/// <summary>
///
/// </summary>
/// <param name="Texts"></param>
/// <returns></returns>
private string Expand(string Text, Dictionary <string, string> Locals = null, HashSet <string> Used = null)
{
if (Used == null)
{
Used = new HashSet <string>();
}
string Output = "";
var Tokens = new CTokenReader(new CTokenizer(Text, TokenizeSpaces: true).Tokenize());
Tokens.MoveNextSpace();
while (Tokens.HasMore)
{
bool Stringify = false;
if (Locals != null && Tokens.Current.Raw == "##")
{
Tokens.MoveNextSpace();
}
if (Tokens.Current.Raw == "#")
{
Tokens.MoveNextSpace();
if (Tokens.Current.Type == CTokenType.Identifier)
{
Stringify = true;
}
else
{
Stringify = false;
Output += "#";
}
}
if (Tokens.Current.Type == CTokenType.Identifier)
{
var CurrentIdentifier = Tokens.Current.Raw;
var UpdatedIdentifier = ReplaceSimpleVariable(CurrentIdentifier);
if (UpdatedIdentifier != CurrentIdentifier)
{
Output += UpdatedIdentifier;
Tokens.MoveNextSpace();
continue;
}
switch (CurrentIdentifier)
{
case "__VA_ARGS__":
CurrentIdentifier = "...";
break;
}
if (Locals != null && Locals.ContainsKey(CurrentIdentifier))
{
CurrentIdentifier = Locals[CurrentIdentifier];
if (Stringify)
{
CurrentIdentifier = CToken.Stringify(CurrentIdentifier);
}
Output += CurrentIdentifier;
Tokens.MoveNextSpace();
}
else if (!Used.Contains(CurrentIdentifier) && Context.Macros.ContainsKey(CurrentIdentifier))
{
var Macro = Context.Macros[CurrentIdentifier];
// Constant
if (Macro is MacroConstant)
{
Output += Expand(Macro.Replacement, null, new HashSet <string>(Used.Concat(new[] { CurrentIdentifier })));
Tokens.MoveNextSpace();
}
// Function
else
{
Tokens.MoveNextNoSpace();
Tokens.ExpectCurrent("(");
var MacroFunction = Context.Macros[CurrentIdentifier] as MacroFunction;
if (MacroFunction == null)
{
throw (new Exception("Trying to call a non-function macro"));
}
//Console.WriteLine(":: {0} :: ", Text);
var Parameters = ParseParameterList(Tokens, JustIdentifiers: false);
for (int n = 0; n < Parameters.Length; n++)
{
//Console.WriteLine(" {0}", Parameters[n]);
Parameters[n] = Expand(Parameters[n], Locals, Used);
//Console.WriteLine(" -> {0}", Parameters[n]);
}
var Map = MapFunctionParameters(MacroFunction.Parameters, Parameters);
//foreach (var Item in Map) Console.WriteLine("{0} -> {1}", Item.Key, Item.Value);
Output += Expand(MacroFunction.Replacement, Map, new HashSet <string>(new[] { CurrentIdentifier }));
}
}
else
{
Output += CurrentIdentifier;
Tokens.MoveNextSpace();
}
}
else
{
Output += Tokens.Current.Raw;
Tokens.MoveNextSpace();
}
}
return(Output);
}
