public static Lexer GetLexer(Frame fromf, STable kl, LAD[] lads, string title)
{
LexerCache lc = kl.GetLexerCache();
Lexer ret;
if (lc.nfas.TryGetValue(lads, out ret))
return ret;
if (lc.parent != null && lc.parent.mo.name != "Cursor" && lc.parent.mo.name != "Any") {
ret = GetLexer(fromf, lc.parent.mo, lads, title);
foreach (string u in ret.pad.used_methods) {
if (lc.repl_methods.Contains(u))
goto anew;
}
if (LtmTrace)
Console.WriteLine("Reused {0} alternation lexer for {1} in {2}",
title, lc.parent.mo.name, kl.name);
return lc.nfas[lads] = ret;
}
anew:
if (LtmTrace) {
Console.WriteLine("Need new alternation lexer for {0} in {1}",
title, kl.name);
}
NFA pad = new NFA();
pad.cursor_class = kl;
LAD[] lads_p = new LAD[lads.Length];
pad.outer_stack.Add(fromf);
pad.info_stack.Add(fromf.info);
for (int i = 0; i < lads_p.Length; i++)
lads_p[i] = lads[i].Reify(pad);
ret = new Lexer(pad, title, lads_p);
lc.nfas[lads] = ret;
return ret;
}
public static Lexer GetDispatchLexer(STable kl, SubInfo disp)
{
LexerCache lc = kl.GetLexerCache();
Lexer ret;
if (lc.dispatch_nfas.TryGetValue(disp, out ret))
return ret;
if (lc.parent != null && lc.parent.mo.name != "Cursor" && lc.parent.mo.name != "Any") {
ret = GetDispatchLexer(lc.parent.mo, disp);
foreach (string u in ret.pad.used_methods) {
if (lc.repl_methods.Contains(u))
goto anew;
}
if (LtmTrace)
Console.WriteLine("Reused {0} dispatch lexer for {1} in {2}",
disp.name, lc.parent.mo.name, kl.name);
return lc.dispatch_nfas[disp] = ret;
}
anew:
if (LtmTrace) {
Console.WriteLine("Need new dispatch lexer for {0} in {1}",
disp.name, kl.name);
}
NFA pad = new NFA();
pad.cursor_class = kl;
P6any[] cands = (P6any[])disp.param[0];
LAD[] lads_p = new LAD[cands.Length];
for (int i = 0; i < lads_p.Length; i++) {
pad.outer_stack.Add(Kernel.GetOuter(cands[i]));
pad.info_stack.Add(Kernel.GetInfo(cands[i]));
lads_p[i] = pad.info_stack[0].ltm.Reify(pad);
pad.outer_stack.RemoveAt(pad.outer_stack.Count - 1);
pad.info_stack.RemoveAt(pad.info_stack.Count - 1);
}
ret = new Lexer(pad, disp.name, lads_p);
lc.dispatch_nfas[disp] = ret;
return ret;
}
