[luatex] "Proper" use of \Udelimiterover &c

[Manuel Pégourié-Gonnard]

Le 14/07/2010 13:10, Will Robertson a écrit :
> On 14/07/2010, at 8:09 PM, Manuel Pégourié-Gonnard wrote:
> 
>> I'm not sure I agree. Your argument about Plain's definition of \overbrace is
>> very convincing, but does it cover all uses of \Udelimiterover? Or are macros
>> such as \overrightarrow or "generalized \widehat" likely to be reimplemented
>> using \Udelimiterover too?
> 
> I don't *think* so, but I'm not 100% confident. \widehat falls under the
> usual \mathaccent, and wouldn't \overrightarrow behave the same as
> \overbrace?
> 
There is no \mathop in the definition of \overrightarrow in plain.tex, unlike
\overbrace. (But you're obviously right for \widehat.)

Manuel.