public void ArrayPeekEnumerator_ShouldWorkForTwoElements()
{
var data = new int[] { 1, 2 };
var enumerator = new ArrayPeekEnumerator <int>(data);
Assert.IsTrue(enumerator.TryPeek(out var first));
Assert.AreEqual(1, first);
Assert.IsTrue(enumerator.TryPeek2(out first, out var second));
Assert.AreEqual(1, first);
Assert.AreEqual(2, second);
Assert.IsTrue(enumerator.MoveNext());
Assert.AreEqual(1, enumerator.Current);
Assert.IsTrue(enumerator.TryPeek(out second));
Assert.IsFalse(enumerator.TryPeek2(out _, out _));
Assert.AreEqual(2, second);
Assert.IsTrue(enumerator.MoveNext());
Assert.AreEqual(2, enumerator.Current);
Assert.IsFalse(enumerator.TryPeek(out _));
Assert.IsFalse(enumerator.MoveNext());
}
public void ArrayPeekEnumerator_ShouldWorkForEmptyEnumerator()
{
var data = new int[0];
var enumerator = new ArrayPeekEnumerator <int>(data);
Assert.IsFalse(enumerator.TryPeek(out _));
Assert.IsFalse(enumerator.TryPeek2(out _, out _));
Assert.IsFalse(enumerator.MoveNext());
Assert.IsFalse(enumerator.TryPeek(out _));
Assert.IsFalse(enumerator.TryPeek2(out _, out _));
}
protected void Recover(Action code, TokenKind syncTokenKind, string syncTokenText = null)
{
recoveryScopes_.Push(new ErrorRecoveryScope(syncTokenKind, syncTokenText));
try
{
code();
}
catch (ErrorRecoveryException e) when(e.Scope == recoveryScopes_.Peek())
{
}
catch (NotImplementedException e)
{
EmitError(string.Format(Errors.NotImplemented, e.Message));
while (enumerator_.TryPeek(out var token))
{
if (CanRecoverInParentScope(token.Kind, token.Text, out var scope))
{
if (scope == recoveryScopes_.Peek())
{
return;
}
else
{
throw new ErrorRecoveryException(scope);
}
}
enumerator_.MoveNext();
}
throw new ParsingException(Errors.UnexpectedEndOfFile, Span.Empty);
}
finally
{
recoveryScopes_.Pop();
}
}