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rust/src/test/ui/macros/format-foreign.stderr

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Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
2016-11-10 22:23:15 -06:00
error: multiple unused formatting arguments
--> $DIR/format-foreign.rs:12:5
|
12 | println!("%.*3$s %s!/n", "Hello,", "World", 4);
Change the error message for multiple unused print params
2017-07-18 21:06:24 -05:00
| ^^^^^^^^^^^^^^^^^^^^^^^^^--------^^-------^^-^^
| | | |
| | | unused
| | unused
| unused
Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
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|
= help: `%.*3$s` should be written as `{:.2$}`
= help: `%s` should be written as `{}`
= note: printf formatting not supported; see the documentation for `std::fmt`
mention nightly in -Z external-macro-backtrace note
2017-11-21 13:48:35 -06:00
= note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
2016-11-10 22:23:15 -06:00
error: argument never used
--> $DIR/format-foreign.rs:13:29
|
Merge cfail and ui tests into ui tests
2017-11-20 06:13:27 -06:00
13 | println!("%1$*2$.*3$f", 123.456); //~ ERROR never used
Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
2016-11-10 22:23:15 -06:00
| ^^^^^^^
|
= help: `%1$*2$.*3$f` should be written as `{0:1$.2$}`
= note: printf formatting not supported; see the documentation for `std::fmt`
error: argument never used
--> $DIR/format-foreign.rs:17:30
|
Merge cfail and ui tests into ui tests
2017-11-20 06:13:27 -06:00
17 | println!("{} %f", "one", 2.0); //~ ERROR never used
Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
2016-11-10 22:23:15 -06:00
| ^^^
error: named argument never used
--> $DIR/format-foreign.rs:19:39
|
Merge cfail and ui tests into ui tests
2017-11-20 06:13:27 -06:00
19 | println!("Hi there, $NAME.", NAME="Tim"); //~ ERROR never used
Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
2016-11-10 22:23:15 -06:00
| ^^^^^
|
= help: `$NAME` should be written as `{NAME}`
= note: shell formatting not supported; see the documentation for `std::fmt`
Revert "Change error count messages" This reverts commit 5558c64f33446225739c1153b43d2e309bb4f50e.
2017-07-02 05:49:30 -05:00
error: aborting due to 4 previous errors
Add foreign formatting directive detection. This teaches `format_args!` how to interpret format printf- and shell-style format directives. This is used in cases where there are unused formatting arguments, and the reason for that *might* be because the programmer is trying to use the wrong kind of formatting string. This was prompted by an issue encountered by simulacrum on the #rust IRC channel. In short: although `println!` told them that they weren't using all of the conversion arguments, the problem was in using printf-syle directives rather than ones `println!` would undertand. Where possible, `format_args!` will tell the programmer what they should use instead. For example, it will suggest replacing `%05d` with `{:0>5}`, or `%2$.*3$s` with `{1:.3$}`. Even if it cannot suggest a replacement, it will explicitly note that Rust does not support that style of directive, and direct the user to the `std::fmt` documentation.
2016-11-10 22:23:15 -06:00
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