Method call

crates/c-api/include/wasmtime/func.hh:241–268

template <typename I>
inline TrapResult<std::vector<Val>>
Func::call(Store::Context cx, const I &begin, const I &end) const {
  std::vector<wasmtime_val_t> raw_params;
  raw_params.reserve(end - begin);
  for (auto i = begin; i != end; i++) {
    raw_params.push_back(i->val);
  }
  size_t nresults = this->type(cx)->results().size();
  std::vector<wasmtime_val_t> raw_results(nresults);

  wasm_trap_t *trap = nullptr;
  auto *error =
      wasmtime_func_call(cx.ptr, &func, raw_params.data(), raw_params.size(),
                         raw_results.data(), raw_results.capacity(), &trap);
  if (error != nullptr) {
    return TrapError(Error(error));
  }
  if (trap != nullptr) {
    return TrapError(Trap(trap));
  }

  std::vector<Val> results;
  results.reserve(nresults);
  for (size_t i = 0; i < nresults; i++) {
    results.push_back(raw_results[i]);
  }
  return results;
}

inline TrapResult<std::vector<Val>>
Func::call(Store::Context cx, const std::initializer_list<Val> &params) const {