private Token PeekToken(int depth = 0)
{
Debug.Assert(depth >= 0); // depth can not be negative
return(depth == 0
? TokensToProcess.Peek() // for 0 depth take crrent context
: TokensProcessed.Skip(depth - 1).First()); // otherwise dig through processed tokens
}
private Token PeekToken(int depth = 0)
{
if (depth < 0)
{
throw new ArgumentOutOfRangeException("depth", "Depth can not be negative, surprisingly.");
}
return(depth == 0
? TokensToProcess.Peek() // for 0 depth take crrent context
: TokensProcessed.Skip(depth - 1).First()); // otherwise dig through processed tokens
}
private ParseState PeekContext(int depth = 0)
{
if (depth < 0)
{
throw new ArgumentOutOfRangeException("depth", "Depth can not be negative, surprisingly.");
}
return(depth == 0
? TokensToProcess.Peek().Context // for 0 depth take crrent context
: TokensProcessed.Skip(depth - 1).Take(1).Single().Context); // otherwise dig through processed tokens
}
private void ReadToken()
{
TokensProcessed.Push(TokensToProcess.Pop());
}
