librustc: Always parse `macro!()`/`macro![]` as expressions if not

followed by a semicolon.

This allows code like `vec![1i, 2, 3].len();` to work.

This breaks code that uses macros as statements without putting
semicolons after them, such as:

    fn main() {
        ...
        assert!(a == b)
        assert!(c == d)
        println(...);
    }

It also breaks code that uses macros as items without semicolons:

    local_data_key!(foo)

    fn main() {
        println("hello world")
    }

Add semicolons to fix this code. Those two examples can be fixed as
follows:

    fn main() {
        ...
        assert!(a == b);
        assert!(c == d);
        println(...);
    }

    local_data_key!(foo);

    fn main() {
        println("hello world")
    }

RFC #378.

Closes #18635.

[breaking-change]

1 files changed, 13 insertions, 13 deletions

diff --git a/src/test/compile-fail/recursion_limit.rs b/src/test/compile-fail/recursion_limit.rs
index 1da7f47677a..de0d5c90fdd 100644
--- a/src/test/compile-fail/recursion_limit.rs
+++ b/src/test/compile-fail/recursion_limit.rs
@@ -22,19 +22,19 @@ macro_rules! link {
     }
 }
 
-link!(A,B)
-link!(B,C)
-link!(C,D)
-link!(D,E)
-link!(E,F)
-link!(F,G)
-link!(G,H)
-link!(H,I)
-link!(I,J)
-link!(J,K)
-link!(K,L)
-link!(L,M)
-link!(M,N)
+link! { A, B }
+link! { B, C }
+link! { C, D }
+link! { D, E }
+link! { E, F }
+link! { F, G }
+link! { G, H }
+link! { H, I }
+link! { I, J }
+link! { J, K }
+link! { K, L }
+link! { L, M }
+link! { M, N }
 
 enum N { N(uint) }