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Diffstat (limited to 'library/core/src/fmt/rt/v1.rs')
-rw-r--r-- | library/core/src/fmt/rt/v1.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/library/core/src/fmt/rt/v1.rs b/library/core/src/fmt/rt/v1.rs new file mode 100644 index 000000000..37202b277 --- /dev/null +++ b/library/core/src/fmt/rt/v1.rs @@ -0,0 +1,45 @@ +//! 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, +} |