Rollup merge of #37799 - michaelwoerister:ich-type-def-tests, r=nikomatsakis

ICH: Add test case for type alias definitions

r? @nikomatsakis

src/test/incremental/hashes/type_defs.rs

@@ -0,0 +1,249 @@
+// 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 `type` definitions.
+
+// 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.
+
+// We also test the ICH for `type` definitions exported in metadata. Same as
+// above, we want to make sure that the change between rev1 and rev2 also
+// results in a change of the ICH for the enum's metadata, and that it stays
+// the same between rev2 and rev3.
+
+// must-compile-successfully
+// revisions: cfail1 cfail2 cfail3
+// compile-flags: -Z query-dep-graph
+
+#![allow(warnings)]
+#![feature(rustc_attrs)]
+#![crate_type="rlib"]
+
+
+// Change type (primitive) -----------------------------------------------------
+#[cfg(cfail1)]
+type ChangePrimitiveType = i32;
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangePrimitiveType = i64;
+
+
+
+// Change mutability -----------------------------------------------------------
+#[cfg(cfail1)]
+type ChangeMutability = &'static i32;
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangeMutability = &'static mut i32;
+
+
+
+// Change mutability -----------------------------------------------------------
+#[cfg(cfail1)]
+type ChangeLifetime<'a> = (&'static i32, &'a i32);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangeLifetime<'a> = (&'a i32, &'a i32);
+
+
+
+// Change type (struct) -----------------------------------------------------------
+struct Struct1;
+struct Struct2;
+
+#[cfg(cfail1)]
+type ChangeTypeStruct = Struct1;
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangeTypeStruct = Struct2;
+
+
+
+// Change type (tuple) ---------------------------------------------------------
+#[cfg(cfail1)]
+type ChangeTypeTuple = (u32, u64);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangeTypeTuple = (u32, i64);
+
+
+
+// Change type (enum) ----------------------------------------------------------
+enum Enum1 {
+    Var1,
+    Var2,
+}
+enum Enum2 {
+    Var1,
+    Var2,
+}
+
+#[cfg(cfail1)]
+type ChangeTypeEnum = Enum1;
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangeTypeEnum = Enum2;
+
+
+
+// Add tuple field -------------------------------------------------------------
+#[cfg(cfail1)]
+type AddTupleField = (i32, i64);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddTupleField = (i32, i64, i16);
+
+
+
+// Change nested tuple field ---------------------------------------------------
+#[cfg(cfail1)]
+type ChangeNestedTupleField = (i32, (i64, i16));
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type ChangeNestedTupleField = (i32, (i64, i8));
+
+
+
+// Add type param --------------------------------------------------------------
+#[cfg(cfail1)]
+type AddTypeParam<T1> = (T1, T1);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddTypeParam<T1, T2> = (T1, T2);
+
+
+
+// Add type param bound --------------------------------------------------------
+#[cfg(cfail1)]
+type AddTypeParamBound<T1> = (T1, u32);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddTypeParamBound<T1: Clone> = (T1, u32);
+
+
+
+// Add type param bound in where clause ----------------------------------------
+#[cfg(cfail1)]
+type AddTypeParamBoundWhereClause<T1> where T1: Clone = (T1, u32);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddTypeParamBoundWhereClause<T1> where T1: Clone+Copy = (T1, u32);
+
+
+
+// Add lifetime param ----------------------------------------------------------
+#[cfg(cfail1)]
+type AddLifetimeParam<'a> = (&'a u32, &'a u32);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddLifetimeParam<'a, 'b> = (&'a u32, &'b u32);
+
+
+
+// Add lifetime param bound ----------------------------------------------------
+#[cfg(cfail1)]
+type AddLifetimeParamBound<'a, 'b> = (&'a u32, &'b u32);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddLifetimeParamBound<'a, 'b: 'a> = (&'a u32, &'b u32);
+
+
+
+// Add lifetime param bound in where clause ------------------------------------
+#[cfg(cfail1)]
+type AddLifetimeParamBoundWhereClause<'a, 'b, 'c>
+where 'b: 'a
+    = (&'a u32, &'b u32, &'c u32);
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_clean(cfg="cfail3")]
+type AddLifetimeParamBoundWhereClause<'a, 'b, 'c>
+where 'b: 'a,
+      'c: 'a
+    = (&'a u32, &'b u32, &'c u32);
+
+
+
+// Change Trait Bound Indirectly -----------------------------------------------
+trait ReferencedTrait1 {}
+trait ReferencedTrait2 {}
+
+mod change_trait_bound_indirectly {
+    #[cfg(cfail1)]
+    use super::ReferencedTrait1 as Trait;
+    #[cfg(not(cfail1))]
+    use super::ReferencedTrait2 as Trait;
+
+    #[rustc_dirty(label="Hir", cfg="cfail2")]
+    #[rustc_clean(label="Hir", cfg="cfail3")]
+    #[rustc_metadata_dirty(cfg="cfail2")]
+    #[rustc_metadata_clean(cfg="cfail3")]
+    type ChangeTraitBoundIndirectly<T: Trait> = (T, u32);
+}
+
+
+
+// Change Trait Bound Indirectly In Where Clause -------------------------------
+mod change_trait_bound_indirectly_in_where_clause {
+    #[cfg(cfail1)]
+    use super::ReferencedTrait1 as Trait;
+    #[cfg(not(cfail1))]
+    use super::ReferencedTrait2 as Trait;
+
+    #[rustc_dirty(label="Hir", cfg="cfail2")]
+    #[rustc_clean(label="Hir", cfg="cfail3")]
+    #[rustc_metadata_dirty(cfg="cfail2")]
+    #[rustc_metadata_clean(cfg="cfail3")]
+    type ChangeTraitBoundIndirectly<T> where T : Trait = (T, u32);
+}