Auto merge of #28857 - nrc:lowering, r=nikomatsakis

r? @nikomatsakis

src/test/compile-fail/for-loop-refutable-pattern-error-message.rs

@@ -9,7 +9,5 @@
 // except according to those terms.
 
 fn main() {
-    for
-        &1 //~ ERROR refutable pattern in `for` loop binding
-        in [1].iter() {}
+    for &1 in [1].iter() {} //~ ERROR refutable pattern in `for` loop binding
 }

src/test/compile-fail/issue-15167.rs

@@ -16,4 +16,17 @@ fn main() -> (){
     for n in 0..1 {
         println!("{}", f!()); //~ ERROR unresolved name `n`
     }
+
+    if let Some(n) = None {
+        println!("{}", f!()); //~ ERROR unresolved name `n`
+    }
+
+    if false {
+    } else if let Some(n) = None {
+        println!("{}", f!()); //~ ERROR unresolved name `n`
+    }
+
+    while let Some(n) = None {
+        println!("{}", f!()); //~ ERROR unresolved name `n`
+    }
 }

src/test/compile-fail/issue-15381.rs

@@ -13,10 +13,8 @@
 fn main() {
     let values: Vec<u8> = vec![1,2,3,4,5,6,7,8];
 
-    for
-        [x,y,z]
-//~^ ERROR refutable pattern in `for` loop binding: `[]` not covered
-        in values.chunks(3).filter(|&xs| xs.len() == 3) {
+    for [x,y,z] in values.chunks(3).filter(|&xs| xs.len() == 3) {
+        //~^ ERROR refutable pattern in `for` loop binding: `[]` not covered
         println!("y={}", y);
     }
 }

src/test/compile-fail/placement-expr-unsafe.rs

@@ -8,11 +8,17 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// Test that we get an expansion stack for `for` loops.
+// Check that placement in respects unsafe code checks.
 
-// error-pattern:in this expansion of for loop expansion
+#![feature(box_heap)]
+#![feature(placement_in_syntax)]
 
 fn main() {
-    for t in &foo {
-    }
+    use std::boxed::HEAP;
+
+    let p: *const i32 = &42;
+    let _ = in HEAP { *p }; //~ ERROR requires unsafe
+
+    let p: *const _ = &HEAP;
+    let _ = in *p { 42 }; //~ ERROR requires unsafe
 }

src/test/compile-fail/placement-expr-unstable.rs

@@ -0,0 +1,27 @@
+// Copyright 2015 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.
+
+// Check that placement in respects unstable code checks.
+
+#![feature(placement_in_syntax)]
+#![feature(core)]
+
+extern crate core;
+
+fn main() {
+    use std::boxed::HEAP; //~ ERROR use of unstable library feature
+
+    let _ = in HEAP { //~ ERROR use of unstable library feature
+        ::core::raw::Slice { //~ ERROR use of unstable library feature
+            data: &42, //~ ERROR use of unstable library feature
+            len: 1 //~ ERROR use of unstable library feature
+        }
+    };
+}

src/test/run-make/execution-engine/test.rs

@@ -31,7 +31,7 @@ use rustc::middle::ty;
 use rustc::session::config::{self, basic_options, build_configuration, Input, Options};
 use rustc::session::build_session;
 use rustc_driver::driver;
-use rustc_front::lowering::lower_crate;
+use rustc_front::lowering::{lower_crate, LoweringContext};
 use rustc_resolve::MakeGlobMap;
 use libc::c_void;
 
@@ -223,12 +223,13 @@ fn compile_program(input: &str, sysroot: PathBuf)
             .expect("phase_2 returned `None`");
 
         let krate = driver::assign_node_ids(&sess, krate);
-        let mut hir_forest = ast_map::Forest::new(lower_crate(&krate));
+        let lcx = LoweringContext::new(&sess, Some(&krate));
+        let mut hir_forest = ast_map::Forest::new(lower_crate(&lcx, &krate));
         let arenas = ty::CtxtArenas::new();
         let ast_map = driver::make_map(&sess, &mut hir_forest);
 
         driver::phase_3_run_analysis_passes(
-            sess, ast_map, &arenas, id, MakeGlobMap::No, |tcx, analysis| {
+            &sess, ast_map, &arenas, id, MakeGlobMap::No, |tcx, analysis| {
 
             let trans = driver::phase_4_translate_to_llvm(tcx, analysis);
 
@@ -246,7 +247,7 @@ fn compile_program(input: &str, sysroot: PathBuf)
             let modp = llmod as usize;
 
             (modp, deps)
-        }).1
+        })
     }).unwrap();
 
     match handle.join() {

src/test/run-make/save-analysis/foo.rs

@@ -339,8 +339,27 @@ fn main() { // foo
     if let SomeEnum::Strings(..) = s7 {
         println!("hello!");
     }
+
+    for i in 0..5 {
+        foo_foo(i);
+    }
+
+    if let Some(x) = None {
+        foo_foo(x);
+    }
+
+    if false {
+    } else if let Some(y) = None {
+        foo_foo(y);
+    }
+
+    while let Some(z) = None {
+        foo_foo(z);
+    }
 }
 
+fn foo_foo(_: i32) {}
+
 impl Iterator for nofields {
     type Item = (usize, usize);