# Source rewriting (llmcpp)

**Source rewriting** replaces an annotated request with accepted C++ statements. In the tool-server fixture, a generated method starts as:

```cpp
__llm__ void Account::deposit(int amount) {
    Add amount to cents.
}
```

The matching mock script submits `cents += amount;`. The resulting method is ordinary C++:

```cpp
void Account::deposit(int amount) {
    cents += amount;
}
```

This simplified result omits generated metadata comments. The declaration remains, while the modifier and prose are replaced. Generation does not rewrite the class interface or add arbitrary includes.

Use `llmc++ --llm` to inspect the full rewritten translation unit. That file can be reviewed and compiled conventionally, without interpreting a prompt when the function is called.

Source: [06_tools.cpp](https://github.com/yanevskiv/llmcpp/blob/main/tests/test_data/06_tools.cpp).