OpCopyObject and struct fix

Structs are allowed to have 0 members. Useless, but legal and therefore
must be allowable.

Implement OpCopyObject.

Increment the version.

Author: mmoult

src/main.cpp

@@ -21,7 +21,7 @@
 #include "values/raytrace/shader-binding-table.hpp"
 #include "values/value.hpp"
 
-constexpr auto VERSION = "0.9.1";
+constexpr auto VERSION = "0.10.0";
 
 enum ReturnCode : int {
     OK = 0,

src/spv/inst-make.cpp

@@ -1215,6 +1215,14 @@ bool Instruction::makeResult(DataView& data, unsigned location, Instruction::Dec
         data[result_at].redefine(to_ret);
         break;
     }
+    case spv::OpCopyObject: {  // 83
+        const Value* src = getValue(src_at, data);
+        Type* res_type = getType(dst_type_at, data);
+        Value* to_ret = res_type->construct();
+        to_ret->copyFrom(*src);
+        data[result_at].redefine(to_ret);
+        break;
+    }
     case spv::OpTranspose: {  // 84
         Type* res_type = getType(dst_type_at, data);
         Value* to_ret = res_type->construct();

src/spv/inst-read.cpp

@@ -196,6 +196,7 @@ void Instruction::readOp(std::vector<Instruction>& insts, uint16_t opcode, std::
         break;
     case spv::OpTypeSampledImage:  // 27
     case spv::OpTypeRuntimeArray:  // 29
+    case spv::OpCopyObject:  // 83
     case spv::OpTranspose:  // 84
     case spv::OpImage:  // 100
     case spv::OpConvertFToU:  // 109
@@ -311,11 +312,15 @@ void Instruction::readOp(std::vector<Instruction>& insts, uint16_t opcode, std::
         to_load.push_back(Type::REF);
         break;
     case spv::OpTypeStruct:  // 30
+        // "It is valid for the structure to have no members."
     case spv::OpTypeFunction:  // 33
     case spv::OpConstantComposite:  // 44
     case spv::OpSpecConstantComposite:  // 51
-    case spv::OpFunctionCall:  // 57
     case spv::OpCompositeConstruct:  // 80
+        optional.push_back(Type::REF);
+        repeating = Repeat::WHOLE;
+        break;
+    case spv::OpFunctionCall:  // 57
         to_load.push_back(Type::REF);
         optional.push_back(Type::REF);
         repeating = Repeat::WHOLE;