// ReSharper disable once UnusedMember.Local
private bool ExpectNextToken(IPeekableEnumerator <Token> tokens, Token.Tokens ident)
{
if (tokens.PeekNext?.Type != ident)
{
AddError(string.Format("expected {0}, got {1} instead",
ident,
tokens.PeekNext?.ToString() ?? "<EOF>"));
return(false);
}
return(true);
}
private Token ExpectTokenAndAdvance(IPeekableEnumerator <Token> tokens, Token.Tokens ident)
{
var currentToken = tokens.Current;
if (currentToken?.Type != ident)
{
AddError(string.Format("expected {0}, got {1} instead",
ident,
currentToken?.ToString() ?? "<EOF>"));
return(null);
}
tokens.MoveNext();
return(currentToken);
}
// ReSharper disable once UnusedMember.Local
private void RegisterInfixParserFn(Token.Tokens tokens, InfixParserFn fn)
{
_infixParserFns[tokens] = fn;
}
private void RegisterPrefixParserFn(Token.Tokens tokens, PrefixParserFn fn)
{
_prefixParserFns[tokens] = fn;
}