diff --git a/src/libcore/to_str.rs b/src/libcore/to_str.rs index 0145adc77b826..17e4e042a5afc 100644 --- a/src/libcore/to_str.rs +++ b/src/libcore/to_str.rs @@ -74,10 +74,53 @@ impl ToStr for (A, B, C) { } } +impl ToStr for &[A] { + #[inline(always)] + pure fn to_str(&self) -> ~str { + unsafe { + // FIXME #4568 + // Bleh -- not really unsafe + // push_str and push_char + let mut acc = ~"[", first = true; + for self.each |elt| { + unsafe { + if first { first = false; } + else { str::push_str(&mut acc, ~", "); } + str::push_str(&mut acc, elt.to_str()); + } + } + str::push_char(&mut acc, ']'); + acc + } + } +} + impl ToStr for ~[A] { #[inline(always)] pure fn to_str(&self) -> ~str { unsafe { + // FIXME #4568 + // Bleh -- not really unsafe + // push_str and push_char + let mut acc = ~"[", first = true; + for self.each |elt| { + unsafe { + if first { first = false; } + else { str::push_str(&mut acc, ~", "); } + str::push_str(&mut acc, elt.to_str()); + } + } + str::push_char(&mut acc, ']'); + acc + } + } +} + +impl ToStr for @[A] { + #[inline(always)] + pure fn to_str(&self) -> ~str { + unsafe { + // FIXME #4568 // Bleh -- not really unsafe // push_str and push_char let mut acc = ~"[", first = true; diff --git a/src/test/run-pass/vec-to_str.rs b/src/test/run-pass/vec-to_str.rs new file mode 100644 index 0000000000000..fed091e0fe681 --- /dev/null +++ b/src/test/run-pass/vec-to_str.rs @@ -0,0 +1,24 @@ +// Copyright 2013 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 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +pub fn main() { + assert (~[0, 1]).to_str() == ~"[0, 1]"; + assert (&[1, 2]).to_str() == ~"[1, 2]"; + assert (@[2, 3]).to_str() == ~"[2, 3]"; + + let foo = ~[3, 4]; + let bar = &[4, 5]; + let baz = @[5, 6]; + + assert foo.to_str() == ~"[3, 4]"; + assert bar.to_str() == ~"[4, 5]"; + assert baz.to_str() == ~"[5, 6]"; + +}