private List <Token> ReplaceMethodMacro(MethodMacro method, List <Token> args)
{
// First run the replacement
List <Token> retList = method.Replace(args);
// When creating the arguments for a macro, non-trivial arguments (1+2) come accross
// as text macros. For those items we need to reparse them here and put them back into the stream.
// Have to do this after the above loop so that ## and # are processed correctly
int i = 0;
while (i < retList.Count)
{
Token cur = retList[i];
if (cur.TokenType == TokenType.Text && args.IndexOf(cur) >= 0)
{
retList.RemoveAt(i);
retList.InsertRange(i, Scanner.TokenizeText(cur.Value, _scanner.Options));
}
i += 1;
}
return(retList);
}
public bool TryEvaluate(string expr, out ExpressionValue result)
{
List <Token> list = Scanner.TokenizeText(expr, _opts);
return(TryEvaluate(list, out result));
}
private void ReplaceDefinedTokens(PreprocessorLine line)
{
ThrowIfNull(line);
int i = 0;
List <Token> list = line.TokenList;
while ((i < list.Count))
{
Token token = list[i];
if (token.TokenType != TokenType.Word)
{
i += 1;
continue;
}
Macro macro = null;
if (_macroMap.TryGetValue(token.Value, out macro))
{
// Remove the original token
list.RemoveAt(i);
List <Token> replaceList = null;
if (macro.IsMethod)
{
MethodMacro method = (MethodMacro)macro;
List <Token> args = ParseAndRemoveMacroMethodArguments(list, i);
if (args == null)
{
// Parse did not succeed, move to the next token
i += 1;
}
else
{
// Insert the tokens
replaceList = ReplaceMethodMacro(method, args);
}
}
else
{
// Use the scanner to create the replacement tokens
replaceList = Scanner.TokenizeText(macro.Value, CreateScannerOptions());
}
if (replaceList != null)
{
CollapseDoublePounds(replaceList);
list.InsertRange(i, replaceList);
}
}
else
{
i += 1;
}
}
// Do one more pass to check and see if we need a recursive replace
bool needAnotherPass = false;
foreach (Token cur in line.TokenList)
{
if (cur.TokenType == TokenType.Word && _macroMap.ContainsKey(cur.Value))
{
needAnotherPass = true;
break;
}
}
if (needAnotherPass)
{
ReplaceDefinedTokens(line);
}
}
