[muparser] Remove OnDetectVar and Diff

These are unused and useless.

muparser-2.2.5/include/muParser.h

@@ -54,9 +54,6 @@ namespace mu {
     virtual void InitFun();
     virtual void InitConst();
     virtual void InitOprt();
-    virtual void OnDetectVar(string_type *pExpr, int &nStart, int &nEnd);
-
-    ValueOrError Diff(value_type *a_Var, value_type a_fPos, value_type a_fEpsilon = 0) const;
 
    protected:
     // Trigonometric functions

muparser-2.2.5/include/muParserBase.h

@@ -155,8 +155,6 @@ class ParserBase {
     virtual void InitConst() = 0;
     virtual void InitOprt() = 0;
 
-    virtual void OnDetectVar(string_type *pExpr, int &nStart, int &nEnd);
-
     static const char_type *c_DefaultOprt[];
     static std::locale s_locale;  ///< The locale used by the parser
     static bool g_DbgDumpCmdCode;

muparser-2.2.5/src/muParser.cpp

@@ -302,65 +302,4 @@ void Parser::InitOprt() {
     assertNoError(DefineInfixOprt(_T("+"), UnaryPlus));
 }
 
-//---------------------------------------------------------------------------
-void Parser::OnDetectVar(string_type * /*pExpr*/, int & /*nStart*/, int & /*nEnd*/) {
-    // this is just sample code to illustrate modifying variable names on the fly.
-    // I'm not sure anyone really needs such a feature...
-    /*
-
-
-    string sVar(pExpr->begin()+nStart, pExpr->begin()+nEnd);
-    string sRepl = std::string("_") + sVar + "_";
-
-    int nOrigVarEnd = nEnd;
-    cout << "variable detected!\n";
-    cout << "  Expr: " << *pExpr << "\n";
-    cout << "  Start: " << nStart << "\n";
-    cout << "  End: " << nEnd << "\n";
-    cout << "  Var: \"" << sVar << "\"\n";
-    cout << "  Repl: \"" << sRepl << "\"\n";
-    nEnd = nStart + sRepl.length();
-    cout << "  End: " << nEnd << "\n";
-    pExpr->replace(pExpr->begin()+nStart, pExpr->begin()+nOrigVarEnd, sRepl);
-    cout << "  New expr: " << *pExpr << "\n";
-    */
-}
-
-//---------------------------------------------------------------------------
-/** \brief Numerically differentiate with regard to a variable.
-    \param [in] a_Var Pointer to the differentiation variable.
-    \param [in] a_fPos Position at which the differentiation should take place.
-    \param [in] a_fEpsilon Epsilon used for the numerical differentiation.
-
-  Numerical differentiation uses a 5 point operator yielding a 4th order
-  formula. The default value for epsilon is 0.00074 which is
-  numeric_limits<double>::epsilon() ^ (1/5) as suggested in the muparser
-  forum:
-
-  http://sourceforge.net/forum/forum.php?thread_id=1994611&forum_id=462843
-*/
-ValueOrError Parser::Diff(value_type *a_Var, value_type a_fPos, value_type a_fEpsilon) const {
-    value_type fRes(0), fBuf(*a_Var), fEpsilon(a_fEpsilon);
-    ValueOrError f[4] = {0, 0, 0, 0};
-
-    // Backwards compatible calculation of epsilon in case the user doesn't provide
-    // his own epsilon
-    if (fEpsilon == 0) fEpsilon = (a_fPos == 0) ? (value_type)1e-10 : (value_type)1e-7 * a_fPos;
-
-    *a_Var = a_fPos + 2 * fEpsilon;
-    f[0] = Eval();
-    *a_Var = a_fPos + 1 * fEpsilon;
-    f[1] = Eval();
-    *a_Var = a_fPos - 1 * fEpsilon;
-    f[2] = Eval();
-    *a_Var = a_fPos - 2 * fEpsilon;
-    f[3] = Eval();
-    *a_Var = fBuf;  // restore variable
-
-    for (ValueOrError &v : f) {
-        if (!v) return std::move(v);
-    }
-    fRes = (-*f[0] + 8 * *f[1] - 8 * *f[2] + *f[3]) / (12 * fEpsilon);
-    return fRes;
-}
 }  // namespace mu

muparser-2.2.5/src/muParserBase.cpp

@@ -116,9 +116,6 @@ void ParserBase::ReInit() const {
     m_pTokenReader->ReInit();
 }
 
-//---------------------------------------------------------------------------
-void ParserBase::OnDetectVar(string_type * /*pExpr*/, int & /*nStart*/, int & /*nEnd*/) {}
-
 //---------------------------------------------------------------------------
 /** \brief Add a value parsing function.
 

muparser-2.2.5/src/muParserTokenReader.cpp

@@ -615,8 +615,6 @@ bool ParserTokenReader::IsVarTok(token_type &a_Tok) {
 
     if (m_iSynFlags & noVAR) return Error(ecUNEXPECTED_VAR, m_iPos, strTok);
 
-    m_pParser->OnDetectVar(&m_strFormula, m_iPos, iEnd);
-
     m_iPos = iEnd;
     a_Tok.SetVar(item->second, strTok);
     m_UsedVar[item->first] = item->second;  // Add variable to used-var-list