a32498d846
correct handling of moves for struct-record update. Part of #3678. Fixes #2828, #3904, #4719.
144 lines
3.8 KiB
Rust
144 lines
3.8 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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/*!
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The `ToStr` trait for converting to strings
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*/
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use kinds::Copy;
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use str;
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use vec;
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pub trait ToStr {
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pure fn to_str(&self) -> ~str;
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}
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impl bool: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { ::bool::to_str(*self) }
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}
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impl (): ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { ~"()" }
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}
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impl ~str: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { copy *self }
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}
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impl &str: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { ::str::from_slice(*self) }
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}
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impl @str: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { ::str::from_slice(*self) }
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}
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impl<A: ToStr, B: ToStr> (A, B): ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str {
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// FIXME(#4760): this causes an llvm assertion
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//let &(ref a, ref b) = self;
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match *self {
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(ref a, ref b) => {
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~"(" + a.to_str() + ~", " + b.to_str() + ~")"
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}
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}
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}
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}
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impl<A: ToStr, B: ToStr, C: ToStr> (A, B, C): ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str {
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// FIXME(#4760): this causes an llvm assertion
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//let &(ref a, ref b, ref c) = self;
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match *self {
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(ref a, ref b, ref c) => {
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fmt!("(%s, %s, %s)",
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(*a).to_str(),
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(*b).to_str(),
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(*c).to_str()
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)
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}
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}
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}
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}
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impl<A: ToStr> ~[A]: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str {
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unsafe {
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// Bleh -- not really unsafe
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// push_str and push_char
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let mut acc = ~"[", first = true;
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for self.each |elt| {
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unsafe {
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if first { first = false; }
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else { str::push_str(&mut acc, ~", "); }
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str::push_str(&mut acc, elt.to_str());
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}
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}
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str::push_char(&mut acc, ']');
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move acc
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}
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}
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}
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impl<A: ToStr> @A: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { ~"@" + (**self).to_str() }
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}
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impl<A: ToStr> ~A: ToStr {
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#[inline(always)]
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pure fn to_str(&self) -> ~str { ~"~" + (**self).to_str() }
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}
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#[cfg(test)]
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#[allow(non_implicitly_copyable_typarams)]
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mod tests {
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#[test]
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fn test_simple_types() {
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assert 1i.to_str() == ~"1";
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assert (-1i).to_str() == ~"-1";
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assert 200u.to_str() == ~"200";
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assert 2u8.to_str() == ~"2";
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assert true.to_str() == ~"true";
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assert false.to_str() == ~"false";
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assert ().to_str() == ~"()";
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assert (~"hi").to_str() == ~"hi";
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assert (@"hi").to_str() == ~"hi";
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}
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#[test]
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fn test_tuple_types() {
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assert (1, 2).to_str() == ~"(1, 2)";
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assert (~"a", ~"b", false).to_str() == ~"(a, b, false)";
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assert ((), ((), 100)).to_str() == ~"((), ((), 100))";
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}
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#[test]
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#[ignore]
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fn test_vectors() {
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let x: ~[int] = ~[];
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assert x.to_str() == ~"~[]";
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assert (~[1]).to_str() == ~"~[1]";
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assert (~[1, 2, 3]).to_str() == ~"~[1, 2, 3]";
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assert (~[~[], ~[1], ~[1, 1]]).to_str() ==
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~"~[~[], ~[1], ~[1, 1]]";
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}
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#[test]
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fn test_pointer_types() {
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assert (@1).to_str() == ~"@1";
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assert (~(true, false)).to_str() == ~"~(true, false)";
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}
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}
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