rune_tracing_macros/
lib.rs

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//! <img alt="rune logo" src="https://raw.githubusercontent.com/rune-rs/rune/main/assets/icon.png" />
//! <br>
//! <a href="https://github.com/rune-rs/rune"><img alt="github" src="https://img.shields.io/badge/github-rune--rs/rune-8da0cb?style=for-the-badge&logo=github" height="20"></a>
//! <a href="https://crates.io/crates/rune-tracing-macros"><img alt="crates.io" src="https://img.shields.io/crates/v/rune-tracing-macros.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20"></a>
//! <a href="https://docs.rs/rune-tracing-macros"><img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-rune--tracing--macros-66c2a5?style=for-the-badge&logoColor=white&logo=data:image/svg+xml;base64,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" height="20"></a>
//! <a href="https://discord.gg/v5AeNkT"><img alt="chat on discord" src="https://img.shields.io/discord/558644981137670144.svg?logo=discord&style=flat-square" height="20"></a>
//! <br>
//! Minimum support: Rust <b>1.81+</b>.
//! <br>
//! <br>
//! <a href="https://rune-rs.github.io"><b>Visit the site 🌐</b></a>
//! &mdash;
//! <a href="https://rune-rs.github.io/book/"><b>Read the book 📖</b></a>
//! <br>
//! <br>
//!
//! Macros for tracing the Rune Language, an embeddable dynamic programming language for Rust.
//!
//! <br>
//!
//! ## Usage
//!
//! This is part of the [Rune Language](https://rune-rs.github.io).

#![allow(clippy::manual_map)]

extern crate proc_macro;

mod instrument;

#[proc_macro_attribute]
pub fn instrument_ast(
    attr: proc_macro::TokenStream,
    item: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
    let attr = syn::parse_macro_input!(attr as instrument::Attr);
    let internal_call = syn::parse_macro_input!(item as instrument::Expander);

    internal_call
        .expand(&attr)
        .unwrap_or_else(to_compile_errors)
        .into()
}

fn to_compile_errors<I>(errors: I) -> proc_macro2::TokenStream
where
    I: IntoIterator<Item = syn::Error>,
{
    let compile_errors = errors.into_iter().map(syn::Error::into_compile_error);
    ::quote::quote!(#(#compile_errors)*)
}

/// Passthrough attribute macro.
#[proc_macro_attribute]
#[doc(hidden)]
pub fn passthrough(
    _: proc_macro::TokenStream,
    item: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
    item
}