rust/src/test/codegen-units/item-collection/non-generic-closures.rs

// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// In the current version of the collector that still has to support
// legacy-trans, closures do not generate their own TransItems, so we are
// ignoring this test until MIR trans has taken over completely
// ignore-test

// ignore-tidy-linelength
// compile-flags:-Zprint-trans-items=eager

#![deny(dead_code)]
#![feature(start)]

//~ TRANS_ITEM fn non_generic_closures::temporary[0]
fn temporary() {
    //~ TRANS_ITEM fn non_generic_closures::temporary[0]::{{closure}}[0]
    (|a: u32| {
        let _ = a;
    })(4);
}

//~ TRANS_ITEM fn non_generic_closures::assigned_to_variable_but_not_executed[0]
fn assigned_to_variable_but_not_executed() {
    //~ TRANS_ITEM fn non_generic_closures::assigned_to_variable_but_not_executed[0]::{{closure}}[0]
    let _x = |a: i16| {
        let _ = a + 1;
    };
}

//~ TRANS_ITEM fn non_generic_closures::assigned_to_variable_executed_directly[0]
fn assigned_to_variable_executed_indirectly() {
    //~ TRANS_ITEM fn non_generic_closures::assigned_to_variable_executed_directly[0]::{{closure}}[0]
    let f = |a: i32| {
        let _ = a + 2;
    };
    run_closure(&f);
}

//~ TRANS_ITEM fn non_generic_closures::assigned_to_variable_executed_indirectly[0]
fn assigned_to_variable_executed_directly() {
    //~ TRANS_ITEM fn non_generic_closures::assigned_to_variable_executed_indirectly[0]::{{closure}}[0]
    let f = |a: i64| {
        let _ = a + 3;
    };
    f(4);
}

//~ TRANS_ITEM fn non_generic_closures::start[0]
#[start]
fn start(_: isize, _: *const *const u8) -> isize {
    temporary();
    assigned_to_variable_but_not_executed();
    assigned_to_variable_executed_directly();
    assigned_to_variable_executed_indirectly();

    0
}

//~ TRANS_ITEM fn non_generic_closures::run_closure[0]
fn run_closure(f: &Fn(i32)) {
    f(3);
}