factor out set_extruders() to an STL-style template function. Added set<T> method as well.

xs/src/libslic3r/GCode.cpp

@@ -233,22 +233,6 @@ GCode::apply_print_config(const PrintConfig &print_config)
     this->config.apply(print_config);
 }
 
-void
-GCode::set_extruders(const std::vector<unsigned int> &extruder_ids)
-{
-    this->writer.set_extruders(extruder_ids);
-    
-    // enable wipe path generation if any extruder has wipe enabled
-    this->wipe.enable = false;
-    for (std::vector<unsigned int>::const_iterator it = extruder_ids.begin();
-        it != extruder_ids.end(); ++it) {
-        if (this->config.wipe.get_at(*it)) {
-            this->wipe.enable = true;
-            break;
-        }
-    }
-}
-
 void
 GCode::set_origin(const Pointf &pointf)
 {    

xs/src/libslic3r/GCode.hpp

@@ -12,6 +12,8 @@
 #include "PrintConfig.hpp"
 #include "ConditionalGCode.hpp"
 #include <string>
+#include <vector>
+#include <set>
 
 namespace Slic3r {
 
@@ -98,7 +100,30 @@ class GCode {
     void set_last_pos(const Point &pos);
     bool last_pos_defined() const;
     void apply_print_config(const PrintConfig &print_config);
-    void set_extruders(const std::vector<unsigned int> &extruder_ids);
+
+    /// Template function.
+    template <typename Iter>
+    void set_extruders(Iter begin, Iter end) {
+        this->writer.set_extruders(begin, end);
+        // enable wipe path generation if any extruder has wipe enabled
+        this->wipe.enable = false;
+        for (Iter it = begin; it != end; ++it) {
+            if (this->config.wipe.get_at(*it)) {
+                this->wipe.enable = true;
+                break;
+            }
+        }
+    }
+    template <typename T>
+    void set_extruders(const std::vector<T> &extruder_ids) {
+        this->set_extruders(extruder_ids.cbegin(), extruder_ids.cend());
+    }
+
+    template <typename T>
+    void set_extruders(const std::set<T> &extruder_ids) {
+        this->set_extruders(extruder_ids.cbegin(), extruder_ids.cend());
+    }
+
     void set_origin(const Pointf &pointf);
     std::string preamble();
     std::string notes();

xs/src/libslic3r/GCodeWriter.cpp

@@ -21,18 +21,6 @@ GCodeWriter::apply_print_config(const PrintConfig &print_config)
     this->_extrusion_axis = this->config.get_extrusion_axis();
 }
 
-void
-GCodeWriter::set_extruders(const std::vector<unsigned int> &extruder_ids)
-{
-    for (std::vector<unsigned int>::const_iterator i = extruder_ids.begin(); i != extruder_ids.end(); ++i)
-        this->extruders.insert( std::pair<unsigned int,Extruder>(*i, Extruder(*i, &this->config)) );
-    
-    /*  we enable support for multiple extruder if any extruder greater than 0 is used
-        (even if prints only uses that one) since we need to output Tx commands
-        first extruder has index 0 */
-    this->multiple_extruders = (*std::max_element(extruder_ids.begin(), extruder_ids.end())) > 0;
-}
-
 std::string
 GCodeWriter::notes() 
 {

xs/src/libslic3r/GCodeWriter.hpp

@@ -22,7 +22,24 @@ public:
     Extruder* extruder() const { return this->_extruder; }
     std::string extrusion_axis() const { return this->_extrusion_axis; }
     void apply_print_config(const PrintConfig &print_config);
-    void set_extruders(const std::vector<unsigned int> &extruder_ids);
+
+
+    template <typename Iter>
+    void set_extruders(Iter begin, Iter end) {
+        for (auto i = begin; i != end; ++i)
+            this->extruders.insert( std::pair<unsigned int,Extruder>(*i, Extruder(*i, &this->config)) );
+
+        /*  we enable support for multiple extruder if any extruder greater than 0 is used
+            (even if prints only uses that one) since we need to output Tx commands
+            first extruder has index 0 */
+        this->multiple_extruders = (*std::max_element(begin, end)) > 0;
+    }
+
+    template <typename T>
+    void set_extruders(const std::vector<T> &extruder_ids) { this->set_extruders(extruder_ids.cbegin(), extruder_ids.cend()); }
+    template <typename T>
+    void set_extruders(const std::set<T> &extruder_ids) { this->set_extruders(extruder_ids.cbegin(), extruder_ids.cend()); }
+
     /// Write any notes provided by the user as comments in the gcode header.
     std::string notes();