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9346a6ac | 1 | // Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT |
1a4d82fc JJ |
2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
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. | |
10 | ||
11 | // no-pretty-expanded unnecessary unsafe block generated | |
1a4d82fc JJ |
12 | |
13 | #![deny(warnings)] | |
14 | #![allow(unused_must_use)] | |
54a0048b | 15 | #![allow(unused_features)] |
1a4d82fc | 16 | #![feature(box_syntax)] |
54a0048b | 17 | #![feature(question_mark)] |
1a4d82fc | 18 | |
62682a34 | 19 | use std::fmt::{self, Write}; |
c34b1796 | 20 | use std::usize; |
1a4d82fc JJ |
21 | |
22 | struct A; | |
23 | struct B; | |
24 | struct C; | |
62682a34 | 25 | struct D; |
1a4d82fc JJ |
26 | |
27 | impl fmt::LowerHex for A { | |
28 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | |
29 | f.write_str("aloha") | |
30 | } | |
31 | } | |
32 | impl fmt::UpperHex for B { | |
33 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | |
34 | f.write_str("adios") | |
35 | } | |
36 | } | |
85aaf69f | 37 | impl fmt::Display for C { |
1a4d82fc JJ |
38 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
39 | f.pad_integral(true, "☃", "123") | |
40 | } | |
41 | } | |
62682a34 SL |
42 | impl fmt::Binary for D { |
43 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { | |
54a0048b SL |
44 | f.write_str("aa")?; |
45 | f.write_char('☃')?; | |
62682a34 SL |
46 | f.write_str("bb") |
47 | } | |
48 | } | |
1a4d82fc JJ |
49 | |
50 | macro_rules! t { | |
85aaf69f | 51 | ($a:expr, $b:expr) => { assert_eq!($a, $b) } |
1a4d82fc JJ |
52 | } |
53 | ||
54 | pub fn main() { | |
55 | // Various edge cases without formats | |
56 | t!(format!(""), ""); | |
57 | t!(format!("hello"), "hello"); | |
58 | t!(format!("hello {{"), "hello {"); | |
59 | ||
60 | // default formatters should work | |
61 | t!(format!("{}", 1.0f32), "1"); | |
62 | t!(format!("{}", 1.0f64), "1"); | |
63 | t!(format!("{}", "a"), "a"); | |
64 | t!(format!("{}", "a".to_string()), "a"); | |
65 | t!(format!("{}", false), "false"); | |
66 | t!(format!("{}", 'a'), "a"); | |
67 | ||
68 | // At least exercise all the formats | |
69 | t!(format!("{}", true), "true"); | |
70 | t!(format!("{}", '☃'), "☃"); | |
85aaf69f SL |
71 | t!(format!("{}", 10), "10"); |
72 | t!(format!("{}", 10_usize), "10"); | |
1a4d82fc | 73 | t!(format!("{:?}", '☃'), "'\\u{2603}'"); |
85aaf69f SL |
74 | t!(format!("{:?}", 10), "10"); |
75 | t!(format!("{:?}", 10_usize), "10"); | |
1a4d82fc JJ |
76 | t!(format!("{:?}", "true"), "\"true\""); |
77 | t!(format!("{:?}", "foo\nbar"), "\"foo\\nbar\""); | |
b039eaaf SL |
78 | t!(format!("{:?}", "foo\n\"bar\"\r\n\'baz\'\t\\qux\\"), |
79 | r#""foo\n\"bar\"\r\n\'baz\'\t\\qux\\""#); | |
80 | t!(format!("{:?}", "foo\0bar\x01baz\u{3b1}q\u{75}x"), | |
81 | r#""foo\u{0}bar\u{1}baz\u{3b1}qux""#); | |
85aaf69f SL |
82 | t!(format!("{:o}", 10_usize), "12"); |
83 | t!(format!("{:x}", 10_usize), "a"); | |
84 | t!(format!("{:X}", 10_usize), "A"); | |
1a4d82fc JJ |
85 | t!(format!("{}", "foo"), "foo"); |
86 | t!(format!("{}", "foo".to_string()), "foo"); | |
9346a6ac AL |
87 | if cfg!(target_pointer_width = "32") { |
88 | t!(format!("{:#p}", 0x1234 as *const isize), "0x00001234"); | |
89 | t!(format!("{:#p}", 0x1234 as *mut isize), "0x00001234"); | |
90 | } else { | |
91 | t!(format!("{:#p}", 0x1234 as *const isize), "0x0000000000001234"); | |
92 | t!(format!("{:#p}", 0x1234 as *mut isize), "0x0000000000001234"); | |
93 | } | |
85aaf69f SL |
94 | t!(format!("{:p}", 0x1234 as *const isize), "0x1234"); |
95 | t!(format!("{:p}", 0x1234 as *mut isize), "0x1234"); | |
1a4d82fc JJ |
96 | t!(format!("{:x}", A), "aloha"); |
97 | t!(format!("{:X}", B), "adios"); | |
98 | t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃"); | |
85aaf69f SL |
99 | t!(format!("{1} {0}", 0, 1), "1 0"); |
100 | t!(format!("{foo} {bar}", foo=0, bar=1), "0 1"); | |
101 | t!(format!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0"); | |
1a4d82fc | 102 | t!(format!("{} {0}", "a"), "a a"); |
85aaf69f SL |
103 | t!(format!("{foo_bar}", foo_bar=1), "1"); |
104 | t!(format!("{}", 5 + 5), "10"); | |
1a4d82fc | 105 | t!(format!("{:#4}", C), "☃123"); |
62682a34 | 106 | t!(format!("{:b}", D), "aa☃bb"); |
1a4d82fc | 107 | |
9346a6ac AL |
108 | let a: &fmt::Debug = &1; |
109 | t!(format!("{:?}", a), "1"); | |
1a4d82fc JJ |
110 | |
111 | ||
112 | // Formatting strings and their arguments | |
113 | t!(format!("{}", "a"), "a"); | |
114 | t!(format!("{:4}", "a"), "a "); | |
115 | t!(format!("{:4}", "☃"), "☃ "); | |
116 | t!(format!("{:>4}", "a"), " a"); | |
117 | t!(format!("{:<4}", "a"), "a "); | |
118 | t!(format!("{:^5}", "a"), " a "); | |
119 | t!(format!("{:^5}", "aa"), " aa "); | |
120 | t!(format!("{:^4}", "a"), " a "); | |
121 | t!(format!("{:^4}", "aa"), " aa "); | |
122 | t!(format!("{:.4}", "a"), "a"); | |
123 | t!(format!("{:4.4}", "a"), "a "); | |
124 | t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); | |
125 | t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); | |
126 | t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); | |
127 | t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); | |
128 | t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); | |
129 | t!(format!("{:2.4}", "aaaaa"), "aaaa"); | |
130 | t!(format!("{:2.4}", "aaaa"), "aaaa"); | |
131 | t!(format!("{:2.4}", "aaa"), "aaa"); | |
132 | t!(format!("{:2.4}", "aa"), "aa"); | |
133 | t!(format!("{:2.4}", "a"), "a "); | |
134 | t!(format!("{:0>2}", "a"), "0a"); | |
135 | t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa"); | |
136 | t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa"); | |
137 | t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa"); | |
138 | t!(format!("{:1$}", "a", 4), "a "); | |
139 | t!(format!("{1:0$}", 4, "a"), "a "); | |
140 | t!(format!("{:a$}", "a", a=4), "a "); | |
141 | t!(format!("{:-#}", "a"), "a"); | |
142 | t!(format!("{:+#}", "a"), "a"); | |
143 | ||
144 | // Some float stuff | |
145 | t!(format!("{:}", 1.0f32), "1"); | |
146 | t!(format!("{:}", 1.0f64), "1"); | |
147 | t!(format!("{:.3}", 1.0f64), "1.000"); | |
148 | t!(format!("{:10.3}", 1.0f64), " 1.000"); | |
149 | t!(format!("{:+10.3}", 1.0f64), " +1.000"); | |
150 | t!(format!("{:+10.3}", -1.0f64), " -1.000"); | |
151 | ||
152 | t!(format!("{:e}", 1.2345e6f32), "1.2345e6"); | |
153 | t!(format!("{:e}", 1.2345e6f64), "1.2345e6"); | |
154 | t!(format!("{:E}", 1.2345e6f64), "1.2345E6"); | |
155 | t!(format!("{:.3e}", 1.2345e6f64), "1.234e6"); | |
156 | t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6"); | |
157 | t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6"); | |
158 | t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6"); | |
159 | ||
9346a6ac AL |
160 | // Float edge cases |
161 | t!(format!("{}", -0.0), "0"); | |
162 | t!(format!("{:?}", -0.0), "-0"); | |
163 | t!(format!("{:?}", 0.0), "0"); | |
164 | ||
165 | ||
c34b1796 AL |
166 | // Test that pointers don't get truncated. |
167 | { | |
168 | let val = usize::MAX; | |
169 | let exp = format!("{:#x}", val); | |
170 | t!(format!("{:p}", val as *const isize), exp); | |
171 | } | |
172 | ||
1a4d82fc JJ |
173 | // Escaping |
174 | t!(format!("{{"), "{"); | |
175 | t!(format!("}}"), "}"); | |
176 | ||
177 | test_write(); | |
178 | test_print(); | |
179 | test_order(); | |
180 | ||
181 | // make sure that format! doesn't move out of local variables | |
c34b1796 | 182 | let a: Box<_> = box 3; |
1a4d82fc JJ |
183 | format!("{}", a); |
184 | format!("{}", a); | |
185 | ||
186 | // make sure that format! doesn't cause spurious unused-unsafe warnings when | |
187 | // it's inside of an outer unsafe block | |
188 | unsafe { | |
85aaf69f | 189 | let a: isize = ::std::mem::transmute(3_usize); |
1a4d82fc JJ |
190 | format!("{}", a); |
191 | } | |
192 | ||
193 | test_format_args(); | |
194 | ||
195 | // test that trailing commas are acceptable | |
196 | format!("{}", "test",); | |
197 | format!("{foo}", foo="test",); | |
198 | } | |
199 | ||
200 | // Basic test to make sure that we can invoke the `write!` macro with an | |
85aaf69f | 201 | // fmt::Write instance. |
1a4d82fc | 202 | fn test_write() { |
85aaf69f | 203 | use std::fmt::Write; |
1a4d82fc | 204 | let mut buf = String::new(); |
85aaf69f | 205 | write!(&mut buf, "{}", 3); |
1a4d82fc JJ |
206 | { |
207 | let w = &mut buf; | |
85aaf69f | 208 | write!(w, "{foo}", foo=4); |
1a4d82fc JJ |
209 | write!(w, "{}", "hello"); |
210 | writeln!(w, "{}", "line"); | |
211 | writeln!(w, "{foo}", foo="bar"); | |
d9579d0f AL |
212 | w.write_char('☃'); |
213 | w.write_str("str"); | |
1a4d82fc JJ |
214 | } |
215 | ||
d9579d0f | 216 | t!(buf, "34helloline\nbar\n☃str"); |
1a4d82fc JJ |
217 | } |
218 | ||
219 | // Just make sure that the macros are defined, there's not really a lot that we | |
220 | // can do with them just yet (to test the output) | |
221 | fn test_print() { | |
222 | print!("hi"); | |
223 | print!("{:?}", vec!(0u8)); | |
224 | println!("hello"); | |
225 | println!("this is a {}", "test"); | |
226 | println!("{foo}", foo="bar"); | |
227 | } | |
228 | ||
229 | // Just make sure that the macros are defined, there's not really a lot that we | |
230 | // can do with them just yet (to test the output) | |
231 | fn test_format_args() { | |
85aaf69f | 232 | use std::fmt::Write; |
1a4d82fc JJ |
233 | let mut buf = String::new(); |
234 | { | |
235 | let w = &mut buf; | |
85aaf69f | 236 | write!(w, "{}", format_args!("{}", 1)); |
1a4d82fc | 237 | write!(w, "{}", format_args!("test")); |
85aaf69f | 238 | write!(w, "{}", format_args!("{test}", test=3)); |
1a4d82fc JJ |
239 | } |
240 | let s = buf; | |
241 | t!(s, "1test3"); | |
242 | ||
243 | let s = fmt::format(format_args!("hello {}", "world")); | |
244 | t!(s, "hello world"); | |
245 | let s = format!("{}: {}", "args were", format_args!("hello {}", "world")); | |
246 | t!(s, "args were: hello world"); | |
247 | } | |
248 | ||
249 | fn test_order() { | |
250 | // Make sure format!() arguments are always evaluated in a left-to-right | |
251 | // ordering | |
85aaf69f SL |
252 | fn foo() -> isize { |
253 | static mut FOO: isize = 0; | |
1a4d82fc JJ |
254 | unsafe { |
255 | FOO += 1; | |
256 | FOO | |
257 | } | |
258 | } | |
259 | assert_eq!(format!("{} {} {a} {b} {} {c}", | |
260 | foo(), foo(), foo(), a=foo(), b=foo(), c=foo()), | |
261 | "1 2 4 5 3 6".to_string()); | |
262 | } |