2 #![allow(unused_must_use)]
3 #![allow(unused_features)]
4 #![feature(box_syntax)]
6 use std::cell::RefCell;
7 use std::fmt::{self, Write};
15 impl fmt::LowerHex for A {
16 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
20 impl fmt::UpperHex for B {
21 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
25 impl fmt::Display for C {
26 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
27 f.pad_integral(true, "☃", "123")
30 impl fmt::Binary for D {
31 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
39 ($a:expr, $b:expr) => { assert_eq!($a, $b) }
43 // Various edge cases without formats
45 t!(format!("hello"), "hello");
46 t!(format!("hello {{"), "hello {");
48 // default formatters should work
49 t!(format!("{}", 1.0f32), "1");
50 t!(format!("{}", 1.0f64), "1");
51 t!(format!("{}", "a"), "a");
52 t!(format!("{}", "a".to_string()), "a");
53 t!(format!("{}", false), "false");
54 t!(format!("{}", 'a'), "a");
56 // At least exercise all the formats
57 t!(format!("{}", true), "true");
58 t!(format!("{}", '☃'), "☃");
59 t!(format!("{}", 10), "10");
60 t!(format!("{}", 10_usize), "10");
61 t!(format!("{:?}", '☃'), "'☃'");
62 t!(format!("{:?}", 10), "10");
63 t!(format!("{:?}", 10_usize), "10");
64 t!(format!("{:?}", "true"), "\"true\"");
65 t!(format!("{:?}", "foo\nbar"), "\"foo\\nbar\"");
66 t!(format!("{:?}", "foo\n\"bar\"\r\n\'baz\'\t\\qux\\"),
67 r#""foo\n\"bar\"\r\n\'baz\'\t\\qux\\""#);
68 t!(format!("{:?}", "foo\0bar\x01baz\u{7f}q\u{75}x"),
69 r#""foo\u{0}bar\u{1}baz\u{7f}qux""#);
70 t!(format!("{:o}", 10_usize), "12");
71 t!(format!("{:x}", 10_usize), "a");
72 t!(format!("{:X}", 10_usize), "A");
73 t!(format!("{}", "foo"), "foo");
74 t!(format!("{}", "foo".to_string()), "foo");
75 if cfg!(target_pointer_width = "32") {
76 t!(format!("{:#p}", 0x1234 as *const isize), "0x00001234");
77 t!(format!("{:#p}", 0x1234 as *mut isize), "0x00001234");
79 t!(format!("{:#p}", 0x1234 as *const isize), "0x0000000000001234");
80 t!(format!("{:#p}", 0x1234 as *mut isize), "0x0000000000001234");
82 t!(format!("{:p}", 0x1234 as *const isize), "0x1234");
83 t!(format!("{:p}", 0x1234 as *mut isize), "0x1234");
84 t!(format!("{:x}", A), "aloha");
85 t!(format!("{:X}", B), "adios");
86 t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃");
87 t!(format!("{1} {0}", 0, 1), "1 0");
88 t!(format!("{foo} {bar}", foo=0, bar=1), "0 1");
89 t!(format!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0");
90 t!(format!("{} {0}", "a"), "a a");
91 t!(format!("{foo_bar}", foo_bar=1), "1");
92 t!(format!("{}", 5 + 5), "10");
93 t!(format!("{:#4}", C), "☃123");
94 t!(format!("{:b}", D), "aa☃bb");
96 let a: &fmt::Debug = &1;
97 t!(format!("{:?}", a), "1");
100 // Formatting strings and their arguments
101 t!(format!("{}", "a"), "a");
102 t!(format!("{:4}", "a"), "a ");
103 t!(format!("{:4}", "☃"), "☃ ");
104 t!(format!("{:>4}", "a"), " a");
105 t!(format!("{:<4}", "a"), "a ");
106 t!(format!("{:^5}", "a"), " a ");
107 t!(format!("{:^5}", "aa"), " aa ");
108 t!(format!("{:^4}", "a"), " a ");
109 t!(format!("{:^4}", "aa"), " aa ");
110 t!(format!("{:.4}", "a"), "a");
111 t!(format!("{:4.4}", "a"), "a ");
112 t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
113 t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
114 t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
115 t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
116 t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), " aaaa");
117 t!(format!("{:2.4}", "aaaaa"), "aaaa");
118 t!(format!("{:2.4}", "aaaa"), "aaaa");
119 t!(format!("{:2.4}", "aaa"), "aaa");
120 t!(format!("{:2.4}", "aa"), "aa");
121 t!(format!("{:2.4}", "a"), "a ");
122 t!(format!("{:0>2}", "a"), "0a");
123 t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa");
124 t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa");
125 t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa");
126 t!(format!("{:1$}", "a", 4), "a ");
127 t!(format!("{1:0$}", 4, "a"), "a ");
128 t!(format!("{:a$}", "a", a=4), "a ");
129 t!(format!("{:-#}", "a"), "a");
130 t!(format!("{:+#}", "a"), "a");
131 t!(format!("{:/^10.8}", "1234567890"), "/12345678/");
134 t!(format!("{:}", 1.0f32), "1");
135 t!(format!("{:}", 1.0f64), "1");
136 t!(format!("{:.3}", 1.0f64), "1.000");
137 t!(format!("{:10.3}", 1.0f64), " 1.000");
138 t!(format!("{:+10.3}", 1.0f64), " +1.000");
139 t!(format!("{:+10.3}", -1.0f64), " -1.000");
141 t!(format!("{:e}", 1.2345e6f32), "1.2345e6");
142 t!(format!("{:e}", 1.2345e6f64), "1.2345e6");
143 t!(format!("{:E}", 1.2345e6f64), "1.2345E6");
144 t!(format!("{:.3e}", 1.2345e6f64), "1.234e6");
145 t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6");
146 t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6");
147 t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6");
150 t!(format!("{}", -0.0), "0");
151 t!(format!("{:?}", -0.0), "-0.0");
152 t!(format!("{:?}", 0.0), "0.0");
154 // sign aware zero padding
155 t!(format!("{:<3}", 1), "1 ");
156 t!(format!("{:>3}", 1), " 1");
157 t!(format!("{:^3}", 1), " 1 ");
158 t!(format!("{:03}", 1), "001");
159 t!(format!("{:<03}", 1), "001");
160 t!(format!("{:>03}", 1), "001");
161 t!(format!("{:^03}", 1), "001");
162 t!(format!("{:+03}", 1), "+01");
163 t!(format!("{:<+03}", 1), "+01");
164 t!(format!("{:>+03}", 1), "+01");
165 t!(format!("{:^+03}", 1), "+01");
166 t!(format!("{:#05x}", 1), "0x001");
167 t!(format!("{:<#05x}", 1), "0x001");
168 t!(format!("{:>#05x}", 1), "0x001");
169 t!(format!("{:^#05x}", 1), "0x001");
170 t!(format!("{:05}", 1.2), "001.2");
171 t!(format!("{:<05}", 1.2), "001.2");
172 t!(format!("{:>05}", 1.2), "001.2");
173 t!(format!("{:^05}", 1.2), "001.2");
174 t!(format!("{:05}", -1.2), "-01.2");
175 t!(format!("{:<05}", -1.2), "-01.2");
176 t!(format!("{:>05}", -1.2), "-01.2");
177 t!(format!("{:^05}", -1.2), "-01.2");
178 t!(format!("{:+05}", 1.2), "+01.2");
179 t!(format!("{:<+05}", 1.2), "+01.2");
180 t!(format!("{:>+05}", 1.2), "+01.2");
181 t!(format!("{:^+05}", 1.2), "+01.2");
183 // Ergonomic format_args!
184 t!(format!("{0:x} {0:X}", 15), "f F");
185 t!(format!("{0:x} {0:X} {}", 15), "f F 15");
186 // NOTE: For now the longer test cases must not be followed immediately by
187 // >1 empty lines, or the pretty printer will break. Since no one wants to
188 // touch the current pretty printer (#751), we have no choice but to work
189 // around it. Some of the following test cases are also affected.
190 t!(format!("{:x}{0:X}{a:x}{:X}{1:x}{a:X}", 13, 14, a=15), "dDfEeF");
191 t!(format!("{a:x} {a:X}", a=15), "f F");
193 // And its edge cases
194 t!(format!("{a:.0$} {b:.0$} {0:.0$}\n{a:.c$} {b:.c$} {c:.c$}",
195 4, a="abcdefg", b="hijklmn", c=3),
196 "abcd hijk 4\nabc hij 3");
197 t!(format!("{a:.*} {0} {:.*}", 4, 3, "efgh", a="abcdef"), "abcd 4 efg");
198 t!(format!("{:.a$} {a} {a:#x}", "aaaaaa", a=2), "aa 2 0x2");
201 // Test that pointers don't get truncated.
203 let val = usize::MAX;
204 let exp = format!("{:#x}", val);
205 t!(format!("{:p}", val as *const isize), exp);
209 t!(format!("{{"), "{");
210 t!(format!("}}"), "}");
217 // make sure that format! doesn't move out of local variables
218 let a: Box<_> = box 3;
222 // make sure that format! doesn't cause spurious unused-unsafe warnings when
223 // it's inside of an outer unsafe block
225 let a: isize = ::std::mem::transmute(3_usize);
231 // test that trailing commas are acceptable
232 format!("{}", "test",);
233 format!("{foo}", foo="test",);
238 // Basic test to make sure that we can invoke the `write!` macro with an
239 // fmt::Write instance.
241 let mut buf = String::new();
242 write!(&mut buf, "{}", 3);
245 write!(w, "{foo}", foo=4);
246 write!(w, "{}", "hello");
247 writeln!(w, "{}", "line");
248 writeln!(w, "{foo}", foo="bar");
253 t!(buf, "34helloline\nbar\n☃str");
256 // Just make sure that the macros are defined, there's not really a lot that we
257 // can do with them just yet (to test the output)
260 print!("{:?}", vec![0u8]);
262 println!("this is a {}", "test");
263 println!("{foo}", foo="bar");
266 // Just make sure that the macros are defined, there's not really a lot that we
267 // can do with them just yet (to test the output)
268 fn test_format_args() {
269 let mut buf = String::new();
272 write!(w, "{}", format_args!("{}", 1));
273 write!(w, "{}", format_args!("test"));
274 write!(w, "{}", format_args!("{test}", test=3));
279 let s = fmt::format(format_args!("hello {}", "world"));
280 t!(s, "hello world");
281 let s = format!("{}: {}", "args were", format_args!("hello {}", "world"));
282 t!(s, "args were: hello world");
286 // Make sure format!() arguments are always evaluated in a left-to-right
289 static mut FOO: isize = 0;
295 assert_eq!(format!("{} {} {a} {b} {} {c}",
296 foo(), foo(), foo(), a=foo(), b=foo(), c=foo()),
297 "1 2 4 5 3 6".to_string());
301 // Make sure each argument are evaluated only once even though it may be
302 // formatted multiple times
304 static mut FOO: isize = 0;
310 assert_eq!(format!("{0} {0} {0} {a} {a} {a}", foo(), a=foo()),
311 "1 1 1 2 2 2".to_string());
315 let refcell = RefCell::new(5);
316 assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }");
317 let borrow = refcell.borrow_mut();
318 assert_eq!(format!("{:?}", refcell), "RefCell { value: <borrowed> }");
320 assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }");