4 #![allow(unused_must_use)]
5 #![allow(unused_features)]
6 #![feature(box_syntax)]
8 use std::cell::RefCell;
9 use std::fmt::{self, Write};
17 impl fmt::LowerHex for A {
18 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
22 impl fmt::UpperHex for B {
23 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
27 impl fmt::Display for C {
28 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
29 f.pad_integral(true, "☃", "123")
32 impl fmt::Binary for D {
33 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
41 ($a:expr, $b:expr) => { assert_eq!($a, $b) }
45 // Various edge cases without formats
47 t!(format!("hello"), "hello");
48 t!(format!("hello {{"), "hello {");
50 // default formatters should work
51 t!(format!("{}", 1.0f32), "1");
52 t!(format!("{}", 1.0f64), "1");
53 t!(format!("{}", "a"), "a");
54 t!(format!("{}", "a".to_string()), "a");
55 t!(format!("{}", false), "false");
56 t!(format!("{}", 'a'), "a");
58 // At least exercise all the formats
59 t!(format!("{}", true), "true");
60 t!(format!("{}", '☃'), "☃");
61 t!(format!("{}", 10), "10");
62 t!(format!("{}", 10_usize), "10");
63 t!(format!("{:?}", '☃'), "'☃'");
64 t!(format!("{:?}", 10), "10");
65 t!(format!("{:?}", 10_usize), "10");
66 t!(format!("{:?}", "true"), "\"true\"");
67 t!(format!("{:?}", "foo\nbar"), "\"foo\\nbar\"");
68 t!(format!("{:?}", "foo\n\"bar\"\r\n\'baz\'\t\\qux\\"),
69 r#""foo\n\"bar\"\r\n\'baz\'\t\\qux\\""#);
70 t!(format!("{:?}", "foo\0bar\x01baz\u{7f}q\u{75}x"),
71 r#""foo\u{0}bar\u{1}baz\u{7f}qux""#);
72 t!(format!("{:o}", 10_usize), "12");
73 t!(format!("{:x}", 10_usize), "a");
74 t!(format!("{:X}", 10_usize), "A");
75 t!(format!("{}", "foo"), "foo");
76 t!(format!("{}", "foo".to_string()), "foo");
77 if cfg!(target_pointer_width = "32") {
78 t!(format!("{:#p}", 0x1234 as *const isize), "0x00001234");
79 t!(format!("{:#p}", 0x1234 as *mut isize), "0x00001234");
81 t!(format!("{:#p}", 0x1234 as *const isize), "0x0000000000001234");
82 t!(format!("{:#p}", 0x1234 as *mut isize), "0x0000000000001234");
84 t!(format!("{:p}", 0x1234 as *const isize), "0x1234");
85 t!(format!("{:p}", 0x1234 as *mut isize), "0x1234");
86 t!(format!("{:x}", A), "aloha");
87 t!(format!("{:X}", B), "adios");
88 t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃");
89 t!(format!("{1} {0}", 0, 1), "1 0");
90 t!(format!("{foo} {bar}", foo=0, bar=1), "0 1");
91 t!(format!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0");
92 t!(format!("{} {0}", "a"), "a a");
93 t!(format!("{foo_bar}", foo_bar=1), "1");
94 t!(format!("{}", 5 + 5), "10");
95 t!(format!("{:#4}", C), "☃123");
96 t!(format!("{:b}", D), "aa☃bb");
98 let a: &dyn fmt::Debug = &1;
99 t!(format!("{:?}", a), "1");
102 // Formatting strings and their arguments
103 t!(format!("{}", "a"), "a");
104 t!(format!("{:4}", "a"), "a ");
105 t!(format!("{:4}", "☃"), "☃ ");
106 t!(format!("{:>4}", "a"), " a");
107 t!(format!("{:<4}", "a"), "a ");
108 t!(format!("{:^5}", "a"), " a ");
109 t!(format!("{:^5}", "aa"), " aa ");
110 t!(format!("{:^4}", "a"), " a ");
111 t!(format!("{:^4}", "aa"), " aa ");
112 t!(format!("{:.4}", "a"), "a");
113 t!(format!("{:4.4}", "a"), "a ");
114 t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
115 t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
116 t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
117 t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
118 t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), " aaaa");
119 t!(format!("{:2.4}", "aaaaa"), "aaaa");
120 t!(format!("{:2.4}", "aaaa"), "aaaa");
121 t!(format!("{:2.4}", "aaa"), "aaa");
122 t!(format!("{:2.4}", "aa"), "aa");
123 t!(format!("{:2.4}", "a"), "a ");
124 t!(format!("{:0>2}", "a"), "0a");
125 t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa");
126 t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa");
127 t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa");
128 t!(format!("{:1$}", "a", 4), "a ");
129 t!(format!("{1:0$}", 4, "a"), "a ");
130 t!(format!("{:a$}", "a", a=4), "a ");
131 t!(format!("{:-#}", "a"), "a");
132 t!(format!("{:+#}", "a"), "a");
133 t!(format!("{:/^10.8}", "1234567890"), "/12345678/");
136 t!(format!("{:}", 1.0f32), "1");
137 t!(format!("{:}", 1.0f64), "1");
138 t!(format!("{:.3}", 1.0f64), "1.000");
139 t!(format!("{:10.3}", 1.0f64), " 1.000");
140 t!(format!("{:+10.3}", 1.0f64), " +1.000");
141 t!(format!("{:+10.3}", -1.0f64), " -1.000");
143 t!(format!("{:e}", 1.2345e6f32), "1.2345e6");
144 t!(format!("{:e}", 1.2345e6f64), "1.2345e6");
145 t!(format!("{:E}", 1.2345e6f64), "1.2345E6");
146 t!(format!("{:.3e}", 1.2345e6f64), "1.234e6");
147 t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6");
148 t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6");
149 t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6");
152 t!(format!("{}", -0.0), "0");
153 t!(format!("{:?}", -0.0), "-0.0");
154 t!(format!("{:?}", 0.0), "0.0");
156 // sign aware zero padding
157 t!(format!("{:<3}", 1), "1 ");
158 t!(format!("{:>3}", 1), " 1");
159 t!(format!("{:^3}", 1), " 1 ");
160 t!(format!("{:03}", 1), "001");
161 t!(format!("{:<03}", 1), "001");
162 t!(format!("{:>03}", 1), "001");
163 t!(format!("{:^03}", 1), "001");
164 t!(format!("{:+03}", 1), "+01");
165 t!(format!("{:<+03}", 1), "+01");
166 t!(format!("{:>+03}", 1), "+01");
167 t!(format!("{:^+03}", 1), "+01");
168 t!(format!("{:#05x}", 1), "0x001");
169 t!(format!("{:<#05x}", 1), "0x001");
170 t!(format!("{:>#05x}", 1), "0x001");
171 t!(format!("{:^#05x}", 1), "0x001");
172 t!(format!("{:05}", 1.2), "001.2");
173 t!(format!("{:<05}", 1.2), "001.2");
174 t!(format!("{:>05}", 1.2), "001.2");
175 t!(format!("{:^05}", 1.2), "001.2");
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");
182 t!(format!("{:>+05}", 1.2), "+01.2");
183 t!(format!("{:^+05}", 1.2), "+01.2");
185 // Ergonomic format_args!
186 t!(format!("{0:x} {0:X}", 15), "f F");
187 t!(format!("{0:x} {0:X} {}", 15), "f F 15");
188 // NOTE: For now the longer test cases must not be followed immediately by
189 // >1 empty lines, or the pretty printer will break. Since no one wants to
190 // touch the current pretty printer (#751), we have no choice but to work
191 // around it. Some of the following test cases are also affected.
192 t!(format!("{:x}{0:X}{a:x}{:X}{1:x}{a:X}", 13, 14, a=15), "dDfEeF");
193 t!(format!("{a:x} {a:X}", a=15), "f F");
195 // And its edge cases
196 t!(format!("{a:.0$} {b:.0$} {0:.0$}\n{a:.c$} {b:.c$} {c:.c$}",
197 4, a="abcdefg", b="hijklmn", c=3),
198 "abcd hijk 4\nabc hij 3");
199 t!(format!("{a:.*} {0} {:.*}", 4, 3, "efgh", a="abcdef"), "abcd 4 efg");
200 t!(format!("{:.a$} {a} {a:#x}", "aaaaaa", a=2), "aa 2 0x2");
203 // Test that pointers don't get truncated.
205 let val = usize::MAX;
206 let exp = format!("{:#x}", val);
207 t!(format!("{:p}", val as *const isize), exp);
211 t!(format!("{{"), "{");
212 t!(format!("}}"), "}");
219 // make sure that format! doesn't move out of local variables
220 let a: Box<_> = box 3;
224 // make sure that format! doesn't cause spurious unused-unsafe warnings when
225 // it's inside of an outer unsafe block
227 let a: isize = ::std::mem::transmute(3_usize);
233 // test that trailing commas are acceptable
234 format!("{}", "test",);
235 format!("{foo}", foo="test",);
240 // Basic test to make sure that we can invoke the `write!` macro with an
241 // fmt::Write instance.
243 let mut buf = String::new();
244 write!(&mut buf, "{}", 3);
247 write!(w, "{foo}", foo=4);
248 write!(w, "{}", "hello");
249 writeln!(w, "{}", "line");
250 writeln!(w, "{foo}", foo="bar");
255 t!(buf, "34helloline\nbar\n☃str");
258 // Just make sure that the macros are defined, there's not really a lot that we
259 // can do with them just yet (to test the output)
262 print!("{:?}", vec![0u8]);
264 println!("this is a {}", "test");
265 println!("{foo}", foo="bar");
268 // Just make sure that the macros are defined, there's not really a lot that we
269 // can do with them just yet (to test the output)
270 fn test_format_args() {
271 let mut buf = String::new();
274 write!(w, "{}", format_args!("{}", 1));
275 write!(w, "{}", format_args!("test"));
276 write!(w, "{}", format_args!("{test}", test=3));
281 let s = fmt::format(format_args!("hello {}", "world"));
282 t!(s, "hello world");
283 let s = format!("{}: {}", "args were", format_args!("hello {}", "world"));
284 t!(s, "args were: hello world");
288 // Make sure format!() arguments are always evaluated in a left-to-right
291 static mut FOO: isize = 0;
297 assert_eq!(format!("{} {} {a} {b} {} {c}",
298 foo(), foo(), foo(), a=foo(), b=foo(), c=foo()),
299 "1 2 4 5 3 6".to_string());
303 // Make sure each argument are evaluated only once even though it may be
304 // formatted multiple times
306 static mut FOO: isize = 0;
312 assert_eq!(format!("{0} {0} {0} {a} {a} {a}", foo(), a=foo()),
313 "1 1 1 2 2 2".to_string());
317 let refcell = RefCell::new(5);
318 assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }");
319 let borrow = refcell.borrow_mut();
320 assert_eq!(format!("{:?}", refcell), "RefCell { value: <borrowed> }");
322 assert_eq!(format!("{:?}", refcell), "RefCell { value: 5 }");