/**
* nfa - true to attempt as an nfa pattern for regexp. This handles most things except the complex repeates, ie {1,4}
*/
public void AddPattern(TokenPattern pattern, bool nfa = true)
{
switch (pattern.Type)
{
case TokenPattern.PatternType.STRING:
try
{
_stringDfaMatcher.AddPattern(pattern);
}
catch (Exception e)
{
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"error adding string token: " +
e.Message);
}
break;
case TokenPattern.PatternType.REGEXP:
if (nfa)
{
try
{
_nfaMatcher.AddPattern(pattern);
}
catch (Exception)
{
nfa = false;
}
}
if (!nfa)
{
try
{
_regExpMatcher.AddPattern(pattern);
}
catch (Exception e)
{
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"regular expression contains error(s): " +
e.Message);
}
}
break;
default:
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"pattern type " + pattern.Type +
" is undefined");
}
}
public void AddPattern(TokenPattern pattern)
{
switch (pattern.Type)
{
case TokenPattern.PatternType.STRING:
try
{
_stringDfaMatcher.AddPattern(pattern);
}
catch (Exception e)
{
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"error adding string token: " +
e.Message);
}
break;
case TokenPattern.PatternType.REGEXP:
try
{
//Because of a bug in nfaMatcher's treatment
//of repeath specifiers we resort to effectively always using the
//regExp matcher.
//Under some conditions, the process of throwing the
//exception from the nfaMatcher and catching it
//incurs an unacceptable slowdown in performance
_regExpMatcher.AddPattern(pattern);
}
catch (Exception)
{
try
{
_nfaMatcher.AddPattern(pattern);
}
catch (Exception e)
{
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"regular expression contains error(s): " +
e.Message);
}
}
break;
default:
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"pattern type " + pattern.Type +
" is undefined");
}
}
public void AddPattern(TokenPattern pattern)
{
switch (pattern.Type)
{
case TokenPattern.PatternType.STRING:
try
{
_stringDfaMatcher.AddPattern(pattern);
}
catch (Exception e)
{
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"error adding string token: " +
e.Message);
}
break;
case TokenPattern.PatternType.REGEXP:
try
{
//See comments in NetStandard version for why the regExp matcher is tried first
_regExpMatcher.AddPattern(pattern);
}
catch (Exception)
{
try
{
_nfaMatcher.AddPattern(pattern);
}
catch (Exception e)
{
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"regular expression contains error(s): " +
e.Message);
}
}
break;
default:
throw new ParserCreationException(
ParserCreationException.ErrorType.INVALID_TOKEN,
pattern.Name,
"pattern type " + pattern.Type +
" is undefined");
}
}
