diff --git a/src/test/compile-fail/borrowck-loan-vec-content.rs b/src/test/compile-fail/borrowck-loan-vec-content.rs new file mode 100644 index 00000000000..053f138bc99 --- /dev/null +++ b/src/test/compile-fail/borrowck-loan-vec-content.rs @@ -0,0 +1,36 @@ +// compile-flags:--borrowck=err + +// Here we check that it is allowed to lend out an element of a +// (locally rooted) mutable, unique vector, and that we then prevent +// modifications to the contents. + +fn takes_imm_elt(_v: &int, f: fn()) { + f(); +} + +fn has_mut_vec_and_does_not_try_to_change_it() { + let v = [mut 1, 2, 3]; + takes_imm_elt(&v[0]) {|| + } +} + +fn has_mut_vec_but_tries_to_change_it() { + let v = [mut 1, 2, 3]; + takes_imm_elt(&v[0]) {|| //! NOTE loan of mutable vec content granted here + v[1] = 4; //! ERROR assigning to mutable vec content prohibited due to outstanding loan + } +} + +fn takes_const_elt(_v: &const int, f: fn()) { + f(); +} + +fn has_mut_vec_and_tries_to_change_it() { + let v = [mut 1, 2, 3]; + takes_const_elt(&const v[0]) {|| + v[1] = 4; + } +} + +fn main() { +} \ No newline at end of file