syntax: Add a hack to support the int-template pattern

src/test/run-pass/mod-merge-hack-inst.rs

@@ -0,0 +1,6 @@
+// xfail-test not a test. used by mod-merge-hack.rs
+
+mod inst {
+    pub type T = i32;
+    pub const bits: uint = 32;
+}

src/test/run-pass/mod-merge-hack-template.rs

@@ -0,0 +1,6 @@
+// xfail-test not a test. used by mod-merge-hack.rs
+
+use T = inst::T;
+
+pub const bits: uint = inst::bits;
+pub pure fn min(x: T, y: T) -> T { if x < y { x } else { y } }

src/test/run-pass/mod-merge-hack.rs

@@ -0,0 +1,9 @@
+// xfail-pretty
+#[path = "mod-merge-hack-template.rs"]
+#[merge = "mod-merge-hack-inst.rs"]
+mod myint32;
+
+fn main() {
+    assert myint32::bits == 32;
+    assert myint32::min(10, 20) == 10;
+}