultAttribute(object value)

Parameters

value object

The default value, as the C# value of the declared type: an int for a Long or an Integer, a bool for a Boolean, a string for a String.

Remarks

A parameter is declared as a VBTypedValue, and C# gives a parameter of a class type no default but null (= default), which states no <default-value> clause at all: an omitted argument then takes the declared type's own default value. A member whose specification declares one, such as Optional Limit As Long = -1 (MS-VBAL §6.1.2.11.1.35), states it here, and the parameter's symbol carries it as the constant expression it is, so that an omitted argument takes it - and the member is told -1, which it cannot tell apart from an explicit -1, rather than 0, which it could not tell apart from an explicit 0.

👉 An enumeration's default needs none: an enumeration constant is a C# default, and is stated as one.

Properties

Value

The default value, as the C# value of the parameter's declared type.

public object Value { get; }

Property Value

object
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