Struct clippy_utils::macros::FormatSpec

pub struct FormatSpec<'tcx> {
    pub fill: Option<char>,
    pub align: Alignment,
    pub flags: u32,
    pub precision: Count<'tcx>,
    pub width: Count<'tcx>,
    pub trait: Symbol,
    pub trait_span: Option<Span>,
}

Specification for the formatting of an argument in the format string. See https://doc.rust-lang.org/std/fmt/index.html#formatting-parameters for the precise meanings.

Fields

fill: Option<char>

Optionally specified character to fill alignment with.

align: Alignment

Optionally specified alignment.

flags: u32

Packed version of various flags provided, see rustc_parse_format::Flag.

precision: Count<'tcx>

Represents either the maximum width or the integer precision.

width: Count<'tcx>

The minimum width, will be padded according to width/align

trait: Symbol

The formatting trait used by the argument, e.g. sym::Display for {}, sym::Debug for {:?}.

trait_span: Option<Span>

Implementations

impl<'tcx> FormatSpec<'tcx>

fn new(
    spec: FormatSpec<'_>,
    positions: ParamPosition,
    values: &FormatArgsValues<'tcx>
) -> Option<Self>

pub fn is_default(&self) -> bool

Returns true if this format spec is unchanged from the default. e.g. returns true for {}, {foo} and {2}, but false for {:?}, {foo:5} and {3:.5}

pub fn is_default_for_trait(&self) -> bool

Has no other formatting specifiers than setting the format trait. returns true for {}, {foo}, {:?}, but false for {foo:5}, {3:.5?}

Trait Implementations

impl<'tcx> Debug for FormatSpec<'tcx>

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

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 96 bytes