/// <summary>
/// Initializes a new instance of the <see cref="TypedExpression"/> class.
/// </summary>
/// <param name="type">The specific type of the wrapped expression.</param>
/// <param name="expression">The wrapped expression.</param>
public TypedExpression(CodeSpan type, Expression expression)
{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
this.Type = type;
this.Expression = expression;
}
/// <summary>
/// Initializes a new instance of the <see cref="TypedExpression"/> class.
/// </summary>
/// <param name="type">The specific type of the wrapped expression.</param>
/// <param name="expression">The wrapped expression.</param>
public TypedExpression(CodeSpan type, Expression expression)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
this.type = type;
if (expression == null)
{
throw new ArgumentNullException("expression");
}
this.expression = expression;
}
/// <summary>
/// Initializes a new instance of the <see cref="Quantifier"/> class.
/// </summary>
/// <param name="start">The cursor just before the <see cref="Quantifier"/>.</param>
/// <param name="end">The cursor just after the <see cref="Quantifier"/>.</param>
/// <param name="min">The minimum number of times to match.</param>
/// <param name="max">The maximum number of times to match, if limited; or null, otherwise.</param>
/// <param name="delimiter">The expression to use as a delimiter.</param>
public Quantifier(Cursor start, Cursor end, int min, int? max = null, Expression delimiter = null)
{
if (start == null)
{
throw new ArgumentNullException(nameof(start));
}
if (end == null)
{
throw new ArgumentNullException(nameof(end));
}
this.Start = start;
this.End = end;
this.Min = min;
this.Max = max;
if (delimiter != null)
{
SequenceExpression sequenceExpression;
if ((sequenceExpression = delimiter as SequenceExpression) == null || sequenceExpression.Sequence.Count != 0)
{
this.Delimiter = delimiter;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="NotExpression"/> class.
/// </summary>
/// <param name="expression">An expression that must not match at a location for this expression to match at that location.</param>
public NotExpression(Expression expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
this.expression = expression;
}
/// <summary>
/// Initializes a new instance of the <see cref="AndExpression"/> class.
/// </summary>
/// <param name="expression">An expression that must match at a location for this expression to match at that location.</param>
public AndExpression(Expression expression)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
this.Expression = expression;
}
public override void WalkExpression(Expression expression)
{
bool? starting;
if (!this.containsAssertions.TryGetValue(expression, out starting))
{
this.containsAssertions[expression] = starting;
}
base.WalkExpression(expression);
this.changed = this.changed || starting != this.containsAssertions[expression];
}
public Rule(Identifier identifier, Expression expression, IEnumerable<Identifier> flags)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
this.identifier = identifier;
this.expression = expression;
this.flags = flags.ToList().AsReadOnly();
}
public override void WalkExpression(Expression expression)
{
bool? starting;
if (!this.zeroWidth.TryGetValue(expression, out starting))
{
this.zeroWidth[expression] = starting;
}
base.WalkExpression(expression);
this.changed = this.changed || starting != this.zeroWidth[expression];
}
public override void WalkExpression(Expression expression)
{
if (!this.types.ContainsKey(expression))
{
base.WalkExpression(expression);
this.changed = this.changed || this.types.ContainsKey(expression);
}
else
{
base.WalkExpression(expression);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="PrefixedExpression"/> class.
/// </summary>
/// <param name="prefix">The name given to this expression as a prefix.</param>
/// <param name="expression">The expression that has been prefixed.</param>
public PrefixedExpression(Identifier prefix, Expression expression)
{
if (prefix == null)
{
throw new ArgumentNullException(nameof(prefix));
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
this.Prefix = prefix;
this.Expression = expression;
}
/// <summary>
/// Initializes a new instance of the <see cref="RepetitionExpression"/> class.
/// </summary>
/// <param name="expression">The expression to be repeatedly matched.</param>
/// <param name="quantifier">The quantifier that specifies how many times to match and the delimiter of the matches.</param>
public RepetitionExpression(Expression expression, Quantifier quantifier)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (quantifier == null)
{
throw new ArgumentNullException(nameof(quantifier));
}
this.Expression = expression;
this.Quantifier = quantifier;
}
/// <summary>
/// Initializes a new instance of the <see cref="RepetitionExpression"/> class.
/// </summary>
/// <param name="expression">The expression to be repeatedly matched.</param>
/// <param name="quantifier">The quantifier that specifies how many times to match and the delimiter of the matches.</param>
public RepetitionExpression(Expression expression, Quantifier quantifier)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
if (quantifier == null)
{
throw new ArgumentNullException("quantifier");
}
this.expression = expression;
this.quantifier = quantifier;
}
public Rule(Identifier identifier, Expression expression, IEnumerable<Identifier> flags)
{
if (identifier == null)
{
throw new ArgumentNullException(nameof(identifier));
}
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
this.Identifier = identifier;
this.Expression = expression;
this.Flags = (flags ?? Enumerable.Empty<Identifier>()).ToList().AsReadOnly();
}
/// <summary>
/// Initializes a new instance of the <see cref="Quantifier"/> class.
/// </summary>
/// <param name="start">The cursor just before the <see cref="Quantifier"/>.</param>
/// <param name="end">The cursor just after the <see cref="Quantifier"/>.</param>
/// <param name="min">The minimum number of times to match.</param>
/// <param name="max">The maximum number of times to match, if limited; or null, otherwise.</param>
/// <param name="delimiter">The expression to use as a delimiter.</param>
public Quantifier(Cursor start, Cursor end, int min, int? max = null, Expression delimiter = null)
{
this.start = start;
this.end = end;
this.min = min;
this.max = max;
if (delimiter != null)
{
SequenceExpression sequenceExpression;
if ((sequenceExpression = delimiter as SequenceExpression) == null || sequenceExpression.Sequence.Count != 0)
{
this.delimiter = delimiter;
}
}
}
private void Set(Expression expression, Expression toCopy, Func<object, object> map = null)
{
map = map ?? (t => t);
object type;
if (!this.types.ContainsKey(expression) && this.types.TryGetValue(toCopy, out type))
{
this.types[expression] = map(type);
}
}
private void Set(Expression expression, object value)
{
if (!this.types.ContainsKey(expression))
{
this.types[expression] = value;
}
}
private void WalkExpression(Expression expression, TextWriter writer, string indentation)
{
var temp = this.currentIndentation;
this.currentIndentation = indentation;
this.WalkExpression(expression);
this.currentIndentation = temp;
}
public virtual void WalkExpression(Expression expression)
{
this.expressionDispatcher(expression);
}
public override void WalkExpression(Expression expression)
{
this.leftAdjacent[this.currentRule].Add(expression);
base.WalkExpression(expression);
}
