internal static IList <AbstractSkriptPatternElement> Flatten(AbstractSkriptPatternElement element)
{
return(element switch
{
SkriptPattern skriptPattern => skriptPattern.Children.SelectMany(Flatten).ToList(),
_ => new List <AbstractSkriptPatternElement> {
element
}
});
public static SkriptPattern ParsePattern(ParseContext ctx, bool fastFail = false)
{
var pattern = new SkriptPattern();
var literalBuilder = new StringBuilder();
void AddLiteralIfExists()
{
if (string.IsNullOrEmpty(literalBuilder.ToString()))
{
return;
}
pattern.Children.Add(new LiteralPatternElement(literalBuilder.ToString()));
literalBuilder.Clear();
}
var isNextCharEscaped = false;
foreach (var c in ctx)
{
if (c == '\\' && !isNextCharEscaped)
{
isNextCharEscaped = true;
continue;
}
var(type, info) = GroupTypes
.Select(cc => (Type: cc, Info: cc.GetCustomAttribute <GroupPatternElementInfoAttribute>()))
.FirstOrDefault(cc => cc.Item2.OpeningBracket == c);
if (!isNextCharEscaped && info != null)
{
AddLiteralIfExists();
var closingBracketPos =
ctx.FindNextBracket(info.OpeningBracket, info.ClosingBracket, escapeWithBackSlash: true);
if (closingBracketPos >= 0)
{
var innerText = ctx.ReadUntilPosition(closingBracketPos);
//Read closing bracket
ctx.ReadNext(1);
pattern.Children.Add(
Activator.CreateInstance(type, innerText) as AbstractGroupPatternElement);
}
}
else
{
var isWhiteSpace = char.IsWhiteSpace(c);
if (isWhiteSpace)
{
AddLiteralIfExists();
pattern.Children.Add(new LiteralPatternElement(c.ToString()));
}
else
{
literalBuilder.Append(c);
}
}
isNextCharEscaped = false;
}
AddLiteralIfExists();
pattern.FastFail = fastFail;
return(pattern);
}