When JSON-encoding a float denoting a whole number, the number is encoded as an integer. Consider the following example:
void main() {
auto jv1 = JSONValue(4.0);
auto textual = jv1.toString();
auto jv2 = parseJSON(textual);
writeln(jv1.type); // FLOAT
writeln(textual); // "4"
writeln(jv2.type); // INTEGER
}
This is due to the following code in std.json.toJSON:
case JSON_TYPE.FLOAT:
json.put(to!string(value.store.floating));
break;
to!string(4.0) returns "4", disregarding the fact it was a float. A simple fix would be to append ".0" if the string representation does not contain a dot.
This currently breaks my code, where I expect a value to be a floating point number, but I have to try getting it either as an integer or a float.
Comment #1 by b2.temp — 2016-12-30T08:48:03Z
There's a pull for the most recent dup so it's more simple to close this one.
*** This issue has been marked as a duplicate of issue 16432 ***