This patch fixes a bug on machines where char is unsigned by default, by

[ginac.git] / ginac / clifford.cpp

diff --git a/ginac/clifford.cpp b/ginac/clifford.cpp
index 2d1e40d3c567aa6afb29863e380188f3f9d4bc34..301d40c19640a605842079de30e8281293000918 100644 (file)
--- a/ginac/clifford.cpp
+++ b/ginac/clifford.cpp
@@ -1132,7 +1132,7 @@ ex remove_dirac_ONE(const ex & e, unsigned char rl, unsigned options)
        return e1;
 }
 
-char clifford_max_label(const ex & e, bool ignore_ONE)
+int clifford_max_label(const ex & e, bool ignore_ONE)
 {
        if (is_a<clifford>(e))
                if (ignore_ONE && is_a<diracone>(e.op(0)))
@@ -1140,7 +1140,7 @@ char clifford_max_label(const ex & e, bool ignore_ONE)
                else
                        return ex_to<clifford>(e).get_representation_label();
        else {
-               char rl = -1;
+               int rl = -1;
                for (size_t i=0; i < e.nops(); i++) 
                        rl = (rl > clifford_max_label(e.op(i), ignore_ONE)) ? rl : clifford_max_label(e.op(i), ignore_ONE);
                return rl;