79 lines
2.4 KiB
Rust
79 lines
2.4 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! This is an internal module used by the ifmt! runtime. These structures are
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//! emitted to static arrays to precompile format strings ahead of time.
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//!
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//! These definitions are similar to their `ct` equivalents, but differ in that
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//! these can be statically allocated and are slightly optimized for the runtime
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#[doc(hidden)]
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pub enum Piece<'a> {
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String(&'a str),
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Argument(Argument<'a>),
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}
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#[doc(hidden)]
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pub struct Argument<'a> {
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pub position: Position,
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pub format: FormatSpec,
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}
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#[doc(hidden)]
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pub struct FormatSpec {
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pub fill: char,
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pub align: Alignment,
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pub flags: uint,
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pub precision: Count,
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pub width: Count,
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}
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/// Possible alignments that can be requested as part of a formatting directive.
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#[deriving(PartialEq)]
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pub enum Alignment {
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/// Indication that contents should be left-aligned.
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AlignLeft,
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/// Indication that contents should be right-aligned.
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AlignRight,
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/// No alignment was requested.
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AlignUnknown,
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}
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#[doc(hidden)]
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pub enum Count {
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CountIs(uint), CountIsParam(uint), CountIsNextParam, CountImplied,
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}
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#[doc(hidden)]
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pub enum Position {
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ArgumentNext, ArgumentIs(uint)
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}
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/// Flags which can be passed to formatting via a directive.
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///
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/// These flags are discovered through the `flags` field of the `Formatter`
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/// structure. The flag in that structure is a union of these flags into a
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/// `uint` where each flag's discriminant is the corresponding bit.
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pub enum Flag {
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/// A flag which enables number formatting to always print the sign of a
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/// number.
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FlagSignPlus,
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/// Currently not a used flag
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FlagSignMinus,
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/// Indicates that the "alternate formatting" for a type should be used.
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///
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/// The meaning of this flag is type-specific.
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FlagAlternate,
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/// Indicates that padding should be done with a `0` character as well as
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/// being aware of the sign to be printed.
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FlagSignAwareZeroPad,
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}
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