public void ParseExpressionPattern(string expression)
{
var listener = new ErrorListener <IToken>();
var stream = CharStreams.fromstring(expression);
ITokenSource lexer = new SpecLexer(stream);
ITokenStream tokens = new CommonTokenStream(lexer);
var parser = new SpecParserParser(tokens);
parser.BuildParseTree = true;
parser.AddErrorListener(listener);
var spec_ast = parser.pattern();
if (listener.had_error)
{
Console.WriteLine(spec_ast.GetText());
throw new Exception();
}
var template = new Template();
_current_template = template;
template.TemplateName = "Grep";
_program._templates.Add(template);
_current_pass = new Pass();
_current_pass.Name = "Grep";
_current_pass.Owner = _current_template;
_current_template.Passes.Add(_current_pass);
_program._application.OrderedPasses.Add("Grep.Grep");
ParseTreeWalker.Default.Walk(this, spec_ast);
}
public void ParseSpecFile(string specification_file_name)
{
var listener = new ErrorListener <IToken>();
// Try current location, or template directory.
var location = specification_file_name;
if (!File.Exists(location))
{
location = Piggy._template_directory + "\\" +
specification_file_name;
if (!File.Exists(location))
{
Console.WriteLine("File " + specification_file_name + " does not exist.");
throw new Exception();
}
}
var stream = CharStreams.fromPath(location);
ITokenSource lexer = new SpecLexer(stream);
ITokenStream tokens = new CommonTokenStream(lexer);
var parser = new SpecParserParser(tokens);
parser.BuildParseTree = true;
parser.AddErrorListener(listener);
var spec_ast = parser.spec();
if (listener.had_error)
{
Console.WriteLine(spec_ast.GetText());
throw new Exception();
}
ParseTreeWalker.Default.Walk(this, spec_ast);
}
// 2.2)
public static void test22()
{
System.Console.WriteLine("Work SpecLexer:");
string[] testInput = { "a1", "aa12c23dd1", "aa1", "1a", "aa111", "aaa1", "", "as12ag231s12dd" };
Lexer L;
for (int i = 0; i < testInput.Length; ++i)
{
L = new SpecLexer(testInput[i]);
try{
L.Parse();
}
catch (LexerException e) {
System.Console.WriteLine(e.Message);
}
}
}
