public static ListTreeNode <TomlValue> Parse(Utf8String segment)
{
var values = new List <TomlValue>()
{
new TomlValue(segment, TomlValueType.Table, -1),
};
var current = 0;
while (!segment.IsEmpty)
{
segment = segment.TrimStart();
if (segment.IsEmpty)
{
break;
}
if (segment[0] == '#')
{
// comment line
// skip to line end
segment = segment.Subbytes(segment.GetLine().ByteLength);
continue;
}
if (segment.ByteLength >= 4 && segment[0] == '[' && segment[1] == '[')
{
// [[array_name]]
throw new NotImplementedException();
}
else if (segment.ByteLength >= 2 && segment[0] == '[')
{
// [table_name]
int table_end;
if (!segment.TrySearchByte(x => x == ']', out table_end))
{
throw new ParserException("] not found");
}
var table_name = segment.Subbytes(1, table_end - 1).Trim();
if (table_name.IsEmpty)
{
throw new ParserException("empty table name");
}
// top level key
values.Add(new TomlValue(table_name, TomlValueType.Table, 0));
current = values.Count - 1;
// skip to line end
segment = segment.Subbytes(segment.GetLine().ByteLength);
}
else
{
// key = value
{
var key = ParseLHS(segment, current);
switch (key.TomlValueType)
{
case TomlValueType.BareKey:
case TomlValueType.QuotedKey:
{
values.Add(key);
// skip key
segment = segment.Subbytes(key.Bytes.Count);
}
break;
case TomlValueType.DottedKey:
throw new NotImplementedException();
}
}
{
// search and skip =
int eq;
if (!segment.TrySearchByte(x => x == '=', out eq))
{
throw new ParserException("= not found");
}
segment = segment.Subbytes(eq + 1);
// skip white space
segment = segment.TrimStart();
}
{
var value = ParseRHS(segment, current);
values.Add(value);
// skip value
segment = segment.Subbytes(value.Bytes.Count);
// skip to line end
segment = segment.Subbytes(segment.GetLine().ByteLength);
}
}
}
return(new ListTreeNode <TomlValue>(values));
}