Generic Image Library: Type Analysis Metafunctions

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# Type Analysis Metafunctions
[Metafunctions]

## Detailed Description

Metafunctions that determine properties of GIL types.

## Modules

| xxx_is_basic

Determines if GIL constructs are basic. Basic constructs are the ones that can be generated with the type factory methods pixel_reference_type, iterator_type, locator_type, view_type and image_type They can be mutable/immutable, planar/interleaved, step/nonstep. They must use GIL-provided models.

| xxx_is_step
| Determines if the given iterator/locator/view has a step that could be set dynamically.

| xxx_is_mutable
| Determines if the given pixel reference/iterator/locator/view is mutable (i.e. its pixels can be changed).

## Classes

struct | pixel_reference_is_proxy
| Determines whether the given pixel reference is a proxy class or a native C++ reference. More...
struct | pixel_is_reference
| Given a model of a pixel, determines whether the model represents a pixel reference (as opposed to pixel value). More...