Hi, Mark Gillard.

Many thx for hight quality C++ TOML parser library. It looks I found a corner case. See description below.

Environment

master

Compiler:
AppleClang12 BigSur 11.3

C++ standard mode (e.g. 17, 20, 'latest'):
20

Target arch (e.g. x64):
x64

Library configuration overrides:
Default.

Relevant compilation flags:
-fno-exceptions

Describe the bug

Process 18945 stopped

• thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x41)
  frame #0: 0x0000000100035bbf toml_demo`toml::v2::json_formatter::print(this=0x00007ffeefbff530) at toml_json_formatter.h:91:47
  88
  89 void print()
  90 {
  -> 91 switch (auto source_type = base::source().type())
  92 {
  93 case node_type::table:
  94 print(reinterpret_cast<const table>(&base::source()));
  Target 0: (toml_demo) stopped.

Steps to reproduce (or a small repro code sample)

Compile code:

auto config = toml::parse_file( FNAME ); <-- no real TOML file here.
std::cout << toml::json_formatter{ config } << "\n";

Additional information

I think it is better to print empty json in this case: {}
What do you think about it?

Best regards, Proydakov Evgeny.