Add more specific error message when attempting to parse empty input

colbychaskell commented 9 months ago

Addresses #4037

Modifies the sax parser to create an exception with a more specific error message when attempting to parse an empty input string or stream.

Modifies corresponding tests to expect the new error message.

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[x] Changes are described in the pull request, or an existing issue is referenced.
[x] The test suite compiles and runs without error.
[x] Code coverage is 100%. Test cases can be added by editing the test suite.
[x] The source code is amalgamated; that is, after making changes to the sources in the include/nlohmann directory, run make amalgamate to create the single-header files single_include/nlohmann/json.hpp and single_include/nlohmann/json_fwd.hpp. The whole process is described here.

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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.
Specifically, I am aware of compilation problems with Microsoft Visual Studio (there even is an issue label for this kind of bug). I understand that even in 2016, complete C++11 support isn't there yet. But please also understand that I do not want to drop features or uglify the code just to make Microsoft's sub-standard compiler happy. The past has shown that there are ways to express the functionality such that the code compiles with the most recent MSVC - unfortunately, this is not the main objective of the project.
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coveralls commented 9 months ago

coverage: 100.0%. remained the same when pulling 5c22104acfcff60f3a01b99d4c86c38529e88aa4 on colbychaskell:fix-parse-error-wording into edffad036d5a93ab5a10f72a7d835eeb0d2948f9 on nlohmann:develop.

github-actions[bot] commented 9 months ago

🔴 Amalgamation check failed! 🔴

The source code has not been amalgamated. @colbychaskell Please read and follow the Contribution Guidelines.

github-actions[bot] commented 9 months ago

🔴 Amalgamation check failed! 🔴

The source code has not been amalgamated. @colbychaskell Please read and follow the Contribution Guidelines.

nlohmann commented 9 months ago

Can you please try to amalgamate with an older version of astyle, like astyle 3.2? There was a breaking change in astyle which makes the output differ unfortunately.

colbychaskell commented 9 months ago

@nlohmann amalgamated with astyle 3.1 and it seems to have worked correctly now

nlohmann commented 8 months ago

Thanks!

nlohmann / json