# Debug

The `Debug` macro generates a human-readable `toString()` method for
TypeScript classes, interfaces, enums, and type aliases.

## Generated Output

**Classes**: Generates a standalone function `classNameToString(value)` and a static wrapper
method `static toString(value)` returning a string like `"ClassName { field1: value1, field2: value2 }"`.

**Enums**: Generates a standalone function `enumNameToString(value)` that performs
reverse lookup on numeric enums.

**Interfaces**: Generates a standalone function `ifaceNameToString(value)`.

**Type Aliases**: Generates a standalone function using JSON.stringify for
complex types, or field enumeration for object types.

Names use **camelCase** conversion (e.g., `User` -> `userToString`).


## Field-Level Options

The `@debug` decorator supports:

- `skip` - Exclude the field from debug output
- `rename = "label"` - Use a custom label instead of the field name

## Example

```typescript before
/** @derive(Debug) */
class User {
    /** @debug({ rename: "id" }) */
    userId: number;

    /** @debug({ skip: true }) */
    password: string;

    email: string;
}
```

```typescript after
class User {
    userId: number;

    password: string;

    email: string;

    static toString(value: User): string {
        return userToString(value);
    }
}

export function userToString(value: User): string {
    const parts: string[] = [];
    parts.push('id: ' + value.userId);
    parts.push('email: ' + value.email);
    return 'User { ' + parts.join(', ') + ' }';
}
```