public void It_Can_Expect_A_Sequence_Of_Tokens()
{
IEnumerable <RuleResult> SequenceRule(CurrentTokenCallback t)
{
yield return(Expect.Symbol(t(), "("));
yield return(Expect.Symbol(t(), ")"));
yield return(Expect.Symbol(t(), "{", true));
}
var parser = new RuleCoroutineParser(SequenceRule);
var tokens = new[]
{
"(",
")",
"{"
}.Select(t => new Token(new CodePos(0, 0), TokenType.Symbol, t));
// Feed all the tokens to the parser
RuleResult result = default;
foreach (Token t in tokens)
{
result = parser.FeedToken(t);
}
// Assert that it completed and returned the node.
// In this test, the "node" is just a boolean.
result.AssertComplete();
Assert.Equal(true, result.node);
}
public static TNode AssertComplete <TNode>(this RuleResult result)
{
if (result.status == RuleStatus.Failed)
{
throw result.error;
}
var node = result.AssertComplete();
return(Assert.IsAssignableFrom <TNode>(node));
}
