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fn main() {
// bad arguments to the format! call
// bad number of arguments, see #44954 (originally #15780)
format!("{}");
//~^ ERROR: 1 positional argument in format string, but no arguments were given
format!("{1}", 1);
//~^ ERROR: invalid reference to positional argument 1 (there is 1 argument)
//~^^ ERROR: argument never used
format!("{} {}");
//~^ ERROR: 2 positional arguments in format string, but no arguments were given
format!("{0} {1}", 1);
//~^ ERROR: invalid reference to positional argument 1 (there is 1 argument)
format!("{0} {1} {2}", 1, 2);
//~^ ERROR: invalid reference to positional argument 2 (there are 2 arguments)
format!("{} {value} {} {}", 1, value=2);
//~^ ERROR: 3 positional arguments in format string, but there are 2 arguments
format!("{name} {value} {} {} {} {} {} {}", 0, name=1, value=2);
//~^ ERROR: 6 positional arguments in format string, but there are 3 arguments
format!("{} {foo} {} {bar} {}", 1, 2, 3);
//~^ ERROR: cannot find value `foo` in this scope
//~^^ ERROR: cannot find value `bar` in this scope
format!("{foo}"); //~ ERROR: cannot find value `foo` in this scope
format!("", 1, 2); //~ ERROR: multiple unused formatting arguments
format!("{}", 1, 2); //~ ERROR: argument never used
format!("{1}", 1, 2); //~ ERROR: argument never used
format!("{}", 1, foo=2); //~ ERROR: named argument never used
format!("{foo}", 1, foo=2); //~ ERROR: argument never used
format!("", foo=2); //~ ERROR: named argument never used
format!("{} {}", 1, 2, foo=1, bar=2); //~ ERROR: multiple unused formatting arguments
format!("{foo}", foo=1, foo=2); //~ ERROR: duplicate argument
format!("{foo} {} {}", foo=1, 2); //~ ERROR: positional arguments cannot follow
// bad named arguments, #35082
format!("{valuea} {valueb}", valuea=5, valuec=7);
//~^ ERROR cannot find value `valueb` in this scope
//~^^ ERROR named argument never used
// bad syntax of the format string
format!("{"); //~ ERROR: expected `'}'` but string was terminated
format!("foo } bar"); //~ ERROR: unmatched `}` found
format!("foo }"); //~ ERROR: unmatched `}` found
format!("foo %s baz", "bar"); //~ ERROR: argument never used
format!(r##"
{foo}
"##);
//~^^^ ERROR: cannot find value `foo` in this scope
// bad syntax in format string with multiple newlines, #53836
format!("first number: {}
second number: {}
third number: {}
fourth number: {}
fifth number: {}
sixth number: {}
seventh number: {}
eighth number: {}
ninth number: {
tenth number: {}",
1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
//~^^ ERROR: invalid format string
println!("{} {:.*} {}", 1, 3.2, 4);
//~^ ERROR 4 positional arguments in format string, but there are 3 arguments
//~| ERROR mismatched types
println!("{} {:07$.*} {}", 1, 3.2, 4);
//~^ ERROR invalid reference to positional arguments 3 and 7 (there are 3 arguments)
//~| ERROR mismatched types
println!("{} {:07$} {}", 1, 3.2, 4);
//~^ ERROR invalid reference to positional argument 7 (there are 3 arguments)
println!("{:foo}", 1); //~ ERROR unknown format trait `foo`
println!("{5} {:4$} {6:7$}", 1);
//~^ ERROR invalid reference to positional arguments 4, 5, 6 and 7 (there is 1 argument)
let foo = 1;
println!("{foo:0$}");
//~^ ERROR invalid reference to positional argument 0 (no arguments were given)
// We used to ICE here because we tried to unconditionally access the first argument, which
// doesn't exist.
println!("{:.*}");
//~^ ERROR 2 positional arguments in format string, but no arguments were given
println!("{:.0$}");
//~^ ERROR invalid reference to positional argument 0 (no arguments were given)
}
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