`TBooleanConstant`
		Create
		AsPointer

`TConstant`
pt		GetResultType
		Create

`TExprWord`
pt		GetIsOperator
pt		GetIsVariable
pt		GetNeedsCopy
pt		GetFixedLen
pt		GetCanVary
pt		GetResultType
pt		GetMinFunctionArg
pt		GetMaxFunctionArg
pt		GetDescription
pt		GetTypeSpec
pt		GetShortName
pt		SetFixedLen
		Create
		AsPointer
		LenAsPointer
		IsNullAsPointer
		IsFunction