Fix parse error on empty flow containers

fktn-k commented 4 months ago

As reported in the issue #347, the latest parser mistakenly emits the parse errors on empty flow containers like:

foo: {}
bar: []

They are caused because the PR #350 lacked implementation for empty flow containers.
So, this PR has fixed them by adding the missing implementation and added some test cases to validate the changes.

Pull Request Checklist

Read the CONTRIBUTING.md file for detailed information.

[x] Changes are described in the pull request or in a referenced issue.
[x] The test suite compiles and runs without any error.
[x] The code coverage on your branch is 100%.
[x] The documentation is updated if you added/changed a feature.

Please don't

The C++11 support varies between different compilers and versions. Please note the list of supported compilers. Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with #ifdefs or other means.
Please refrain from proposing changes that would break YAML specifications. If you propose a conformant extension of YAML to be supported by the library, please motivate this extension.
Please do not open pull requests that address multiple issues.

github-actions[bot] commented 4 months ago

:octocat: Upload Coverage Event Notification

Coverage data has been uploaded for the commit 01690f78a2f752bc1adc6729c73de12b51d788c3. You can download the artifact which contains the same file uploaded to the Coveralls and its HTML version.

Name	fkYAML_coverage.pr351.zip
ID	1540759864
URL	https://github.com/fktn-k/fkYAML/actions/runs/9254185815/artifacts/1540759864

coveralls commented 4 months ago

Pull Request Test Coverage Report for Build 9254185815

Details

12 of 12 (100.0%) changed or added relevant lines in 1 file are covered.
No unchanged relevant lines lost coverage.
Overall coverage remained the same at 100.0%

Totals
Change from base Build 9247789643:	0.0%
Covered Lines:	3897
Relevant Lines:	3897

fktn-k / fkYAML