@macroforge/mcp-server/docs/custom-macros/ts-macro-derive/parsing-input.md

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## Parsing Input

Use `parse_ts_macro_input!` to convert the token stream:

Rust

```
use macroforge_ts::ts_syn::{Data, DeriveInput, parse_ts_macro_input};

#[ts_macro_derive(MyMacro)]
pub fn my_macro(mut input: TsStream) -> Result<TsStream, MacroforgeError> {
    let input = parse_ts_macro_input!(input as DeriveInput);

    match &input.data {
        Data::Class(class) => {
            let class_name = input.name();
            let fields = class.fields();
            // ...
        }
        Data::Interface(interface) => {
            // Handle interfaces
        }
        Data::Enum(_) => {
            // Handle enums (if supported)
        }
        Data::TypeAlias(_) => {
            // Handle type aliases (if supported)
        }
    }
}
```

When the input cannot be parsed, `parse_ts_macro_input!` returns early with a `MacroforgeError`, so
the function's error type must accept one.