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1 // Copyright 2013 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.
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 fn main() {
12 // bad arguments to the format! call
13
14 // bad number of arguments, see #44954 (originally #15780)
15
16 format!("{}");
17 //~^ ERROR: 1 positional argument in format string, but no arguments were given
18
19 format!("{1}", 1);
20 //~^ ERROR: invalid reference to positional argument 1 (there is 1 argument)
21 //~^^ ERROR: argument never used
22
23 format!("{} {}");
24 //~^ ERROR: 2 positional arguments in format string, but no arguments were given
25
26 format!("{0} {1}", 1);
27 //~^ ERROR: invalid reference to positional argument 1 (there is 1 argument)
28
29 format!("{0} {1} {2}", 1, 2);
30 //~^ ERROR: invalid reference to positional argument 2 (there are 2 arguments)
31
32 format!("{} {value} {} {}", 1, value=2);
33 //~^ ERROR: invalid reference to positional argument 2 (there are 2 arguments)
34 format!("{name} {value} {} {} {} {} {} {}", 0, name=1, value=2);
35 //~^ ERROR: invalid reference to positional arguments 3, 4 and 5 (there are 3 arguments)
36
37 format!("{} {foo} {} {bar} {}", 1, 2, 3);
38 //~^ ERROR: there is no argument named `foo`
39 //~^^ ERROR: there is no argument named `bar`
40
41 format!("{foo}"); //~ ERROR: no argument named `foo`
42 format!("", 1, 2); //~ ERROR: multiple unused formatting arguments
43 format!("{}", 1, 2); //~ ERROR: argument never used
44 format!("{1}", 1, 2); //~ ERROR: argument never used
45 format!("{}", 1, foo=2); //~ ERROR: named argument never used
46 format!("{foo}", 1, foo=2); //~ ERROR: argument never used
47 format!("", foo=2); //~ ERROR: named argument never used
48 format!("{} {}", 1, 2, foo=1, bar=2); //~ ERROR: multiple unused formatting arguments
49
50 format!("{foo}", foo=1, foo=2); //~ ERROR: duplicate argument
51 format!("", foo=1, 2); //~ ERROR: positional arguments cannot follow
52
53 // bad named arguments, #35082
54
55 format!("{valuea} {valueb}", valuea=5, valuec=7);
56 //~^ ERROR there is no argument named `valueb`
57 //~^^ ERROR named argument never used
58
59 // bad syntax of the format string
60
61 format!("{"); //~ ERROR: expected `'}'` but string was terminated
62
63 format!("foo } bar"); //~ ERROR: unmatched `}` found
64 format!("foo }"); //~ ERROR: unmatched `}` found
65
66 format!("foo %s baz", "bar"); //~ ERROR: argument never used
67 }