closure_expressions.rs

// Copyright 2016 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.


// This test case tests the incremental compilation hash (ICH) implementation
// for closure expression.

// The general pattern followed here is: Change one thing between rev1 and rev2
// and make sure that the hash has changed, then change nothing between rev2 and
// rev3 and make sure that the hash has not changed.

// must-compile-successfully
// revisions: cfail1 cfail2 cfail3
// compile-flags: -Z query-dep-graph -Zincremental-ignore-spans

#![allow(warnings)]
#![feature(rustc_attrs)]
#![crate_type="rlib"]


// Change closure body ---------------------------------------------------------
#[cfg(cfail1)]
pub fn change_closure_body() {
    let _ = || 1u32;
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody")]
#[rustc_clean(cfg="cfail3")]
pub fn change_closure_body() {
    let _ = || 3u32;
}



// Add parameter ---------------------------------------------------------------
#[cfg(cfail1)]
pub fn add_parameter() {
    let x = 0u32;
    let _ = || x + 1;
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, MirValidated, MirOptimized, TypeckTables")]
#[rustc_clean(cfg="cfail3")]
pub fn add_parameter() {
    let x = 0u32;
    let _ = |x: u32| x + 1;
}



// Change parameter pattern ----------------------------------------------------
#[cfg(cfail1)]
pub fn change_parameter_pattern() {
    let _ = |x: &u32| x;
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, MirValidated, TypeckTables")]
#[rustc_clean(cfg="cfail3")]
pub fn change_parameter_pattern() {
    let _ = |&x: &u32| x;
}



// Add `move` to closure -------------------------------------------------------
#[cfg(cfail1)]
pub fn add_move() {
    let _ = || 1;
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody")]
#[rustc_clean(cfg="cfail3")]
pub fn add_move() {
    let _ = move || 1;
}



// Add type ascription to parameter --------------------------------------------
#[cfg(cfail1)]
pub fn add_type_ascription_to_parameter() {
    let closure = |x| x + 1u32;
    let _: u32 = closure(1);
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody")]
#[rustc_clean(cfg="cfail3")]
pub fn add_type_ascription_to_parameter() {
    let closure = |x: u32| x + 1u32;
    let _: u32 = closure(1);
}



// Change parameter type -------------------------------------------------------
#[cfg(cfail1)]
pub fn change_parameter_type() {
    let closure = |x: u32| (x as u64) + 1;
    let _ = closure(1);
}

#[cfg(not(cfail1))]
#[rustc_clean(cfg="cfail2", except="HirBody, MirValidated, MirOptimized, TypeckTables")]
#[rustc_clean(cfg="cfail3")]
pub fn change_parameter_type() {
    let closure = |x: u16| (x as u64) + 1;
    let _ = closure(1);
}