Fix temporary scope finding



See merge request !16

Fix doctest for __restrict__



See merge request !15

Use the __restrict__ qualifier instead of the restrict keyword

`restrict` is keyword in C, but in C++ there is only a type qualifier `__restrict__`.
To my knowledge, the latter is available in both languages.

See merge request !12

Process single-writer heuristic early, deprecate late single-writer resolution



See merge request !10

`restrict` is keyword in C, but in C++ there is only a type qualifier `__restrict__`.
To my knowledge, the latter is available in both languages.

Allow subclassing of TemporaryVariable, by passing kwargs through

Shovelling additional data in the underlying Record requires
TemporaryVariable to pas through any unrecognized keyword arguments.
ArrayBase will check whether these are allowed through
allowed_extra_kwargs.

See merge request !11

Shovelling additional data in the underlying Record requires
TemporaryVariable to pas through any unrecognized keyword arguments.
ArrayBase will check whether these are allowed through
allowed_extra_kwargs.

Add implementation of constant args to CAST