Add support for LOAD_BUILD_CLASS op-code

Issue #39

ASTNode.h

@@ -17,7 +17,7 @@ public:
         NODE_COMPREHENSION,
 
         // Empty nodes
-        NODE_PASS, NODE_LOCALS
+        NODE_PASS, NODE_LOCALS, NODE_LOADBUILDCLASS
     };
 
     ASTNode(int type = NODE_INVALID) : m_refs(0), m_type(type) { }
@@ -541,4 +541,16 @@ private:
 
 };
 
+
+class ASTLoadBuildClass : public ASTNode {
+public:
+    ASTLoadBuildClass(PycRef<PycObject> obj)
+        : ASTNode(NODE_LOADBUILDCLASS), m_obj(obj) { }
+
+    PycRef<PycObject> object() const { return m_obj; }
+
+private:
+    PycRef<PycObject> m_obj;
+};
+
 #endif

ASTree.cpp

@@ -367,6 +367,43 @@ PycRef<ASTNode> BuildFromCode(PycRef<PycCode> code, PycModule* mod)
                 int pparams = (operand & 0xFF);
                 ASTCall::kwparam_t kwparamList;
                 ASTCall::pparam_t pparamList;
+
+                /* Test for the load build class function */
+                stack_hist.push(stack);
+                int basecnt = 0;
+                ASTTuple::value_t bases;
+                bases.resize(basecnt);
+                PycRef<ASTNode> TOS = stack.top();
+                int TOS_type = TOS->type();
+                // bases are NODE_NAME at TOS
+                while (TOS_type == ASTNode::NODE_NAME) {
+                    bases.resize(basecnt + 1);
+                    bases[basecnt] = TOS;
+                    basecnt++;
+                    stack.pop();
+                    TOS = stack.top();
+                    TOS_type = TOS->type();
+                }
+                // qualified name is PycString at TOS
+                PycRef<ASTNode> name = stack.top();
+                stack.pop();
+                PycRef<ASTNode> function = stack.top();
+                stack.pop();
+                PycRef<ASTNode> loadbuild = stack.top();
+                stack.pop();
+                int loadbuild_type = loadbuild->type();
+                if (loadbuild_type == ASTNode::NODE_LOADBUILDCLASS) {
+                    PycRef<ASTNode> call = new ASTCall(function, pparamList, kwparamList);
+                    stack.push(new ASTClass(call, new ASTTuple(bases), name));
+                    stack_hist.pop();
+                    break;
+                }
+                else
+                {
+                    stack = stack_hist.top();
+                    stack_hist.pop();
+                }
+
                 for (int i=0; i<kwparams; i++) {
                     PycRef<ASTNode> val = stack.top();
                     stack.pop();
@@ -2021,6 +2058,11 @@ PycRef<ASTNode> BuildFromCode(PycRef<PycCode> code, PycModule* mod)
                 curblock->append(new ASTReturn(value, ASTReturn::YIELD));
             }
             break;
+        case Pyc::LOAD_BUILD_CLASS:
+            {
+                stack.push(new ASTLoadBuildClass(new PycObject()));
+            }
+            break;
         default:
             fprintf(stderr, "Unsupported opcode: %s\n", Pyc::OpcodeName(opcode & 0xFF));
             cleanBuild = false;