4af3494bb0
This commit applies the stabilization of std::fmt as outlined in [RFC 380][rfc]. There are a number of breaking changes as a part of this commit which will need to be handled to migrated old code: * A number of formatting traits have been removed: String, Bool, Char, Unsigned, Signed, and Float. It is recommended to instead use Show wherever possible or to use adaptor structs to implement other methods of formatting. * The format specifier for Boolean has changed from `t` to `b`. * The enum `FormatError` has been renamed to `Error` as well as becoming a unit struct instead of an enum. The `WriteError` variant no longer exists. * The `format_args_method!` macro has been removed with no replacement. Alter code to use the `format_args!` macro instead. * The public fields of a `Formatter` have become read-only with no replacement. Use a new formatting string to alter the formatting flags in combination with the `write!` macro. The fields can be accessed through accessor methods on the `Formatter` structure. Other than these breaking changes, the contents of std::fmt should now also all contain stability markers. Most of them are still #[unstable] or #[experimental] [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0380-stabilize-std-fmt.md [breaking-change] Closes #18904
58 lines
2.3 KiB
Rust
58 lines
2.3 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
fn main() {
|
|
// bad arguments to the format! call
|
|
|
|
format!("{}"); //~ ERROR: invalid reference to argument
|
|
|
|
format!("{1}", 1); //~ ERROR: invalid reference to argument `1`
|
|
//~^ ERROR: argument never used
|
|
format!("{foo}"); //~ ERROR: no argument named `foo`
|
|
|
|
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!("{0:x} {0:X}", 1); //~ ERROR: redeclared with type `X`
|
|
format!("{foo:x} {foo:X}", foo=1); //~ ERROR: redeclared with type `X`
|
|
|
|
format!("{foo}", foo=1, foo=2); //~ ERROR: duplicate argument
|
|
format!("", foo=1, 2); //~ ERROR: positional arguments cannot follow
|
|
|
|
// bad number of arguments, see #15780
|
|
|
|
format!("{0}");
|
|
//~^ ERROR invalid reference to argument `0` (no arguments given)
|
|
|
|
format!("{0} {1}", 1);
|
|
//~^ ERROR invalid reference to argument `1` (there is 1 argument)
|
|
|
|
format!("{0} {1} {2}", 1, 2);
|
|
//~^ ERROR invalid reference to argument `2` (there are 2 arguments)
|
|
|
|
format!("{0} {1}");
|
|
//~^ ERROR invalid reference to argument `0` (no arguments given)
|
|
//~^^ ERROR invalid reference to argument `1` (no arguments given)
|
|
|
|
// 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!(); //~ ERROR: requires at least a format string argument
|
|
format!("" 1); //~ ERROR: expected token: `,`
|
|
format!("", 1 1); //~ ERROR: expected token: `,`
|
|
}
|