Release fkYAML version 0.4.1 · fktn-k/fkYAML

What's Changed

Add get_value_inplace API to basic_node (#443, @fktn-k)
- The new API get_value_inplace() converts a node value into a given type and writes the result into a given output parameter.
- The target type doesn't have to be default-constructible since the API doesn't construct an instance during the conversion.
- See the dedicated API reference page for more details.
Mapping key/value access in range based for loops (#458, @fktn-k)
- Proposed by @sndth in the discussion #400
- The new API map_items() allows accessing mapping keys/values in range-based for loops.
- Structured binding support is added to fkyaml::basic_node::iterator and fkyaml::basic_node::const_iterator.
```
fkyaml::node mapping = {{"a", 123}, {"b", 3.14}};
for (auto& [key, val] : mapping.map_items()) {
    // `key` and `val` are both of type `fkyaml::node::reference`.
    std::cout << "key: " << key << ", value: " << val << std::endl;
}
// output:
// key: a, value: 123
// key: b, value: 3.14
```
- See the dedicated API reference page for more details.
support std::forward_list in from_node (#444, @fktn-k)

Emit an error if ":" is missing after a mapping key (#450, @fktn-k)
- Reported by @sndth in the issue #449
Fix bad indentation detection for block collection entries (#451, @fktn-k)
- Reported by @sndth in the issue #449
Fix serialization of empty collections
- fix: Fixed a bug where serialize didn't write out empty vectors and mappings (#456, @johan-gson)
- Add test cases for serializing empty collection nodes (#457, @fktn-k)
- Fix: made sure that empty documents just serialize to [] or {} (#460, @johan-gson)
- Add test cases for serializing root empty collections (#461, @fktn-k)