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,
+}