auto merge of #8927 : thestinger/rust/repr, r=huonw

src/librustc/middle/trans/reflect.rs

@@ -51,6 +51,10 @@ impl Reflector {
         C_int(self.bcx.ccx(), i)
     }
 
+    pub fn c_bool(&mut self, b: bool) -> ValueRef {
+        C_bool(b)
+    }
+
     pub fn c_slice(&mut self, s: @str) -> ValueRef {
         // We're careful to not use first class aggregates here because that
         // will kick us off fast isel. (Issue #4352.)
@@ -146,6 +150,7 @@ impl Reflector {
     // Entrypoint
     pub fn visit_ty(&mut self, t: ty::t) {
         let bcx = self.bcx;
+        let tcx = bcx.ccx().tcx;
         debug!("reflect::visit_ty %s", ty_to_str(bcx.ccx().tcx, t));
 
         match ty::get(t).sty {
@@ -248,17 +253,20 @@ impl Reflector {
           }
 
           ty::ty_struct(did, ref substs) => {
-              let bcx = self.bcx;
-              let tcx = bcx.ccx().tcx;
               let fields = ty::struct_fields(tcx, did, substs);
+              let mut named_fields = false;
+              if !fields.is_empty() {
+                  named_fields = fields[0].ident != special_idents::unnamed_field;
+              }
 
               let extra = ~[self.c_slice(ty_to_str(tcx, t).to_managed()),
+                            self.c_bool(named_fields),
                             self.c_uint(fields.len())] + self.c_size_and_align(t);
               do self.bracketed("class", extra) |this| {
                   for (i, field) in fields.iter().enumerate() {
                       let extra = ~[this.c_uint(i),
-                                    this.c_slice(
-                                        bcx.ccx().sess.str_of(field.ident))]
+                                    this.c_slice(bcx.ccx().sess.str_of(field.ident)),
+                                    this.c_bool(named_fields)]
                           + this.c_mt(&field.mt);
                       this.visit("class_field", extra);
                   }
@@ -270,7 +278,6 @@ impl Reflector {
           // let the visitor tell us if it wants to visit only a particular
           // variant?
           ty::ty_enum(did, ref substs) => {
-            let bcx = self.bcx;
             let ccx = bcx.ccx();
             let repr = adt::represent_type(bcx.ccx(), t);
             let variants = ty::substd_enum_variants(ccx.tcx, did, substs);
@@ -336,8 +343,12 @@ impl Reflector {
             }
           }
 
-          // Miscallaneous extra types
-          ty::ty_trait(_, _, _, _, _) => self.leaf("trait"),
+          ty::ty_trait(_, _, _, _, _) => {
+              let extra = [self.c_slice(ty_to_str(tcx, t).to_managed())];
+              self.visit("trait", extra);
+          }
+
+          // Miscellaneous extra types
           ty::ty_infer(_) => self.leaf("infer"),
           ty::ty_err => self.leaf("err"),
           ty::ty_param(ref p) => {

src/libstd/reflect.rs

@@ -331,25 +331,28 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
         true
     }
 
-    fn visit_enter_class(&mut self, name: &str, n_fields: uint, sz: uint, align: uint) -> bool {
+    fn visit_enter_class(&mut self, name: &str, named_fields: bool, n_fields: uint, sz: uint,
+                         align: uint) -> bool {
         self.align(align);
-        if ! self.inner.visit_enter_class(name, n_fields, sz, align) {
+        if ! self.inner.visit_enter_class(name, named_fields, n_fields, sz, align) {
             return false;
         }
         true
     }
 
-    fn visit_class_field(&mut self, i: uint, name: &str, mtbl: uint, inner: *TyDesc) -> bool {
+    fn visit_class_field(&mut self, i: uint, name: &str, named: bool, mtbl: uint,
+                         inner: *TyDesc) -> bool {
         unsafe { self.align((*inner).align); }
-        if ! self.inner.visit_class_field(i, name, mtbl, inner) {
+        if ! self.inner.visit_class_field(i, name, named, mtbl, inner) {
             return false;
         }
         unsafe { self.bump((*inner).size); }
         true
     }
 
-    fn visit_leave_class(&mut self, name: &str, n_fields: uint, sz: uint, align: uint) -> bool {
-        if ! self.inner.visit_leave_class(name, n_fields, sz, align) {
+    fn visit_leave_class(&mut self, name: &str, named_fields: bool, n_fields: uint, sz: uint,
+                         align: uint) -> bool {
+        if ! self.inner.visit_leave_class(name, named_fields, n_fields, sz, align) {
             return false;
         }
         true
@@ -450,9 +453,9 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
         true
     }
 
-    fn visit_trait(&mut self) -> bool {
+    fn visit_trait(&mut self, name: &str) -> bool {
         self.align_to::<@TyVisitor>();
-        if ! self.inner.visit_trait() { return false; }
+        if ! self.inner.visit_trait(name) { return false; }
         self.bump_past::<@TyVisitor>();
         true
     }

src/libstd/repr.rs

@@ -413,31 +413,40 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
         true
     }
 
-    fn visit_enter_class(&mut self, name: &str, n_fields: uint,
+    fn visit_enter_class(&mut self, name: &str, named_fields: bool, n_fields: uint,
                          _sz: uint, _align: uint) -> bool {
         self.writer.write(name.as_bytes());
         if n_fields != 0 {
-            self.writer.write(['{' as u8]);
+            if named_fields {
+                self.writer.write(['{' as u8]);
+            } else {
+                self.writer.write(['(' as u8]);
+            }
         }
         true
     }
 
-    fn visit_class_field(&mut self, i: uint, name: &str,
-                         mtbl: uint, inner: *TyDesc) -> bool {
+    fn visit_class_field(&mut self, i: uint, name: &str, named: bool,
+                         _mtbl: uint, inner: *TyDesc) -> bool {
         if i != 0 {
             self.writer.write(", ".as_bytes());
         }
-        self.write_mut_qualifier(mtbl);
-        self.writer.write(name.as_bytes());
-        self.writer.write(": ".as_bytes());
+        if named {
+            self.writer.write(name.as_bytes());
+            self.writer.write(": ".as_bytes());
+        }
         self.visit_inner(inner);
         true
     }
 
-    fn visit_leave_class(&mut self, _name: &str, n_fields: uint,
+    fn visit_leave_class(&mut self, _name: &str, named_fields: bool, n_fields: uint,
                          _sz: uint, _align: uint) -> bool {
         if n_fields != 0 {
-            self.writer.write(['}' as u8]);
+            if named_fields {
+                self.writer.write(['}' as u8]);
+            } else {
+                self.writer.write([')' as u8]);
+            }
         }
         true
     }
@@ -552,13 +561,19 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
     }
 
     fn visit_enter_fn(&mut self, _purity: uint, _proto: uint,
-                      _n_inputs: uint, _retstyle: uint) -> bool { true }
+                      _n_inputs: uint, _retstyle: uint) -> bool {
+        self.writer.write("fn(".as_bytes());
+        true
+    }
 
     fn visit_fn_input(&mut self, _i: uint, _mode: uint, _inner: *TyDesc) -> bool {
+        // FIXME: #8917: should print out the parameter types here, separated by commas
         true
     }
 
     fn visit_fn_output(&mut self, _retstyle: uint, _inner: *TyDesc) -> bool {
+        self.writer.write(")".as_bytes());
+        // FIXME: #8917: should print out the output type here, as `-> T`
         true
     }
 
@@ -566,7 +581,11 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
                       _n_inputs: uint, _retstyle: uint) -> bool { true }
 
 
-    fn visit_trait(&mut self) -> bool { true }
+    fn visit_trait(&mut self, name: &str) -> bool {
+        self.writer.write(name.as_bytes());
+        true
+    }
+
     fn visit_param(&mut self, _i: uint) -> bool { true }
     fn visit_self(&mut self) -> bool { true }
     fn visit_type(&mut self) -> bool { true }
@@ -597,6 +616,7 @@ struct P {a: int, b: float}
 
 #[test]
 fn test_repr() {
+    use prelude::*;
     use str;
     use str::Str;
     use rt::io::Decorator;
@@ -654,6 +674,12 @@ fn test_repr() {
     exact_test(&(10u64, ~"hello"),
                "(10u64, ~\"hello\")");
 
+    exact_test(&(&println), "&fn()");
+    exact_test(&(~5 as ~ToStr), "~to_str::ToStr:Send");
+
     struct Foo;
     exact_test(&(~[Foo, Foo]), "~[repr::test_repr::Foo, repr::test_repr::Foo]");
+
+    struct Bar(int, int);
+    exact_test(&(Bar(2, 2)), "repr::test_repr::Bar(2, 2)");
 }

src/libstd/unstable/intrinsics.rs

@@ -220,11 +220,11 @@ pub trait TyVisitor {
     fn visit_leave_rec(&mut self, n_fields: uint,
                        sz: uint, align: uint) -> bool;
 
-    fn visit_enter_class(&mut self, name: &str, n_fields: uint,
+    fn visit_enter_class(&mut self, name: &str, named_fields: bool, n_fields: uint,
                          sz: uint, align: uint) -> bool;
-    fn visit_class_field(&mut self, i: uint, name: &str,
+    fn visit_class_field(&mut self, i: uint, name: &str, named: bool,
                          mtbl: uint, inner: *TyDesc) -> bool;
-    fn visit_leave_class(&mut self, name: &str, n_fields: uint,
+    fn visit_leave_class(&mut self, name: &str, named_fields: bool, n_fields: uint,
                          sz: uint, align: uint) -> bool;
 
     fn visit_enter_tup(&mut self, n_fields: uint,
@@ -256,7 +256,7 @@ pub trait TyVisitor {
     fn visit_leave_fn(&mut self, purity: uint, proto: uint,
                       n_inputs: uint, retstyle: uint) -> bool;
 
-    fn visit_trait(&mut self) -> bool;
+    fn visit_trait(&mut self, name: &str) -> bool;
     fn visit_param(&mut self, i: uint) -> bool;
     fn visit_self(&mut self) -> bool;
     fn visit_type(&mut self) -> bool;

src/libsyntax/parse/token.rs

@@ -436,7 +436,7 @@ fn mk_fresh_ident_interner() -> @ident_interner {
         "blk",                // 26
         "static",             // 27
         "__foreign_mod__",    // 28
-        "__field__",          // 29
+        "<unnamed_field>",    // 29
         "C",                  // 30
         "Self",               // 31
 

src/test/debug-info/tuple-struct.rs

@@ -34,7 +34,8 @@
 
 
 // This test case mainly makes sure that no field names are generated for tuple structs (as opposed
-// to all fields having the name "__field__"). Otherwise they are handled the same a normal structs.
+// to all fields having the name "<unnamed_field>"). Otherwise they are handled the same a normal
+// structs.
 
 struct NoPadding16(u16, i16);
 struct NoPadding32(i32, f32, u32);

src/test/run-pass/reflect-visit-data.rs

@@ -317,26 +317,26 @@ impl<V:TyVisitor + movable_ptr> TyVisitor for ptr_visit_adaptor<V> {
         true
     }
 
-    fn visit_enter_class(&mut self, name: &str, n_fields: uint, sz: uint, align: uint)
-                      -> bool {
+    fn visit_enter_class(&mut self, name: &str, named_fields: bool, n_fields: uint, sz: uint,
+                         align: uint) -> bool {
         self.align(align);
-        if ! self.inner.visit_enter_class(name, n_fields, sz, align) {
+        if ! self.inner.visit_enter_class(name, named_fields, n_fields, sz, align) {
             return false;
         }
         true
     }
 
-    fn visit_class_field(&mut self, i: uint, name: &str,
+    fn visit_class_field(&mut self, i: uint, name: &str, named: bool,
                          mtbl: uint, inner: *TyDesc) -> bool {
-        if ! self.inner.visit_class_field(i, name, mtbl, inner) {
+        if ! self.inner.visit_class_field(i, name, named, mtbl, inner) {
             return false;
         }
         true
     }
 
-    fn visit_leave_class(&mut self, name: &str, n_fields: uint, sz: uint, align: uint)
-                      -> bool {
-        if ! self.inner.visit_leave_class(name, n_fields, sz, align) {
+    fn visit_leave_class(&mut self, name: &str, named_fields: bool, n_fields: uint, sz: uint,
+                         align: uint) -> bool {
+        if ! self.inner.visit_leave_class(name, named_fields, n_fields, sz, align) {
             return false;
         }
         true
@@ -428,9 +428,9 @@ impl<V:TyVisitor + movable_ptr> TyVisitor for ptr_visit_adaptor<V> {
         true
     }
 
-    fn visit_trait(&mut self) -> bool {
+    fn visit_trait(&mut self, name: &str) -> bool {
         self.align_to::<@TyVisitor>();
-        if ! self.inner.visit_trait() { return false; }
+        if ! self.inner.visit_trait(name) { return false; }
         self.bump_past::<@TyVisitor>();
         true
     }
@@ -565,13 +565,13 @@ impl TyVisitor for my_visitor {
     fn visit_leave_rec(&mut self, _n_fields: uint,
                        _sz: uint, _align: uint) -> bool { true }
 
-    fn visit_enter_class(&mut self, _name: &str, _n_fields: uint,
+    fn visit_enter_class(&mut self, _name: &str, _named_fields: bool, _n_fields: uint,
                          _sz: uint, _align: uint) -> bool { true }
-    fn visit_class_field(&mut self, _i: uint, _name: &str,
+    fn visit_class_field(&mut self, _i: uint, _name: &str, _named: bool,
                          _mtbl: uint, inner: *TyDesc) -> bool {
         self.visit_inner(inner)
     }
-    fn visit_leave_class(&mut self, _name: &str, _n_fields: uint,
+    fn visit_leave_class(&mut self, _name: &str, _named_fields: bool, _n_fields: uint,
                          _sz: uint, _align: uint) -> bool { true }
 
     fn visit_enter_tup(&mut self, _n_fields: uint,
@@ -616,7 +616,7 @@ impl TyVisitor for my_visitor {
                       _n_inputs: uint, _retstyle: uint) -> bool { true }
 
 
-    fn visit_trait(&mut self) -> bool { true }
+    fn visit_trait(&mut self, _name: &str) -> bool { true }
     fn visit_param(&mut self, _i: uint) -> bool { true }
     fn visit_self(&mut self) -> bool { true }
     fn visit_type(&mut self) -> bool { true }

src/test/run-pass/reflect-visit-type.rs

@@ -99,11 +99,11 @@ impl TyVisitor for MyVisitor {
     fn visit_leave_rec(&mut self, _n_fields: uint,
                        _sz: uint, _align: uint) -> bool { true }
 
-    fn visit_enter_class(&mut self, _name: &str, _n_fields: uint,
+    fn visit_enter_class(&mut self, _name: &str, _named_fields: bool, _n_fields: uint,
                          _sz: uint, _align: uint) -> bool { true }
-    fn visit_class_field(&mut self, _i: uint, _name: &str,
+    fn visit_class_field(&mut self, _i: uint, _name: &str, _named: bool,
                          _mtbl: uint, _inner: *TyDesc) -> bool { true }
-    fn visit_leave_class(&mut self, _name: &str, _n_fields: uint,
+    fn visit_leave_class(&mut self, _name: &str, _named_fields: bool, _n_fields: uint,
                          _sz: uint, _align: uint) -> bool { true }
 
     fn visit_enter_tup(&mut self, _n_fields: uint,
@@ -139,7 +139,7 @@ impl TyVisitor for MyVisitor {
                       _n_inputs: uint, _retstyle: uint) -> bool { true }
 
 
-    fn visit_trait(&mut self) -> bool { true }
+    fn visit_trait(&mut self, _name: &str) -> bool { true }
     fn visit_param(&mut self, _i: uint) -> bool { true }
     fn visit_self(&mut self) -> bool { true }
     fn visit_type(&mut self) -> bool { true }