auto merge of #13452 : Ryman/rust/fix_uint_as_u, r=alexcrichton

Fixes #13359.

src/librustc/util/ppaux.rs

@@ -341,10 +341,8 @@ pub fn ty_to_str(cx: &ctxt, typ: t) -> ~str {
       ty_bot => ~"!",
       ty_bool => ~"bool",
       ty_char => ~"char",
-      ty_int(ast::TyI) => ~"int",
-      ty_int(t) => ast_util::int_ty_to_str(t),
-      ty_uint(ast::TyU) => ~"uint",
-      ty_uint(t) => ast_util::uint_ty_to_str(t),
+      ty_int(t) => ast_util::int_ty_to_str(t, None),
+      ty_uint(t) => ast_util::uint_ty_to_str(t, None),
       ty_float(t) => ast_util::float_ty_to_str(t),
       ty_box(typ) => ~"@" + ty_to_str(cx, typ),
       ty_uniq(typ) => ~"~" + ty_to_str(cx, typ),

src/libsyntax/ast.rs

@@ -707,7 +707,7 @@ pub enum IntTy {
 
 impl fmt::Show for IntTy {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f.buf, "{}", ast_util::int_ty_to_str(*self))
+        write!(f.buf, "{}", ast_util::int_ty_to_str(*self, None))
     }
 }
 
@@ -722,7 +722,7 @@ pub enum UintTy {
 
 impl fmt::Show for UintTy {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f.buf, "{}", ast_util::uint_ty_to_str(*self))
+        write!(f.buf, "{}", ast_util::uint_ty_to_str(*self, None))
     }
 }
 

src/libsyntax/ast_util.rs

@@ -132,13 +132,21 @@ pub fn is_path(e: @Expr) -> bool {
     return match e.node { ExprPath(_) => true, _ => false };
 }
 
-pub fn int_ty_to_str(t: IntTy) -> ~str {
-    match t {
-        TyI => ~"",
-        TyI8 => ~"i8",
-        TyI16 => ~"i16",
-        TyI32 => ~"i32",
-        TyI64 => ~"i64"
+// Get a string representation of a signed int type, with its value.
+// We want to avoid "45int" and "-3int" in favor of "45" and "-3"
+pub fn int_ty_to_str(t: IntTy, val: Option<i64>) -> ~str {
+    let s = match t {
+        TyI if val.is_some() => "",
+        TyI => "int",
+        TyI8 => "i8",
+        TyI16 => "i16",
+        TyI32 => "i32",
+        TyI64 => "i64"
+    };
+
+    match val {
+        Some(n) => format!("{}{}", n, s),
+        None => s.to_owned()
     }
 }
 
@@ -151,13 +159,21 @@ pub fn int_ty_max(t: IntTy) -> u64 {
     }
 }
 
-pub fn uint_ty_to_str(t: UintTy) -> ~str {
-    match t {
-        TyU => ~"u",
-        TyU8 => ~"u8",
-        TyU16 => ~"u16",
-        TyU32 => ~"u32",
-        TyU64 => ~"u64"
+// Get a string representation of an unsigned int type, with its value.
+// We want to avoid "42uint" in favor of "42u"
+pub fn uint_ty_to_str(t: UintTy, val: Option<u64>) -> ~str {
+    let s = match t {
+        TyU if val.is_some() => "u",
+        TyU => "uint",
+        TyU8 => "u8",
+        TyU16 => "u16",
+        TyU32 => "u32",
+        TyU64 => "u64"
+    };
+
+    match val {
+        Some(n) => format!("{}{}", n, s),
+        None => s.to_owned()
     }
 }
 

src/libsyntax/parse/token.rs

@@ -201,12 +201,8 @@ pub fn to_str(t: &Token) -> ~str {
           res.push_char('\'');
           res.into_owned()
       }
-      LIT_INT(i, t) => {
-          i.to_str() + ast_util::int_ty_to_str(t)
-      }
-      LIT_UINT(u, t) => {
-          u.to_str() + ast_util::uint_ty_to_str(t)
-      }
+      LIT_INT(i, t) => ast_util::int_ty_to_str(t, Some(i)),
+      LIT_UINT(u, t) => ast_util::uint_ty_to_str(t, Some(u)),
       LIT_INT_UNSUFFIXED(i) => { i.to_str() }
       LIT_FLOAT(s, t) => {
         let mut body = StrBuf::from_str(get_ident(s).get());

src/libsyntax/print/pprust.rs

@@ -2171,10 +2171,10 @@ impl<'a> State<'a> {
                 word(&mut self.s, res.into_owned())
             }
             ast::LitInt(i, t) => {
-                word(&mut self.s, format!("{}{}", i, ast_util::int_ty_to_str(t)))
+                word(&mut self.s, ast_util::int_ty_to_str(t, Some(i)))
             }
             ast::LitUint(u, t) => {
-                word(&mut self.s, format!("{}{}", u, ast_util::uint_ty_to_str(t)))
+                word(&mut self.s, ast_util::uint_ty_to_str(t, Some(u)))
             }
             ast::LitIntUnsuffixed(i) => {
                 word(&mut self.s, format!("{}", i))

src/test/compile-fail/issue13359.rs

@@ -0,0 +1,21 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn foo(_s: i16) { }
+
+fn bar(_s: u32) { }
+
+fn main() {
+    foo(1*(1 as int));
+    //~^ ERROR: mismatched types: expected `i16` but found `int` (expected `i16` but found `int`)
+
+    bar(1*(1 as uint));
+    //~^ ERROR: mismatched types: expected `u32` but found `uint` (expected `u32` but found `uint`)
+}