src/libcore/fmt/rt/v1.rs

   1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 //! This is an internal module used by the ifmt! runtime. These structures are
  12 //! emitted to static arrays to precompile format strings ahead of time.
  13 //!
  14 //! These definitions are similar to their `ct` equivalents, but differ in that
  15 //! these can be statically allocated and are slightly optimized for the runtime
  16 #![allow(missing_debug_implementations)]
  17
  18 #[derive(Copy, Clone)]
  19 pub struct Argument {
  20     pub position: Position,
  21     pub format: FormatSpec,
  22 }
  23
  24 #[derive(Copy, Clone)]
  25 pub struct FormatSpec {
  26     pub fill: char,
  27     pub align: Alignment,
  28     pub flags: u32,
  29     pub precision: Count,
  30     pub width: Count,
  31 }
  32
  33 /// Possible alignments that can be requested as part of a formatting directive.
  34 #[derive(Copy, Clone, PartialEq)]
  35 pub enum Alignment {
  36     /// Indication that contents should be left-aligned.
  37     Left,
  38     /// Indication that contents should be right-aligned.
  39     Right,
  40     /// Indication that contents should be center-aligned.
  41     Center,
  42     /// No alignment was requested.
  43     Unknown,
  44 }
  45
  46 #[derive(Copy, Clone)]
  47 pub enum Count {
  48     Is(usize),
  49     Param(usize),
  50     NextParam,
  51     Implied,
  52 }
  53
  54 #[derive(Copy, Clone)]
  55 pub enum Position {
  56     Next,
  57     At(usize),
  58 }