transform_iterator end iterator with non-default-constructible unary function
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 30/100
Research direction
Start by locating transform_iterator and its end-iterator construction in the Boost.Iterator module. Inspect how the transformation function is stored and why an end iterator requires another copy, then determine whether the end iterator can be created without that requirement. Done means non-default-constructible unary functions work without constructing or copying a second function.
Written by the indexing model from the issue text.
Description
Currently one have to construct/copy a second copy of transformation function for an end iterator what is unwanted and seems to be omission of the library design. For example, Boost.Range solves it via wrapping user functor with optional, unfortunately.
- Dominant language
- C++
- Stars
- 23
- Forks
- 70
- PR merge metrics
- No merged PRs in 30d
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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