Merge Herbert's bibtex patch; it doesn't introduce any new bugs and

it's nice ...

Herbert please look at the bugs I reported concerning when there is no cls etc. list please.
For this and FormTexinfo


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4442 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/controllers/ChangeLog

@@ -1,3 +1,8 @@
+2002-06-18  Herbert Voss  <voss@perce.de>
+
+	* tex_helpers.[Ch]: move functions from ControlTexinfo into this
+	helperstuff. Now the bibtex gui can use some of these functions
+
 2002-06-18  John Levon  <moz@compsoc.man.ac.uk>
 
 	* ControlGraphics.C: just make the mask *.*

src/frontends/controllers/ControlBibtex.C

@@ -23,6 +23,7 @@
 #include "BufferView.h"
 #include "lyxrc.h"
 #include "helper_funcs.h"
+#include "tex_helpers.h"
 #include "gettext.h"
 
 #include "frontends/LyXView.h"
@@ -35,6 +36,7 @@ ControlBibtex::ControlBibtex(LyXView & lv, Dialogs & d)
 {}
 
 
+
 void ControlBibtex::applyParamsToInset()
 {
 	if (params().getContents() != inset()->params().getContents())
@@ -63,3 +65,15 @@ string const ControlBibtex::Browse(string const & in_name,
 	return browseRelFile(&lv_, in_name, lv_.buffer()->filePath(),
 			     title, pattern, dir1);
 }
+
+
+string const ControlBibtex::getBibStyles() const
+{
+	return getTexFileList("bstFiles.lst", false);
+}
+
+
+void ControlBibtex::rescanBibStyles() const
+{
+	rescanTexStyles();
+}

src/frontends/controllers/ControlBibtex.h

@@ -31,6 +31,11 @@ public:
 	ControlBibtex(LyXView &, Dialogs &);
 	/// Browse for a file
 	string const Browse(string const &, string const &, string const &);
+	/// get the list of bst files
+	string const getBibStyles() const;
+	/// build filelists of all availabe bst/cls/sty-files. done through
+	/// kpsewhich and an external script, saved in *Files.lst
+	void rescanBibStyles() const;
 	 
 private:
 	/// Dispatch the changed parameters to the kernel.

src/frontends/controllers/ControlTexinfo.C

@@ -22,11 +22,11 @@
 #include "BufferView.h"
 #include "gettext.h"
 #include "helper_funcs.h"
+#include "tex_helpers.h"
 
 #include "frontends/LyXView.h"
 
 #include "support/filetools.h" // FileSearch
-#include "support/systemcall.h"
 #include "support/path.h"
 #include "support/lstrings.h"
 
@@ -42,86 +42,41 @@ ControlTexinfo::ControlTexinfo(LyXView & lv, Dialogs & d)
 // kpsewhich and an external script, saved in *Files.lst
 void ControlTexinfo::rescanStyles() const
 {
-	// Run rescan in user lyx directory
+    rescanTexStyles();
-	Path p(user_lyxdir);
-	Systemcall one;
-	one.startscript(Systemcall::Wait,
-			LibFileSearch("scripts", "TeXFiles.sh"));
-	p.pop();
 }
 
 
 void ControlTexinfo::runTexhash() const
 {
-	// Run texhash in user lyx directory
+    texhash();
-	Path p(user_lyxdir);
-
-	//path to texhash through system
-	Systemcall one;
-	one.startscript(Systemcall::Wait, "texhash");
-
-	p.pop();
-//	Alert::alert(_("texhash run!"),
-//		   _("rebuilding of the TeX-tree could only be successfull"),
-//		   _("if you have had user-write-permissions to the tex-dir."));
 }
 
 
-namespace {
-
-string const sortEntries(string & str_in)
-{
-	std::vector<string> dbase = getVectorFromString(str_in,"\n");
-	std::sort(dbase.begin(), dbase.end());		// sort entries
-	std::vector<string>::iterator p =
-	    std::unique(dbase.begin(), dbase.end());	// compact
-	dbase.erase(p, dbase.end());			// shrink
-	return getStringFromVector(dbase,"\n");
-}
-
-} //namespace anon
-
-
 string const
 ControlTexinfo::getContents(texFileSuffix type, bool withFullPath) const
 {
-	static string const bstFilename("bstFiles.lst");
-	static string const clsFilename("clsFiles.lst");
-	static string const styFilename("styFiles.lst");
-
-	string filename;
 	switch (type) {
 	    case bst: 
-		filename = bstFilename;
+		return getTexFileList("bstFiles.lst", withFullPath);
 		break;
 	    case cls:
-		filename = clsFilename;
+		return getTexFileList("clsFiles.lst", withFullPath);
 		break;
 	    case sty:
-		filename = styFilename;
+		return getTexFileList("styFiles.lst", withFullPath);
 		break;
 	}
-
+	return string();
-	string fileContents = GetFileContents(LibFileSearch(string(),filename));
-	// everything ok?
-	if (!fileContents.empty()) {
-		if (withFullPath)
-			return(sortEntries(fileContents));
-		else {
-			int Entries = 1;
-			string dummy = OnlyFilename(token(fileContents,'\n',1));
-			string contents = dummy;
-			do {
-				dummy = OnlyFilename(token(fileContents,'\n',++Entries));
-				contents += ("\n"+dummy);
-			} while (!dummy.empty());
-			return(sortEntries(contents));
-		}
-	} else
-		return _("Missing filelist. try Rescan");
 }
 
+
 void ControlTexinfo::viewFile(string const filename) const
 {
 	lv_.getDialogs()->showFile(filename);
 }
+
+
+string const ControlTexinfo::getClassOptions(string const & filename) const
+{
+	return getListOfOptions(filename, "cls");
+}

src/frontends/controllers/ControlTexinfo.h

@@ -30,13 +30,15 @@ public:
 	enum texFileSuffix {cls, sty, bst};
 	///
 	ControlTexinfo(LyXView &, Dialogs &);
-	///
+	/// show contents af a file
 	void viewFile(string const filename) const;
-	///
+	/// show all classoptions
+	string const getClassOptions(string const & filename) const;
+	/// build new cls bst sty - lists
 	void rescanStyles() const;
-	///
+	/// build new bst sty cls lists
 	void runTexhash() const;
-	///
+	/// read filecontents
 	string const getContents(texFileSuffix type, bool withPath) const;
 
 

src/frontends/controllers/Makefile.am

@@ -15,6 +15,8 @@ libcontrollers_la_SOURCES= \
 	character.h \
 	frnt_lang.C \
 	frnt_lang.h \
+	tex_helpers.C \
+	tex_helpers.h \
 	ButtonController.h \
 	ButtonControllerBase.C \
 	ButtonControllerBase.h \

src/frontends/controllers/tex_helpers.C

@@ -0,0 +1,125 @@
+/**
+ * \file tex_helpers.C
+ * Copyright 1995-2002 the LyX Team
+ * Read the file COPYING
+ *
+ * \author Herbert Voss <voss@lyx.org>
+ */
+
+#include <config.h>
+#include <vector.h>
+#include <fstream>
+#include <algorithm>
+
+#include "gettext.h"
+
+#include "tex_helpers.h"
+#include "support/filetools.h"
+#include "debug.h"
+#include "support/lstrings.h"
+#include "support/systemcall.h"
+#include "support/path.h"
+#include "support/lyxalgo.h"
+
+using std::vector;
+using std::sort;
+using std::unique;
+
+extern string user_lyxdir; // home of *Files.lst
+
+namespace {
+
+vector<string> listWithoutPath(vector<string> & dbase)
+{
+	vector<string>::iterator it = dbase.begin();
+	vector<string>::iterator end = dbase.end();
+	for (; it != end; ++it) 
+		*it = OnlyFilename(*it);
+	return dbase;
+}
+
+}
+
+// build filelists of all availabe bst/cls/sty-files. done through
+// kpsewhich and an external script, saved in *Files.lst
+void rescanTexStyles()
+{
+	// Run rescan in user lyx directory
+	Path p(user_lyxdir);
+	Systemcall one;
+	one.startscript(Systemcall::Wait,
+			LibFileSearch("scripts", "TeXFiles.sh"));
+	p.pop();
+}
+
+
+void texhash()
+{
+	// Run texhash in user lyx directory
+	Path p(user_lyxdir);
+
+	//path to texhash through system
+	Systemcall one;
+	one.startscript(Systemcall::Wait,"texhash"); 
+	p.pop();
+}
+
+string const getTexFileList(string const & filename, bool withFullPath)
+{
+	vector<string> dbase = getVectorFromString(
+		GetFileContents(LibFileSearch(string(),filename)), "\n");
+	lyx::eliminate_duplicates(dbase); 
+	string const str_out = withFullPath ?
+		getStringFromVector(dbase, "\n") :
+		getStringFromVector(listWithoutPath(dbase), "\n");
+	// everything ok?
+	if (str_out.empty())
+		return _("Missing filelist. try Rescan");
+	return str_out;
+}
+
+
+string const getListOfOptions(string const & classname,
+			    string const & type)
+{
+	string const filename = getTexFileFromList(classname,type);
+	string optionList = string();
+	std::ifstream is(filename.c_str());
+	while (is) {
+	    string s;
+	    is >> s;
+	    if (contains(s,"DeclareOption")) {
+		s = s.substr(s.find("DeclareOption"));
+		s = split(s,'{');		// cut front
+		s = token(s,'}',0);		// cut end
+// FIXME: why is this commented out ?
+//		s = s.substr(0, s.find('}')+1); // format entry
+		optionList += (s + '\n');
+	    }
+	}
+	return optionList;
+}
+
+
+string const getTexFileFromList(string const & file, 
+			    string const & type)
+{
+	string const file_ = (type == "cls") ? file + ".cls" : file + ".sty";
+ 
+	lyxerr << "Search for classfile " << file_ << endl;
+ 
+	string const lstfile = (type == "cls") ? "clsFiles.lst" : "styFiles.lst";
+	string const allClasses = GetFileContents(LibFileSearch(string(), lstfile));
+	int entries = 0;
+	string classfile = token(allClasses, '\n', entries);
+	int count = 0;
+	while ((!contains(classfile, file) || 
+		(OnlyFilename(classfile) != file)) &&
+		(++count < 1000)) {
+		classfile = token(allClasses, '\n', ++entries);
+	}
+ 
+	// now we have filename with full path
+	lyxerr << "with full path: " << classfile << endl;
+	return classfile;
+}

src/frontends/controllers/tex_helpers.h

@@ -0,0 +1,30 @@
+/**
+ * \file tex_helpers.h
+ * Copyright 1995-2002 the LyX Team
+ * Read the file COPYING
+ *
+ * \author Herbert Voss <voss@lyx.org>
+ */
+
+#ifndef TEX_HELPERS_H
+#define TEX_HELPERS_H
+
+// build filelists of all availabe bst/cls/sty-files. done through
+// kpsewhich and an external script, saved in *Files.lst
+void rescanTexStyles();
+
+/// rebuild the textree
+void texhash();
+
+/// return one of the three texfiles
+string const getTexFileList(string const & filename, bool withFullPath);
+
+/// get the options of stylefile
+string const getListOfOptions(string const & classname,
+			    string const & type);
+
+/// get a class with full path from the list
+string const getTexFileFromList(string const & classname,
+			    string const & type);
+
+#endif // TEX_HELPERS_H

src/frontends/xforms/ChangeLog

@@ -1,3 +1,15 @@
+2002-06-20  John Levon  <moz@compsoc.man.ac.uk>
+
+	* FormBibtex.C: use new lyx::eliminate_duplicates
+
+2002-06-20 Herbert Voss  <voss@perce.de>
+ 
+  	* FormBibtex.C:
+  	* forms/form_bibtex.fd: give better support for choosing the
+  	bibstyle (new browserfield with the available bibstyles). 
+  	move some code of ControlTexinfo into a helper
+  	file support/tex-helpers to use some of the functions
+ 
 2002-06-20  John Levon  <moz@compsoc.man.ac.uk>
 
 	* XWorkArea.h:

src/frontends/xforms/FormBibtex.C

@@ -27,6 +27,7 @@
 #include "support/LAssert.h"
 #include "support/lstrings.h"
 #include "support/filetools.h"
+#include "support/lyxalgo.h"
 
 
 using std::vector;
@@ -57,6 +58,8 @@ void FormBibtex::build()
 	bc().addReadOnly(dialog_->button_database_browse);
 	bc().addReadOnly(dialog_->input_database);
 	bc().addReadOnly(dialog_->button_style_browse);
+	bc().addReadOnly(dialog_->button_style_choose);
+	bc().addReadOnly(dialog_->button_rescan);
 	bc().addReadOnly(dialog_->input_style);
 	bc().addReadOnly(dialog_->check_bibtotoc);
 
@@ -64,14 +67,21 @@ void FormBibtex::build()
 	string str = _("The database you want to cite from. Insert it without the default extension \".bib\". If you insert it with the browser, LyX strips the extension. Several databases must be separated by a comma: \"natbib, books\".");
 	tooltips().init(dialog_->button_database_browse, str);
 
-	str = _("Browse your directory for BibTeX stylefiles.");
+	str = _("Browse your directory for BibTeX stylefiles");
 	tooltips().init(dialog_->button_style_browse, str);
 
-	str = _("The BibTeX style to use (only one allowed). Insert it without the default extension \".bst\" and without path. Most of the bibstyles are stored in $TEXMF/bibtex/bst. $TEXMF is the root dir of the local TeX tree. In \"View->TeX Information\" you can list all installed styles.");
+	str = _("The BibTeX style to use (only one allowed). Insert it without the default extension \".bst\" and without path or choose one from the browsers list. Most of the bibstyles are stored in $TEXMF/bibtex/bst. $TEXMF is the root dir of the local TeX tree.");
 	tooltips().init(dialog_->input_style, str);
 
-	str = _("Activate this option if you want the bibliography to appear in the Table of Contents (which doesn't happen by default).");
+	str = _("Activate this option if you want the bibliography to appear in the Table of Contents (which doesn't happen by default)");
 	tooltips().init(dialog_->check_bibtotoc, str);
+	
+	str = _("Choose a BibTeX style from the browsers list");
+	tooltips().init(dialog_->button_style_choose, str);
+	
+	str = _("Updates your TeX system for a new bibstyle list. Only the styles which are in directories where TeX finds them are listed!");
+	tooltips().init(dialog_->button_rescan, str);
+	
 }
 
 
@@ -93,9 +103,7 @@ ButtonPolicy::SMInput FormBibtex::input(FL_OBJECT * ob, long)
 			fl_set_input(dialog_->input_database, out_name.c_str());
 			fl_unfreeze_form(form());
 		}
-	}
+	} else if (ob == dialog_->button_style_browse) {
-
-	if (ob == dialog_->button_style_browse) {
 		string const in_name = fl_get_input(dialog_->input_style);
 		string out_name =
 			controller().Browse(in_name,
@@ -106,9 +114,17 @@ ButtonPolicy::SMInput FormBibtex::input(FL_OBJECT * ob, long)
 			fl_set_input(dialog_->input_style, out_name.c_str());
 			fl_unfreeze_form(form());
 		}
-	}
+	} else if (ob == dialog_->button_style_choose) {
+		unsigned int selection = fl_get_browser(dialog_->browser_styles);
+		string const out_name = 
+			fl_get_browser_line(dialog_->browser_styles, selection);
+		fl_set_input(dialog_->input_style, 
+			ChangeExtension(out_name, string()).c_str());
+	} else if (ob == dialog_->button_rescan)
+		controller().rescanBibStyles();
 
-	if (!compare(fl_get_input(dialog_->input_database),"")) {
+	// with an empty database nothing makes sense ...
+	if (!compare(fl_get_input(dialog_->input_database), "")) {
 		return ButtonPolicy::SMI_NOOP;
 	}
 
@@ -122,43 +138,35 @@ void FormBibtex::update()
 		     controller().params().getContents().c_str());
 	string bibtotoc = "bibtotoc";
 	string bibstyle (controller().params().getOptions().c_str());
-	if (prefixIs(bibstyle,bibtotoc)) { // bibtotoc exists?
+	if (prefixIs(bibstyle, bibtotoc)) { // bibtotoc exists?
 		fl_set_button(dialog_->check_bibtotoc,1);
-		if (contains(bibstyle,',')) { // bibstyle exists?
+		if (contains(bibstyle, ',')) { // bibstyle exists?
-			bibstyle = split(bibstyle,bibtotoc,',');
+			bibstyle = split(bibstyle, bibtotoc, ',');
 		} else {
-			bibstyle = "";
+			bibstyle = string();
 		}
 
-		fl_set_input(dialog_->input_style,bibstyle.c_str());
+		fl_set_input(dialog_->input_style, bibstyle.c_str());
 
 	} else {
 		fl_set_button(dialog_->check_bibtotoc,0);
-		fl_set_input(dialog_->input_style,bibstyle.c_str());
+		fl_set_input(dialog_->input_style, bibstyle.c_str());
 	}
+	string const str =
+		controller().getBibStyles();
+	fl_add_browser_line(dialog_->browser_styles, str.c_str());
 }
 
 namespace {
 
-// Remove all duplicate entries in c.
-// Taken stright out of Stroustrup
-template<class C>
-void eliminate_duplicates(C & c)
-{
-	sort(c.begin(), c.end());
-	typename C::iterator p = std::unique(c.begin(), c.end());
-	c.erase(p, c.end());
-}
-
-
 string const unique_and_no_extensions(string const & str_in)
 {
 	vector<string> dbase = getVectorFromString(str_in);
 	for (vector<string>::iterator it = dbase.begin();
 	     it != dbase.end(); ++it) {
-		*it = ChangeExtension(*it, "");
+		*it = ChangeExtension(*it, string());
 	}
-	eliminate_duplicates(dbase);
+	lyx::eliminate_duplicates(dbase);
 	return getStringFromVector(dbase);
 }
 
@@ -188,7 +196,7 @@ void FormBibtex::apply()
 
 	if (bibtotoc && (!bibstyle.empty())) {
 		// both bibtotoc and style
-		controller().params().setOptions("bibtotoc,"+bibstyle);
+		controller().params().setOptions("bibtotoc," + bibstyle);
 
 	} else if (bibtotoc) {
 		// bibtotoc and no style

src/frontends/xforms/forms/form_bibtex.fd

@@ -9,14 +9,14 @@ SnapGrid: 1
 
 =============== FORM ===============
 Name: form_bibtex
-Width: 450
+Width: 312
-Height: 160
+Height: 358
-Number of Objects: 8
+Number of Objects: 11
 
 --------------------
 class: FL_BOX
 type: UP_BOX
-box: 0 0 450 160
+box: 0 0 312 358
 boxtype: FL_UP_BOX
 colors: FL_COL1 FL_COL1
 alignment: FL_ALIGN_CENTER
@@ -34,10 +34,10 @@ argument:
 --------------------
 class: FL_INPUT
 type: NORMAL_INPUT
-box: 90 10 245 30
+box: 15 29 164 28
 boxtype: FL_DOWN_BOX
 colors: FL_COL1 FL_MCOL
-alignment: FL_ALIGN_LEFT
+alignment: FL_ALIGN_TOP_LEFT
 style: FL_NORMAL_STYLE
 size: FL_NORMAL_SIZE
 lcol: FL_BLACK
@@ -52,7 +52,7 @@ argument: 0
 --------------------
 class: FL_BUTTON
 type: RETURN_BUTTON
-box: 250 120 90 30
+box: 12 316 90 30
 boxtype: FL_UP_BOX
 colors: FL_COL1 FL_COL1
 alignment: FL_ALIGN_CENTER
@@ -70,7 +70,7 @@ argument: 3
 --------------------
 class: FL_BUTTON
 type: NORMAL_BUTTON
-box: 350 120 90 30
+box: 112 316 90 30
 boxtype: FL_UP_BOX
 colors: FL_COL1 FL_COL1
 alignment: FL_ALIGN_CENTER
@@ -88,10 +88,10 @@ argument: 2
 --------------------
 class: FL_INPUT
 type: NORMAL_INPUT
-box: 90 45 245 30
+box: 14 80 166 26
 boxtype: FL_DOWN_BOX
 colors: FL_COL1 FL_MCOL
-alignment: FL_ALIGN_LEFT
+alignment: FL_ALIGN_TOP_LEFT
 style: FL_NORMAL_STYLE
 size: FL_NORMAL_SIZE
 lcol: FL_BLACK
@@ -106,7 +106,7 @@ argument: 0
 --------------------
 class: FL_BUTTON
 type: NORMAL_BUTTON
-box: 340 10 100 29
+box: 192 29 100 29
 boxtype: FL_UP_BOX
 colors: FL_COL1 FL_COL1
 alignment: FL_ALIGN_CENTER
@@ -124,7 +124,61 @@ argument: 0
 --------------------
 class: FL_BUTTON
 type: NORMAL_BUTTON
-box: 340 45 100 30
+box: 195 167 100 30
+boxtype: FL_UP_BOX
+colors: FL_COL1 FL_COL1
+alignment: FL_ALIGN_CENTER
+style: FL_NORMAL_STYLE
+size: FL_DEFAULT_SIZE
+lcol: FL_BLACK
+label: Choose|#C
+shortcut: 
+resize: FL_RESIZE_ALL
+gravity: FL_NoGravity FL_NoGravity
+name: button_style_choose
+callback: C_FormBaseInputCB
+argument: 0
+
+--------------------
+class: FL_CHECKBUTTON
+type: PUSH_BUTTON
+box: 12 258 30 30
+boxtype: FL_NO_BOX
+colors: FL_COL1 FL_YELLOW
+alignment: FL_ALIGN_CENTER
+style: FL_NORMAL_STYLE
+size: FL_DEFAULT_SIZE
+lcol: FL_BLACK
+label: Add bibliography to TOC|#A
+shortcut: 
+resize: FL_RESIZE_ALL
+gravity: FL_NoGravity FL_NoGravity
+name: check_bibtotoc
+callback: C_FormBaseInputCB
+argument: 0
+
+--------------------
+class: FL_BROWSER
+type: HOLD_BROWSER
+box: 14 129 168 111
+boxtype: FL_DOWN_BOX
+colors: FL_COL1 FL_YELLOW
+alignment: FL_ALIGN_TOP_LEFT
+style: FL_NORMAL_STYLE
+size: FL_NORMAL_SIZE
+lcol: FL_BLACK
+label: Available Styles|#v
+shortcut: 
+resize: FL_RESIZE_ALL
+gravity: FL_NoGravity FL_NoGravity
+name: browser_styles
+callback: C_FormBaseInputCB
+argument: 0
+
+--------------------
+class: FL_BUTTON
+type: NORMAL_BUTTON
+box: 192 79 100 30
 boxtype: FL_UP_BOX
 colors: FL_COL1 FL_COL1
 alignment: FL_ALIGN_CENTER
@@ -140,20 +194,20 @@ callback: C_FormBaseInputCB
 argument: 0
 
 --------------------
-class: FL_CHECKBUTTON
+class: FL_BUTTON
-type: PUSH_BUTTON
+type: NORMAL_BUTTON
-box: 90 80 30 30
+box: 196 208 100 30
-boxtype: FL_NO_BOX
+boxtype: FL_UP_BOX
-colors: FL_COL1 FL_YELLOW
+colors: FL_COL1 FL_COL1
 alignment: FL_ALIGN_CENTER
 style: FL_NORMAL_STYLE
 size: FL_DEFAULT_SIZE
 lcol: FL_BLACK
-label: Add bibliography to TOC|#A
+label: Update List|#U
 shortcut: 
 resize: FL_RESIZE_ALL
 gravity: FL_NoGravity FL_NoGravity
-name: check_bibtotoc
+name: button_rescan
 callback: C_FormBaseInputCB
 argument: 0
 

src/support/ChangeLog

@@ -1,3 +1,7 @@
+2002-06-19  John Levon  <moz@compsoc.man.ac.uk>
+
+	* lyxalgo.h: add eliminate_duplicates
+
 2002-06-17  Herbert Voss  <voss@perce.de>
 
 	* filetools.[C]: (readBB_from_PSFile) add a helperfunc

src/support/lyxalgo.h

@@ -9,8 +9,6 @@
  * \author unknown
  */
 
- 
-
 #ifndef LYX_ALGO_H
 #define LYX_ALGO_H
 
@@ -87,6 +85,15 @@ count (Iterator first, Iterator last, T const & value)
 #endif
 }
 
+/// Remove all duplicate entries in c.
+template<class C>
+void eliminate_duplicates(C & c)
+{
+	std::sort(c.begin(), c.end());
+	typename C::iterator p = std::unique(c.begin(), c.end());
+	c.erase(p, c.end());
+}
+
 } // namespace lyx
 
 #endif // LYX_ALGO_H

src/support/lyxfunctional.h

@@ -14,7 +14,6 @@
 
 namespace lyx {
 
-
 template<class R, class C, class A>
 class class_fun_t {
 public: