private static void Write(LuaTable table, IndentedTextWriter indentedTextWriter)
{
// Write empty tables in a single line
if (table.Count == 0)
{
indentedTextWriter.Write("{}");
return;
}
// Determine whether to use auto-indexing for numeric keys.
// Use auto-indexing if all n keys of numeric type form the sequence 1, 2, 3 .. n
bool useAutoIndexing = table
.Where(pair => pair.Key is double)
.Select((pair, index) => new { Key = (double)pair.Key, Index = index })
.All(element => element.Key == element.Index + 1);
// Serialize table
indentedTextWriter.WriteLine("{");
using (indentedTextWriter.IndentBlock()) {
var pairs = table.ToList();
for (int i = 0; i < pairs.Count; i++)
{
dynamic key = pairs[i].Key;
dynamic value = pairs[i].Value;
if (value is LuaComment)
{
// Comment. This is easy.
Write(value, indentedTextWriter);
}
else
{
// Actual entry, not a comment
if (useAutoIndexing && key is double)
{
// Use auto-indexing: omit the key
Write(value, indentedTextWriter);
}
else
{
// Use key-value syntax
if (key is string && IsValidIdentifier(key))
{
// Use identifier syntax for key
indentedTextWriter.Write(key);
}
else
{
// Use bracket syntax for key
indentedTextWriter.Write("[");
Write(key, indentedTextWriter);
indentedTextWriter.Write("]");
}
indentedTextWriter.Write(" = ");
Write(value, indentedTextWriter);
}
// Figure out whether to add a comma
if (pairs.Skip(i + 1).Any(pair => !(pair.Value is LuaComment)))
{
indentedTextWriter.WriteLine(",");
}
else
{
indentedTextWriter.WriteLine();
}
}
}
}
indentedTextWriter.Write("}");
}