flutter_rust_bridge_macros 2.8.0

Supporting procedural macros for flutter_rust_bridge
Documentation 
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//! Main documentation is in https://github.com/fzyzcjy/flutter_rust_bridge

mod components;

use crate::components::converter::convert_frb_attr_to_encoded_form;
use crate::components::encoder::create_frb_encoded_comment;
use crate::components::{attr_external, attr_ui_state};
use proc_macro::TokenStream;

/// Attribute to guide code generation.
///
/// For what it can do, please refer to <https://github.com/fzyzcjy/flutter_rust_bridge>.
// This is surely executed - otherwise how can one use any `#[frb]` macro
// but coverage tool does not think so, possibly because it is done in build time
// frb-coverage:ignore-start
#[proc_macro_attribute]
pub fn frb(attribute: TokenStream, item: TokenStream) -> TokenStream {
    let attribute_encoded = create_frb_encoded_comment(&format!("#[frb({attribute})]"));
    let attribute_str = attribute.to_string();
    let attribute_proc_macro2: proc_macro2::TokenStream = attribute.into();

    let item_converted = match attribute_str.as_ref() {
        ATTR_KEYWORD_EXTERNAL => attr_external::handle(attribute_proc_macro2.clone(), item.into()),
        ATTR_KEYWORD_UI_STATE => attr_ui_state::handle(item).into(),
        _ => item.into(),
    };
    let item_converted = convert_frb_attr_to_encoded_form(item_converted);

    (quote::quote! {
        #attribute_encoded
        #item_converted
    })
    .into()
}
// frb-coverage:ignore-end

const ATTR_KEYWORD_EXTERNAL: &str = "external";
const ATTR_KEYWORD_UI_STATE: &str = "ui_state";