macro_loop 0.4.3

A macro for writing repetitive Rust code using loops, conditionals, and bindings
Documentation 
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use derive_syn_parse::Parse;
use proc_macro2::TokenStream;
use quote::ToTokens;
use syn::token::Paren;

use super::*;

#[derive(Parse)]
pub struct FragExpr {
    #[paren]
    _parens: Paren,
    #[inside(_parens)]
    expr: Expr,
}

impl ApplyFragment for FragExpr {
    fn apply<'s: 'v, 'v>(
        &'s self,
        namespace: &mut Namespace<'v, 'v>,
        tokens: &mut TokenStream,
    ) -> syn::Result<()> {
        let value = Value::from_expr(&self.expr, &namespace)?;

        value.to_tokens(tokens);

        Ok(())
    }
}