public static Module ParseModule(SourceUnit sourceUnit, HappyLanguageContext languageContext)
{
Lexer lexer = new Lexer(sourceUnit, languageContext);
Parser parser = new Parser(lexer, languageContext);
Module retval = null;
try
{
retval = parser.Parse();
}
catch(AbortParseException)
{
//Left blank intentionally because AbortParseExceptions should never
//be allowed to bubble up to the caller.
}
catch(SyntaxErrorException)
{
//We actually want to allow this exception to propogate as-is back
//to the caller. This is needed because of the catch-all below
throw;
}
catch(Exception e)
{
//All other exceptions are to be considered an internal error
//We may not know the exact location of the error, but we'll just
//take the next token out of the lexer to give *some* kind of
//idea line might contain the error
DebugAssert.IsNotNull(e);
Token t = lexer.NextToken();
throw new InternalSourceException(e, t.Location,
"The parser threw an unhandled exception. This is usually caused by a syntax error " +
"in the script being parsed. The error ocurred at or before the this locaiton.");
}
return retval;
}
protected internal static Token NextTokenAssert(Lexer lexer, HappyTokenKind expectedHappyTokenKind, string expectedText)
{
Token t = lexer.NextToken();
Assert.AreEqual(expectedHappyTokenKind, t.HappyTokenKind, "Token Text: {0}", t.Text);
Assert.AreEqual(expectedText, t.Text);
return t;
}
protected internal static void NextTokenAssert(Lexer lexer, HappyTokenKind expectedHappyTokenKind)
{
Token t = lexer.NextToken();
Assert.AreEqual(expectedHappyTokenKind, t.HappyTokenKind, "Token Text: {0}", t.Text);
}
internal Parser(Lexer lexer, HappyLanguageContext languageContext)
{
_lexer = lexer;
_errorCollector = new ErrorCollector(languageContext.ErrorSink);
}
internal Lexer TestVerbatimLexer(string text)
{
Lexer retval = new Lexer(LanguageContext.CreateSnippet("<|" + text + "|>", SourceCodeKind.AutoDetect), LanguageContext);
NextTokenAssert(retval, HappyTokenKind.BeginTemplate);
Assert.AreEqual(Lexer.LexerMode.LexingVerbatimText, retval.Mode);
return retval;
}
