Rollup merge of rust-lang#38202 - michaelwoerister:closure-ich-test, …

…r=nikomatsakis

Some incr. comp. hash tests

r? @nikomatsakis

src/test/incremental/hashes/closure_expressions.rs

@@ -0,0 +1,144 @@
+// 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
+
+#![allow(warnings)]
+#![feature(rustc_attrs)]
+#![crate_type="rlib"]
+
+
+// Change closure body ---------------------------------------------------------
+#[cfg(cfail1)]
+fn change_closure_body() {
+    let _ = || 1u32;
+}
+
+#[cfg(not(cfail1))]
+#[rustc_clean(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_dirty(label="HirBody", cfg="cfail2")]
+#[rustc_clean(label="HirBody", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_closure_body() {
+    let _ = || 3u32;
+}
+
+
+
+// Add parameter ---------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_parameter() {
+    let x = 0u32;
+    let _ = || x + 1;
+}
+
+#[cfg(not(cfail1))]
+#[rustc_clean(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_dirty(label="HirBody", cfg="cfail2")]
+#[rustc_clean(label="HirBody", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_parameter() {
+    let x = 0u32;
+    let _ = |x: u32| x + 1;
+}
+
+
+
+// Change parameter pattern ----------------------------------------------------
+#[cfg(cfail1)]
+fn change_parameter_pattern() {
+    let _ = |x: &u32| x;
+}
+
+#[cfg(not(cfail1))]
+#[rustc_clean(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_dirty(label="HirBody", cfg="cfail2")]
+#[rustc_clean(label="HirBody", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_parameter_pattern() {
+    let _ = |&x: &u32| x;
+}
+
+
+
+// Add `move` to closure -------------------------------------------------------
+#[cfg(cfail1)]
+fn add_move() {
+    let _ = || 1;
+}
+
+#[cfg(not(cfail1))]
+#[rustc_clean(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_dirty(label="HirBody", cfg="cfail2")]
+#[rustc_clean(label="HirBody", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_move() {
+    let _ = move || 1;
+}
+
+
+
+// Add type ascription to parameter --------------------------------------------
+#[cfg(cfail1)]
+fn add_type_ascription_to_parameter() {
+    let closure = |x| x + 1u32;
+    let _: u32 = closure(1);
+}
+
+#[cfg(not(cfail1))]
+#[rustc_clean(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_dirty(label="HirBody", cfg="cfail2")]
+#[rustc_clean(label="HirBody", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_type_ascription_to_parameter() {
+    let closure = |x: u32| x + 1u32;
+    let _: u32 = closure(1);
+}
+
+
+
+// Change parameter type -------------------------------------------------------
+#[cfg(cfail1)]
+fn change_parameter_type() {
+    let closure = |x: u32| (x as u64) + 1;
+    let _ = closure(1);
+}
+
+#[cfg(not(cfail1))]
+#[rustc_clean(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_dirty(label="HirBody", cfg="cfail2")]
+#[rustc_clean(label="HirBody", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_parameter_type() {
+    let closure = |x: u16| (x as u64) + 1;
+    let _ = closure(1);
+}