Allow movement of AbstractShaderProgram.

src/AbstractShaderProgram.cpp

@@ -88,6 +88,10 @@ Int AbstractShaderProgram::maxSupportedVertexAttributeCount() {
 
 AbstractShaderProgram::AbstractShaderProgram(): _id(glCreateProgram()) {}
 
+AbstractShaderProgram::AbstractShaderProgram(AbstractShaderProgram&& other) noexcept: _id(other._id) {
+    other._id = 0;
+}
+
 AbstractShaderProgram::~AbstractShaderProgram() {
     /* Remove current usage from the state */
     GLuint& current = Context::current()->state()->shaderProgram->current;
@@ -96,6 +100,11 @@ AbstractShaderProgram::~AbstractShaderProgram() {
     if(_id) glDeleteProgram(_id);
 }
 
+AbstractShaderProgram& AbstractShaderProgram::operator=(AbstractShaderProgram&& other) noexcept {
+    std::swap(_id, other._id);
+    return *this;
+}
+
 std::pair<bool, std::string> AbstractShaderProgram::validate() {
     glValidateProgram(_id);
 

src/AbstractShaderProgram.h

@@ -286,11 +286,6 @@ comes in handy.
 class MAGNUM_EXPORT AbstractShaderProgram {
     friend class Context;
 
-    AbstractShaderProgram(const AbstractShaderProgram&) = delete;
-    AbstractShaderProgram(AbstractShaderProgram&&) = delete;
-    AbstractShaderProgram& operator=(const AbstractShaderProgram&) = delete;
-    AbstractShaderProgram& operator=(AbstractShaderProgram&&) = delete;
-
     public:
         template<UnsignedInt, class> class Attribute;
 
@@ -311,6 +306,12 @@ class MAGNUM_EXPORT AbstractShaderProgram {
          */
         explicit AbstractShaderProgram();
 
+        /** @brief Copying is not allowed */
+        AbstractShaderProgram(const AbstractShaderProgram&) = delete;
+
+        /** @brief Move constructor */
+        AbstractShaderProgram(AbstractShaderProgram&& other) noexcept;
+
         /**
          * @brief Destructor
          *
@@ -319,6 +320,12 @@ class MAGNUM_EXPORT AbstractShaderProgram {
          */
         virtual ~AbstractShaderProgram() = 0;
 
+        /** @brief Copying is not allowed */
+        AbstractShaderProgram& operator=(const AbstractShaderProgram&) = delete;
+
+        /** @brief Move assignment */
+        AbstractShaderProgram& operator=(AbstractShaderProgram&& other) noexcept;
+
         /** @brief OpenGL program ID */
         GLuint id() const { return _id; }