Some basic acceptance tests for better SVH.

src/test/auxiliary/svh-a-base.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:U>(_: int) -> int {
+    3
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-change-lit.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:U>(_: int) -> int {
+    0
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-change-significant-cfg.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+#[cfg(some_flag)]
+pub fn foo<T:U>(_: int) -> int {
+    3
+}
+
+#[cfg(not(some_flag))]
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-change-trait-bound.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:V>(_: int) -> int {
+    3
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-comment.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:U>(_: int) -> int {
+    // a comment does not affect the svh
+    3
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-doc.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+// Adding some documentation does not affect the svh.
+
+/// foo always returns three.
+pub fn foo<T:U>(_: int) -> int {
+    3
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-macro.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:U>(_: int) -> int {
+    // a macro invocation in a function body does not affect the svh,
+    // as long as it yields the same code.
+    three!()
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-no-change.rs

@@ -0,0 +1,37 @@
+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:U>(_: int) -> int {
+    3
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-redundant-cfg.rs

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+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+// cfg attribute does not affect the svh, as long as it yields the same code.
+#[cfg(not(an_unused_name))]
+pub fn foo<T:U>(_: int) -> int {
+    3
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-a-whitespace.rs

@@ -0,0 +1,39 @@
+// Copyright 2014 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.
+
+//! The `svh-a-*.rs` files are all deviations from the base file
+//! svh-a-base.rs with some difference (usually in `fn foo`) that
+//! should not affect the strict version hash (SVH) computation
+//! (#14132).
+
+#![feature(macro_rules)]
+
+#![crate_id = "a"]
+
+macro_rules! three {
+    () => { 3 }
+}
+
+pub trait U {}
+pub trait V {}
+impl U for () {}
+impl V for () {}
+
+static A_CONSTANT : int = 2;
+
+pub fn foo<T:U>(_: int) -> int {
+
+    3
+
+}
+
+pub fn an_unused_name() -> int {
+    4
+}

src/test/auxiliary/svh-b.rs

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+// Copyright 2014 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 is a client of the `a` crate defined in "svn-a-base.rs".  The
+//! rpass and cfail tests (such as "run-pass/svh-add-comment.rs") use
+//! it by swapping in a different object code library crate built from
+//! some variant of "svn-a-base.rs", and then we are checking if the
+//! compiler properly ignores or accepts the change, based on whether
+//! the change could affect the downstream crate content or not
+//! (#14132).
+
+#![crate_id = "b"]
+
+extern crate a;
+
+pub fn foo() { assert_eq!(a::foo::<()>(0), 3); }

src/test/compile-fail/svh-change-lit.rs

@@ -0,0 +1,24 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-change-lit.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b; //~ ERROR: found possibly newer version of crate `a` which `b` depends on
+//~^ NOTE: perhaps this crate needs to be recompiled
+
+fn main() {
+    b::foo()
+}

src/test/compile-fail/svh-change-significant-cfg.rs

@@ -0,0 +1,24 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-change-significant-cfg.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b; //~ ERROR: found possibly newer version of crate `a` which `b` depends on
+//~^ NOTE: perhaps this crate needs to be recompiled
+
+fn main() {
+    b::foo()
+}

src/test/compile-fail/svh-change-trait-bound.rs

@@ -0,0 +1,24 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-change-trait-bound.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b; //~ ERROR: found possibly newer version of crate `a` which `b` depends on
+//~^ NOTE: perhaps this crate needs to be recompiled
+
+fn main() {
+    b::foo()
+}

src/test/run-pass/svh-add-comment.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-comment.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b;
+
+fn main() {
+    b::foo()
+}

src/test/run-pass/svh-add-doc.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-doc.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b;
+
+fn main() {
+    b::foo()
+}

src/test/run-pass/svh-add-macro.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-macro.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b;
+
+fn main() {
+    b::foo()
+}

src/test/run-pass/svh-add-nothing.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-no-change.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b;
+
+fn main() {
+    b::foo()
+}

src/test/run-pass/svh-add-redundant-cfg.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-redundant-cfg.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b;
+
+fn main() {
+    b::foo()
+}

src/test/run-pass/svh-add-whitespace.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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.
+
+// note that these aux-build directives must be in this order
+// aux-build:svh-a-base.rs
+// aux-build:svh-b.rs
+// aux-build:svh-a-whitespace.rs
+
+#![feature(macro_rules)]
+
+extern crate a;
+extern crate b;
+
+fn main() {
+    b::foo()
+}