1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // no-pretty-expanded unnecessary unsafe block generated
12 // ignore-lexer-test FIXME #15679
14 #![feature(macro_rules)]
16 #![allow(unused_must_use)]
25 impl fmt::LowerHex for A {
26 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
27 f.write("aloha".as_bytes())
30 impl fmt::UpperHex for B {
31 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
32 f.write("adios".as_bytes())
35 impl fmt::Show for C {
36 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
37 f.pad_integral(true, "☃", "123".as_bytes())
41 macro_rules! t(($a:expr, $b:expr) => { assert_eq!($a.as_slice(), $b) })
44 // Various edge cases without formats
46 t!(format!("hello"), "hello");
47 t!(format!("hello {{"), "hello {");
49 // default formatters should work
50 t!(format!("{}", 1.0f32), "1");
51 t!(format!("{}", 1.0f64), "1");
52 t!(format!("{}", "a"), "a");
53 t!(format!("{}", "a".to_string()), "a");
54 t!(format!("{}", false), "false");
55 t!(format!("{}", 'a'), "a");
57 // At least exercise all the formats
58 t!(format!("{}", true), "true");
59 t!(format!("{}", '☃'), "☃");
60 t!(format!("{}", 10i), "10");
61 t!(format!("{}", 10i), "10");
62 t!(format!("{}", 10u), "10");
63 t!(format!("{:o}", 10u), "12");
64 t!(format!("{:x}", 10u), "a");
65 t!(format!("{:X}", 10u), "A");
66 t!(format!("{}", "foo"), "foo");
67 t!(format!("{}", "foo".to_string()), "foo");
68 t!(format!("{:p}", 0x1234 as *const int), "0x1234");
69 t!(format!("{:p}", 0x1234 as *mut int), "0x1234");
70 t!(format!("{:x}", A), "aloha");
71 t!(format!("{:X}", B), "adios");
72 t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃");
73 t!(format!("{1} {0}", 0i, 1i), "1 0");
74 t!(format!("{foo} {bar}", foo=0i, bar=1i), "0 1");
75 t!(format!("{foo} {1} {bar} {0}", 0i, 1i, foo=2i, bar=3i), "2 1 3 0");
76 t!(format!("{} {0}", "a"), "a a");
77 t!(format!("{foo_bar}", foo_bar=1i), "1");
78 t!(format!("{}", 5i + 5i), "10");
79 t!(format!("{:#4}", C), "☃123");
81 let a: &fmt::Show = &1i;
82 t!(format!("{}", a), "1");
84 // Formatting strings and their arguments
85 t!(format!("{}", "a"), "a");
86 t!(format!("{:4}", "a"), "a ");
87 t!(format!("{:4}", "☃"), "☃ ");
88 t!(format!("{:>4}", "a"), " a");
89 t!(format!("{:<4}", "a"), "a ");
90 t!(format!("{:^5}", "a"), " a ");
91 t!(format!("{:^5}", "aa"), " aa ");
92 t!(format!("{:^4}", "a"), " a ");
93 t!(format!("{:^4}", "aa"), " aa ");
94 t!(format!("{:.4}", "a"), "a");
95 t!(format!("{:4.4}", "a"), "a ");
96 t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
97 t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
98 t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
99 t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
100 t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
101 t!(format!("{:2.4}", "aaaaa"), "aaaa");
102 t!(format!("{:2.4}", "aaaa"), "aaaa");
103 t!(format!("{:2.4}", "aaa"), "aaa");
104 t!(format!("{:2.4}", "aa"), "aa");
105 t!(format!("{:2.4}", "a"), "a ");
106 t!(format!("{:0>2}", "a"), "0a");
107 t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa");
108 t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa");
109 t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa");
110 t!(format!("{:1$}", "a", 4), "a ");
111 t!(format!("{1:0$}", 4, "a"), "a ");
112 t!(format!("{:a$}", "a", a=4), "a ");
113 t!(format!("{:-#}", "a"), "a");
114 t!(format!("{:+#}", "a"), "a");
117 t!(format!("{:}", 1.0f32), "1");
118 t!(format!("{:}", 1.0f64), "1");
119 t!(format!("{:.3}", 1.0f64), "1.000");
120 t!(format!("{:10.3}", 1.0f64), " 1.000");
121 t!(format!("{:+10.3}", 1.0f64), " +1.000");
122 t!(format!("{:+10.3}", -1.0f64), " -1.000");
124 t!(format!("{:e}", 1.2345e6f32), "1.2345e6");
125 t!(format!("{:e}", 1.2345e6f64), "1.2345e6");
126 t!(format!("{:E}", 1.2345e6f64), "1.2345E6");
127 t!(format!("{:.3e}", 1.2345e6f64), "1.234e6");
128 t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6");
129 t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6");
130 t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6");
133 t!(format!("{{"), "{");
134 t!(format!("}}"), "}");
140 // make sure that format! doesn't move out of local variables
145 // make sure that format! doesn't cause spurious unused-unsafe warnings when
146 // it's inside of an outer unsafe block
148 let a: int = ::std::mem::transmute(3u);
154 // test that trailing commas are acceptable
155 format!("{}", "test",);
156 format!("{foo}", foo="test",);
159 // Basic test to make sure that we can invoke the `write!` macro with an
160 // io::Writer instance.
162 let mut buf = Vec::new();
163 write!(&mut buf as &mut io::Writer, "{}", 3i);
165 let w = &mut buf as &mut io::Writer;
166 write!(w, "{foo}", foo=4i);
167 write!(w, "{}", "hello");
168 writeln!(w, "{}", "line");
169 writeln!(w, "{foo}", foo="bar");
172 let s = String::from_utf8(buf).unwrap();
173 t!(s, "34helloline\nbar\n");
176 // Just make sure that the macros are defined, there's not really a lot that we
177 // can do with them just yet (to test the output)
180 print!("{}", vec!(0u8));
182 println!("this is a {}", "test");
183 println!("{foo}", foo="bar");
186 // Just make sure that the macros are defined, there's not really a lot that we
187 // can do with them just yet (to test the output)
188 fn test_format_args() {
189 let mut buf = Vec::new();
191 let w = &mut buf as &mut io::Writer;
192 format_args!(|args| { write!(w, "{}", args); }, "{}", 1i);
193 format_args!(|args| { write!(w, "{}", args); }, "test");
194 format_args!(|args| { write!(w, "{}", args); }, "{test}", test=3i);
196 let s = String::from_utf8(buf).unwrap();
199 let s = format_args!(fmt::format, "hello {}", "world");
200 t!(s, "hello world");
201 let s = format_args!(|args| {
202 format!("{}: {}", "args were", args)
203 }, "hello {}", "world");
204 t!(s, "args were: hello world");
208 // Make sure format!() arguments are always evaluated in a left-to-right
211 static mut FOO: int = 0;
217 assert_eq!(format!("{} {} {a} {b} {} {c}",
218 foo(), foo(), foo(), a=foo(), b=foo(), c=foo()),
219 "1 2 4 5 3 6".to_string());