A test to exercise suffix inference for unary minus a little more.

src/test/run-pass/unary-minus-suffix-inference.rs

@@ -0,0 +1,43 @@
+fn main() {
+    let a = 1;
+    let a_neg: i8 = -a;
+    log(error, a_neg);
+
+    let b = 1;
+    let b_neg: i16 = -b;
+    log(error, b_neg);
+
+    let c = 1;
+    let c_neg: i32 = -c;
+    log(error, b_neg);
+
+    let d = 1;
+    let d_neg: i64 = -d;
+    log(error, b_neg);
+
+    let e = 1;
+    let e_neg: int = -e;
+    log(error, b_neg);
+
+    // intentional overflows
+
+    let f = 1;
+    let f_neg: u8 = -f;
+    log(error, f_neg);
+
+    let g = 1;
+    let g_neg: u16 = -g;
+    log(error, g_neg);
+
+    let h = 1;
+    let h_neg: u32 = -h;
+    log(error, h_neg);
+
+    let i = 1;
+    let i_neg: u64 = -i;
+    log(error, i_neg);
+
+    let j = 1;
+    let j_neg: uint = -j;
+    log(error, j_neg);
+}