/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
if (parent is NotTestAST)
{
if (IsExtended)
sb.AppendFormat("\\P{{scx={0}}}", Script.Abbreviation());
else
sb.AppendFormat("\\P{{sc={0}}}", Script.Abbreviation());
}
else
{
if (IsExtended)
sb.AppendFormat("\\p{{scx={0}}}", Script.Abbreviation());
else
sb.AppendFormat("\\p{{sc={0}}}", Script.Abbreviation());
}
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
if (parent is NotTestAST)
sb.Append("\\P{");
else
sb.Append("\\p{");
sb.Append(Category.Abbreviation());
sb.Append("}");
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
sb.Append(Property.Abbreviation(!(parent is NotTestAST)));
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(StringBuilder sb, RegexAST parent)
{
Argument.Write(sb, this);
}
/// <summary>Indicates whether the instruction is generated from a regex as part of a derivative.</summary>
/// <param name="ast">A regex from which the instruction may have been generated.</param>
/// <returns><c>true</c> if <paramref name="ast"/> is the origin of this instruction, otherwise <c>false</c>.</returns>
public virtual bool ComesFrom(RegexAST ast)
{
return false;
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(StringBuilder sb, RegexAST parent)
{
}
private static RegexAST Quantifier(string text, RegexOptions opts, ref int pos, RegexAST baseAst)
{
bool greedy = true;
int min = -1, max = -1;
if (pos >= text.Length)
return baseAst;
else switch (text[pos])
{
case '?': pos++; min = 0; max = 1; break;
case '*': pos++; min = 0; break;
case '+': pos++; min = 1; break;
case '{':
pos++;
if (pos >= text.Length)
throw new RegexParseException(text, pos, "unterminated quantifier");
min = ReadNumber(text, ref pos);
if (pos >= text.Length)
throw new RegexParseException(text, pos, "unterminated quantifier");
else if (text[pos] == '}')
{
pos++;
max = min;
}
else if (text[pos] == ',')
{
pos++;
if (pos >= text.Length)
throw new RegexParseException(text, pos, "unterminated quantifier");
else if (text[pos] != '}')
{
max = ReadNumber(text, ref pos);
if (pos >= text.Length || text[pos] != '}')
throw new RegexParseException(text, pos, "unterminated quantifier");
}
pos++;
}
else
throw new RegexParseException(text, pos, "unterminated quantifier");
break;
}
if (min != max)
{
greedy = !(pos < text.Length && text[pos] == '?');
if (!greedy) pos++;
}
if (min < 0)
return baseAst;
else if (max >= 0 && max < min)
throw new RegexParseException(text, pos, "max repeats less than min repeats");
else
return Quantifier(text, opts, ref pos, QuantifierAST.Make(baseAst, min, max, greedy));
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
sb.AppendFormat("\\g{0:d}", Source.CaptureID);
sb.Append("{0}");
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
if (FoldsCase)
sb.Append("(?i)");
sb.Append("\\");
if (Name == null || CaptureID.ToString() == Name)
{
sb.Append(CaptureID.ToString());
}
else
{
sb.Append("m{");
sb.Append(Name);
sb.Append("}");
}
}
/// <summary>Initializes and compiles a regular expression, with options that modify the pattern.</summary>
/// <param name="regexRep">The pattern to be compiled.</param>
/// <param name="opts">The options desired.</param>
/// <exception cref="ArgumentException"><paramref name="regexRep"/> is an ill-formed pattern.</exception>
internal NFABuilder(string regexRep, RegexOptions opts)
{
pending = new Queue<ASTTransition>();
visited = new Dictionary<RegexAST, int>();
instructIndex = ast =>
{
Instructions.Add(ast.ToInstruction(this));
return Instructions.Count - 1;
};
instructIndex = instructIndex.Memoize();
ParseInfo = new AnnotationVisitor(regexRep);
SyntaxTree = Parser.Parse(regexRep, opts);
SyntaxTree.Annotate(ParseInfo);
IgnoreCase = (opts & RegexOptions.IgnoreCase) != 0;
}
public override bool ComesFrom(RegexAST ast)
{
StarAST starAST = ast as StarAST;
if (starAST != null)
return ComesFrom(starAST.Argument);
QuantifierAST quantAST = ast as QuantifierAST;
if (quantAST != null)
return ComesFrom(quantAST.Argument);
return Source.Equals(ast);
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
if (FoldsCase)
sb.Append("(?i)");
string rangeName = String.Format("{0}-{1}", Parser.EscapeChar(Min, true), Parser.EscapeChar(Max, true));
if (parent is NotTestAST)
sb.AppendFormat("[^{0}]", rangeName);
else if (parent is OrTestAST)
sb.AppendFormat(rangeName);
else
sb.AppendFormat("[{0}]", rangeName);
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
if (FoldsCase)
sb.Append("(?i)");
if (parent is NotTestAST)
sb.AppendFormat("[^{0}]", Parser.EscapeChar(Character, true));
else if (parent is OrTestAST)
sb.Append(Parser.EscapeChar(Character, true));
else
sb.Append(Parser.EscapeChar(Character, false));
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(StringBuilder sb, RegexAST parent)
{
sb.Append((parent is NotTestAST) ? "\\P{Any}" : "\\p{Any}");
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(StringBuilder sb, RegexAST parent)
{
bool parens = !(parent is OrTestAST || parent is AndTestAST);
if (parens)
{
sb.Append("[");
if (parent is NotTestAST) sb.Append("^");
}
Left.Write(sb, this);
sb.Append("&&");
Right.Write(sb, this);
if (parens) sb.Append("]");
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
if (Source.FoldsCase)
sb.Append("(?i)");
sb.AppendFormat("\\g{0:d}", Source.CaptureID);
}
/// <summary>Indicates whether the start of the instruction was generated from a regex as part of a derivative.</summary>
/// <param name="ast">A regex from which <see cref="Left"/> may have been generated.</param>
/// <returns><c>true</c> if <paramref name="ast"/> is the origin of <see cref="Left"/>, otherwise <c>false</c>.</returns>
public override bool ComesFrom(RegexAST ast)
{
return Left.ComesFrom(ast);
}
/// <summary>Flattens the syntax tree into a representation of the source regex.</summary>
/// <param name="sb">Buffer for the output string.</param>
/// <param name="parent">The tree, if any, containing this syntax tree.</param>
public override void Write(System.Text.StringBuilder sb, RegexAST parent)
{
sb.Append((parent is NotTestAST) ? "\\C{" : "\\c{");
sb.Append(Index);
sb.Append("}");
}
