fix: use namespaced valtypes for compat with Extism #715 (#18)

Author: G4Vi

Diff for: example.cpp

@@ -31,7 +31,8 @@ int main(int argc, char *argv[]) {
   };
 
   std::vector<Function> functions = {
-      Function("hello_world", {ValType::I64}, {ValType::I64}, hello_world,
+      Function("hello_world", {ValType::ExtismValType_I64},
+               {ValType::ExtismValType_I64}, hello_world,
                (void *)"Hello again!",
                [](void *x) { std::cout << "Free user data" << std::endl; }),
   };

Diff for: src/current_plugin.cpp

@@ -45,7 +45,7 @@ uint8_t *CurrentPlugin::inputBytes(size_t *length, size_t index) const {
     return nullptr;
   }
   auto inp = this->inputs[index];
-  if (inp.t != ValType::I64) {
+  if (inp.t != ValType::ExtismValType_I64) {
     return nullptr;
   }
   if (length != nullptr) {

Diff for: test/test.cpp

@@ -66,7 +66,7 @@ TEST(Plugin, FunctionExists) {
 
 TEST(Plugin, HostFunction) {
   auto wasm = read("../wasm/code-functions.wasm");
-  auto t = std::vector<ValType>{ValType::I64};
+  auto t = std::vector<ValType>{ValType::ExtismValType_I64};
   Function hello_world =
       Function("hello_world", t, t, [](CurrentPlugin plugin, void *user_data) {
         plugin.output(std::string("test"));
@@ -88,7 +88,7 @@ void callThread(Plugin *plugin) {
 
 TEST(Plugin, MultipleThreads) {
   auto wasm = read("../wasm/code-functions.wasm");
-  auto t = std::vector<ValType>{ValType::I64};
+  auto t = std::vector<ValType>{ValType::ExtismValType_I64};
   Function hello_world =
       Function("hello_world", t, t, [](CurrentPlugin plugin, void *user_data) {
         plugin.output(std::string("testing123"));