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.
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.
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.
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
17 #![experimental = "implementation detail of the `format_args!` macro"]
19 pub use self::Alignment::*;
20 pub use self::Count::*;
21 pub use self::Position::*;
22 pub use self::Flag::*;
26 pub struct Argument<'a> {
27 pub position: Position,
28 pub format: FormatSpec,
33 pub struct FormatSpec {
41 /// Possible alignments that can be requested as part of a formatting directive.
42 #[derive(Copy, PartialEq)]
44 /// Indication that contents should be left-aligned.
46 /// Indication that contents should be right-aligned.
48 /// Indication that contents should be center-aligned.
50 /// No alignment was requested.
57 CountIs(uint), CountIsParam(uint), CountIsNextParam, CountImplied,
63 ArgumentNext, ArgumentIs(uint)
66 /// Flags which can be passed to formatting via a directive.
68 /// These flags are discovered through the `flags` field of the `Formatter`
69 /// structure. The flag in that structure is a union of these flags into a
70 /// `uint` where each flag's discriminant is the corresponding bit.
73 /// A flag which enables number formatting to always print the sign of a
76 /// Currently not a used flag
78 /// Indicates that the "alternate formatting" for a type should be used.
80 /// The meaning of this flag is type-specific.
82 /// Indicates that padding should be done with a `0` character as well as
83 /// being aware of the sign to be printed.