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TTMSMCPOptionalAttribute Class

Marks a parameter as optional and supplies the value used when it is omitted.

API unit family: TMS.MCP.Attributes Inherits from: TTMSMCPCustomAttribute Implements: ITMSMCPOptionalAttribute

Syntax

GeneratedPascalC++
TTMSMCPOptionalAttribute = class(TTMSMCPCustomAttribute, ITMSMCPOptionalAttribute)

class PASCALIMPLEMENTATION TTMSMCPOptionalAttribute : public TTMSMCPCustomAttribute, public ITMSMCPOptionalAttribute

Remarks

Every parameter is published as required until this attribute is applied. Delphi default parameter values are not visible through RTTI, so the fallback has to be repeated here: write [TTMSMCPOptionalAttribute(100)] in front of a parameter declared as ACount: Integer = 100. When the caller omits the argument the stored value is passed to the method; when the parameterless constructor is used an empty value is passed.

Properties

Name Description
Value Value passed to the method when the caller omits the argument.

Used by