internal sealed override InternalResult <R> Parse(ref ParseState <TToken> state)
{
var consumedInput = false;
var result1 = _p1.Parse(ref state);
consumedInput = consumedInput || result1.ConsumedInput;
if (!result1.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
var result2 = _p2.Parse(ref state);
consumedInput = consumedInput || result2.ConsumedInput;
if (!result2.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
var result3 = _p3.Parse(ref state);
consumedInput = consumedInput || result3.ConsumedInput;
if (!result3.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
var result4 = _p4.Parse(ref state);
consumedInput = consumedInput || result4.ConsumedInput;
if (!result4.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
var result5 = _p5.Parse(ref state);
consumedInput = consumedInput || result5.ConsumedInput;
if (!result5.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
var result6 = _p6.Parse(ref state);
consumedInput = consumedInput || result6.ConsumedInput;
if (!result6.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
var result7 = _p7.Parse(ref state);
consumedInput = consumedInput || result7.ConsumedInput;
if (!result7.Success)
{
return(InternalResult.Failure <R>(consumedInput));
}
return(InternalResult.Success <R>(_func(
result1.Value,
result2.Value,
result3.Value,
result4.Value,
result5.Value,
result6.Value,
result7.Value
), consumedInput));
}
internal sealed override bool TryParse(ref ParseState <TToken> state, ref ExpectedCollector <TToken> expecteds, out R result)
{
var success1 = _p1.TryParse(ref state, ref expecteds, out var result1);
if (!success1)
{
result = default;
return(false);
}
var success2 = _p2.TryParse(ref state, ref expecteds, out var result2);
if (!success2)
{
result = default;
return(false);
}
var success3 = _p3.TryParse(ref state, ref expecteds, out var result3);
if (!success3)
{
result = default;
return(false);
}
var success4 = _p4.TryParse(ref state, ref expecteds, out var result4);
if (!success4)
{
result = default;
return(false);
}
var success5 = _p5.TryParse(ref state, ref expecteds, out var result5);
if (!success5)
{
result = default;
return(false);
}
var success6 = _p6.TryParse(ref state, ref expecteds, out var result6);
if (!success6)
{
result = default;
return(false);
}
var success7 = _p7.TryParse(ref state, ref expecteds, out var result7);
if (!success7)
{
result = default;
return(false);
}
result = _func(
result1,
result2,
result3,
result4,
result5,
result6,
result7
);
return(true);
}
private static Result <TToken, T> DoParse <TToken, T>(Parser <TToken, T> parser, ref ParseState <TToken> state)
{
var internalResult = parser.Parse(ref state);
var result = internalResult.Success
? new Result <TToken, T>(internalResult.ConsumedInput, internalResult.Value)
: new Result <TToken, T>(internalResult.ConsumedInput, state.BuildError());
state.Dispose(); // ensure we return the state's buffers to the buffer pool
return(result);
}
internal override InternalResult <SourcePos> Parse(ref ParseState <TToken> state) => InternalResult.Success(state.ComputeSourcePos(), false);
private InternalResult <IEnumerable <T> > Rest(Parser <TToken, T> parser, ref ParseState <TToken> state, List <T> ts, bool consumedInput)
{
var result = parser.Parse(ref state);
while (result.Success)
{
if (!result.ConsumedInput)
{
throw new InvalidOperationException("Many() used with a parser which consumed no input");
}
consumedInput = true;
ts?.Add(result.Value);
result = parser.Parse(ref state);
}
if (result.ConsumedInput) // the most recent parser failed after consuming input
{
// state.Error set by parser
return(InternalResult.Failure <IEnumerable <T> >(true));
}
return(InternalResult.Success <IEnumerable <T> >(ts, consumedInput));
}
private static Result <TToken, T> DoParse <TToken, T>(Parser <TToken, T> parser, ITokenStream <TToken> stream, Func <TToken, SourcePos, SourcePos> calculatePos)
{
var state = new ParseState <TToken>(calculatePos, stream);
return(DoParse(parser, ref state));
}
// see comment about expecteds in ParseState.Error.cs
public override InternalResult <IEnumerable <T>?> Parse(ref ParseState <TToken> state)
{
var ts = _keepResults ? new List <T>() : null;
var firstItemResult = _parser.Parse(ref state);
if (!firstItemResult.Success)
{
// state.Error set by _parser
return(InternalResult.Failure <IEnumerable <T>?>(firstItemResult.ConsumedInput));
}
if (!firstItemResult.ConsumedInput)
{
throw new InvalidOperationException("Until() used with a parser which consumed no input");
}
ts?.Add(firstItemResult.Value);
while (true)
{
state.BeginExpectedTran();
var terminatorResult = _terminator.Parse(ref state);
if (terminatorResult.Success)
{
state.EndExpectedTran(false);
return(InternalResult.Success <IEnumerable <T>?>(ts, true));
}
if (terminatorResult.ConsumedInput)
{
// state.Error set by _terminator
state.EndExpectedTran(true);
return(InternalResult.Failure <IEnumerable <T>?>(true));
}
state.BeginExpectedTran();
var itemResult = _parser.Parse(ref state);
if (!itemResult.Success)
{
if (!itemResult.ConsumedInput)
{
// get the expected from both _terminator and _parser
state.EndExpectedTran(true);
state.EndExpectedTran(true);
}
else
{
// throw out the _terminator expecteds and keep only _parser
var itemExpected = state.ExpectedTranState();
state.EndExpectedTran(false);
state.EndExpectedTran(false);
state.AddExpected(itemExpected.AsSpan());
itemExpected.Dispose(clearArray: true);
}
return(InternalResult.Failure <IEnumerable <T>?>(true));
}
// throw out both sets of expecteds
state.EndExpectedTran(false);
state.EndExpectedTran(false);
if (!itemResult.ConsumedInput)
{
throw new InvalidOperationException("Until() used with a parser which consumed no input");
}
ts?.Add(itemResult.Value);
}
}
internal sealed override InternalResult <T> Parse(ref ParseState <TToken> state) => _lazy.Value.Parse(ref state);
internal sealed override InternalResult <T> Parse(ref ParseState <TToken> state) => InternalResult.Success <T>(_value, false);
internal sealed override bool TryParse(ref ParseState <TToken> state, ref ExpectedCollector <TToken> expecteds, out T result) => _lazy.Value.TryParse(ref state, ref expecteds, out result);
private static Result <TToken, T> DoParse <TToken, T>(Parser <TToken, T> parser, ref ParseState <TToken> state)
{
var startingLoc = state.Location;
var expecteds = new ExpectedCollector <TToken>();
var success = parser.TryParse(ref state, ref expecteds, out var result);
var result1 = success
? new Result <TToken, T>(state.Location > startingLoc, result)
: new Result <TToken, T>(state.Location > startingLoc, state.BuildError(ref expecteds));
expecteds.Dispose();
state.Dispose(); // ensure we return the state's buffers to the buffer pool
return(result1);
}
// see comment about expecteds in ParseState.Error.cs
internal sealed override bool TryParse(ref ParseState <TToken> state, ref ExpectedCollector <TToken> expecteds, out IEnumerable <T>?result)
{
var ts = _keepResults ? new List <T>() : null;
var firstItemStartLoc = state.Location;
var firstItemSuccess = _parser.TryParse(ref state, ref expecteds, out var result1);
if (!firstItemSuccess)
{
// state.Error set by _parser
result = null;
return(false);
}
if (state.Location <= firstItemStartLoc)
{
throw new InvalidOperationException("Until() used with a parser which consumed no input");
}
ts?.Add(result1);
var terminatorExpecteds = new ExpectedCollector <TToken>();
var itemExpecteds = new ExpectedCollector <TToken>();
while (true)
{
var terminatorStartLoc = state.Location;
var terminatorSuccess = _terminator.TryParse(ref state, ref terminatorExpecteds, out var terminatorResult);
if (terminatorSuccess)
{
terminatorExpecteds.Dispose();
itemExpecteds.Dispose();
result = ts;
return(true);
}
if (state.Location > terminatorStartLoc)
{
// state.Error set by _terminator
expecteds.Add(ref terminatorExpecteds);
terminatorExpecteds.Dispose();
itemExpecteds.Dispose();
result = null;
return(false);
}
var itemStartLoc = state.Location;
var itemSuccess = _parser.TryParse(ref state, ref itemExpecteds, out var itemResult);
var itemConsumedInput = state.Location > itemStartLoc;
if (!itemSuccess)
{
if (!itemConsumedInput)
{
// get the expected from both _terminator and _parser
expecteds.Add(ref terminatorExpecteds);
expecteds.Add(ref itemExpecteds);
}
else
{
// throw out the _terminator expecteds and keep only _parser
expecteds.Add(ref itemExpecteds);
}
terminatorExpecteds.Dispose();
itemExpecteds.Dispose();
result = null;
return(false);
}
// throw out both sets of expecteds
terminatorExpecteds.Clear();
itemExpecteds.Clear();
if (!itemConsumedInput)
{
throw new InvalidOperationException("Until() used with a parser which consumed no input");
}
ts?.Add(itemResult);
}
}
internal sealed override bool TryParse(ref ParseState <TToken> state, ref ExpectedCollector <TToken> expecteds, out IEnumerable <T> result)
{
var success = _parser.TryParse(ref state, ref expecteds, out var result1);
if (!success)
{
// state.Error set by _parser
result = null;
return(false);
}
var ts = new List <T> {
result1
};
var childExpecteds = new ExpectedCollector <TToken>();
while (true)
{
var sepStartLoc = state.Location;
var sepSuccess = _separator.TryParse(ref state, ref childExpecteds, out var _);
var sepConsumedInput = state.Location > sepStartLoc;
expecteds.AddIf(ref childExpecteds, !sepSuccess && sepConsumedInput);
childExpecteds.Clear();
if (!sepSuccess)
{
childExpecteds.Dispose();
if (sepConsumedInput)
{
// state.Error set by _separator
result = null;
return(false);
}
result = ts;
return(true);
}
var itemStartLoc = state.Location;
var itemSuccess = _parser.TryParse(ref state, ref childExpecteds, out var itemResult);
var itemConsumedInput = state.Location > itemStartLoc;
expecteds.AddIf(ref childExpecteds, !itemSuccess && itemConsumedInput);
childExpecteds.Clear();
if (!itemSuccess)
{
childExpecteds.Dispose();
if (itemConsumedInput)
{
// state.Error set by _parser
result = null;
return(false);
}
result = ts;
return(true);
}
ts.Add(itemResult);
}
}
