rust/src/test/run-pass/ifmt.rs

// 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 <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.

use std::fmt;

struct A;
struct B;

#[fmt="foo"]
impl fmt::Signed for A {
    fn fmt(_: &A, f: &mut fmt::Formatter) { f.buf.write("aloha".as_bytes()); }
}
impl fmt::Signed for B {
    fn fmt(_: &B, f: &mut fmt::Formatter) { f.buf.write("adios".as_bytes()); }
}

pub fn main() {
    macro_rules! t(($a:expr, $b:expr) => { assert_eq!($a, $b.to_owned()) })

    // Make sure there's a poly formatter that takes anything
    t!(ifmt!("{}", 1), "1");
    t!(ifmt!("{}", A), "{}");
    t!(ifmt!("{}", ()), "()");
    t!(ifmt!("{}", @(~1, "foo")), "@(~1, \"foo\")");

    // Various edge cases without formats
    t!(ifmt!(""), "");
    t!(ifmt!("hello"), "hello");
    t!(ifmt!("hello \\{"), "hello {");

    // At least exercise all the formats
    t!(ifmt!("{:b}", true), "true");
    t!(ifmt!("{:c}", '☃'), "☃");
    t!(ifmt!("{:d}", 10), "10");
    t!(ifmt!("{:i}", 10), "10");
    t!(ifmt!("{:u}", 10u), "10");
    t!(ifmt!("{:o}", 10u), "12");
    t!(ifmt!("{:x}", 10u), "a");
    t!(ifmt!("{:X}", 10u), "A");
    t!(ifmt!("{:s}", "foo"), "foo");
    t!(ifmt!("{:p}", 0x1234 as *int), "0x1234");
    t!(ifmt!("{:p}", 0x1234 as *mut int), "0x1234");
    t!(ifmt!("{:d}", A), "aloha");
    t!(ifmt!("{:d}", B), "adios");
    t!(ifmt!("foo {:s} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃");
    t!(ifmt!("{1} {0}", 0, 1), "1 0");
    t!(ifmt!("{foo} {bar}", foo=0, bar=1), "0 1");
    t!(ifmt!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0");
    t!(ifmt!("{} {0:s}", "a"), "a a");
    t!(ifmt!("{} {0}", "a"), "\"a\" \"a\"");

    // Methods should probably work
    t!(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 0u), "c0");
    t!(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 1u), "a1");
    t!(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 2u), "b2");
    t!(ifmt!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 3u), "d3");
    t!(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "a"), "aa");
    t!(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "b"), "bb");
    t!(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "c"), "cc");
    t!(ifmt!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "d"), "dd");
    t!(ifmt!("{1, select, a{#{0:s}} other{#{1}}}", "b", "a"), "ab");
    t!(ifmt!("{1, select, a{#{0}} other{#{1}}}", "c", "b"), "bb");

    // Formatting strings and their arguments
    t!(ifmt!("{:s}", "a"), "a");
    t!(ifmt!("{:4s}", "a"), "a   ");
    t!(ifmt!("{:>4s}", "a"), "   a");
    t!(ifmt!("{:<4s}", "a"), "a   ");
    t!(ifmt!("{:.4s}", "a"), "a");
    t!(ifmt!("{:4.4s}", "a"), "a   ");
    t!(ifmt!("{:4.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
    t!(ifmt!("{:<4.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
    t!(ifmt!("{:>4.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
    t!(ifmt!("{:>10.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
    t!(ifmt!("{:2.4s}", "aaaaa"), "aaaa");
    t!(ifmt!("{:2.4s}", "aaaa"), "aaaa");
    t!(ifmt!("{:2.4s}", "aaa"), "aaa");
    t!(ifmt!("{:2.4s}", "aa"), "aa");
    t!(ifmt!("{:2.4s}", "a"), "a ");
    t!(ifmt!("{:0>2s}", "a"), "0a");
    t!(ifmt!("{:.*s}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa");
    t!(ifmt!("{:.1$s}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa");
    t!(ifmt!("{:1$s}", "a", 4), "a   ");
    t!(ifmt!("{:-#s}", "a"), "a");
    t!(ifmt!("{:+#s}", "a"), "a");

    // Precision overrides 0-padding
    // FIXME #2481: Recent gcc's report some of these as warnings
    /*t!(ifmt!("{:0>6.5d}", 0), ~" 00000");*/
    /*t!(ifmt!("{:0>6.5u}", 0u), ~" 00000");*/
    /*t!(ifmt!("{:0>6.5x}", 0u), ~" 00000");*/
    /*t!(ifmt!("{:0>6.5d}", 10), ~" 00010");*/
    /*t!(ifmt!("{:0>6.5d}", -10), ~"-00010");*/
    /*t!(ifmt!("{:0>6.5u}", 10u), ~" 00010");*/
    /*t!(ifmt!("{:0>6.5s}", ~"t!"), ~"  t!");*/
    /*t!(ifmt!("{:0>6.5c}", 'A'), ~"     A");*/
    /*t!(ifmt!("{:0>6.5x}", 127u), ~" 0007f");*/
    /*t!(ifmt!("{:0>6.5X}", 127u), ~" 0007F");*/
    /*t!(ifmt!("{:0>6.5o}", 10u), ~" 00012");*/

    // Signed combinations
    /*t!(ifmt!("{:5d}", 1), ~"    1");*/
    /*t!(ifmt!("{: >5d}", -1), ~"   -1");*/
    /*t!(ifmt!("{:+5d}", 1), ~"   +1");*/
    /*t!(ifmt!("{:+5d}", -1), ~"   -1");*/
    /*t!(ifmt!("{:0>5d}", 1), ~" 0001");*/
    /*t!(ifmt!("{:0>5d}", -1), ~"-0001");*/
    /*t!(ifmt!("{:0>+5d}", 1), ~"+0001");*/
    /*t!(ifmt!("{:0>+5d}", -1), ~"-0001");*/
    /*t!(ifmt!("%- 5d", 1), ~" 1   ");*/
    /*t!(ifmt!("%- 5d", -1), ~"-1   ");*/
    /*t!(ifmt!("%-+5d", 1), ~"+1   ");*/
    /*t!(ifmt!("%-+5d", -1), ~"-1   ");*/
    /*t!(ifmt!("%- 05d", 1), ~" 1   ");*/
    /*t!(ifmt!("%- 05d", -1), ~"-1   ");*/
    /*t!(ifmt!("%-+05d", 1), ~"+1   ");*/
    /*t!(ifmt!("%-+05d", -1), ~"-1   ");*/
}