path: root/web/yacco2/o2linker/prog.w

@q file: prog.w@>
@q%   Copyright Dave Bone 1998 - 2015@>
@q% /*@>
@q%    This Source Code Form is subject to the terms of the Mozilla Public@>
@q%    License, v. 2.0. If a copy of the MPL was not distributed with this@>
@q%    file, You can obtain one at http://mozilla.org/MPL/2.0/.@>
@q% */@>
@*2 External routines and globals.\fbreak
General routines to get things going:\fbreak
\ptindent{1) get control file and put into Linker's holding file}
\ptindent{2) parse the command line}
\ptindent{3) format errors}
These are defined by including |o2_externs.h|.

The globals are:\fbreak
\ptindent{1) |Error_queue| --- global container of errors passed across all parsings}
\ptindent{2) |GRAMMAR_DICTIONARY| --- thread container whose contents point into the symbol table}
\ptindent{3) |T_DICTIONARY| --- terminal container whose contents point into the symbol table}
\ptindent{4) |T_THREAD_ID_LIST| --- thread id list per terminal}
\ptindent{5) |NO_OF_THREADS| --- found number of threads}
\ptindent{6) |NO_WORDS_FOR_BIT_MAP| --- calculated number of words per thread bit map}
\ptindent{7) |THREAD_ID_FS| --- first set per thread id}

@<External rtns and ...@>=
extern int NO_OF_THREADS;@/
extern int NO_WORDS_FOR_BIT_MAP;

@ Do we have errors?.
Check that error queue for those errors. 
Note, |DUMP_ERROR_QUEUE| will also flush out
 any launched threads for the good housekeeping or is it
housetrained seal
award? Trying to do my best in the realm of short lived winddowns.
@<if error queue not empty then deal with posted errors@>=
if(Error_queue.empty()!=true){
	DUMP_ERROR_QUEUE(Error_queue);
    return 1;
}

@** Local routines.\fbreak
@*2 Parse linker control file.\fbreak
Handcrafted file that gathers all the grammar control files together for the processing.
Note the use of |tok_can<std::ifstream>| to read raw characters 
and produce tokens in just-in-time.
@<parse linker control file@>=
  cout << "Parse linker control file " << endl;
  using namespace NS_linker_pass3;
  tok_can<std::ifstream> cntl_file_tokens(cntl_file_name.c_str());
  TOKEN_GAGGLE P3_tokens;
  Clinker_pass3 linker_cntl_file_fsm;
  Parser linker_cntl_file(linker_cntl_file_fsm,&cntl_file_tokens,&P3_tokens,0,&Error_queue,0,0);
  linker_cntl_file.parse();
  @<if error queue not empty then deal with posted errors@>;

@*2 Parse T alphabet.\fbreak
Ahh the terminal vocabulary. The symbol's position within the list
is also its enumerate value starting from 0.
The |T_alphabet| grammar places the terminal symbols into the symbol table
as a  1:1 mapping, into
the |T_DICTIONARY| as a consolidated repository
and into the |T_THREAD_ID_LIST| 
which is the terminal to thread list relationship used
to quickly determine if the current token has the potential to run as a thread.
Each thread contains its first set list squirreled away in thread\_attributes's |list_of_Ts_|.

@<parse T alphabet@>=
cout << "Parse alphabet" << endl;
using namespace NS_link_cleanser;
tok_can<std::ifstream> T_file_tokens(linker_cntl_file_fsm.t_alphabet_filename_.c_str());
TOKEN_GAGGLE cleanser_tokens;
Clink_cleanser cleanser_fsm;
Parser cleanser(cleanser_fsm,&T_file_tokens,&cleanser_tokens,0,&Error_queue,0,0);
cleanser.parse();

using namespace NS_t_alphabet;
TOKEN_GAGGLE T_tokens;
Ct_alphabet T_fsm;
Parser T_pass3(T_fsm,&cleanser_tokens,&T_tokens,0,&Error_queue,0,0);
T_pass3.parse();
@<if error queue not empty then deal with posted errors@>;
  
@*2 Parse fsc files.\fbreak
Digest those fsc files. Burp. Better that than the other end.
Now for a chiro for the stretched stomach muscles.
The |fsc_file| grammar puts the digested grammar's fsc content into
the symbol table of thread attribute's object and its reference into
the |GRAMMAR_DICTIONARY|.
@<parse fsc files@>=
cout << "Parse fsc files" << endl;
TOKEN_GAGGLE cleanser_fsc_tokens;
TOKEN_GAGGLE fsc_file_output_tokens;
std::vector<std::string>::iterator ii = linker_cntl_file_fsm.grammars_fsc_files_.begin();
std::vector<std::string>::iterator iie = linker_cntl_file_fsm.grammars_fsc_files_.end();
for(;ii!=iie;++ii){
	tok_can<std::ifstream> T_fsc_file_tokens(ii->c_str());
	Clink_cleanser cleanser_fsc;
	Parser fsc_cleanser(cleanser_fsc,&T_fsc_file_tokens
	,&cleanser_fsc_tokens,0,&Error_queue,0,0);
	fsc_cleanser.parse();
	@<if error queue not empty then deal with posted errors@>;

	using namespace NS_fsc_file;
	Cfsc_file fsc_file_fsm;
	Parser fsc_file_pass(fsc_file_fsm,&cleanser_fsc_tokens
	,&fsc_file_output_tokens,0,&Error_queue,0,0);
	fsc_file_pass.parse();
    @<if error queue not empty then deal with posted errors@>;
    cleanser_fsc_tokens.clear();
	fsc_file_output_tokens.clear();
}
  @<if error queue not empty then deal with posted errors@>;

@*2 |load_linkkw_into_tbl|.\fbreak
 These are the keywords
 from all the languages to be parsed. 
 So why the loading up of keywords? Speed.
 |linker_id| does a symbol table lookup for \olinker.
 So where ever appropriate like the
 ``first set control'' files, normal boundary parsing can take place.
 There is your lexical grammar that discriminates characters into
 tokens like keywords, comments followed by
 a separate syntax grammar to process the language structure.
 See comments in Yacco2's external document regarding the reason for
  the kludge.
@<accrue linker code@>+=
void load_linkkw_into_tbl(yacco2::CAbs_lr1_sym* Kw){
   using namespace yacco2_stbl;
   T_sym_tbl_report_card report_card;
   KCHARP kwkey = Kw->id();
   if(*kwkey == '#')++kwkey;// kludge: bypass 1st char eg "$\#$fsm"
   kw_in_stbl* kw = new kw_in_stbl(Kw);
   add_sym_to_stbl(report_card,*kwkey,*kw,table_entry::defed,table_entry::keyword);
   kw->stbl_idx(report_card.pos_);
}

void load_linkkws_into_tbl()@/
{
   cout << "Load linker's keywords " << endl;
   load_linkkw_into_tbl(new T_transitive);
   load_linkkw_into_tbl(new T_grammar_name);
   load_linkkw_into_tbl(new T_name_space);
   load_linkkw_into_tbl(new T_thread_name);
   load_linkkw_into_tbl(new T_fsm_comments);
   load_linkkw_into_tbl(new T_monolithic);
   load_linkkw_into_tbl(new T_file_name);
   load_linkkw_into_tbl(new T_no_of_T);
   load_linkkw_into_tbl(new T_list_of_native_first_set_terminals);
   load_linkkw_into_tbl(new T_end_list_of_native_first_set_terminals);
   load_linkkw_into_tbl(new T_list_of_transitive_threads);
   load_linkkw_into_tbl(new T_end_list_of_transitive_threads);
   load_linkkw_into_tbl(new T_list_of_used_threads);
   load_linkkw_into_tbl(new T_end_list_of_used_threads);
   load_linkkw_into_tbl(new T_T_alphabet);
   load_linkkw_into_tbl(new T_end_T_alphabet);
   load_linkkw_into_tbl(new T_file_of_T_alphabet);
   load_linkkw_into_tbl(new T_emitfile);
   load_linkkw_into_tbl(new T_preamble);
   load_linkkw_into_tbl(new T_end_preamble);
}


@*2 Verify that all threads used are defined.\fbreak
 Simple check! Just
sequentially read the |GRAMMAR_DICTIONARY| whose elements are pointers to their 
symbol table registry where the entry is not ``defined'' but referenced by some
transitive call list.
The loop just pours the rogues into the error queue and uses the
token co-ordinates that created the entry as ``used'' for the error message.
This allows the error dump to pinpoint the source file and specific line that
referenced the rogue thread.
Correction is to add the missing grammar to the control file list or
correct the grammar that issued the thread call.
  @<post verify that there are no threads ``used'' and not ``defined''@>=
	std::vector<table_entry*>::iterator th_i = GRAMMAR_DICTIONARY.begin();@/
	std::vector<table_entry*>::iterator th_ie = GRAMMAR_DICTIONARY.end();@/
	for(;th_i != th_ie;++th_i){
		table_entry* tbl_entry = *th_i;
		
		if(tbl_entry->defined_ == true) continue;
		CAbs_lr1_sym* sym = new Err_bad_th_in_list;
		sym->set_who_created("linker.w",__LINE__);

        @=thread_attributes*th_goodies= ((th_in_stbl*)tbl_entry->symbol_)->thread_in_stbl();@>@/
		sym->set_rc(*th_goodies);
		Error_queue.push_back(*sym);		
	}
  @<if error queue not empty then deal with posted errors@>;

@** Sort thread dictionary.\fbreak
The grammars are divided into 2 types:\fbreak
\ptindent{1) monolithic --- stand alone grammars}
\ptindent{2) called threads}


To facilitate the emitted code, 
the following partial order is imposed on the fully qualified name (FQN) of the grammar
composed of the grammar's namespace 
and  name separated by ``::'': for example, |NS_eol::TH_eol|. This is the calling handle of
the thread when used with the ${\vert\vert\vert}$ statement.
The partial order is divided into 2 parts --- threads followed by standalone 
grammars:\fbreak
\ptindent{thread vs thread --- lexicographical order on ``thread name'' only}
\ptindent{thread vs mono --- thread less than mono grammar}
\ptindent{mono vs thread --- thread less than mono grammar}
\ptindent{mono vs mono --- lexicographical order on FQN}
The order  defines explicitly the enumerate value assigned to each thread starting from 0.
The standalone grammars (monolithic) are not part of the thread stable that gets emitted.
@<accrue linker code@>+=
bool sort_threads_criteria(const table_entry* P1,const table_entry* P2){
    @=th_in_stbl*th_tbl1= (th_in_stbl*)P1->symbol_;@> @/
    @=th_in_stbl*th_tbl2= (th_in_stbl*)P2->symbol_;@> @/
    thread_attributes* p1 = th_tbl1->thread_in_stbl();
    thread_attributes* p2 = th_tbl2->thread_in_stbl();
	int len_a = p1->thread_name_->c_string()->size();
	int len_b = p2->thread_name_->c_string()->size();
	string ucase_a;
	for(int x=0;x<len_a;++x){
	  ucase_a += toupper((*p1->thread_name_->c_string())[x]) ;
	}
	string ucase_b;
	for(int x=0;x<len_b;++x){
	  ucase_b += toupper((*p2->thread_name_->c_string())[x]) ;
	}
	if(len_a < len_b){
	  for(int x = len_a+1;x <=len_b;++x) ucase_a += ' ';
	}else{
	  for(int x = len_b+1;x <=len_a;++x) ucase_b += ' ';
	}
    int result;
    if(p1->monolithic_ == 'n'){// a:thread
      if(p2->monolithic_ == 'n'){// a:thread b:thread
			result = strcmp(ucase_a.c_str(),ucase_b.c_str());
			if(result < 0) return true;// a less b
			return false;// a gt b      
      }
      return true;// a:thread b:mono; a less b
    }
    if(p2->monolithic_ == 'n'){// a:mono b:thread
        return false;// a gt b
    }
    // a:mono b:mono changed to the thread name instead of fqn
	int len_fqna = p1->thread_name_->c_string()->size();
	int len_fqnb = p2->thread_name_->c_string()->size();
	string ucase_fqna;
	for(int x=0;x<len_fqna;++x){
	  ucase_fqna += toupper((*p1->thread_name_->c_string())[x]); 
	}
	string ucase_fqnb;
	for(int x=0;x<len_fqnb;++x){
	  ucase_fqnb += toupper((*p2->thread_name_->c_string())[x]);
	}
	if(len_fqna < len_fqnb){
	  for(int x = len_fqna+1;x <=len_fqnb;++x) ucase_fqna += ' ';
	}else{
	  for(int x = len_fqnb+1;x <=len_fqna;++x) ucase_fqnb += ' ';
	}
	result =  strcmp(ucase_fqna.c_str(),ucase_fqnb.c_str());
	if(result < 0  ) return true;// a less b
	return false;// a gt b          
}

@*2 Sort uses template algorithm. 
@<sort thread dictionary@>=
  cout << "Sort thread dictionary" << endl;
  stable_sort(GRAMMAR_DICTIONARY.begin(),GRAMMAR_DICTIONARY.end(),sort_threads_criteria);
  
@*2 Dump sorted dictionary.\fbreak
Not another reality show? Yupp.
@<dump sorted dictionary@>=
yacco2::lrclog << "Sorted thread dictionary" << GRAMMAR_DICTIONARY.size()<< std::endl; 
	std::vector<table_entry*>::iterator dth_i = GRAMMAR_DICTIONARY.begin();@/
	std::vector<table_entry*>::iterator dth_ie = GRAMMAR_DICTIONARY.end();@/
    int pos(-1);
	for(;dth_i != dth_ie;++dth_i){
	    ++pos;
		table_entry* tbl_entry = *dth_i;
        @=thread_attributes*th_goodies= ((th_in_stbl*)tbl_entry->symbol_)->thread_in_stbl();@>@/
yacco2::lrclog << "tbl entry*: " 
<< tbl_entry << " th_goodies*: " << th_goodies 
<< " " << pos << ":" << th_goodies->th_enum_ 
<< " mono: " << th_goodies->monolithic_ 
               << " thread name: " << th_goodies->thread_name_->c_string()->c_str()
               << " FQN: " << th_goodies->fully_qualified_th_name_.c_str() 
			   << " K: " << th_goodies->fsm_comments_->c_string()->c_str()
               << std::endl;
	}

@*2 Count and re-align threads enumerate values to sorted position.\fbreak
The |NO_OF_THREADS| is calculated at the same time. It is used to indicate thread presence
and the numbers of threads to emit. 
@<count and re-align threads enumerate values to sorted position@>=
	std::vector<table_entry*>::iterator ri = GRAMMAR_DICTIONARY.begin();@/
	std::vector<table_entry*>::iterator rie = GRAMMAR_DICTIONARY.end();@/
	for(int p = -1;ri != rie;++ri){
        ++p;
		table_entry* tbl_entry = *ri;
        @=thread_attributes*th_goodies= ((th_in_stbl*)tbl_entry->symbol_)->thread_in_stbl();@>@/
        th_goodies->th_enum_ = p;
        if(th_goodies->monolithic_ == 'n') ++NO_OF_THREADS;
	}

@ Check whether Linker has enough space to generate the thread bit maps.\fbreak
See |Passover on code| for my comments.
@<check whether Linker has enough space to gen thread bit maps: no throw up@>=
int max_thds_supported = SPECULATIVE_NO_BIT_WORDS * BITS_PER_WORD;
if(NO_OF_THREADS > max_thds_supported ){
	char a[SMALL_BUFFER_4K];
@.Error: not enough space for thread bit map manufacture!@>;
      KCHARP msg = 
        "Error: not enough space for thread bit map manufacture!"
        " # threads: %i, Linker's maximum no of threads supported: %i. \n"
        " Please expand SPECULATIVE_NO_BIT_WORDS";
	    sprintf(a,msg,NO_OF_THREADS,max_thds_supported);
	Yacco2_faulty_precondition(msg,__FILE__,__LINE__);
	exit(1);
}

@** Thread graphs: first set generation.
@*2 |Visit_graph|.
@<External rtns and ...@>+=
extern char Visit_graph[RESERVE_FIXED_NO_THREADS];
@*3 Probagate ${\vert+\vert}$.\fbreak
Not much to it. The ``all shift'' operator indicates all terminals.
It is a wild token facility that eases the pain in using grammars.
So, all terminals except some meta operators must be placed into
the first set and the thread id against each terminal.

To lower the \olinker document, the \ALLshift
meta terminal representing all terminals substitutes ``eolr''
in the thread's first set.
It certainly makes for a cleaner document without the slug fest.
@<probagate ${\vert+\vert}$@>=
        INT_SET_ITER_type t_listi = Root_thread.fs_.find(LR1_EOLR);// substitute eolr
	if(t_listi == Root_thread.fs_.end()){
	  Root_thread.fs_.insert(LR1_EOLR);
	}

  int no_of_T = T_DICTIONARY.size();// rel 1 instead of 0
  for(int x=0;x<no_of_T;++x){
	  switch(x){
		  case LR1_QUESTIONABLE_SHIFT_OPERATOR:break;
		  case LR1_EOG:break;
		  case LR1_EOLR:continue;
		  case LR1_PARALLEL_OPERATOR:continue;
		  case LR1_REDUCE_OPERATOR:continue;
		  case LR1_INVISIBLE_SHIFT_OPERATOR:continue;
		  case LR1_ALL_SHIFT_OPERATOR:continue;
		  case LR1_FSET_TRANSIENCE_OPERATOR:continue;
		  default:break;
	  }
     if(Visited_th.monolithic_ == 'n'){
		INT_SET_type& th_list = T_THREAD_ID_LIST[x];
		if(th_list.find(Visited_th.th_enum_) ==th_list.end()){
			  th_list.insert(Visited_th.th_enum_);
		}
		if(th_list.find(Root_thread_id) ==th_list.end()){
			  th_list.insert(Root_thread_id);
		}
	 }
  }
  
@*3 Deal with threads having T in first set.\fbreak
Please note that threads only are dealt with and not their standalone brethren.
The root grammar is still traversed so that 
its called threads can be added to the list.

Though the monolithic grammar is not launched by its first set, 
I included its first set calculations to verify my work.
@<deal with threads having T in first set@>=
   INT_SET_ITER_type t_listi = Root_thread.fs_.find(t_enum);
   if(t_listi == Root_thread.fs_.end()){
     Root_thread.fs_.insert(t_enum);
   }
if(Visited_th.monolithic_ == 'n'){
   INT_SET_type&  th_list = T_THREAD_ID_LIST[t_enum];@/
   if(th_list.find(Visited_th.th_enum_) ==th_list.end()){
	 th_list.insert(Visited_th.th_enum_);
   }
   if(th_list.find(Root_thread_id) ==th_list.end()){
	 th_list.insert(Root_thread_id);
   }
}

@*3 Associate native terminals with called thread.\fbreak
For the moment until i can refine the thread's first set algorithm
in \o2 that generates the Tes for ``list-of-native-first-set-terminals'',
 i force ``attempting to run'' the threads
having the \TRAshift in their first set across all Tes.
There will be thread stutters in firing them up
and then shuting them down when their true
first set is outside of the current token.
Remember these threads are fired up when they are in the 
being run grammar's current lr parse state.
So the speed bump shouldn't be too big. 

@<associate native terminals with called thread@>=
  std::vector<int>::iterator fi = Visited_th.list_of_Ts_.begin();@/
  std::vector<int>::iterator fie = Visited_th.list_of_Ts_.end();@/
  for(;fi!=fie;++fi){
   int t_enum = *fi;
   if(t_enum == LR1_ALL_SHIFT_OPERATOR){
		@<probagate ${\vert+\vert}$@>;
   }   
   @<deal with threads having T in first set@>;
  }

@*3 Process called thread's list.\fbreak
Walk the list and recursively call that graph.
@<process called thread's list@>=
std::vector<thread_attributes*>::iterator li = Visited_th.list_of_transitive_threads_.begin();
std::vector<thread_attributes*>::iterator lie = Visited_th.list_of_transitive_threads_.end();
for(;li!=lie;++li){
  thread_attributes* th_att = *li;
lrclog << "------->process called thread's list thd: " 
<< th_att->thread_name_->c_string()->c_str() 
<< " for root thd id: " << Root_thread_id
<< endl;
  crt_fset_of_thread(*th_att,Root_thread_id,Root_thread);
} 
   
@*2 |crt_fset_of_thread|.\fbreak
Recursive procedure that chews gum, pats its stomach, and belches fire.\fbreak
It traverses the called threads recursively to continue
the association of the inherited terminals into their thread bit maps.
Uses the |Visit_graph| to prevent self looping: whichever
way u call it left or right recursion depending on your context ---
cheers or bottoms-up.

The  |Root_thread_id| associates the starting thread id
to the traversed called threads' first sets' terminals.
Each  thread is processed individually to associate itself 
with their called brethern's first sets.

@<accrue linker code@>+=
void crt_fset_of_thread
        (thread_attributes& Visited_th
        ,int Root_thread_id,thread_attributes& Root_thread){
  if(Visit_graph[Visited_th.th_enum_] == 'y') return;
  Visit_graph[Visited_th.th_enum_] = 'y';
  @<associate native terminals with called thread@>;
  @<process called thread's list@>;
}

@*2 Allocation space for |Visit_graph|.\fbreak
Before, reserve allocated its space, now MS throws an error
as |push_back| not done.
@<allocation space for |Visit_graph|@>=
  for(int vi = 0;vi<NO_OF_THREADS;++vi){
     Visit_graph[vi] = 'n'; 
  }    
  
@*2 Initialize |Visit_graph| to ``not visited''.\fbreak
Each new thread having its final fist set's gened presets the graph.
@<initialize |Visit_graph| to not visited@>=
for(int vi = 0;vi<NO_OF_THREADS;++vi){
 Visit_graph[vi] = 'n'; 
}    

@*2 Generate those first sets.\fbreak 
Walk the what? u threads fulfull your first set destinies.
Not very complex. 
A visit graph 
is built having its nodes equal in number to the threads
in the |GRAMMAR_DICTIONARY|. 
Each node is initialized to ``not visited''. 
From here, it's just process each thread and visit its called threads to
inherit their native terminals: Of course this is a transitive process.
Sorry for the let down but there ain't much to it.

A secondary graph of called threads per grammar is built so that 
 an overall linker document can be emitted with:\fbreak
\ptindent{1) index of threads sorted by their name with its fsm's comments}
\ptindent{2) followed by the monolithic grammars}
\ptindent{3)) each grammar will have its called threads}
@<generate threads final first sets@>=
@<allocation space for |Visit_graph|@>;

  std::vector<table_entry*>::iterator thi = GRAMMAR_DICTIONARY.begin();@/
  std::vector<table_entry*>::iterator thie = GRAMMAR_DICTIONARY.end();@/
  for(;thi != thie;++thi){// individually process each thread
    @=th_in_stbl*th_tbl= (th_in_stbl*)(*thi)->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
    if(th_att->monolithic_ == 'n'){
yacco2::lrclog << "thread being walked: " 
        <<th_att->thread_name_->c_string()->c_str() << " id: "
<< th_att->th_enum_ << std::endl;
		@<initialize |Visit_graph| to not visited@>;
            crt_fset_of_thread(*th_att,th_att->th_enum_,*th_att);  
	}
  }
  thi = GRAMMAR_DICTIONARY.begin();@/
  thie = GRAMMAR_DICTIONARY.end();@/
  for(;thi != thie;++thi){// individually process each thread
    @=th_in_stbl*th_tbl= (th_in_stbl*)(*thi)->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
    @<initialize |Visit_graph| to not visited@>;
    crt_called_thread_graph(*th_att);
  }

@** Generate document for each grammar's called threads.\fbreak 
@*3 |crt_called_thread_list| and |walk_called_thread_list|.\fbreak
Generate the call graph per thread for reporting purposes.
@<accrue linker code@>+=
void walk_called_thread_list(std::vector<thread_attributes*>& Thd_list,AST* Mother_thd_t){
  if(Thd_list.begin() == Thd_list.end()) return;
  std::vector<thread_attributes*>::iterator li = Thd_list.begin();
  std::vector<thread_attributes*>::iterator lie = Thd_list.end();
  for(;li!=lie;++li){
    thread_attributes* th_att = *li;
    if(Visit_graph[th_att->th_enum_] == 'y') continue;
    Visit_graph[th_att->th_enum_] = 'y';
    AST* called_t = new AST(*th_att);
    AST::add_child_at_end(*Mother_thd_t,*called_t);
    walk_called_thread_list(th_att->list_of_transitive_threads_,called_t);
  } 
}

@*3 |crt_called_thread_graph|.
@<accrue linker code@>+=
void crt_called_thread_graph(thread_attributes& Visited_th){
  if(Visit_graph[Visited_th.th_enum_] == 'y') return;
  Visit_graph[Visited_th.th_enum_] = 'y';
  AST* mother_thd_t = new AST(Visited_th);
  Visited_th.called_thread_graph_ = mother_thd_t;
  walk_called_thread_list(Visited_th.list_of_transitive_threads_,mother_thd_t);
}
@*3 |gen_each_thread_s_referenced_threads|.
@<accrue linker code@>+=
void gen_each_grammar_s_referenced_threads(){
  std::vector<table_entry*>::iterator thi = GRAMMAR_DICTIONARY.begin();@/
  std::vector<table_entry*>::iterator thie = GRAMMAR_DICTIONARY.end();@/
  for(;thi != thie;++thi){// individually process each thread
    @=th_in_stbl*th_tbl= (th_in_stbl*)(*thi)->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
    @<initialize |Visit_graph| to not visited@>;
    crt_called_thread_graph(*th_att);
  }
}
@*1 Generate Linker's document.\fbreak 
A secondary graph of called threads per grammar is built so that 
 an overall linker document can be emitted with:\fbreak
\ptindent{1) index of threads sorted by their name with its fsm's comments}
\ptindent{2) followed by the monolithic grammars}
\ptindent{3)) each grammar will have its ``called threads'' graph}

@*4 Make grammar's contents cweaveable and output.
@<make grammar's contents cweaveable and output@>=
      XLATE_SYMBOLS_FOR_cweave(th_att->thread_name_->c_string()->c_str(),xlate_gfile);
       XLATE_SYMBOLS_FOR_cweave(th_att->fsm_comments_->c_string()->c_str(),rebuild_comment);
       strcat(fandk,xlate_gfile);
       strcat(fandk," --- ");
       strcat(fandk,rebuild_comment);
       int fandk_len = strlen(fandk);
       if(fandk_len < CWEAVE_TITLE_LIMIT){
        if(fandk[fandk_len-1] != '.'){
               strcat(fandk,".");
        }
       }else{
         if(fandk_len == CWEAVE_TITLE_LIMIT){
           if(fandk[CWEAVE_TITLE_LIMIT-1] != '.'){
               strcat(fandk,".");
           }
         }else{
          fandk[CWEAVE_TITLE_LIMIT] = (char)0;
          strcat(fandk,"$\\ldots$ .");
         }
       }
      int x = sprintf(big_buf_
 		,w_grammar
		,fandk
 		);	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;
   x = sprintf(big_buf_
 		,w_comments
		,rebuild_comment
 		);	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;
   x = sprintf(big_buf_
 		,w_called_threads," "
 		);	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;
 
@*4 Output grammar's called threads list.
@<output grammar's called threads list@>=
     prt_called_thread_list_ast_functor prt_functr(&PRINT_CALLED_THREAD_LIST);
     prt_functr.o_file(&ow_linker_file_);
     ast_prefix pre(*th_att->called_thread_graph_,&prt_functr);
     while (pre.base_stk_.cur_stk_rec() != 0){
      pre.exec();
     }

@*4 Output grammar's used threads.
@<output grammar's used threads@>=
std::map<std::string, std::vector<std::string> >::iterator ti =
      USED_THREADS_LIST.find(th_att->thread_name_->c_string()->c_str());
      ow_linker_file_ << "{\\parindent=6pc" << endl;
      ow_linker_file_ << "\\item{Used threads:}" << std::endl;
      KCHARP used_threads =
        "%s\n"
        "@@.%s@@>";// xref entry
      std::vector<std::string>& tt = ti->second;
      std::vector<std::string>::iterator tti = tt.begin();
      std::vector<std::string> ::iterator ttie= tt.end();
      char xlate_thnm[Max_cweb_item_size];
      for(;tti!=ttie;++tti){
        XLATE_SYMBOLS_FOR_cweave(tti->c_str(),xlate_thnm);
        int x = sprintf(big_buf_,used_threads,xlate_thnm,xlate_thnm);
        ow_linker_file_.write(big_buf_,x);
        ow_linker_file_ << std::endl;
      }
      if(ti->second.empty() == YES) ow_linker_file_ << " none" << endl;
      ow_linker_file_ << "}" << endl;

@*4 Output grammar's first set.\fbreak
Go thru the set and map the T enum into its literal value.
@<output grammar's first set@>=
      ow_linker_file_ << "{\\parindent=6pc" << endl;
      ow_linker_file_ << "\\item{First set:}" << std::endl;
      KCHARP fs =
        "%s\n"
        "@@.%s@@>";// xref entry
  INT_SET_ITER_type fsi = th_att->fs_.begin();
  INT_SET_ITER_type fsie = th_att->fs_.end();
  char xlate_tnm[Max_cweb_item_size];
  for(;fsi!=fsie;++fsi){
    int tenum = *fsi;
    table_entry* t_entry = T_DICTIONARY[tenum];
    tth_in_stbl* t_in_stbl = (tth_in_stbl*)t_entry->symbol_;
    T_attributes * t_att = t_in_stbl->t_in_stbl();
        XLATE_SYMBOLS_FOR_cweave(t_att->fully_qualified_T_name_.c_str(),xlate_tnm);
        int x = sprintf(big_buf_,fs,xlate_tnm,xlate_tnm);
        ow_linker_file_.write(big_buf_,x);
        ow_linker_file_ << std::endl;
   }

@*3 Output preamble of document.
@<output preamble of document@>=
    KCHARP w_doc_index =	
        "\\input \"supp-pdf\"\n"
        "\\input \"/usr/local/yacco2/diagrams/o2mac.tex\"\n"
        "\\IDXlinkerdoctitle{%s}{%s}{%s}";
        char xlate_file[Max_cweb_item_size];xlate_file[0] = (char)0;
        char xlate_fscfile[Max_cweb_item_size];xlate_fscfile[0] = (char)0;
       XLATE_SYMBOLS_FOR_cweave(w_linker_filename_.c_str(),xlate_file);
       XLATE_SYMBOLS_FOR_cweave(cntl_file_name.c_str(),xlate_fscfile);
       int x = sprintf(big_buf_
 		,w_doc_index
                ,xlate_file
                ,xlate_file
                ,xlate_fscfile
 		);	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;
     KCHARP w_doc_comments =	
        "@@** O2linker Index of Grammars.\\fbreak\n"
        "The grammars are sorted lexicographically into 2 parts:\n"
        "threads followed by the stand alone grammars.\n"
        "Each grammar's called threads graph is determined from their \n"
        " ``list-of-transitive-threads''\n"
        "derived from this construct.%s";
       x = sprintf(big_buf_,w_doc_comments," ");	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;

@*3 Loop thru grammars to gen their local linker doc info.
@<loop thru grammars to gen their local linker doc info@>=
    KCHARP w_grammar =	
        "@@*2 %s";
    KCHARP w_comments =	
        "\\Linkeridxentryk{%s}";
    KCHARP w_called_threads =	
        "\\Linkercalledthreadstitle%s";
  char xlate_gfile[Max_cweb_item_size];
  char rebuild_comment[Max_cweb_item_size];
  char fandk[Max_cweb_item_size];
  char xlate_thnm[Max_cweb_item_size];
  char xlate_tnm[Max_cweb_item_size];

 std::vector<table_entry*>::iterator ithi = GRAMMAR_DICTIONARY.begin();@/
  std::vector<table_entry*>::iterator ithie = GRAMMAR_DICTIONARY.end();@/
  for(;ithi != ithie;++ithi){// individually process each thread
    xlate_gfile[0] = (char)0;
    rebuild_comment[0] = (char)0;
    fandk[0] = (char)0;
    xlate_thnm[0] =  (char)0;
    xlate_tnm[0] =  (char)0;

	table_entry* tbl_entry = *ithi;
        @=thread_attributes*th_att= ((th_in_stbl*)tbl_entry->symbol_)->thread_in_stbl();@>@/
       @<make grammar's contents cweaveable and output@>;
       @<output grammar's called threads list@>;
       @<output grammar's first set@>;
       @<output grammar's used threads@>;
 }

@*3 Output First set of linker.
@<output First set of linker@>=
    KCHARP w_fsc_file_listing =	
        "@@** First set control file (fsc) listing.\\fbreak\n"
        "File : ``%s''\\fbreak\n"
        "\\let\\setuplistinghook = \\relax\n"
        "\\listing{\"%s\"}\n";
        char xlated_filename[Max_cweb_item_size];

XLATE_SYMBOLS_FOR_cweave(cntl_file_name.c_str(),xlated_filename);
   x = sprintf(big_buf_
 		,w_fsc_file_listing
		,xlated_filename
		,cntl_file_name.c_str()
 		);	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;

@*3 Output Index of linker.
@<output Index of linker@>=
    KCHARP w_index =	
        "@@** Index.%s";
   x = sprintf(big_buf_,w_index," ");	
      ow_linker_file_.write(big_buf_,x);
      ow_linker_file_ << std::endl;


@*2 Output driver of the linker document.
@<generate linker document@>=
  gen_each_grammar_s_referenced_threads();
  char big_buf_[BIG_BUFFER_32K];		
  std::string w_linker_filename_("o2linker_doc.w");
  std::ofstream ow_linker_file_;
  ow_linker_file_.open(w_linker_filename_.c_str(),ios_base::out|ios::trunc);
  @<output preamble of document@>;
  @<loop thru grammars to gen their local linker doc info@>;
  @<output First set of linker@>;
  @<output Index of linker@>;
  ow_linker_file_.close();

@** Emit code.\fbreak
There is not too much to emit.\fbreak
\ptindent{1) cpp preamble code  --- time of day, and the grammar writer's preamble}
\ptindent{2) threads include files and their namespace statement}
\ptindent{3) global bit maps}
\ptindent{4) global thread stable}
\ptindent{5) global terminals and their thread bit maps}

As an afterthought, the situation of having no threads to emit has been added.
@<emit code@>=
  cout << "Emit file name: " << linker_cntl_file_fsm.emitfile_filename_.c_str() << endl;
  ofstream ofile(linker_cntl_file_fsm.emitfile_filename_.c_str(),ios::out);
  if (!ofile){
    cout << "Error - can't open emit file: " 
	<< linker_cntl_file_fsm.emitfile_filename_.c_str() << endl;
    return 1;
  }
  emit_cpp_preamble(ofile
               ,linker_cntl_file_fsm.emitfile_filename_.c_str()
               ,linker_cntl_file_fsm.preamble_srce_->syntax_code()->c_str());
  emit_global_thread_include_files(ofile);
  emit_global_bit_maps(ofile);
  if(NO_OF_THREADS == 0){
    emit_no_threads(ofile);
  }else{
	emit_global_thread_stable(ofile);
	emit_T_fs_of_potential_threads(ofile);
  }
  ofile.close();

@*2 Emit no threads.\fbreak
A situation where the grammar writer has only standalone grammars; there 
are no parallel statements used within the grammars: 
${\vert\vert\vert}$ "returned token" called  "thread".
@<accrue linker code@>+=
void emit_no_threads(ofstream& ofile){
  ofile << "// There are NO THREADS emitted" << endl;
  ofile << "void* yacco2::THDS_STABLE__ = 0;" << endl;
  ofile << "void* yacco2::T_ARRAY_HAVING_THD_IDS__ = 0;" << endl;
}
  
@*2 Emit cpp preamble.
@<accrue linker code@>+=
void emit_cpp_preamble(ofstream& ofile,const char* OFile,const char* Preamble){
  ofile << "//"  << endl;
  ofile << "// File: " << OFile << endl;
  ofile << "// Generated by linker.exe"  << endl;
  ofile << "// Date and Time: " << DATE_AND_TIME() << endl;
  ofile << "//"  << endl;
  ofile << endl;
  ofile << "// Preamble code"  << endl;
  ofile << Preamble << endl;
}

@*2 Emit thread include files.\fbreak
Unfortunately, a lot of verbage to resolve the thread's
procedure. OhHum.

Note, standalone grammars are not emitted. Why process them anyway?
They provide thread calls that are added to the terminal's thread bit map.
 @<accrue linker code@>+=
void emit_global_thread_include_files(ofstream& ofile){
  ofile << "// thread include and namespace" << std::endl;
  char a[SMALL_BUFFER_4K];
  KCHARP thread_include_ns = "#include \"%s.h\"";

  std::vector<table_entry*>::iterator thi = GRAMMAR_DICTIONARY.begin();@/
  std::vector<table_entry*>::iterator thie = GRAMMAR_DICTIONARY.end();@/
  for(;thi != thie;++thi){
    @=th_in_stbl*th_tbl= (th_in_stbl*)(*thi)->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
    if(th_att->monolithic_ == 'y') break;
    int x = sprintf
        (a
        ,thread_include_ns
        ,th_att->grammar_file_name_->c_string()->c_str()
        );
       ofile.write(a,x);
      ofile << std::endl;
  }
}

@*2 Emit global bit maps.
@<accrue linker code@>+=
void emit_global_bit_maps(ofstream& ofile){
  ofile << "// BIT MAPS" << std::endl;
  ofile << "#define TOTAL_NO_BIT_WORDS 2*1024*50" << std::endl;
  ofile << "int yacco2::TOTAL_NO_BIT_WORDS__(TOTAL_NO_BIT_WORDS);" << std::endl;
  ofile << "yacco2::ULINT  bit_maps[TOTAL_NO_BIT_WORDS];" << std::endl;
  ofile << "void* yacco2::BIT_MAPS_FOR_SALE__ = (void*)&bit_maps;" << std::endl;
  ofile << "int yacco2::BIT_MAP_IDX__(0);" << std::endl;
}

@*2 Emit  global thread stable |THDS_STABLE__|.\fbreak
Read the |GRAMMAR_DICTIONARY| and emit a sorted |Thread_entry| list where
each thread (excluded are the standalone grammars) 
has a global naming convention of Ixxx where the xxx is the thread name.
The |Thread_entry| provides its literate name,
 the thread function to be spawned, and its enumerate value
used as an index into the array of threads.

|THDS_STABLE__| is a global referenced by Yacco2's runtime library.
It is a structure indicating the number of threads within its array and 
the array of addresses to each just-gened thread's |Thread_entry|. HoHum --- is
this better than fe-fi-foe-fum I smell the blood of an ...?  
@<accrue linker code@>+=
void emit_global_thread_stable(ofstream& ofile){
  ofile << "// THREAD STABLE" << std::endl;
  char a[BIG_BUFFER_32K];
  KCHARP thread_entry = "yacco2::Thread_entry I%s = {%s,%s,%i,%s::PROC_%s};";
  string quoted_name;
  @<gen thread list@>;
  @<gen global thread array@>;
}

@*2 The threading stew.
@<gen thread list@>=
  std::vector<table_entry*>::iterator thi = GRAMMAR_DICTIONARY.begin();@/
  std::vector<table_entry*>::iterator thie = GRAMMAR_DICTIONARY.end();@/
  for(;thi != thie;++thi){
    @=th_in_stbl*th_tbl= (th_in_stbl*)(*thi)->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
    if(th_att->monolithic_ == 'y') break;
    quoted_name.clear();
    const char* th_name = th_att->thread_name_->c_string()->c_str();
    quoted_name += '"';
    quoted_name += th_name;
    quoted_name += '"';

	int x = sprintf(a,thread_entry,th_name,quoted_name.c_str()
		,th_att->fully_qualified_th_name_.c_str(),th_att->th_enum_
                ,th_att->name_space_name_->c_string()->c_str()
                ,th_att->thread_name_->c_string()->c_str());
       ofile.write(a,x);
      ofile << std::endl;
  }
  
@*2 The table h\^ote.\fbreak
The thoroughbreds waiting for the ``and they'rrrre off''. 
@<gen global thread array@>=
  div_t c = div(NO_OF_THREADS,BITS_PER_WORD);
  if(c.rem != 0) ++c.quot;
  NO_WORDS_FOR_BIT_MAP = c.quot;

  KCHARP thread_array = 
     "struct thd_array_type {\n"
	 "  yacco2::USINT no_entries__;\n"
     "  yacco2::Thread_entry* first_entry__[%i];"
     "};\n"
	 "thd_array_type thd_array = {\n"
	 " %i\n"
	 " ,\n"
	 "  {\n";
	  int x = sprintf(a,thread_array,NO_OF_THREADS,NO_OF_THREADS);

       ofile.write(a,x);
      ofile << std::endl;
  bool first_entry(true);
  thi = GRAMMAR_DICTIONARY.begin();
  thie = GRAMMAR_DICTIONARY.end();
  KCHARP thread_entry_name = "&I%s";
  for(;thi!=thie;++thi){
    @=th_in_stbl*th_tbl= (th_in_stbl*)(*thi)->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
    if(th_att->monolithic_ == 'y') break;
	  if(first_entry == true){
        first_entry = false;
        ofile << "    ";
	  }else{
        ofile << "   ,";
	  }
	  int x = sprintf(a,thread_entry_name,th_att->thread_name_->c_string()->c_str());
       ofile.write(a,x);
      ofile << std::endl;
  }
  ofile << "  }\n};" << endl;
  @<announce the stable to the world@>;
  
@*2 Announce the stable to the world.
@<announce the stable to the world@>=
  ofile << "void* yacco2::THDS_STABLE__ = (void*)&thd_array;" << endl;

@*2 Emit global Terminals' thread bit maps.\fbreak
This is the inverse to first sets: these are the threads that can 
run from the specific terminal.

This global optimization determines whether the finite state table
has the potential to run a thread. How so?
Firstly, the local grammar determines 
whether threading is taking place in its current state configuration.
If so, the current token is 
checked to see whether there are threads to possibly run using
the global thread bit map specific to itself.
With these potental threads the local state
configuration is measured for activity. 
Then and only then will the
just-in-time dynamics of building the grammar's local thread map occur and the 
found threads launched.

This optimization stops stuttering: how so?
Only threads having the current token in their first set get launched.
The jiggles now are only real potential prefixes to parse by each launched thread.
Remember, common prefixes get resolved by arbitration within the
launching grammar specific to the current finite state configuration.

Why the output to another file? The flatulence of Microsoft's compiler: an 
INTERNAL COMPILER ERROR ``C1001'' message.
Well I found the typo that causes this draconian behavior: ``endl::endl''
instead of ``std::endl''. This congers up speculative thoughts on how
Microsoft's compiler is written. Enough of my racket: Back to appending
to the same file.  

@<accrue linker code@>+=
void  emit_T_fs_of_potential_threads(ofstream& ofile){
  ofile << "// Terminal thread sets" << std::endl;
  int no_of_T = T_DICTIONARY.size();
  char a[SMALL_BUFFER_4K];
  KCHARP T_list_to_thd_list_type = 
	      "struct T_%i_type{\n"
	      " yacco2::ULINT first_entry__[%i];\n"
	      "};\n";@/
  KCHARP T_list_to_thd_list_var = "T_%i_type T_%i = {// for T: %s";@/
  KCHARP thd_id_in_list = "//%i: %s";@/
			
  INT_SET_LIST_ITER_type i = T_THREAD_ID_LIST.begin();@>@/
  INT_SET_LIST_ITER_type ie = T_THREAD_ID_LIST.end();@>@/
  int terminal_id(-1);
  for(;i!=ie;++i){
    ++terminal_id;@/  
        INT_SET_type& th_list = *i;
    if(th_list.empty() == true) continue;
 	int x = sprintf(a,T_list_to_thd_list_type,terminal_id,NO_WORDS_FOR_BIT_MAP);
       ofile.write(a,x);
      ofile << std::endl;
    @<create terminal's thread bit map@>;     
  }
  @<emit array of Terminals' thread bit maps@>;
}


@*2 Create terminal's thread bit map.\fbreak
As the number of threads are unknown, 
I use |SPECULATIVE_NO_BIT_WORDS| to reserve the space to manufacture
the thread maps.
See my comments in |Passover on code|.
@<create terminal's thread bit map@>=     
  int no_thds_ids = th_list.size();
  table_entry* t_entry = T_DICTIONARY[terminal_id];
  tth_in_stbl* t_in_stbl= (tth_in_stbl*)t_entry->symbol_;
  T_attributes* t_att= t_in_stbl->t_in_stbl();
  x = sprintf(a
           ,T_list_to_thd_list_var
           ,terminal_id
           ,terminal_id
           ,t_att->fully_qualified_T_name_.c_str()
           );
        ofile.write(a,x);
      ofile << std::endl;@/
  ULINT word_map[SPECULATIVE_NO_BIT_WORDS]= {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  
  INT_SET_ITER_type j = th_list.begin();
  INT_SET_ITER_type je = th_list.end();

  @<calculate terminal's thread bit map@>;
  @<emit terminal's thread bit map@>;
	
@*2 Calculate terminal's thread bit map.
And print out their contents as comments.
@<calculate terminal's thread bit map@>=
  for(;j!=je;++j){
    int th_id = *j;
    table_entry* tbl_entry = GRAMMAR_DICTIONARY[th_id];  
    @=th_in_stbl*th_tbl= (th_in_stbl*)tbl_entry->symbol_;@> @/
    thread_attributes* th_att = th_tbl->thread_in_stbl();
	div_t bb = div(th_id,BITS_PER_WORD);
	ULINT bit_pos_value = 1 << bb.rem;
	word_map[bb.quot] |= bit_pos_value;
 	int x = sprintf(a,thd_id_in_list,th_id,th_att->thread_name_->c_string()->c_str());
       ofile.write(a,x);
      ofile << std::endl;
  }
  
@*2 Emit terminal's thread bit map.
@<emit terminal's thread bit map@>=
	for(int dd=1;dd<=NO_WORDS_FOR_BIT_MAP;++dd){
	  if(dd == 1) ofile << " {";
	  else ofile << "  ,";
      ofile << word_map[dd-1]<< endl;
	}
	ofile << " }" << endl;
	ofile << "};" << endl;
	
 @*2 Emit Terminals' thread bit maps and global |T_ARRAY_HAVING_THD_IDS__|.\fbreak
 Go tell it to the ? or is it Yacco2?
 @<emit array of Terminals' thread bit maps@>=
	 KCHARP T_array_type = 
     "struct t_array_type {\n"
	 "  yacco2::USINT no_entries__;\n"
     "  yacco2::thd_ids_having_T* first_entry__[%i];\n"
     "};";
	int x = sprintf(a,T_array_type,no_of_T);
       ofile.write(a,x);
      ofile << std::endl;

	 KCHARP T_array = 
     "t_array_type t_array = {\n"
	 "  %i\n"
	 "  ,{";
	  x = sprintf
        (a
        ,T_array
		,no_of_T
		);
       ofile.write(a,x);
      ofile << std::endl;

  i = T_THREAD_ID_LIST.begin();
  ie = T_THREAD_ID_LIST.end();@>@/
  @<print out each thread set@>;
  ofile << "   }\n};" << endl;
  ofile << "void* yacco2::T_ARRAY_HAVING_THD_IDS__ = (void*)&t_array;" << endl;

@*2 Print each entry.\fbreak
More coughing. Oh well.
@<print out each thread set@>= 
  bool first_item(true);// regulates if a comma should be emitted
  for(int t_id = -1;i!=ie;++i){
    ++t_id;  
	table_entry* t_entry = T_DICTIONARY[t_id];@/
        tth_in_stbl* t_in_stbl= (tth_in_stbl*)t_entry->symbol_;
        T_attributes* t_att= t_in_stbl->t_in_stbl();
        INT_SET_type& th_list = *i;
    if(th_list.empty() == true){// no thds with this T as first set
      if(first_item == true) first_item = false;
	  else ofile << "    ,";
	  KCHARP T_array_entries = "%s// %s";
 	  int x = sprintf(a,T_array_entries,"0",t_att->fully_qualified_T_name_.c_str());
       ofile.write(a,x);
      ofile << std::endl;
	  continue;
	}else{    
        if(first_item == true) first_item = false;
		else ofile << "    ,";
		KCHARP T_list_to_thd_list_var = "(yacco2::thd_ids_having_T*)&T_%i // %s";
 
        int x = sprintf(a,T_list_to_thd_list_var,t_id,t_att->fully_qualified_T_name_.c_str());
       ofile.write(a,x);
      ofile << std::endl;
	}
  }

@** Main line of Linker.
@<accrue linker code@>=
YACCO2_define_trace_variables();
yacco2::TOKEN_GAGGLE Error_queue;@/
STBL_T_ITEMS_type STBL_T_ITEMS;
std::vector<NS_yacco2_terminals::table_entry*> GRAMMAR_DICTIONARY;@/
std::map<std::string, std::vector<std::string> > USED_THREADS_LIST;@/
std::vector<NS_yacco2_terminals::table_entry*> T_DICTIONARY;@/
INT_SET_LIST_type T_THREAD_ID_LIST;

int NO_OF_THREADS(0);@/
int NO_WORDS_FOR_BIT_MAP(0);
char Visit_graph[RESERVE_FIXED_NO_THREADS];
extern void XLATE_SYMBOLS_FOR_cweave(const char* Sym_to_xlate,char* Xlated_sym);
extern void PRINT_CALLED_THREAD_LIST
    (yacco2::AST* Node,std::ofstream* Ow_linker_file,int Recursion_level);
string cntl_file_name;
yacco2::CHAR PRT_SW('n');

int main(int argc, char* argv[])
{
  cout << yacco2::O2linker_VERSION << std::endl;
  using namespace yacco2;
  using namespace std;
  load_linkkws_into_tbl();
  cout << "Get command line and parse it " << endl;
  GET_CMD_LINE(argc,argv,Linker_holding_file,Error_queue);
  @<if error queue not empty then deal with posted errors@>;
  LINKER_PARSE_CMD_LINE(Linker_holding_file,cntl_file_name,Error_queue);
  @<if error queue not empty then deal with posted errors@>;
  lrclog << yacco2::O2linker_VERSION << std::endl;
  @<parse linker control file@>;
  @<parse T alphabet@>;
  @<parse fsc files@>;
  @<post verify that there are no threads ``used'' and not ``defined''@>;
  @<sort thread dictionary@>;
  @<dump sorted dictionary@>;
  @<count and re-align threads enumerate values to sorted position@>;
  @<check whether Linker has enough space to gen thread bit maps: no throw up@>;
  @<generate threads final first sets@>;
  @<emit code@>;
  @<generate linker document@>;
  //|yacco2::Parallel_threads_shutdown(linker_cntl_file);|
return 0;
}