Mark Wagner <mar### [at] gtenet> wrote:

[...]

> a.x is a vector expression, so "a" gets promoted to the 3 component
> vector <1,1,1>.  It's still a float.  See section 6.1.4.4 "Operator
> promotion" of the manual for more information.

Thank you Mark. It's the 'temporary promotion' that explains it. I will
look at the manual.

-- 
Kaveh

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