examples/minimal.json in the source tree:
// The smallest useful FSON file: a root object with one member.
{
greeting: "hello fson"
}
What each line does
| Line | Feature |
|---|---|
// The smallest… | a line comment — the one thing here that is not plain JSON |
{ … } | a root object — the most common FSON document shape |
greeting: | a bare-name key — greeting matches [A-Za-z](_?[A-Za-z0-9])*, so no quotes |
"hello fson" | a string value |
Strip the comment and this is valid JSON. Keep it and it is valid JSON5 and valid FSON.
Reading it
auto r = Fson::load( "minimal.json" );
r.document->getString( "greeting", "" ); // "hello fson"
Round-trip
fson-check minimal.json
prints the file back essentially unchanged — the comment stays above the object, the bare key stays bare.
