public StringExpression(ASTNode parent, Scope scope, IList <LToken> tokens) : base(parent, scope, tokens)
{
if (this.Tokens.Count != 1)
{
throw new Exception("A StringExpression should only be composed of a single LToken of type String.");
}
LToken strtok = this.Tokens[0];
if (strtok.ID == "literalstring")
{
this.UnescapedValue = ( String )strtok.Value;
this.EscapedValue = this.UnescapedValue;
this.StartDelimiter = strtok.Raw.Substring(0, strtok.Raw.IndexOf('[', 1) + 1);
this.EndDelimiter = this.StartDelimiter.Replace('[', ']');
this.IsLiteralString = true;
}
else
{
this.StartDelimiter = strtok.Raw[0].ToString( );
this.EndDelimiter = this.StartDelimiter;
this.UnescapedValue = ( String )strtok.Value;
var unescaped = new StringBuilder( );
foreach (var c in ( String )strtok.Value)
{
if (c == this.StartDelimiter[0] || c == '\n')
{
unescaped
.Append('\\')
.Append(c);
}
else if (!LJUtils.IsGraph(c) && !LJUtils.IsSpace(c))
{
unescaped.AppendFormat("\\x{0:X2}", ( Int32 )c);
}
else
{
unescaped.Append(c);
}
}
this.EscapedValue = unescaped.ToString( );
}
}
protected override Boolean CharIsWhitepace(Char ch) => LJUtils.IsSpace(ch);