New upstream version 1.25.0+dfsg1

[rustc.git] / src / test / compile-fail / borrowck / two-phase-activation-sharing-interference.rs

diff --git a/src/test/compile-fail/borrowck/two-phase-activation-sharing-interference.rs b/src/test/compile-fail/borrowck/two-phase-activation-sharing-interference.rs
index b6f5e17f1f609f2e62cf7055cae5630c03f0f268..709c00ba8464a41590333caa3926b0d92181563d 100644 (file)
--- a/src/test/compile-fail/borrowck/two-phase-activation-sharing-interference.rs
+++ b/src/test/compile-fail/borrowck/two-phase-activation-sharing-interference.rs
@@ -8,9 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// revisions: lxl nll
-//[lxl]compile-flags: -Z borrowck=mir -Z two-phase-borrows
-//[nll]compile-flags: -Z borrowck=mir -Z two-phase-borrows -Z nll
+// ignore-tidy-linelength
+
+// revisions: lxl_beyond nll_beyond nll_target
+
+//[lxl_beyond] compile-flags: -Z borrowck=mir -Z two-phase-borrows -Z two-phase-beyond-autoref
+//[nll_beyond] compile-flags: -Z borrowck=mir -Z two-phase-borrows -Z two-phase-beyond-autoref -Z nll
+//[nll_target] compile-flags: -Z borrowck=mir -Z two-phase-borrows -Z nll
 
 // This is an important corner case pointed out by Niko: one is
 // allowed to initiate a shared borrow during a reservation, but it
@@ -18,6 +22,14 @@
 //
 // FIXME: for clarity, diagnostics for these cases might be better off
 // if they specifically said "cannot activate mutable borrow of `x`"
+//
+// The convention for the listed revisions: "lxl" means lexical
+// lifetimes (which can be easier to reason about). "nll" means
+// non-lexical lifetimes. "nll_target" means the initial conservative
+// two-phase borrows that only applies to autoref-introduced borrows.
+// "nll_beyond" means the generalization of two-phase borrows to all
+// `&mut`-borrows (doing so makes it easier to write code for specific
+// corner cases).
 
 #![allow(dead_code)]
 
@@ -27,6 +39,7 @@ fn ok() {
     let mut x = 3;
     let y = &mut x;
     { let z = &x; read(z); }
+    //[nll_target]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
     *y += 1;
 }
 
@@ -34,9 +47,11 @@ fn not_ok() {
     let mut x = 3;
     let y = &mut x;
     let z = &x;
+    //[nll_target]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
     *y += 1;
-    //[lxl]~^  ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
-    //[nll]~^^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
+    //[lxl_beyond]~^   ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
+    //[nll_beyond]~^^  ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
+    //[nll_target]~^^^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
     read(z);
 }
 
@@ -44,19 +59,21 @@ fn should_be_ok_with_nll() {
     let mut x = 3;
     let y = &mut x;
     let z = &x;
+    //[nll_target]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
     read(z);
     *y += 1;
-    //[lxl]~^  ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
-    // (okay with nll today)
+    //[lxl_beyond]~^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
+    // (okay with (generalized) nll today)
 }
 
 fn should_also_eventually_be_ok_with_nll() {
     let mut x = 3;
     let y = &mut x;
     let _z = &x;
+    //[nll_target]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable
     *y += 1;
-    //[lxl]~^  ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
-    //[nll]~^^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
+    //[lxl_beyond]~^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable
+    // (okay with (generalized) nll today)
 }
 
 fn main() { }