Add 'copy' bounds to functions that were faultily accepted without

Issue #1390

Author: marijnh

src/libcore/option.rs

@@ -36,7 +36,7 @@ pure fn get<copy T>(opt: t<T>) -> T {
 
 /*
 */
-fn map<T, U>(opt: t<T>, f: block(T) -> U) -> t<U> {
+fn map<T, copy U>(opt: t<T>, f: block(T) -> U) -> t<U> {
     alt opt { some(x) { some(f(x)) } none. { none } }
 }
 
@@ -61,7 +61,7 @@ Function: from_maybe
 
 Returns the contained value or a default
 */
-pure fn from_maybe<T>(def: T, opt: t<T>) -> T {
+pure fn from_maybe<copy T>(def: T, opt: t<T>) -> T {
     alt opt { some(x) { x } none. { def } }
 }
 
@@ -70,7 +70,7 @@ Function: maybe
 
 Applies a function to the contained value or returns a default
 */
-fn maybe<T, U>(def: U, opt: t<T>, f: block(T) -> U) -> U {
+fn maybe<T, copy U>(def: U, opt: t<T>, f: block(T) -> U) -> U {
     alt opt { none. { def } some(t) { f(t) } }
 }
 

src/libcore/result.rs

@@ -37,7 +37,7 @@ Failure:
 
 If the result is an error
 */
-fn get<T, U>(res: t<T, U>) -> T {
+fn get<copy T, U>(res: t<T, U>) -> T {
     alt res {
       ok(t) { t }
       err(_) {
@@ -57,7 +57,7 @@ Failure:
 
 If the result is not an error
 */
-fn get_err<T, U>(res: t<T, U>) -> U {
+fn get_err<T, copy U>(res: t<T, U>) -> U {
     alt res {
       err(u) { u }
       ok(_) {

src/libstd/deque.rs

@@ -57,7 +57,7 @@ fn create<copy T>() -> t<T> {
 
         ret rv;
     }
-    fn get<T>(elts: [mutable cell<T>], i: uint) -> T {
+    fn get<copy T>(elts: [mutable cell<T>], i: uint) -> T {
         ret alt elts[i] { option::some(t) { t } _ { fail } };
     }
     obj deque<copy T>(mutable nelts: uint,

src/libstd/util.rs

@@ -7,7 +7,7 @@ Function: id
 
 The identity function
 */
-pure fn id<T>(x: T) -> T { x }
+pure fn id<copy T>(x: T) -> T { x }
 
 /*
 Function: unreachable

src/test/run-pass/expr-alt-generic-box2.rs

@@ -4,7 +4,7 @@
 // -*- rust -*-
 type compare<T> = fn@(T, T) -> bool;
 
-fn test_generic<T>(expected: T, eq: compare<T>) {
+fn test_generic<copy T>(expected: T, eq: compare<T>) {
     let actual: T = alt true { true { expected } };
     assert (eq(expected, actual));
 }

src/test/run-pass/expr-alt-generic-unique1.rs

@@ -3,7 +3,7 @@
 // -*- rust -*-
 type compare<T> = fn@(~T, ~T) -> bool;
 
-fn test_generic<T>(expected: ~T, eq: compare<T>) {
+fn test_generic<copy T>(expected: ~T, eq: compare<T>) {
     let actual: ~T = alt true { true { expected } };
     assert (eq(expected, actual));
 }

src/test/run-pass/expr-alt-generic-unique2.rs

@@ -4,7 +4,7 @@
 // -*- rust -*-
 type compare<T> = fn@(T, T) -> bool;
 
-fn test_generic<T>(expected: T, eq: compare<T>) {
+fn test_generic<copy T>(expected: T, eq: compare<T>) {
     let actual: T = alt true { true { expected } };
     assert (eq(expected, actual));
 }

src/test/run-pass/expr-alt-generic.rs

@@ -4,7 +4,7 @@
 // -*- rust -*-
 type compare<T> = fn@(T, T) -> bool;
 
-fn test_generic<T>(expected: T, eq: compare<T>) {
+fn test_generic<copy T>(expected: T, eq: compare<T>) {
     let actual: T = alt true { true { expected } };
     assert (eq(expected, actual));
 }

src/test/run-pass/expr-fn.rs

@@ -9,7 +9,7 @@ fn test_vec() {
 }
 
 fn test_generic() {
-    fn f<T>(t: T) -> T { t }
+    fn f<copy T>(t: T) -> T { t }
     assert (f(10) == 10);
 }