/// <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>
/// 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>
/// Returns true only if all input data has been successfully parsed.
/// </summary>
public static bool ParseFull(this SyntacticItem item, SyntacticState state)
{
bool parsed = item.Parse(state);
if (!parsed)
{
return(false);
}
if (!state.IsEndOfData)
{
return(false);
}
return(true);
}
/// <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>
/// Initializes a new instance.
/// </summary>
public Optional(SyntacticItem item)
: base(item, Empty.S)
{
}
/// <summary>
/// Tries to parses specified data string into syntactic item.
/// </summary>
protected override bool Parse(SyntacticItem item, string data)
{
return(CssParser.TryParse(item, data));
}
/// <summary>
/// Initializes a new instance.
/// </summary>
public ParseMany(SyntacticItem part)
: this(part, null)
{
}
/// <summary>
/// Initializes a new instance.
/// </summary>
public ParseMany(SyntacticItem part, SyntacticItem delimiter)
{
m_part = part;
m_delimiter = delimiter;
}
/// <summary>
/// Initializes a new instance.
/// </summary>
public ParseMany(SyntacticItem part)
: this(part, null)
{
}
/// <summary>
/// Initializes a new instance.
/// </summary>
public ParseMany(SyntacticItem part, SyntacticItem delimiter)
{
m_part = part;
m_delimiter = delimiter;
}
/// <summary> /// Tries to parses specified data string into syntactic item. /// </summary> protected abstract bool Parse(SyntacticItem item, string data);
/// <summary>
/// Initializes a new instance.
/// </summary>
public Optional(SyntacticItem item)
: base(item, Empty.S)
{
}
