.

CImg.h

@@ -21071,6 +21071,15 @@ namespace cimg_library {
                 _cimg_mp_scalar1(mp_isbool,arg1);
               }
 
+              if (!std::strncmp(ss,"isconst(",8)) { // Is constant?
+                _cimg_mp_op("Function 'isconst()'");
+                if (ss8==se1) _cimg_mp_return(0);
+                try { arg1 = compile(ss8,se1,depth1,0,block_flags); }
+                catch(CImgException&) { _cimg_mp_return(0); }
+                if (_cimg_mp_is_const_scalar(arg1)) _cimg_mp_return(1);
+                _cimg_mp_return(0);
+              }
+
               if (!std::strncmp(ss,"isdir(",6)) { // Is directory?
                 _cimg_mp_op("Function 'isdir()'");
                 arg1 = compile(ss6,se1,depth1,0,block_flags);
@@ -65158,7 +65167,7 @@ namespace cimg_library {
     CImg<charT> __display() const {
       CImg<charT> res, str;
       cimglist_for(*this,l) {
-        CImg<charT>::string((char*)_data[l]).move_to(str);
+        CImg<charT>::string((char*)_data[l]._data).move_to(str);
         if (l!=width() - 1) {
           str.resize(str._width + 1,1,1,1,0);
           str[str._width - 2] = ',';