Struct FormattingOptions

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pub struct FormattingOptions { /* private fields */ }

🔬This is a nightly-only experimental API. (formatting_options)

Expand description

Options for formatting.

FormattingOptions is a Formatter without an attached Write trait. It is mainly used to construct Formatter instances.

Implementations§

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impl FormattingOptions

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pub const fn new() -> FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Construct a new FormatterBuilder with the supplied Write trait object for output that is equivalent to the {} formatting specifier:

no flags,
filled with spaces,
no alignment,
no width,
no precision, and
no DebugAsHex output mode.

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pub fn sign(&mut self, sign: Option<Sign>) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets or removes the sign (the + or the - flag).

+: This is intended for numeric types and indicates that the sign should always be printed. By default only the negative sign of signed values is printed, and the sign of positive or unsigned values is omitted. This flag indicates that the correct sign (+ or -) should always be printed.
-: Currently not used

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pub fn sign_aware_zero_pad( &mut self, sign_aware_zero_pad: bool, ) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets or unsets the 0 flag.

This is used to indicate for integer formats that the padding to width should both be done with a 0 character as well as be sign-aware

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pub fn alternate(&mut self, alternate: bool) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets or unsets the # flag.

This flag indicates that the “alternate” form of printing should be used. The alternate forms are:

Debug : pretty-print the Debug formatting (adds linebreaks and indentation)
LowerHex as well as UpperHex - precedes the argument with a 0x
Octal - precedes the argument with a 0b
Binary - precedes the argument with a 0o

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pub fn fill(&mut self, fill: char) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets the fill character.

The optional fill character and alignment is provided normally in conjunction with the width parameter. This indicates that if the value being formatted is smaller than width some extra characters will be printed around it.

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pub fn align(&mut self, align: Option<Alignment>) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets or removes the alignment.

The alignment specifies how the value being formatted should be positioned if it is smaller than the width of the formatter.

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pub fn width(&mut self, width: Option<u16>) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets or removes the width.

This is a parameter for the “minimum width” that the format should take up. If the value’s string does not fill up this many characters, then the padding specified by FormattingOptions::fill/FormattingOptions::align will be used to take up the required space.

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pub fn precision(&mut self, precision: Option<u16>) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Sets or removes the precision.

For non-numeric types, this can be considered a “maximum width”. If the resulting string is longer than this width, then it is truncated down to this many characters and that truncated value is emitted with proper fill, alignment and width if those parameters are set.
For integral types, this is ignored.
For floating-point types, this indicates how many digits after the decimal point should be printed.

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pub fn debug_as_hex( &mut self, debug_as_hex: Option<DebugAsHex>, ) -> &mut FormattingOptions

🔬This is a nightly-only experimental API. (formatting_options)

Specifies whether the Debug trait should use lower-/upper-case hexadecimal or normal integers

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pub const fn get_sign(&self) -> Option<Sign>

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current sign (the + or the - flag).

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pub const fn get_sign_aware_zero_pad(&self) -> bool

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current 0 flag.

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pub const fn get_alternate(&self) -> bool

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current # flag.

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pub const fn get_fill(&self) -> char

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current fill character.

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pub const fn get_align(&self) -> Option<Alignment>

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current alignment.

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pub const fn get_width(&self) -> Option<u16>

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current width.

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pub const fn get_precision(&self) -> Option<u16>

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current precision.

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pub const fn get_debug_as_hex(&self) -> Option<DebugAsHex>

🔬This is a nightly-only experimental API. (formatting_options)

Returns the current precision.

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pub fn create_formatter<'a>(self, write: &'a mut dyn Write) -> Formatter<'a>

🔬This is a nightly-only experimental API. (formatting_options)

Creates a Formatter that writes its output to the given Write trait.

You may alternatively use Formatter::new().

Trait Implementations§

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impl Clone for FormattingOptions

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fn clone(&self) -> FormattingOptions

Returns a copy of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

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impl Debug for FormattingOptions

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

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fn eq(&self, other: &FormattingOptions) -> bool

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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impl Copy for FormattingOptions

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impl Eq for FormattingOptions

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impl StructuralPartialEq for FormattingOptions

Auto Trait Implementations§

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impl Freeze for FormattingOptions

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impl RefUnwindSafe for FormattingOptions

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impl Send for FormattingOptions

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impl Sync for FormattingOptions

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impl Unpin for FormattingOptions

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impl UnwindSafe for FormattingOptions

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🔬This is a nightly-only experimental API. (clone_to_uninit)

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Struct FormattingOptionsCopy item path

Implementations§

impl FormattingOptions

pub const fn new() -> FormattingOptions

pub fn sign(&mut self, sign: Option<Sign>) -> &mut FormattingOptions

pub fn sign_aware_zero_pad( &mut self, sign_aware_zero_pad: bool, ) -> &mut FormattingOptions

pub fn alternate(&mut self, alternate: bool) -> &mut FormattingOptions

pub fn fill(&mut self, fill: char) -> &mut FormattingOptions

pub fn align(&mut self, align: Option<Alignment>) -> &mut FormattingOptions

pub fn width(&mut self, width: Option<u16>) -> &mut FormattingOptions

pub fn precision(&mut self, precision: Option<u16>) -> &mut FormattingOptions

pub fn debug_as_hex( &mut self, debug_as_hex: Option<DebugAsHex>, ) -> &mut FormattingOptions

pub const fn get_sign(&self) -> Option<Sign>

pub const fn get_sign_aware_zero_pad(&self) -> bool

pub const fn get_alternate(&self) -> bool

pub const fn get_fill(&self) -> char

pub const fn get_align(&self) -> Option<Alignment>

pub const fn get_width(&self) -> Option<u16>

pub const fn get_precision(&self) -> Option<u16>

pub const fn get_debug_as_hex(&self) -> Option<DebugAsHex>

pub fn create_formatter<'a>(self, write: &'a mut dyn Write) -> Formatter<'a>

Trait Implementations§

impl Clone for FormattingOptions

fn clone(&self) -> FormattingOptions

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

impl Debug for FormattingOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

impl Default for FormattingOptions

fn default() -> FormattingOptions

impl PartialEq for FormattingOptions

fn eq(&self, other: &FormattingOptions) -> bool

fn ne(&self, other: &Rhs) -> bool

impl Copy for FormattingOptions

impl Eq for FormattingOptions

impl StructuralPartialEq for FormattingOptions

Auto Trait Implementations§

impl Freeze for FormattingOptions

impl RefUnwindSafe for FormattingOptions

impl Send for FormattingOptions

impl Sync for FormattingOptions

impl Unpin for FormattingOptions

impl UnwindSafe for FormattingOptions

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Struct FormattingOptions

impl<T> Any for T
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