X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fbasic.cpp;h=99c797d542b13556118fdd131e0138c1d7c7103f;hp=96cfd14c46fcd7458aff878993b7496f196950c3;hb=71fdb941e62f5e4bf131bc40468cfa7a4a5c986a;hpb=65f2693a0948d1db0bc68d7656c64e1fed91c158

diff --git a/ginac/basic.cpp b/ginac/basic.cpp
index 96cfd14c..99c797d5 100644
--- a/ginac/basic.cpp
+++ b/ginac/basic.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's ABC. */
 
 /*
- *  GiNaC Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2020 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -373,7 +373,7 @@ ex basic::collect(const ex & s, bool distributed) const
 					pre_coeff = pre_coeff.coeff(li, cexp);
 					key *= pow(li, cexp);
 				}
-				exmap::iterator ci = cmap.find(key);
+				auto ci = cmap.find(key);
 				if (ci != cmap.end())
 					ci->second += pre_coeff;
 				else
@@ -410,7 +410,7 @@ ex basic::collect(const ex & s, bool distributed) const
 }
 
 /** Perform automatic non-interruptive term rewriting rules. */
-ex basic::eval(int level) const
+ex basic::eval() const
 {
 	// There is nothing to do for basic objects:
 	return hold();
@@ -418,25 +418,17 @@ ex basic::eval(int level) const
 
 /** Function object to be applied by basic::evalf(). */
 struct evalf_map_function : public map_function {
-	int level;
-	evalf_map_function(int l) : level(l) {}
-	ex operator()(const ex & e) override { return evalf(e, level); }
+	ex operator()(const ex & e) override { return evalf(e); }
 };
 
 /** Evaluate object numerically. */
-ex basic::evalf(int level) const
+ex basic::evalf() const
 {
 	if (nops() == 0)
 		return *this;
 	else {
-		if (level == 1)
-			return *this;
-		else if (level == -max_recursion_level)
-			throw(std::runtime_error("max recursion level reached"));
-		else {
-			evalf_map_function map_evalf(level - 1);
-			return map(map_evalf);
-		}
+		evalf_map_function map_evalf;
+		return map(map_evalf);
 	}
 }
 
@@ -593,10 +585,11 @@ bool basic::match(const ex & pattern, exmap& repl_lst) const
 ex basic::subs_one_level(const exmap & m, unsigned options) const
 {
 	if (options & subs_options::no_pattern) {
-		auto it = m.find(*this);
+		ex thisex = *this;  // NB: *this may be deleted here.
+		auto it = m.find(thisex);
 		if (it != m.end())
 			return it->second;
-		return *this;
+		return thisex;
 	} else {
 		for (auto & it : m) {
 			exmap repl_lst;
@@ -909,9 +902,6 @@ void basic::ensure_if_modifiable() const
 // global variables
 //////////
 
-int max_recursion_level = 1024;
-
-
 #ifdef GINAC_COMPARE_STATISTICS
 compare_statistics_t::~compare_statistics_t()
 {