Fixing clang compiler warnings

src/libslic3r/PrintApply.cpp

@@ -920,7 +920,7 @@ static PrintObjectRegions* generate_print_object_regions(
                             const PrintObjectRegions::VolumeRegion &parent_region = layer_range.volume_regions[parent_region_id];
                             const ModelVolume                      &parent_volume = *parent_region.model_volume;
                             if (parent_volume.is_model_part() || parent_volume.is_modifier())
-                                if (PrintObjectRegions::BoundingBox parent_bbox = find_modifier_volume_extents(layer_range, parent_region_id); parent_bbox.intersects(*bbox))
+                                if (PrintObjectRegions::BoundingBox parent_bbox = find_modifier_volume_extents(layer_range, parent_region_id); parent_bbox.intersects(*bbox)) {
                                     // Only create new region for a modifier, which actually modifies config of it's parent.
                                     if (PrintRegionConfig config = region_config_from_model_volume(parent_region.region->config(), nullptr, volume, num_extruders); 
                                         config != parent_region.region->config()) {
@@ -928,6 +928,7 @@ static PrintObjectRegions* generate_print_object_regions(
                                         layer_range.volume_regions.push_back({ &volume, parent_region_id, get_create_region(std::move(config)), bbox });
                                     } else if (parent_model_part_id == -1 && parent_volume.is_model_part())
                                         parent_model_part_id = parent_region_id;
+                                }
                         }
                         if (! added && parent_model_part_id >= 0)
                             // This modifier does not override any printable volume's configuration, however it may in the future.

src/libslic3r/SupportMaterial.cpp

@@ -2355,7 +2355,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::bottom_conta
         Polygons *layer_buildplate_covered = buildplate_covered.empty() ? nullptr : &buildplate_covered[layer_id];
         // Filtering the propagated support columns to two extrusions, overlapping by maximum 20%.
         float column_propagation_filtering_radius = scaled<float>(0.8 * 0.5 * (m_support_params.support_material_flow.spacing() + m_support_params.support_material_flow.width()));
-        task_group.run([&grid_params, &overhangs_projection, &overhangs_projection_raw, &layer, &layer_support_area, layer_buildplate_covered, column_propagation_filtering_radius
+        task_group.run([&grid_params, &overhangs_projection, &overhangs_projection_raw, &layer, &layer_support_area, layer_buildplate_covered /* , column_propagation_filtering_radius */
 #ifdef SLIC3R_DEBUG 
             , iRun, layer_id
 #endif /* SLIC3R_DEBUG */

src/libslic3r/TriangleMesh.cpp

@@ -1090,7 +1090,7 @@ indexed_triangle_set its_convex_hull(const std::vector<Vec3f> &pts)
             centroid += pt;
         centroid /= float(pts.size());
     #endif // NDEBUG
-        for (const orgQhull::QhullFacet facet : qhull.facetList()) {
+        for (const orgQhull::QhullFacet &facet : qhull.facetList()) {
             // Collect face vertices first, allocate unique vertices in dst_vertices based on QHull's vertex ID.
             Vec3i  indices;
             int    cnt = 0;

src/libslic3r/TriangleMeshSlicer.cpp

@@ -560,9 +560,9 @@ void slice_facet_with_slabs(
                         // Save the open edge for sure.
                         type = FacetSliceType::Slicing;
                     } else {
+#ifndef NDEBUG
                         const stl_triangle_vertex_indices &neighbor = mesh_triangles[neighbor_idx];
                         float z = *it;
-#ifndef NDEBUG
                         int num_on_plane = (mesh_vertices[neighbor(0)].z() == z) + (mesh_vertices[neighbor(1)].z() == z) + (mesh_vertices[neighbor(2)].z() == z);
                         assert(num_on_plane == 2 || num_on_plane == 3);
 #endif // NDEBUG

src/slic3r/GUI/DoubleSlider.hpp

@@ -115,7 +115,7 @@ class TickCodeInfo
     bool        m_suppress_plus     = false;
     bool        m_suppress_minus    = false;
     bool        m_use_default_colors= false;
-    int         m_default_color_idx = 0;
+//    int         m_default_color_idx = 0;
 
     std::vector<std::string>* m_colors {nullptr};
 

src/slic3r/GUI/ExtraRenderers.cpp

@@ -223,7 +223,8 @@ bool BitmapTextRenderer::GetValueFromEditorCtrl(wxWindow* ctrl, wxVariant& value
     if (!text_editor || text_editor->GetValue().IsEmpty())
         return false;
 
-    if (m_was_unusable_symbol = Slic3r::GUI::Plater::has_illegal_filename_characters(text_editor->GetValue()))
+    m_was_unusable_symbol = Slic3r::GUI::Plater::has_illegal_filename_characters(text_editor->GetValue());
+    if (m_was_unusable_symbol)
         return false;
 
     // The icon can't be edited so get its old value and reuse it.

src/slic3r/GUI/GUI_App.cpp

@@ -535,7 +535,7 @@ wxString file_wildcards(FileType file_type, const std::string &custom_extension)
         }
     }
 
-    for (const std::string_view ext : data.file_extensions)
+    for (const std::string_view &ext : data.file_extensions)
         // Only add an extension if it was not added first as the custom extension.
         if (ext != custom_ext_lower) {
             if (title.empty()) {

src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.hpp

@@ -97,7 +97,7 @@ public:
     // will be also extended to support additional states, requiring at least one state to remain free out of 19 states.
     static const constexpr size_t EXTRUDERS_LIMIT = 16;
 
-    virtual const float get_cursor_radius_min() const { return CursorRadiusMin; }
+    const float get_cursor_radius_min() const override { return CursorRadiusMin; }
 
 protected:
     std::array<float, 4> get_cursor_sphere_left_button_color() const override;

src/slic3r/GUI/Gizmos/GLGizmoSimplify.hpp

@@ -39,7 +39,7 @@ protected:
     virtual void on_render() override;
     virtual void on_render_for_picking() override{};    
 
-    virtual CommonGizmosDataID on_get_requirements() const;
+    CommonGizmosDataID on_get_requirements() const override;
 
 private:
     void apply_simplify();

src/slic3r/Utils/AstroBox.hpp

@@ -26,7 +26,7 @@ public:
     bool upload(PrintHostUpload upload_data, ProgressFn prorgess_fn, ErrorFn error_fn) const override;
     bool has_auto_discovery() const override { return true; }
     bool can_test() const override { return true; }
-    PrintHostPostUploadActions get_post_upload_actions() const { return PrintHostPostUploadAction::StartPrint; }
+    PrintHostPostUploadActions get_post_upload_actions() const override { return PrintHostPostUploadAction::StartPrint; }
     std::string get_host() const override { return host; }
     
 protected: