- Add some comments

- Store maxFillIndexes only once where needed

diff --git a/code.cc b/code.cc
index fb38a7112f21a9026f63e41bbc83a4c3a3675617..53820f82969d77b5af55bafc41925a137b6d6152 100644 (file)
--- a/code.cc
+++ b/code.cc
@@ -1255,7 +1255,7 @@ void DFA::emit(std::ostream &o, uint ind)
                                                saves[s->rule->accept] = nSaves++;
                                        }
 
-                                       (void) new Save(s, saves[s->rule->accept]);
+                                       (void) new Save(s, saves[s->rule->accept]); // sets s->action
                                        continue;
                                }
                        }
@@ -1363,7 +1363,8 @@ void DFA::emit(std::ostream &o, uint ind)
                s->label = label++;
        }
 
-       uint maxFillIndexes = vFillIndexes;
+       // Save 'vFillIndexes' and compute information about code generation
+       // while writing to null device.
        uint orgVFillIndexes = vFillIndexes;
        null_stream  null_dev;
 
@@ -1373,9 +1374,10 @@ void DFA::emit(std::ostream &o, uint ind)
                s->emit(null_dev, ind, readCh);
                s->go.genGoto(null_dev, ind, s, s->next, readCh);
        }
-       maxFillIndexes = vFillIndexes;
+       uint maxFillIndexes = vFillIndexes;
        vFillIndexes = orgVFillIndexes;
 
+       // Generate prolog
        o << "\n" << outputFileInfo;
 
        if (hasFillLabels == false)
@@ -1409,6 +1411,7 @@ void DFA::emit(std::ostream &o, uint ind)
                o << "yyNext:\n";
        }
 
+       // Generate code
        for (s = head; s; s = s->next)
        {
                bool readCh = false;
@@ -1416,12 +1419,14 @@ void DFA::emit(std::ostream &o, uint ind)
                s->go.genGoto(o, ind, s, s->next, readCh);
        }
 
+       // Generate epilog
        o << indent(--ind) << "}\n";
        if (bitmap_brace)
        {
                o << indent(--ind) << "}\n";
        }
 
+       // Cleanup
        if (BitMap::first)
        {
                delete BitMap::first;