# Struct core::fmt::Arguments 1.0.0[−][src]

    pub struct Arguments<'a> { /* fields omitted */ }

This structure represents a safely precompiled version of a format string and its arguments. This cannot be generated at runtime because it cannot safely be done, so no constructors are given and the fields are private to prevent modification.

The `format_args!` macro will safely create an instance of this structure. The macro validates the format string at compile-time so usage of the `write` and `format` functions can be safely performed.

You can use the `Arguments<'a>` that `format_args!` returns in `Debug` and `Display` contexts as seen below. The example also shows that `Debug` and `Display` format to the same thing: the interpolated format string in `format_args!`.

    let debug = format!("{:?}", format_args!("{} foo {:?}", 1, 2));
    let display = format!("{}", format_args!("{} foo {:?}", 1, 2));
    assert_eq!("1 foo 2", display);
    assert_eq!(display, debug);Run

## Trait Implementations

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`impl<'a> Copy for Arguments<'a>`

[src]

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`impl<'a> Clone for Arguments<'a>`

[src]

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`fn clone(&self) -> Arguments<'a>`

[src]

Returns a copy of the value. Read more

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`fn clone_from(&mut self, source: &Self)`

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Performs copy-assignment from `source`. Read more

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`impl<'a> Debug for Arguments<'a>`

[src]

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`fn fmt(&self, fmt: &mut Formatter) -> Result`

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Formats the value using the given formatter. Read more

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`impl<'a> Display for Arguments<'a>`

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`fn fmt(&self, fmt: &mut Formatter) -> Result`

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Formats the value using the given formatter. Read more

## Auto Trait Implementations

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`impl<'a> !Send for Arguments<'a>`

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`impl<'a> !Sync for Arguments<'a>`

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