You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mbe.rs
    path of file: ./repos/rust-analyzer/crates/hir-def/src/macro_expansion_tests
    
    the code of the file until where you have to start completion: //! Tests specific to declarative macros, aka macros by example. This covers
//! both stable `macro_rules!` macros as well as unstable `macro` macros.

mod matching;
mod meta_syntax;
mod metavar_expr;
mod regression;
mod tt_conversion;

use expe
    
fn token_mapping_floats() {
    // Regression test for https://github.com/rust-lang/rust-analyzer/issues/12216
    // (and related issues)
    check(
        r#"
// +spans+syntaxctxt
macro_rules! f {
    ($($tt:tt)*) => {
        $($tt)*
    };
}

// +spans+syntaxctxt
f! {
    fn main() {
        1;
        1.0;
        ((1,),).0.0;
        let x = 1;
    }
}


"#,
        expect![[r#"
// +spans+syntaxctxt
macro_rules! f {
    ($($tt:tt)*) => {
        $($tt)*
    };
}

fn#0:2@30..32#0# main#0:2@33..37#0#(#0:2@37..38#0#)#0:2@38..39#0# {#0:2@40..41#0#
    1#0:2@50..51#0#;#0:2@51..52#0#
    1.0#0:2@61..64#0#;#0:2@64..65#0#
    (#0:2@74..75#0#(#0:2@75..76#0#1#0:2@76..77#0#,#0:2@77..78#0# )#0:2@78..79#0#,#0:2@79..80#0# )#0:2@80..81#0#.#0:2@81..82#0#0#0:2@82..85#0#.#0:2@82..85#0#0#0:2@82..85#0#;#0:2@85..86#0#
    let#0:2@95..98#0# x#0:2@99..100#0# =#0:2@101..102#0# 1#0:2@103..104#0#;#0:2@104..105#0#
}#0:2@110..111#0#


"#]],
    );
}