`TUserConstant`

`TFloatConstant`
		Value

`TConstant`

`TExprWord`
	ro	ExprFunc
	ro	IsOperator
	ro	CanVary
	ro	IsVariable
	ro	NeedsCopy
		FixedLen
	ro	ResultType
	ro	MinFunctionArg
	ro	MaxFunctionArg
	ro	Name
	ro	ShortName
	ro	Description
	ro	TypeSpec