Placeholder accessors can be default constructed #18
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* Placeholder accessor constructor can optionally not take memobj * Handler can specify the buffer later on
placeholder_accessors/index.md
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| The accessor API features constructors that don't take the handler parameter | ||
| and/or memory object as a constructor. Accessors can then be default | ||
| constructed, and the memory object can be assigned later when registering | ||
| the accessor in the command group. |
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We should describe the additional constructors which need to be added to allow deferred initialization of the memory object and handler.
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| The handler gains a new method, | ||
| `handler::require(accessor<T, dim, mode, target, acess::placeholder::true_t>)` | ||
| that registers the requirements of the placeholder accessor on the given |
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If we wish to support the option for constructing a regular accessor from a placeholder accessor (i.e. get_access) then this interface should also be extended to allow you to specify a memory object. We should also specify that an exception should be thrown if get_access is called without providing a memory object on a placeholder accessor which doesn't have a memory object already.
On a side note, perhaps we should consider changing the naming of this member function, get_access could be confused with the regular get_access member functions.
#21) * Providing explicit documentation for throwing an exception when no buffer exists. * Removed implementation details and provided interface specification only. * Applied fixes to Gordon's review * Changed has_buffer to be a const function * Changed wording for the placeholder accessor buffer
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I believe #124 offers a suitable alternative to this. |
Placeholder accessor constructor can optionally not take memobj
Handler can specify the buffer later on