v1.rs - source
Description: Source of the Rust file `library/core/src/fmt/rt/v1.rs`.
Keywords: rust, rustlang, rust-lang

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    //! This is an internal module used by the ifmt! runtime. These structures are
    //! emitted to static arrays to precompile format strings ahead of time.
    //!
    //! These definitions are similar to their `ct` equivalents, but differ in that
    //! these can be statically allocated and are slightly optimized for the runtime
    #![allow(missing_debug_implementations)]

    #[derive(Copy, Clone)]
    pub struct Argument {
        pub position: usize,
        pub format: FormatSpec,
    }

    #[derive(Copy, Clone)]
    pub struct FormatSpec {
        pub fill: char,
        pub align: Alignment,
        pub flags: u32,
        pub precision: Count,
        pub width: Count,
    }

    /// Possible alignments that can be requested as part of a formatting directive.
    #[derive(Copy, Clone, PartialEq, Eq)]
    pub enum Alignment {
        /// Indication that contents should be left-aligned.
        Left,
        /// Indication that contents should be right-aligned.
        Right,
        /// Indication that contents should be center-aligned.
        Center,
        /// No alignment was requested.
        Unknown,
    }

    /// Used by [width](https://doc.rust-lang.org/std/fmt/#width) and [precision](https://doc.rust-lang.org/std/fmt/#precision) specifiers.
    #[derive(Copy, Clone)]
    pub enum Count {
        /// Specified with a literal number, stores the value
        Is(usize),
        /// Specified using `$` and `*` syntaxes, stores the index into `args`
        Param(usize),
        /// Not specified
        Implied,
    }