Trait proc_utils::ToPretty

pub trait ToPretty {
    // Required method
    fn to_pretty(&self) -> String;
}

Bring this trait into scope for a blanket to_pretty() implementation for all syn-compatible types as well as TokenStream2.

Calling to_pretty on any such objects will result in a pretty-formatted string representation of the (parsed) source code of that item.

Required Methods

fn to_pretty(&self) -> String

Produces a pretty-formatted String (formatted by prettyplease) representation of the underlying token stream.

Can be used on anything that implements ToTokens if ToPretty is brought into scope.

Example

Using to_pretty directly on a TokenStream2:

use proc_utils::ToPretty;

let struct_tokens = quote::quote!(struct MyStruct;);
assert_eq!(struct_tokens.to_pretty(), "struct MyStruct;\n");

Using to_pretty on a syn::ItemStruct:

use proc_utils::ToPretty;

let struct_tokens = quote::quote!(struct MyStruct { field1: usize, field2: u32, field3: bool });
let item_struct = syn::parse2::<syn::ItemStruct>(struct_tokens).unwrap();
assert_eq!(item_struct.to_pretty(),
    "struct MyStruct {\n    \
         field1: usize,\n    \
         field2: u32,\n    \
         field3: bool,\n\
    }\n"
);

Implementors

impl<T: ToTokens> ToPretty for T