void OnEvaluate()
{
Result = "";
TerminalReader.Open(Expression);
Prolog.Clause result = (Prolog.Clause)Parser.Parse(TerminalReader);
if (result != null)
{
Terminal token = TerminalReader.ReadTerminal();
while (token != null)
{
if (!token.ElementType.Ignore)
{
Result += $"{token.ElementType.Name}: {token.Text}" + Environment.NewLine;
}
}
token = TerminalReader.ReadTerminal();
//Result = result; //.Value.ToString();
}
LinguaTrace.TraceSource.Flush();
}
public void CreateParser()
{
Assembly assembly = Assembly.GetAssembly(typeof(Form1));
var grammar = new Grammar();
grammar.Load(assembly, "Calculator");
grammar.LoadRules(assembly, "Calculator");
grammar.Resolve();
Trace.WriteLine("TERMINALS");
foreach (var terminal in grammar.GetTerminals())
{
Trace.WriteLine(terminal.Name);
var sb = new StringBuilder();
sb.Append(" First:");
foreach (var first in terminal.First)
{
sb.Append(" ");
sb.Append(first == null ? "e" : first.Name);
}
Trace.WriteLine(sb.ToString());
}
Trace.WriteLine("NONTERMINALS");
foreach (var nonterminal in grammar.GetNonterminals())
{
Trace.WriteLine(nonterminal.Name);
foreach (var rule in nonterminal.Rules)
{
Trace.WriteLine(" " + rule.ToString());
}
var sb = new StringBuilder();
sb.Append(" First:");
foreach (var first in nonterminal.First)
{
sb.Append(" ");
sb.Append(first == null ? "e" : first.Name);
}
Trace.WriteLine(sb.ToString());
sb = new StringBuilder();
sb.Append(" Follow:");
foreach (var first in nonterminal.Follow)
{
sb.Append(" ");
sb.Append(first == null ? "e" : first.Name);
}
Trace.WriteLine(sb.ToString());
}
ITerminalReaderGenerator terminalReaderGenerator = new TerminalReaderGenerator();
TerminalReaderGeneratorResult terminalReaderGeneratorResult =
terminalReaderGenerator.GenerateTerminalReader(grammar);
this.m_terminalReader = (TerminalReader)terminalReaderGeneratorResult.TerminalReader;
IParserGenerator parserGenerator = new ParserGenerator();
ParserGeneratorResult parserGeneratorResult = parserGenerator.GenerateParser(grammar);
this.m_parser = (Parser)parserGeneratorResult.Parser;
ITerminalReader terminalReader = terminalReaderGeneratorResult.TerminalReader;
terminalReader.Open("(123 + 34) / 52");
IParser parser = parserGeneratorResult.Parser;
parser.Parse(terminalReader);
var token = terminalReader.ReadTerminal();
while (token != null)
{
if (!token.ElementType.Ignore)
{
Console.WriteLine("{0}: {1}", token.ElementType.Name, token.Text);
}
token = terminalReader.ReadTerminal();
}
//Console.WriteLine("Press Enter to exit.");
//Console.ReadLine();
}
public static byte?ReadRaw(this TerminalReader reader)
{
_ = reader ?? throw new ArgumentNullException(nameof(reader));
return(reader.Driver.ReadRaw());
}
public static string?ReadLine(this TerminalReader reader)
{
_ = reader ?? throw new ArgumentNullException(nameof(reader));
return(reader.Driver.ReadLine());
}
