Bug processing "jsonlines".

[wiluite]

Describe the bug

Sooner, in version 0.177 (or so), I'd uncommented lines:
read_mulitple_json_objects();
read_json_lines();

in json_reader_examples.cpp source.

And these ndjson (so called "jsonlines") examples worked as expected.

However, right now, they don't process exactly one line - the last one.
Is it possible to fix this? (I'm guessing they are commented out and not necessarily working, but they did work before.)

expected behavior: Output to a stream the last line also proccessed.
actual behavior: It does not output the last line as processed.

Enumerate the steps to reproduce the bug

• uncomment read_mulitple_json_objects() in json_reader_examples.cpp sample, build, run.

What compiler, architecture, and operating system?

• Compiler: MinGW
• Architecture (e.g. x86, x64) x64
• Operating system: Windows 11

What jsoncons library version?

• [ x] master

[danielaparker]

Thanks for reporting that. The behavior of the basic_json_parser::eof() function changed in 1.0.0, that change should have been reflected in the CHANGELOG and examples, but was overlooked. Until 1.0.0, the example had to be written as

while (!reader.eof())   
{
    reader.read_next();
    if (!reader.eof())
    {
        json j = decoder.get_result();
        std::cout << j << '\n';
    }
}

Since 1.0.0, it needs to be written as

while (!reader.eof())   
{
    reader.read_next();  
    json j = decoder.get_result();
    std::cout << j << '\n';
}

[wiluite]

Oh, I could have guessed to write the cycle differently because the previous variant looks a little stange. Thanks!