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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: In precision typing we trust
Date: Thu, 28 Aug 2025 10:48:13 +0200
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On 2025-08-28 01:16, Lawrence D’Oliveiro wrote:
> On Wed, 27 Aug 2025 09:51:30 +0200, Dmitry A. Kazakov wrote:
> 
>> On Tue, 26 Aug 2025 17:00:58 -0700, Paul Rubin wrote:
>>>
>>> If it instead called its argument based on some decision,
>>> that wouldn't have been a type error.
>>
>> Sure. But this is not a type error, it is untyped.
>>
>> On Tue, 26 Aug 2025 09:48:51 -0700, Paul Rubin wrote:
>>
>>> ==>  TypeError: unsupported operand type(s) for +: 'function' and 'int'
> 
> Need I say more?

Yes:

def F(X):
    raise TypeError ("?")
F(1)

Hint: Type errors and errors in general cannot be checked at run-time. 
Errors are bugs. Dynamic checking and raising exception is not a bug, it 
is a behavior.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de