private Lexer(RegEx <char>[] regexCategories, string lexerName, IReadOnlyCollection <string> regexes)
{
_atomicCategoryLimit = (uint)regexCategories.Length;
_nextCategory = _atomicCategoryLimit + 1;
if (regexCategories.Length == 0)
{
var dfa = DfaUtils.MakeEmptyLanguageDfa <char>();
_engine = CompileLexer(dfa, lexerName, regexes);
if (_engine == null)
{
_dfa = dfa;
}
return;
}
var lastDfa = MakeRegexDfa(regexCategories[0], 1).Minimized <RegExDfa <char>, DFAState <char>, char>();
DfaUtils.DfaStatesConcpetCheck <char> .CheckDfaStates(lastDfa);
var handler = lexerName == null ? (DfaUtils.AmbiguityHandler)GetProductAccepting : GetCompiledAccepting;
for (uint i = 1; i < regexCategories.Length; ++i)
{
lastDfa =
DfaUtils
.MakeMinimizedProductDfa
<DfaUtils.MinimizedDfa <char>, DfaUtils.MinimizedDfaState <char>, RegExDfa <char>, DFAState <char>,
char>(lastDfa, MakeRegexDfa(regexCategories[i], i + 1), handler);
}
if (_canBeCompiled)
{
_engine = CompileLexer(lastDfa, lexerName, regexes);
}
if (_engine == null)
{
_dfa = lastDfa;
}
}
private static ProxyLexer CompileLexer(DfaUtils.MinimizedDfa <char> dfa, string lexerName,
IReadOnlyCollection <string> regexes)
{
return(LexerCompiler.CompileLexer <DfaUtils.MinimizedDfa <char>, DfaUtils.MinimizedDfaState <char> >(dfa,
lexerName, regexes));
}