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