# Generated methods (llmcpp)

**Generated methods** implement prose requests within a real C++ class interface. The inventory example asks for a state transition with an explicit failure case:

```cpp
__llm__ bool Inventory::reserve(unsigned count)
{
    If enough stock is available, move count units from available to reserved
    and return true. Otherwise leave the inventory unchanged and return false.
}
```

`Inventory` declares private `m_available` and `m_reserved` fields. Because this is a member function, compiler context lets the agent inspect and use that state under normal access rules.

The return type and `count` parameter remain C++. Only the statements are generated. Candidate compilation checks access and types; behavioral tests should check that a failed reservation leaves both counters unchanged. This distinction matters because code can compile while breaking the requested state invariant.

Source: [07_inventory.cpp](https://github.com/yanevskiv/llmcpp/blob/main/examples/07_inventory.cpp).