`TGDBExpressionPartArrayIdx`
pt		VarParam
pt		PTypeReq
pt		PTypeDeRefReq
pt		PTypeIndexReq
pt	ro	ArrayPTypeResult
pt	ro	ArrayPTypeIsDeRef
pt	ro	ArrayPTypeIsPointer
pt		ArrayPTypeNestIdx
pt		ArrayPTypePointerIdx

`TGDBExpressionPartBracketed`

`TGDBExpression`

`TGDBExpressionPart`
	ro	Parts
	ro	Text
	ro	TextStrFixed
	ro	TextEx