Add a repr(packed(N)) test

Cargo.toml

@@ -15,7 +15,7 @@ Automated tests of FFI bindings.
 """
 
 [dependencies]
-syntex_syntax = "0.59.1"
+syntex_syntax2 = "0.0.1"
 cc = "1.0.1"
 rustc_version = "0.2"
 

src/lib.rs

@@ -12,7 +12,7 @@
 #![deny(missing_docs)]
 
 extern crate cc;
-extern crate syntex_syntax as syntax;
+extern crate syntex_syntax2 as syntax;
 
 extern crate rustc_version;
 
@@ -2052,7 +2052,7 @@ impl<'a, 'v> Visitor<'v> for Generator<'a> {
                 let is_c = i.attrs.iter().any(|a| {
                     attr::find_repr_attrs(self.sh, a)
                         .iter()
-                        .any(|a| *a == ReprAttr::ReprExtern)
+                        .any(|a| *a == ReprAttr::ReprExtern /*|| *a == ReprAttr::ReprTransparent*/)
                 });
                 if !is_c && !(self.opts.skip_struct)(&i.ident.to_string()) {
                     panic!("{} is not marked #[repr(C)]", i.ident);

testcrate/src/t1.c

@@ -25,7 +25,6 @@ unsigned T1static = 3;
 const uint8_t T1_static_u8 = 42;
 uint8_t T1_static_mut_u8 = 37;
 
-
 uint8_t foo(uint8_t a, uint8_t b) { return a + b; }
 void bar(uint8_t a) { return; }
 void baz(void) { return; }

testcrate/src/t1.h

@@ -130,6 +130,15 @@ struct Pack {
 
 # pragma pack(pop)
 
+# pragma pack(push,2)
+
+struct Pack2 {
+  uint8_t a;
+  uint32_t b;
+};
+
+# pragma pack(pop)
+
 // volatile pointers in struct fields:
 struct V {
   volatile uint8_t* v;

testcrate/src/t1.rs

@@ -46,6 +46,9 @@ pub struct T1StructWithUnion {
     pub u: T1NoTypedefUnion,
 }
 
+// #[repr(transparent)]
+// pub struct Transparent(i32);
+
 pub type T1TypedefDouble = c_double;
 pub type T1TypedefPtr = *mut c_int;
 pub type T1TypedefStruct = T1Bar;
@@ -156,6 +159,12 @@ pub struct Pack {
     pub b: u16,
 }
 
+#[repr(C, packed(2))]
+pub struct Pack2 {
+    pub a: u8,
+    pub b: u32,
+}
+
 #[repr(C)]
 pub struct V {
     pub v: *mut u8,