/// <summary>
/// Tries to parse a batch of similar syntactic items with specified delimiter.
/// </summary>
public bool ParseMany(SyntacticState state, SyntacticItem part, SyntacticItem delimiter)
{
return Parse(
(syntacticState, args) => ParseManyInternal(syntacticState, args[0], args[1]),
state,
new[] { part, delimiter });
}
/// <summary>
/// Tries to parse a batch of similar syntactic items with specified delimiter.
/// </summary>
private bool ParseManyInternal(SyntacticState state, SyntacticItem part, SyntacticItem delimiter)
{
int innerIndex = state.InnerPosition;
int outerIndex = state.OuterPosition;
if (!part.Parse(state))
{
return(false);
}
while (true)
{
int lastInnerIndex = state.InnerPosition;
int lastOuterIndex = state.OuterPosition;
if (delimiter != null)
{
if (!delimiter.Parse(state))
{
break;
}
}
if (!part.Parse(state))
{
state.Reset(lastInnerIndex, lastOuterIndex);
break;
}
}
state.AddBack(Key, innerIndex, outerIndex);
return(true);
}
/// <summary>
/// Tries to parse a batch of similar syntactic items with specified delimiter.
/// </summary>
public bool ParseMany(SyntacticState state, SyntacticItem part, SyntacticItem delimiter)
{
return(Parse(
(syntacticState, args) => ParseManyInternal(syntacticState, args[0], args[1]),
state,
new[] { part, delimiter }));
}
/// <summary>
/// Checks whether specified data string can be fully parsed to the syntactic item.
/// </summary>
public void Check(bool expected, SyntacticItem item, string data)
{
bool result = Parse(item, data);
if (expected != result)
{
throw new AssertFailedException(
String.Format(
"Checking for [{0}] failed. Expected:<{1}>. Actual:<{2}>.",
data.ToDisplay(),
expected,
!expected));
}
}
/// <summary>
/// Tries to parse specified data as a syntactic item.
/// </summary>
public static bool TryParse(SyntacticItem item, string data)
{
LexicalState lexicalState = new LexicalState(data);
if (!Input.S.ParseFull(lexicalState))
return false;
SyntacticState syntacticState = new SyntacticState(
lexicalState.ExtractTokens(),
data);
if (!item.ParseFull(syntacticState))
return false;
return true;
}
/// <summary>
/// Execute parsing method checking research deep.
/// </summary>
private static bool Parse(ParseDelegate action, SyntacticState state, SyntacticItem[] args)
{
state.Deep++;
#if DEBUG
Debug.WriteLine(String.Empty);
Debug.WriteLine(state.GetOuterDebug());
SyntacticItem debugItem = (SyntacticItem)action.Target;
Debug.WriteLine("[{0}] ({1})", debugItem.Key, state.Deep);
string debugMethod = action.Method.Name;
debugMethod = debugMethod
.Split(
new[] { "Parse", "Internal", "<", ">" },
StringSplitOptions.RemoveEmptyEntries)
.First()
.ToUpperInvariant();
Debug.Write(debugMethod);
Debug.Write(" =");
foreach (var arg in args.Where(arg => arg != null))
{
Debug.Write(" | ");
Debug.Write(arg.Key);
}
Debug.WriteLine(String.Empty);
#endif
if (state.Deep >= c_maxResearchDeep)
{
throw new InvalidOperationException(
String.Format("Maximum research deep {0} has been reached.", c_maxResearchDeep));
}
bool parsed = action.Invoke(state, args);
state.Deep--;
return(parsed);
}
/// <summary>
/// Tries to parses specified data string into syntactic item.
/// </summary>
protected override bool Parse(SyntacticItem item, string data)
{
return CSharpParser.TryParse(item, data);
}
/// <summary>
/// Ensures that specified data could be parsed as a syntactic item.
/// </summary>
public static void Ensure(SyntacticItem item, string data)
{
if (!TryParse(item, data))
throw new InvalidOperationException();
}
/// <summary> /// Tries to parses specified data string into syntactic item. /// </summary> protected abstract bool Parse(SyntacticItem item, string data);
/// <summary>
/// Execute parsing method checking research deep.
/// </summary>
private static bool Parse(ParseDelegate action, SyntacticState state, SyntacticItem[] args)
{
state.Deep++;
#if DEBUG
Debug.WriteLine(String.Empty);
Debug.WriteLine(state.GetOuterDebug());
SyntacticItem debugItem = (SyntacticItem)action.Target;
Debug.WriteLine("[{0}] ({1})", debugItem.Key, state.Deep);
string debugMethod = action.Method.Name;
debugMethod = debugMethod
.Split(
new[] { "Parse", "Internal", "<", ">" },
StringSplitOptions.RemoveEmptyEntries)
.First()
.ToUpperInvariant();
Debug.Write(debugMethod);
Debug.Write(" =");
foreach (var arg in args.Where(arg => arg != null))
{
Debug.Write(" | ");
Debug.Write(arg.Key);
}
Debug.WriteLine(String.Empty);
#endif
if (state.Deep >= c_maxResearchDeep)
throw new InvalidOperationException(
String.Format("Maximum research deep {0} has been reached.", c_maxResearchDeep));
bool parsed = action.Invoke(state, args);
state.Deep--;
return parsed;
}
/// <summary>
/// Tries to parse a batch of similar syntactic items with specified delimiter.
/// </summary>
private bool ParseManyInternal(SyntacticState state, SyntacticItem part, SyntacticItem delimiter)
{
int innerIndex = state.InnerPosition;
int outerIndex = state.OuterPosition;
if (!part.Parse(state))
return false;
while (true)
{
int lastInnerIndex = state.InnerPosition;
int lastOuterIndex = state.OuterPosition;
if (delimiter != null)
{
if (!delimiter.Parse(state))
break;
}
if (!part.Parse(state))
{
state.Reset(lastInnerIndex, lastOuterIndex);
break;
}
}
state.AddBack(Key, innerIndex, outerIndex);
return true;
}