1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. //! 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 #![experimental = "implementation detail of the `format_args!` macro"] pub use self::Alignment::*; pub use self::Count::*; pub use self::Position::*; pub use self::Flag::*; #[doc(hidden)] #[deriving(Copy)] pub struct Argument<'a> { pub position: Position, pub format: FormatSpec, } #[doc(hidden)] #[deriving(Copy)] pub struct FormatSpec { pub fill: char, pub align: Alignment, pub flags: uint, pub precision: Count, pub width: Count, } /// Possible alignments that can be requested as part of a formatting directive. #[deriving(Copy, PartialEq)] pub enum Alignment { /// Indication that contents should be left-aligned. AlignLeft, /// Indication that contents should be right-aligned. AlignRight, /// Indication that contents should be center-aligned. AlignCenter, /// No alignment was requested. AlignUnknown, } #[doc(hidden)] #[deriving(Copy)] pub enum Count { CountIs(uint), CountIsParam(uint), CountIsNextParam, CountImplied, } #[doc(hidden)] #[deriving(Copy)] pub enum Position { ArgumentNext, ArgumentIs(uint) } /// Flags which can be passed to formatting via a directive. /// /// These flags are discovered through the `flags` field of the `Formatter` /// structure. The flag in that structure is a union of these flags into a /// `uint` where each flag's discriminant is the corresponding bit. #[deriving(Copy)] pub enum Flag { /// A flag which enables number formatting to always print the sign of a /// number. FlagSignPlus, /// Currently not a used flag FlagSignMinus, /// Indicates that the "alternate formatting" for a type should be used. /// /// The meaning of this flag is type-specific. FlagAlternate, /// Indicates that padding should be done with a `0` character as well as /// being aware of the sign to be printed. FlagSignAwareZeroPad, }