Rollup merge of rust-lang#37940 - michaelwoerister:ich-struct-constru…

…ctors, r=nikomatsakis

ICH: Add test case for struct constructor expressions.

r? @nikomatsakis

src/test/incremental/hashes/struct_constructors.rs

@@ -0,0 +1,254 @@
+// 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 struct constructor expressions.
+
+// 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"]
+
+
+struct RegularStruct {
+    x: i32,
+    y: i64,
+    z: i16,
+}
+
+// Change field value (regular struct) -----------------------------------------
+#[cfg(cfail1)]
+fn change_field_value_regular_struct() -> RegularStruct {
+    RegularStruct {
+        x: 0,
+        y: 1,
+        z: 2,
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_field_value_regular_struct() -> RegularStruct {
+    RegularStruct {
+        x: 0,
+        y: 2,
+        z: 2,
+    }
+}
+
+
+
+// Change field order (regular struct) -----------------------------------------
+#[cfg(cfail1)]
+fn change_field_order_regular_struct() -> RegularStruct {
+    RegularStruct {
+        x: 3,
+        y: 4,
+        z: 5,
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_field_order_regular_struct() -> RegularStruct {
+    RegularStruct {
+        y: 4,
+        x: 3,
+        z: 5,
+    }
+}
+
+
+
+// Add field (regular struct) --------------------------------------------------
+#[cfg(cfail1)]
+fn add_field_regular_struct() -> RegularStruct {
+    let struct1 = RegularStruct {
+        x: 3,
+        y: 4,
+        z: 5,
+    };
+
+    RegularStruct {
+        x: 7,
+        .. struct1
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_field_regular_struct() -> RegularStruct {
+    let struct1 = RegularStruct {
+        x: 3,
+        y: 4,
+        z: 5,
+    };
+
+    RegularStruct {
+        x: 7,
+        y: 8,
+        .. struct1
+    }
+}
+
+
+
+// Change field label (regular struct) -----------------------------------------
+#[cfg(cfail1)]
+fn change_field_label_regular_struct() -> RegularStruct {
+    let struct1 = RegularStruct {
+        x: 3,
+        y: 4,
+        z: 5,
+    };
+
+    RegularStruct {
+        x: 7,
+        y: 9,
+        .. struct1
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_field_label_regular_struct() -> RegularStruct {
+    let struct1 = RegularStruct {
+        x: 3,
+        y: 4,
+        z: 5,
+    };
+
+    RegularStruct {
+        x: 7,
+        z: 9,
+        .. struct1
+    }
+}
+
+
+
+struct RegularStruct2 {
+    x: i8,
+    y: i8,
+    z: i8,
+}
+
+// Change constructor path (regular struct) ------------------------------------
+#[cfg(cfail1)]
+fn change_constructor_path_regular_struct() {
+    let _ = RegularStruct {
+        x: 0,
+        y: 1,
+        z: 2,
+    };
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_constructor_path_regular_struct() {
+    let _ = RegularStruct2 {
+        x: 0,
+        y: 1,
+        z: 2,
+    };
+}
+
+
+
+// Change constructor path indirectly (regular struct) -------------------------
+mod change_constructor_path_indirectly_regular_struct {
+    #[cfg(cfail1)]
+    use super::RegularStruct as Struct;
+    #[cfg(not(cfail1))]
+    use super::RegularStruct2 as Struct;
+
+    fn function() -> Struct {
+        Struct {
+            x: 0,
+            y: 1,
+            z: 2,
+        }
+    }
+}
+
+
+
+struct TupleStruct(i32, i64, i16);
+
+// Change field value (tuple struct) -------------------------------------------
+#[cfg(cfail1)]
+fn change_field_value_tuple_struct() -> TupleStruct {
+    TupleStruct(0, 1, 2)
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_field_value_tuple_struct() -> TupleStruct {
+    TupleStruct(0, 1, 3)
+}
+
+
+
+struct TupleStruct2(u16, u16, u16);
+
+// Change constructor path (tuple struct) --------------------------------------
+#[cfg(cfail1)]
+fn change_constructor_path_tuple_struct() {
+    let _ = TupleStruct(0, 1, 2);
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_constructor_path_tuple_struct() {
+    let _ = TupleStruct2(0, 1, 2);
+}
+
+
+
+// Change constructor path indirectly (tuple struct) ---------------------------
+mod change_constructor_path_indirectly_tuple_struct {
+    #[cfg(cfail1)]
+    use super::TupleStruct as Struct;
+    #[cfg(not(cfail1))]
+    use super::TupleStruct2 as Struct;
+
+    fn function() -> Struct {
+        Struct(0, 1, 2)
+    }
+}