Fix of #862 where enums declarations where not regenerated. Updated @pool implementation.

test/unit/stdlib/mem/temp_mem.c3

@@ -0,0 +1,68 @@
+module test;
+
+fn String add(String s, Allocator* a, int x)
+{
+    if (x < 0) return s.copy(a);
+    String tmp;
+    @pool(a)
+    {
+        tmp = "foo".tconcat(s);
+        tmp = add(tmp, a, x - 1);
+    };
+    ulong* y = malloc(ulong, .using = mem::temp());
+    *y = 0xAAAA_AAAA_AAAA_AAAA;
+    return tmp.concat("a", .using = a);
+}
+
+fn String breakit(String s, Allocator* a)
+{
+    @pool(a)
+    {
+        return inner2("foo".concat(s, mem::temp()), a);
+    };
+}
+
+fn String inner2(String s, Allocator* a)
+{
+    @pool(a)
+    {
+        ulong* z1 = tmalloc(ulong);
+        *z1 = 0xAAAA_AAAA_AAAA_AAAA;
+        String y = inner3(s, a);
+        ulong* z = tmalloc(ulong);
+        *z = 0xAAAA_AAAA_AAAA_AAAA;
+        return y;
+    };
+}
+
+fn String inner3(String s, Allocator* a)
+{
+    @pool(a)
+    {
+        ulong* z1 = tmalloc(ulong);
+        *z1 = 0xAAAA_AAAA_AAAA_AAAA;
+        String y = inner4(s, a);
+        ulong* z = tmalloc(ulong);
+        *z = 0xAAAA_AAAA_AAAA_AAAA;
+        return y;
+    };
+}
+
+fn String inner4(String s, Allocator* a)
+{
+    @pool(a)
+    {
+        String y = s.concat("xy**********", mem::temp()).copy(a);
+        return y;
+    };
+}
+
+fn void! test_temp_allocator() @test
+{
+    assert("foofoofoofoofoofooabcaaaaaa" == add("abc", mem::temp(), 5), "was %s", add("abc", mem::temp(), 5));
+}
+
+fn void! test_temp_allocator2() @test
+{
+    assert("fooxyz0123456789xy**********" == breakit("xyz0123456789", mem::temp()));
+}